 An estimated 3.3% of the District's residents biked to work at least one day during 2010, and by 2008 the city had the sixth-highest percentage of bike commuters in the United States.The city's primary bicycle sharing system is Capital Bikeshare, which began services in September 2010.Washington, D.C., formerly had the largest bike sharing service in the U.S. with 1,100 bicycles and 110 rental locations (New York City's CitiBike program is now larger).