3. DEMOS = PEOPLE
GRAPHOS = WRITE / RECORD / DRAWING
“Demography is that branch of social science,is that branch of social science,
which deals with the statistical study of size,which deals with the statistical study of size,
structure and distribution of populations,structure and distribution of populations,
along with the spatial and temporal changes inalong with the spatial and temporal changes in
them in response to birth, migration, agingthem in response to birth, migration, aging
and death.and death.””
Demographic analysis can be applied to whole
societies or to groups defined by criteria such as
education, nationality, religion and ethnicity. In
academia, demography is often regarded as a branch
of either anthropology, economics, or sociology
4. Study of human population concerning their
Size ( total no. of persons in specific area in sp. time)
Composition (breakdown according to age,sex, literacy level , income
etc)
Distribution (arrangement of people in space at a given time e.g.
urban % ,rural%, etc.)
Structure (distribution among age, sex grouping etc. e.g.<5 yr. or
>65yr male? , female?) etc.
Changes / Behaviour within them (pop. growth, pop.
Decline, Positive growth, Zero growth, Negative growth etc.)
POPULATION STUDIES
Social effects
Economic effects
Health factors
Geographic
Environmental
5. Also concerned with characteristics of human beings
such as :
Ethnicity (race / language)
Social characteristics (literacy, marital status,
educational attainment)
Religion
SOURCES OF DEMOGRAPHIC DATA
Census
Surveys
Registration (birth / death )
6. CARRYING CAPACITY:CARRYING CAPACITY: The maximum sustainable
size of a resident population in a given ecosystem
CRUDE RATE:CRUDE RATE: rate of any demographic event
computed for an entire population
8. Actual reproductive performance
(behavior) of a women / couple.
It is generally confined to women
•CRUDE BIRTH RATE (CBR)
•GENERAL FERTILITY RATE (GFR)
•AGE SPECIFIC FERTILITY RATE (ASFR)
•TOTAL FERTILITY RATE (TFR) Pak= 5.6
•GROSS REPRODUCTION RATE(GRR)
•NET REPRODUCTION RATE (NRR)
ORIGINAL RATES
DERIVED RATES
9. •CHILD BEARING PERFORMANCE •CHILD BEARING CAPACITY
•Voluntary biological process •Inherent biological capacity
•Varies among individual depending
upon their reproductive behavior
•Fecundity is almost uniformly distributed
in both sexes
•Influenced by various social and
biological factors (age at marriage,
duration of marriage, spacing of
children, child survival, educational
status, economic stability, cultural
beliefs & practices)
•Fecundity of man starts at puberty and
continues throughout life; it attains its
maximum during second and third decade
of life and diminishes gradually
•Fecundity of woman starts and menarche
and ends with menopause
•Considerably reduced by various
methods of fertility control available to
couples
•Fecundity of a couple is essentially
determined by fecundity of female partners
•Increase in inter-pregnancy intervals
reduces fertility
•Equally fecund women demonstrates
variable levels of fertility in response to
variable levels of control on their child
bearing performance
10.
11. if you get one good shot on a roll of 36, you were doing good. That’s theif you get one good shot on a roll of 36, you were doing good. That’s the ratioratio::
36:136:1., or., or 1/361/36, 1 to 36, 1 to 36
When resting, the average adult human heart beats at about 70 bpm (males)When resting, the average adult human heart beats at about 70 bpm (males)
and 75 bpm (females); however, thisand 75 bpm (females); however, this raterate varies among people and can bevaries among people and can be
significantly lower in endurance athletes….significantly lower in endurance athletes…. 10 km per 2 h, $6 per 3 h10 km per 2 h, $6 per 3 h
Example:
A rate is one kind of ratio.A rate is one kind of ratio.
Ratio: the relation between two similar magnitudes withthe relation between two similar magnitudes with
respect to the number of times the first contains the second;respect to the number of times the first contains the second;
proportional relation.("the relationship in quantity, amount, orproportional relation.("the relationship in quantity, amount, or
size between two or more things“)size between two or more things“)
Rate: a certain quantity or amount of one thing considereda certain quantity or amount of one thing considered
in relation to a unit of another thing andin relation to a unit of another thing and used as aused as a
standard or measurestandard or measure ((""a fixed ratio between two things“)a fixed ratio between two things“)
12. No. of abortions occurring during a given year
per 1000 women of reproductive age
Abortion Ratio
It is the ratio between the no. of abortions occurring
in a given year and the no. of live births
Maternal Mortality Rate
Number of maternal deaths per 100,000 live births
[PAKISTAN=500/100,000]
Maternal Mortality Ratio
The number of maternal deaths related to childbearing
divided by the number of live births (or by the number of live
births + fetal deaths) in that year.
