NOTES: Amtrak data are not available prior to 1993. Current dollar amounts (see tables 6-3 and 6-4 in
appendix B) were converted to chained 2000 dollars by the Bureau of Transportation Statistics to
eliminate the effects of inflation over time.
SOURCES: U.S. Department of Transportation (USDOT), Bureau of Transportation Statistics (BTS),
National Transportation Statistics 2003, table 3-15a and 3-15b, available at http://www.bts.gov,
as of May 2004. 2002— USDOT, BTS, personal communication, May 2004.
