Twitter has grown significantly since its founding in 2006. It currently has around 200 million accounts, with users sending about 50 million tweets per day. The number of Twitter employees has also increased substantially, from 8 in 2008 to over 400 now. Most Twitter users are between the ages of 20-24 and located in North America, and the number of friends a user has correlates somewhat to the number of followers they have. The peak hours for tweets are around 1pm daily.