13. GFR =GFR = NO. OF LIVE BIRTHS IN A YEARNO. OF LIVE BIRTHS IN A YEAR x 1000x 1000
NO. OF FEMALES AGES (15-49 yrs)NO. OF FEMALES AGES (15-49 yrs)
ASFR =ASFR = NO. OF LIVE BITHS IN A YEAR TO WOMEN AGE –XNO. OF LIVE BITHS IN A YEAR TO WOMEN AGE –X x 1000x 1000
NO. OF WOMEN AGED-XNO. OF WOMEN AGED-X
TFR = SUM OF ASFRsTFR = SUM OF ASFRs (15-49 yrs) [PAK= 3.17 ---- 2011est.][PAK= 3.17 ---- 2011est.]
[[ average no. of children a women would have if she was to pass through heraverage no. of children a women would have if she was to pass through her
reproductive years bearing children at same rates as the women now in eachreproductive years bearing children at same rates as the women now in each
age groupage group ]]
• Fertility rate is high in 20-30 yrs of age in all countriesFertility rate is high in 20-30 yrs of age in all countries
14. Dependency Ratio :
= Children + Elderly X 100
Working Age
= Pop below 15 + 65 & above X 100
Pop 16 – 64 years
Dependency Ratio of Pakistan = 83.34%
Dependency Ratio of UK = 66.5 %
Dependency Ratio of Japan = 44 %
Sex Ratio: The overall sex ratio is simply the ratio of
males to females in the population & is calculated by taking the
number of males in a population & dividing it by the number of
females in the same population
Sex Ratio = Number of Males X 100
Number of Females
15. No. of live births in a specified period at a specific placeNo. of live births in a specified period at a specific place x 100x 100
No. of deaths at same place and periodNo. of deaths at same place and period
EXAMPLE:
No. of live births in city (x) = 450
No. of deaths in same city and period = 300
V.I. = 450 / 300 x 100 = 150
If V.I. = 100 (births = death population is neither increasing nor
decreasing)
If V.I. > 100 (births > deaths ; population increasing)
If V.I. < 100 (births < deaths ; population decreasing)
Population Density = No. of persons / sq. mile
Pakistan = 206
16. Population Change =
Mortality + Fertility + (net) Migration
Pt 1 = Pt₀ + (B – D) + (IM - OM)
Pt 1 = Future Population
Pt₀ = Present Population
Population change can be due to
1.Natural Reasons (NATURAL INCREASE)
Natural Increase = No. of live births (B) - No. of residents died (D);
[ B-D]
2.Migration
Net Migration = In migration (IM)– Out migration(OM) ; [IM – OM]
POPULATION GROWTH (PG) = NATURAL INCREASE + NET MIGRATION
PG = (B –D) + (IM – OM)
17. Pt1 = Pt₀ (1 + r)t
WHERE
Pt ₀ = present population
Pt
1
= future population
r = growth rate per person (in proportion)
t = no. of years between t₀ and t1
EXAMPLE : We want to calculate the population of a community in year
2012 (Pt1), Population of a community is 20,000 in year
2006 (Pt0 ) and annual GR is 3%
P(2012) = P (2006) (1+ 3 / 100)6
= 20000 (1+ 3 /100 )6
= 20000(1+0.030)6
= 23880
OR
Pt = Pt [ 1 + (GR / 100 x No. of years)]
20. Total no. of persons added or subtracted from a
population as a result of combined effect of
immigration and emigration
Net Migration = In-migration (IM)– Out migration(OM) ; [IM – OM]
(Immigration – Emigration)
Migration rate = No. of migrants x 1000
Total population
Net migration rate PAKISTAN
-2.17 migrant(s)/1,000 population (2011 est.)
22. POPULATION STRUCTURE
The population pyramid displays the age
and sex structure of a country or given area
Population in
Five Year
Age bands
Usually, but not always,
In % to make for easier
comparisons
between countries
OLD
DEPENDANTS
ECONOMICALLY
ACTIVE
YOUNG
DEPENDANTS
FEMALES
To the rightMALES
To the left
23. What Population Pyramids Show UsWhat Population Pyramids Show Us
KEYKEY
slope of pyramid indicate the death rate
width of the base is related to birth rate/fertility rate
proportions of men and women can suggest male or female migrations
height of graph can indicate life expectancy (ignore the very thin end of the
wedge as occurs on graph B as these people are a definite minority)
"kinks" indicate dramatic reductions in birth rate or increases in
death rate in the past
area of graph indicates total population - compare areas of different
population age groups or different sex on one graph
The overall shape of the population pyramid can indicate whether it is an
Economically More Developed Country or Economically Less Developed
Country
Economically
More
Developed
Country
Economically
Less
Developed
Country
27. A broad based population pyramid is:
•UsuallyUsually agriculturalagricultural with problems ofwith problems of
overpopulationoverpopulation.
•Many Dependents (mainly <15 years age)Many Dependents (mainly <15 years age)
A BROAD-BASED PYRAMID means that
POPULATION needs to:
•increase food production
•build more homes & schools
•plan for more job opportunities for the young in
future
•implement birth control program /campaigns
(challenges of a broad based population pyramid)(challenges of a broad based population pyramid)
30. A NARROW BASED POPULATION
PYRAMID MEANS:
Birth rate and Death rate lowBirth rate and Death rate low
•Work out incentives to encourage more births
•Hiring foreign labour
•Proper medical services & health care for the aged
31.
