NOTES: To eliminate the effects of
inflation over time, the Bureau of Transportation Statistics converted current
dollars (see table 9-4b in appendix B) to chained 2000 dollars. Definitions of subsectors are in table 9-5 in appendix B.
SOURCE: U.S. Department of
Transportation, Research and Innovative Technology Administration, Bureau of
Transportation Statistics, calculations using data from U.S. Department of
Commerce, Bureau of Economic Analysis, “Gross Domestic Product by Industry,”
available at http://www.bea.gov/, as of January 2005.