Tourism is travel for leisure purposes or to places outside one's usual environment for less than a year. In 2010, there were over 940 million international tourist arrivals. However, international travel demand suffered in 2008-2009 due to the global recession, with a 4% decline in international tourist arrivals in 2009. The term "tourism" derives from the Latin word "tornare", meaning to turn around a center point, and the movement of tourists is like a circular journey that returns to the starting point.