32. 5 stages through which a nation passes during transition
1)1) HIGH STATIONARY STAGEHIGH STATIONARY STAGE (↑ CBR & CDR) e.g Amazon valley)
2)2) EARLY EXPANDING STAGEEARLY EXPANDING STAGE (↑CBR & ↓CDR) e.g Bangladesh)
3)3) LATE EXPANDING STAGELATE EXPANDING STAGE (↓CBR & ↓↓ CDR)e.g India/Pakistan)
4)4) LOW STATIONARY STAGELOW STATIONARY STAGE (↓CBR &↓ CDR) e.g. Sweden 0 GR)
5)5) DECLINING STAGEDECLINING STAGE (↓↓ CBR & ↓CDR) e.g. Germany (–ve GR)
33.
34.
35. A look at global demographic situation suggests that
some countries have passed through high fertility and
high mortality condition to a low fertility and mortality
condition both aiming at low growth of population. These
two conditions are referred as old & new balance, with an
in-between period of imbalance as described below:
OLD BALANCE HIGH FERTILITY
HIGH MORTALITY
NEW
BALANCE
LOW FERTILITY
LOW MORTALITY
IMBALANCE
HIGH FERTILITY
LOW MORTALITY
(POOR HEALTH CONDITION ,
NOT COMPFORTABLE LIFE STYLE)
GOOD HEALTH CONDITIONS,
COMFORTABLE LIFE STYLE
(PERIOD OF RAPID NATURAL INCREASE)(PERIOD OF RAPID NATURAL INCREASE)
36. THIS GROWTH IS HELPFUL FOR UNDER
POPULATED NATIONS WHICH NEEDS
MORE MANPOWER, EXPANDING MARKETS ;
HOWEVER IT EVENTUALLY RESULTS IN
TOO FAST GROWTH OF POPULATION
LEADING TO ECONOMIC, POLITICAL AND
SOCIAL CHAOS. A NO. OF DEVELOPING
COUNTRIES e.g. PAKISTAN & MANY
AFRICAN COUNTRIES ARE IN THIS PHASE
OF DEMOGRAPHIC TRANSITION (LATE(LATE
EXPANDING)EXPANDING)
THIS GROWTH IS HELPFUL FOR UNDER
POPULATED NATIONS WHICH NEEDS
MORE MANPOWER, EXPANDING MARKETS ;
HOWEVER IT EVENTUALLY RESULTS IN
TOO FAST GROWTH OF POPULATION
LEADING TO ECONOMIC, POLITICAL AND
SOCIAL CHAOS. A NO. OF DEVELOPING
COUNTRIES e.g. PAKISTAN & MANY
AFRICAN COUNTRIES ARE IN THIS PHASE
OF DEMOGRAPHIC TRANSITION (LATE(LATE
EXPANDING)EXPANDING)
37. •Demographic gapDemographic gap is the difference betweenis the difference between
birth ratebirth rate andand death ratedeath rate that develops when athat develops when a
country undergoes demographic transitioncountry undergoes demographic transition
•In a demographic cycle, as the country developsIn a demographic cycle, as the country develops
and the living conditions improve, there is first aand the living conditions improve, there is first a
decrease in the death rate in the population Butdecrease in the death rate in the population But
the birth rate continues to remain at a high levelthe birth rate continues to remain at a high level
•This results in a demographic gap and aThis results in a demographic gap and a
resultant increase in the total size of populationresultant increase in the total size of population
•The demographic gap is maintained till the birthThe demographic gap is maintained till the birth
rate and death rates become equal and therate and death rates become equal and the
population size becomes stablepopulation size becomes stable
38.
39. There is some merit in including or considering
a Stage 5 today with a declining population
Population Pyramids ( Demographic Transition Models)
Stage 1 Stage 2 Stage 3 Stage 4
•Both birth rates and
Death rates are High
•population
growth rates are
slow but
• population Is
usually restored
Due to high birth
rate. Short life
expectancy
Scotland before
1760
New Guinea
Remote parts of
Amazonia
Scotland 1760 - 1830
Republic of Congo
•Population continues
to grow but at slower
rate. Low C Death Rate.
Dramatically declining
Crude Birth Rate.
Scotland 1870 -1950
Algeria, Tunisia
Morocco
IMPLICATIONS IMPLICATIONS IMPLICATIONS IMPLICATIONS
•Low Crude Birth Rate
and Crude Death Rate
Higher dependency ratio
and longer life expectancy
Crude Death Rate does
Rise slightly because of
The ageing population
Scotland today.
Japan, USA
High stationary
•Population starts
to grow at an
exponential rate due
to fall in Crude Death
Rate. More living In
middle age.
