SOURCES: All except as noted—U.S. Department of Transportation, Bureau of Transportation Statistics, "Government Transportation Financial Statistics Searchable Database," available at http://www.bts.gov, as of February 2003. State and local portion for 2000—U.S. Department of Commerce, U.S. Census Bureau, "State and Local Government Finances," available at ftp://ftp2.census.gov/pub/outgoing/govs/Finance/, as of February 2003. Chain-type price index—U.S. Department of Commerce, Bureau of Economic Analysis, "National Income and Product Accounts Tables," table 7.1, available at http://www.bea.doc.gov/bea/dn/nipaweb/, as of February 2003.