SOURCES: Fatalities—U.S. Department of Transportation (USDOT), Bureau of Transportation Statistics, National Transportation Statistics 2002 (Washington, DC: 2002), table 2-1 revised, available at http://www.bts.gov/, as of January 2004. Transit—USDOT, Federal Transit Administration, National Transit Database, Safety and Security Newsletter (Washington, DC: Spring 2003) available at http://transit-safety.volpe.dot.gov/Data/NTDNewsletters/Default.asp, as of January 2004. Vehicle-miles—USDOT, Federal Highway Administration, Highway Statisitics 2002 (Washington, DC: 2003), table VM-1. Waterborne recreational boating—U.S. Department of Homeland Security, U.S. Coast Guard, Office of Boating Safety, Boating Statistics (Washington, DC: December 2003), available at http://www.uscgboating.org, as of January 2004. Population—U.S. Department of Commerce, U.S. Census Bureau, Monthly Population Estimates for the United States, available at http://eire.census.gov/popest/data/national/tables/NA-EST2003-01.php, as of January 2004.