•Life expectancy rises
Infant mortality rate
falls.
Early expanding Late expanding Late stationary
40. According to Malthusian theory ofMalthusian theory of
population increasepopulation increase population increase
in geometric ratiogeometric ratio where as food supply increase
in arithmetic ratioarithmetic ratio. This disharmony would lead
to widespread povertypoverty and starvation which would
only be checked by natural occurrences such as
disease, high infant mortality, famine, war or
moral restraint. His main contribution is in the
agricultural sector. According to this theory there
are two steps to control the population,
PREVENTIVE AND POSITIVE CHECKPREVENTIVE AND POSITIVE CHECK.. preventive
means control in birth rate, use of different
methods to control birth and positive check means
natural calamities, war etc.
41. The population of Pakistan has gone up to 184 million this year from 119 million in 1990,
a report said. The latest report of the State Bank of Pakistan said the country’s
population has increased to 184 million this year with an annual growth rate of more
than two per cent, which makes up for more than 2.5 per cent of the world's population.
According to the report, the country’s contribution towards world’s population
increased from 2.25 percent in 1990 to 2.69 percent in 2010.
The News reported Friday that Pakistan has got the highest average fertility rate for
2005-10 along with the highest household size (6.8) and the second highest density after
India amongst the six most populous countries. India has a population of about 1.2
billion people.
“This is despite the fact that various governments have tried to contain high population
growth rate,” the bank report said.
The report went on to say that Pakistan is currently in the third stagePakistan is currently in the third stage
of demographic transition of moderate growthof demographic transition of moderate growth where birth rate and
death rate both decline and the pace of increase in population gets slow.
55. urban population: 36%urban population: 36% of total population (2010)of total population (2010)
rate of urbanization: 3.1% annual rate of changerate of urbanization: 3.1% annual rate of change
(2010-15 est.)(2010-15 est.)
Net migration Rate:Net migration Rate:
-2 migrant(s)/1,000 population (2012 est.)-2 migrant(s)/1,000 population (2012 est.)
country comparison to the world:country comparison to the world: 164164
56.
57. A community is called as Urban if :A community is called as Urban if :
Population is > 5000
75% of male population is working in
non-agricultural occupation
Population density is at least
400/sq.km
Population ≥ 10 millionPopulation ≥ 10 million megacitymegacity
58.
59.
60.
61. 70609 19333 3.2 2.2 16 11 7 43 42 27 51 60 65 3.5 36 4.2 3.3
Population
(thousands)
Population
annual growth
rate (%)
Crude death
rate
Crude birth
rate
Life
expectancy
Total
fertility
rate
% of
populati
on
urbanized
Average annual
growth rate of
urban population
(%)2007
under 18 under 5
1970–
1990
1990–
2007 1970 1990 2007 1970 1990 2007 1970 1990 2007 2007 2007
1970–
1990
1990–
2007
SOME DEMOGRAPHIC INDICATORS OF PAISTAN
187,342,721
(July 2011
est.)
1.573% 6.92
deaths/1,000
population
24.81
births/1,000
population
total
population:
65.99 Years
male: 64.18 yr
female: 67.9 yr
3.17
children
born/woman
36%
URBAN+RURAL
1.573%
(2011 est.)
66. Size = quantity of populationSize = quantity of population
Composition = quality of population
•Age
•Sex
•Literacy level
•Dependency ratio
•Occupation
•Socio-economic status
•Living conditions (housing)
•Marital status
•Language
•Family size
•Religion
•Culture etc
67. study of factors responsible for the changes (size,study of factors responsible for the changes (size,
composition, distribution) of population i.e.composition, distribution) of population i.e.
MarriagesMarriages
FertilityFertility
Child woman ratioChild woman ratio
MortalityMortality
MigrationMigration
Population ExplosionPopulation Explosion
High birth rateHigh birth rate
Low death rateLow death rate
Population stabilizationPopulation stabilization (either↑ death rate or ↓ birth rate, as(either↑ death rate or ↓ birth rate, as
death rate cannot be increase so birth rate has to be decreased bydeath rate cannot be increase so birth rate has to be decreased by
birth control & non birth control measures)birth control & non birth control measures)
68.
69.
70. •Decrease frequency of naturalDecrease frequency of natural
calamitiescalamities
•Advancements in medical sciencesAdvancements in medical sciences
•Health educationHealth education
•Better health care facilitiesBetter health care facilities
•Launching of various national healthLaunching of various national health
programsprograms
•International aid etcInternational aid etc
71. •Physical hazards (housing , environment, pollution)
•Psychological hazards
•Social hazards (alcoholism, broken homes, corruption,
divorces, drug abuse, gambling)
• Anti-social activities ( theft, murder, sex-crimes (rape-
prostitution) robbery, child-abuse, juvenile delinquency)
•Miscellaneous hazards (STDs, malnutrition, infections,
epidemics, HTN due to stress
Thus population explosion is not only a health problem but
a social, economic and demographic problem also )
72.
