Figure 4
Freight Transportation and the U.S. Economy: 1970–2002
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Table Version
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CSV |
Table Version
NOTE: GDP can be classified into services, goods,
and structures.
Services include government consumption expenditures, which are for services
(such as education and national defense) produced by government.
Structures include fixed assets such as roads, railroad tracks, airports, power
plants, and medical buildings.
Goods include all goods consumed as final demand.
SOURCE: GDP data—U.S. Department of Commerce, Bureau of Economic Analysis, National
Income and Products Account (NIPA), available at
http://www.bea.gov/bea/dn/nipaweb/index.asp, as of February 2004.
Ton-miles data—U.S. Department of Transportation, Bureau of Transportation Statistics, National
Transportation Statistics (online: February 2004).
Population data—U.S. Department of Commerce, Census Bureau, available at
http://eire.census.gov/popest/archives/pre1980/popclockest.txt, as of February
2004.
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