NOTES: Amtrak data are not
available prior to 1993. All dollar amounts are chained 1996 dollars.
Current dollar amounts are available in appendix B and were adjusted to
eliminate the effects of inflation over time.
SOURCE: U.S. Department
of Transportation, Bureau of Transportation Statistics, National Transportation Statistics 2002 (Washington, DC: 2002), table 3-15b, also available at http://www.bts.gov.