73. Age structure.
The distribution of a population according to age, usually by 5-year age groups.
Age-specific fertility rate.
The number of births during a year to women in a particular age group,
usually per 1,000 women in a 5-year age group at midyear.
Aging.
An increase in the proportion of the population in the older ages.
May also be measured as an increase in the median age of the population.
Births.
The number of live births occurring during a given calendar year.
Birth rate.
The average annual number of births during a year per 1,000 population at
midyear.
Also known as the crude birth rate.
Coale-Demeny model life tables.
A series of life tables depicting standard (or model) age patterns of mortality
and changes in those patterns at different overall levels of mortality.
These series were developed for four "regions" (North, East, South, and West)
based on the degree to which the patterns reflected data from those regions of
Europe.
The models were based on data from all continents, but primarily from Europe.
74. Cohort.
A group of individuals born in the same calendar year or group of years. Also
referred to as a birth cohort.
Components of change (of population).Fertility, mortality, and migration.
Crude death rate.
The average annual number of deaths during a year per 1,000 population at midyear.
Death rate.
The average annual number of deaths during a year per 1,000 population at
midyear. Also known as the crude death rate.
Dependency ratios.
A population’s dependency ratio, also known as the age dependency ratio
and the total dependency ratio, is the combined child population (people under
age 15) and elderly population (people ages 65 and above) per 100 people
ages 15-64 (people “of labor force age”).
The youth dependency ratio is the number of people under age 15 per 100
people ages 15-64.
The elderly, or old age, dependency ratio is the number of people 65 and over
per 100 people 15-64.
Dependency ratios are also referred to as support ratios.
Dependent age groups.
People under age 15 and people 65 years of age or older.
75. Gross reproduction rate per woman.
The average number of daughters that would be born alive to a hypothetical cohort
of women if they lived to the end of their reproductive years and if they
experienced the some age-specific fertility throughout their lives that women in
each age group experience in a given year or period of years.
Growth rate.
The average annual percent change in the population, resulting from a surplus (or
deficit) of births over deaths and the balance of migrants entering and leaving a
country. The rate may be positive or negative. Also known as population growth
rate or average annual rate of growth.
Infant mortality rate.
The number of deaths of infants under 1 year of age from a cohort of 1,000 live
births. Denoted 1q0 or IMR, it is the probability of dying between birth and exact
age 1.
Life expectancy at birth.
The average number of years a group of people born in the same year can be
expected to live if mortality at each age remains constant in the future.
Life table.
A statistical table that follows a hypothetical cohort of 100,000 people born at the
same time as they progress through successive ages, with the cohort reduced
from one age to the next according to a set of death rates by age until all
people eventually die.
Median age.
The midpoint age that separates the younger half of a population from the older half.
76. Midyear population.
The population estimate for July 1 of the given year.
Modern methods of contraception.
Condoms, IUD’s, pills, vaginal methods (spermicides, diaphragms, or caps),
injectables, and voluntary sterilization of a woman or her partner.
More developed countries.
The “more developed” countries and areas include all of North America and
Europe plus Japan, Australia, and New Zealand. This category matches
the “more developed” classification employed by the United Nations.
Natural increase.
The difference between the number of births and the number of deaths.
Net migration rate.
The difference between the number of migrants entering and those leaving a
country in a year, per 1,000 midyear population. May also be expressed in
percent. A positive figure is known as a net immigration rate and a negative
figure as a net emigration rate.
Net number of migrants.
The difference between the number of migrants entering and those leaving a
country in a year. A positive figure is known as net immigration and a
negative figure as net emigration.
77. Pandemic.
A global epidemic.
Population pyramid.
A graphical representation of the age and sex distribution of a population. Numbers
or proportions of males and females in each age group are plotted as horizontal
bars with the males on the left and females on the right. Pyramids may be
constructed to show single years of age or, as with the IDB pyramids, 5-year
age groups.
Rate of natural increase.
The difference between the crude birth rate and the crude death rate, but usually
expressed as a percent rather than per 1,000 population.
Sex ratio at birth.
The ratio of male to female births.
Total fertility rate.
The average number of children that would be born per woman if all women lived to
the end of their childbearing years and bore children according to a given set of
age-specific fertility rates.
Under-5 mortality.
Number of deaths of children under 5 years of age from a cohort of 1,000 live births.
Denoted 5q0, it is the probability of dying between birth and exact age 5.
Vital events.
Births and deaths.
