Figure 4
Freight Transportation and the U.S. Economy: 1970–2002
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![Figure 4 - Freight Transportation and the U.S. Economy: 1970–2002. Share of Gross Domestic Product by Major Type of Product: 1970-2002 (Percent). If you are a user with disability and cannot view this image, use the table version. If you need further assistance, please call 800-853-1351 or email answers@bts.gov.](https://webarchive.library.unt.edu/eot2008/20090115025537im_/https://www.bts.gov/publications/freight_shipments_in_america/images/figure_04a.gif)
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![Figure 4 - Freight Transportation and the U.S. Economy: 1970–2002. Freight Ton-Miles and U.S. Real Gross Domestic Product: 1970-2002 (Index 1970 = 100). If you are a user with disability and cannot view this image, use the table version. If you need further assistance, please call 800-853-1351 or email answers@bts.gov.](https://webarchive.library.unt.edu/eot2008/20090115025537im_/https://www.bts.gov/publications/freight_shipments_in_america/images/figure_04b.gif)
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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