|
Sources: U.S. data: Vehicles: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics 2000, Table VM-1, and earlier annual editions. Population: U.S. Department of Commerce, Bureau of the Census Web site Time Series of National Population Estimates: April 1, 2000 to July 1, 2001 Other countries/regions: Energy Information Administration, International Energy Outlook 2002, DOE/EIA-0484(2002), p. 256. |