78. Demographic Indicators 2012 1995 2005 2015 2025
Population
Midyear population (in thousands) 190,291 134,185 169,279 199,086 228,385
Growth rate (percent) 1.6 2.8 1.7 1.5 1.3
Fertility
Total fertility rate (births per woman) 3.1 5.7 4.0 2.8 2.2
Crude birth rate (per 1,000 population) 24 38 29 23 19
Births (in thousands) 4,624 5,155 4,941 4,495 4,380
79. Demographic Indicators 2012 1995 2005 2015 2025
Mortality
Life expectancy at birth(years) 66 60 64 67 71
Infant mortality rate (per 1,000 births) 61 96 76 56 40
Under 5 mortality rate(per 1,000 births) 81 137 103 73 51
Crude death rate (per 1,000 population) 7 11 8 6 6
Deaths (in thousands) 1,294 1,428 1,347 1,292 1,368
Migration
Net migration rate (per 1,000 population) -2 0 -4 -2 -0
Net number of migrants(in thousands) -381 32 -635 -307 -98
80.
81. Rate at which a given population is
expected to increase in a given period of
time. It is shown in % age per year .
GR= CBR – CDR
POPULATION MOMENTUM = POPULATION x GROWTH RATE
If Pakistan fertility declines to replacement level, even then
population of Pakistan will continue to grow for 40 years.
82.
83.
84.
85.
86.
87. Country Population Country Population
China 1,311 Pakistan 166
India 1,122 Bangladesh 147
US 299 Russia 142
Indonesia 225 Nigeria 135
Brazil 187 Japan 128
88.
89.
90.
91.
92.
93. Total number of children in a family
SexSex RatioRatio no of males / 100 females in a population
96. •The Net Reproduction RatioNet Reproduction Ratio is the expected
number of daughters, per newborn prospective
mother, who may or may not survive to and
through the ages of childbearing.
•A stable populationstable population, one that has had constant
crude birth and death rates for such long time that
the percentage of people in every age class
remains constant, or equivalently, the population
pyramid has an unchanging structure.
A stationary population, one that is both stable
and unchanging in size (the difference between
crude birth rate and crude death rate is zero).
97. According to the national
health policy , a sub-centre
caters to population in hilly and
tribal areas of ?
3000
99. A slum, as defined by the United Nations Human
Settlements Program (UN–HABITAT), is a run-down
area of a city characterized by substandard housing and
squalor and lacking in tenure security. According to the
United Nations, one billion people worldwide live in
slums.
100.
101.
102.
103.
104.
105.
106.
107.
108. Dependency Ratio :
= Children + Elderly X 100
Working Age
= Pop below 15 + 65 & above X 100
Pop 16 – 64 years
Dependency Ratio of Pakistan = 83.34%
Dependency Ratio of UK = 66.5 %
Dependency Ratio of Japan = 44 %
Sex Ratio: The overall sex ratio is simply the ratio of
males to females in the population & is calculated by taking the
number of males in a population & dividing it by the number of
females in the same population
Sex Ratio = Number of Males X 100
Number of Females
109. No. of live births in a specified period at a specific placeNo. of live births in a specified period at a specific place x 100x 100
No. of deaths at same place and periodNo. of deaths at same place and period
EXAMPLE:
No. of live births in city (x) = 450
No. of deaths in same city and period = 300
V.I. = 450 / 300 x 100 = 150
If V.I. = 100 (births = death population is neither increasing nor
decreasing)
If V.I. > 100 (births > deaths ; population increasing)
If V.I. < 100 (births < deaths ; population decreasing)
Population Density = No. of persons / sq. mile
Pakistan = 206
110. Population Change =
Mortality + Fertility + (net) Migration
Pt 1 = Pt₀ + (B – D) + (IM - OM)
Pt 1 = Future Population
Pt₀ = Present Population
Population change can be due to
1.Natural Reasons (NATURAL INCREASE)
Natural Increase = No. of live births (B) - No. of residents died (D);
[ B-D]
2.Migration
Net Migration = In migration (IM)– Out migration(OM) ; [IM – OM]
POPULATION GROWTH (PG) = NATURAL INCREASE + NET MIGRATION
PG = (B –D) + (IM – OM)
111. Pt1 = Pt₀ (1 + r)t
WHERE
Pt ₀ = present population
Pt
1
= future population
r = growth rate per person (in proportion)
t = no. of years between t₀ and t1
EXAMPLE : We want to calculate the population of a community in year
2012 (Pt1), Population of a community is 20,000 in year
2006 (Pt0 ) and annual GR is 3%
P(2012) = P (2006) (1+ 3 / 100)6
= 20000 (1+ 3 /100 )6
= 20000(1+0.030)6
= 23880
OR
Pt = Pt [ 1 + (GR / 100 x No. of years)]
114. Time taken(approx.) for a population to
double(approx.). Because population
increase is on a compound interest
formula. 1% / yr increase would cause the
population to double in about 70 yrs.(by
interpretation, observation and collection
of last census data) If the population is
increasing at 3% / yr. Then the doubling
time will be 70 ÷3 = 23.3 yrs.
PDT = 70 / GR
PDT of Pakistan= 70/2.8 = 25 yrs. approx
PDT of World = 70/1.3= 50 yrs. approx
115. Is achieved, when a couple has two births
during their reproductive life, just replace to
themselves
At a community scale, the replacement level
is considered when there are on an average
2.1 births / woman, to compensate for
expected deaths.
