Figure 1,,,,,,,, "Frequency of Bicycle Use by Gender, Income, and Age",,,,,,,, (millions),,,,,,,, Days,Female,Male,,"< $50,000","$50,000+",,18 to 44 years,45+ years 1-2 days/month,4.5,6.4,,4.2,5.7,,7.4,3.4 3-5 days/month,4.6,6.6,,3.7,6.4,,7.1,4.0 6 or more days/month,3.8,6.9,,4.5,4.7,,6.9,3.5 ,,,,,,,, "SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, Omnibus Household Survey, November 2001 through October 2002",,,,,,,, ,,,,,,,, ,,,,,,,, ,,,,,,,,