116. •The replacement level fertility, the average
number of children a woman must have in order to
replace herself with a daughter in the next
generation. For example the replacement level
fertility in the US is 2.11. This means that 100
women will bear 211 children, 103 of which will be
females. About 3% of the alive female infants are
expected to decease before they bear children,
thus producing 100 women in the next generation.
•The gross reproduction rate, the number of
daughters who would be born to a woman
completing her reproductive life at current age-
specific fertility rates.
117. Is characteristic of population
growth when sharp decline in
births does not bring in an
immediate reduction in natural
increase
118.
119. 119
Currently data on population is utilized/used
by;
• Businesses
• Governments
• Academicians
120. Businesses use population data to;
Identify potential markets & places to
run advertisements (retail businesses).
Determine whether an area considered
for a plant/factory has a sufficient labour
force.
They also study population shifts for
changes that could affect market for
their products, (manufacturing
businesses).
121. Governments at all levels also utilize population data for
the following purposes:
1. For long range planning of various
departments & government organizations.
2. For projecting the kind of public services that
will be needed at various points in the future.
3. For monitoring changes in society such as
decline or improvement in health, shifts in the
structure of the family, alterations in ethnic
relationships etc.
122. For health planning. Demographic data can assist in helping
to plan by describing the following:
Uptake of health services in a country or an area.
The usual presentation of illnesses in an area/country.
By identification of the population’s perception of illness
& disease.
By identifying the lifestyle & cultural practices of the
population.
By the kind of encounters that the population has with the
services.
By identifying the patterns of disease in the population.
By identifying the kind of alternate medicine being utilized
by the population.
123. Academicians use demographic data:
To improve understanding of human
society by analyzing the consequences of
social political & economic change brought
about by population alterations. In so doing
they
Help to forecast the future of the society.
Assist governments in planning purposes.
124. Population-growth rate
the rate at which a population grows each year
(given period of time) % age / yr.
Rate of Natural Increase (the rate at which a
population grows each year based solely on
births and deaths, not migration)
Per Capita Income (the average amount of
money each person in a country/region/home
earns per year).
PCI= Total income .
Total population
125. Census is the procedure of
systematically acquiring and recording
information (massive country wide operation to
consume enormous manpower and other
resources) about the members of a given
population. It is a regularly occurring and official
count of a particular population. The term is used
mostly in connection with national population
and door to door censuses' (to be taken every 10
years according to United Nations
recommendations), agriculture, and business
censuses. The term itself comes from Latin:
during the Roman Republic the census was a list
which kept track of all adult males fit for military
126. Earliest record of census= 4000 BC in Babylonia, 3000
BC in china, 2500 BC in Egypt
Modern line ( scope extended beyond head counting)
Canada in 1666 first conducted census followed by US
1790 and England 1801, India country wide operation
started in 1881
De Facto (factually)De Facto (factually)(person is treated as a resident(person is treated as a resident
where he is available at the time of contact, even hewhere he is available at the time of contact, even he
may be actually resident of some other place)may be actually resident of some other place)
De Jure (legally)De Jure (legally)(person is treated as a resident where(person is treated as a resident where
he actually belongs to, even he may be residing elsehe actually belongs to, even he may be residing else
where)where)
India de Facto till 1931 and 1941 onwards de jureIndia de Facto till 1931 and 1941 onwards de jure
127. The first Pakistan Census after the proclamation
of independence of Pakistan was conducted in
1951. It was decreed that censuses have to be
carried out once in 10 years. The second census
was conducted in 1961. However the third one
was conducted in 1972 because of war with India.
The fourth census was held in 1981.The fifth
census was conducted delayed in March 1998.
The sixth census of Pakistan is planned in October
2008. Pakistan's estimated population inPakistan's estimated population in
2011 is over 187 million2011 is over 187 million
128. ERRORS (limitations) of Census
Infants are generally under enumerated
Many persons do not know their exact age
Old persons tend to add years to their actual age
Information about handicapped persons is
incomplete
Information about work status is distorted
USES
Provision of demographic, social and economic data
of country, helps to plan health & welfare programs.
Information on composition, size & distribution of
population, population trend, quality of life
Helps to estimate mid-year population, pop. policies
129. Process of recording vital events that occur
in a population from time to time; events
registered relate to births, deaths &
marriages.
Census and VR are inter related if census
gives a snapshot VR gives a motion picture
of that population by recording changes on
continuous basis.
130. •TheThe crude birth rate (CBR)crude birth rate (CBR),, the annual number ofthe annual number of
live births per 1000 people in specific area & timelive births per 1000 people in specific area & time
•TheThe general fertility rategeneral fertility rate,,(GFR)(GFR) the annual numberthe annual number
of live births per 1000 women of childbearing age (oftenof live births per 1000 women of childbearing age (often
taken to be from 15 to 49 years old, but sometimes from 15taken to be from 15 to 49 years old, but sometimes from 15
to 44)to 44) inin specific area & timespecific area & time
•age-specific fertility rates (ASFR)age-specific fertility rates (ASFR),, the annualthe annual
number of live births per 1000 women in particular agenumber of live births per 1000 women in particular age
groups (usually age 15-19, 20-24 etc.)groups (usually age 15-19, 20-24 etc.) in specific area &in specific area &
timetime
•TheThe crude death rate(CDR)crude death rate(CDR),, the annual numberthe annual number
of deaths per 1000 people in specific area & timeof deaths per 1000 people in specific area & time
131. • TheThe infant mortality rate (IMR)infant mortality rate (IMR),, the annualthe annual
number of deaths of children less than 1 year old per 1000number of deaths of children less than 1 year old per 1000
live births in specific area & timelive births in specific area & time
• TheThe expectation of lifeexpectation of life (or life expectancy(or life expectancy),), thethe
number of years which an individual at a givennumber of years which an individual at a given
age could expect to live at present mortality levels.age could expect to live at present mortality levels.
in specific area & timein specific area & time
• TheThe total fertility rate (TFR)total fertility rate (TFR),,the number of livethe number of live
births per woman completing her reproductivebirths per woman completing her reproductive
life, if her childbearing at each age reflectedlife, if her childbearing at each age reflected
current age-specific fertility rates in specific areacurrent age-specific fertility rates in specific area
& time& time
132. According to the Encyclopedia of International
Development, the term demographic trap is used by
demographers "to describe the combination of high
fertility (birth rates) and declining mortality (death
rates) in developing countries, resulting in a period of
high population growth rate (PGR).“
High fertility combined with declining mortality
happens when a developing country moves through
the demographic transition of becoming developed.
133. Actuarial scienceActuarial science is the discipline that
applies mathematical and statistical
methods to assess riskassess risk in the insurance
and finance industries
In actuarial science, a LIFE TABLELIFE TABLE (also called
a mortality table or actuarial table) is a table
which shows, for each age, what the probability is
that a person of that age will die before his or her
next birthday. From this starting point, a number
of inferences can be derived.
the probability of surviving any particular year of
age
134. remaining life expectancylife expectancy for people at
different ages
Life tables can be constructed using projections of
future mortality rates, but more often they are a
snapshot of age-specific mortality rates in the
recent past, and do not purport to be projections.
For various reasons, such as advances in medicine,
age-specific mortality rates vary over time.
Life tables are usually constructed separately for
men and for women because of their substantially
different mortality rates. Other characteristics
can also be used to distinguish different risks,
such as smoking status, occupation, and socio-
economic class.
137. POPULATION STRUCTURE
The population pyramid displays the age
and sex structure of a country or given area
Population in
Five Year
Age bands
Usually, but not always,
In % to make for easier
comparisons
between countries
OLD
DEPENDANTS
ECONOMICALLY
ACTIVE
YOUNG
DEPENDANTS
FEMALES
To the rightMALES
To the left
142. THIS GROWTH IS HELPFUL FOR UNDER
POPULATED NATIONS WHICH NEEDS
MORE MANPOWER, EXPANDING MARKETS ;
HOWEVER IT EVENTUALLY RESULTS IN
TOO FAST GROWTH OF POPULATION
LEADING TO ECONOMIC, POLITICAL AND
SOCIAL CHAOS. A NO. OF DEVELOPING
COUNTRIES e.g. PAKISTAN & MANY
AFRICAN COUNTRIES ARE IN THIS PHASE
OF DEMOGRAPHIC TRANSITION (LATE(LATE
EXPANDING)EXPANDING)
THIS GROWTH IS HELPFUL FOR UNDER
POPULATED NATIONS WHICH NEEDS
MORE MANPOWER, EXPANDING MARKETS ;
HOWEVER IT EVENTUALLY RESULTS IN
TOO FAST GROWTH OF POPULATION
LEADING TO ECONOMIC, POLITICAL AND
SOCIAL CHAOS. A NO. OF DEVELOPING
COUNTRIES e.g. PAKISTAN & MANY
AFRICAN COUNTRIES ARE IN THIS PHASE
OF DEMOGRAPHIC TRANSITION (LATE(LATE
EXPANDING)EXPANDING)
Notas do Editor
Statistics is the science of the collection, organization, and interpretation of data Spatial = relating to space
Temporal = relating to time
Each bar represent 5 years age group
Decrease in size of bar means decrease in respective age group population and it can occur due to many reasons
It typically consists of two back-to-back bar graphs, with the populationnnnnnnn
Arithmetic = 1,2,3,4,5 or 2,4,6,8, 3, 6, 9, 12 sequence
Geometric= 1,2,4,8,16,32 16,8,4,2,1,1/2 ratio difference
Each bar represent 5 years age group
Decrease in size of bar means decrease in respective age group population and it can occur due to many reasons
It typically consists of two back-to-back bar graphs, with the populationnnnnnnn
