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a Estimates of pipeline exclude shipments of crude petroleum. b Includes a combination of parcel, postal, and courier services; truck and rail; and other intermodal combinations, including truck and water and rail and water. Excludes truck and air combination, which is added to air transportation. KEY: S = Estimate does not meet publication standards due to high sampling variability or poor response quality. NOTE: The data presented in this table exclude shipments from the following establishments classified in the North American Industry Classification System (NAICS) as: farms, forestry, logging, fisheries, construction, publishing, and crude petroleum production; households; governments; and most retail and service businesses. It also excludes most imports and commodities shipped from a foreign location to another foreign destination, passing through the United States. SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau,2002 Economic Census:Transportation Commodity Flow Survey, Preliminary report, December 2003. ![]() |
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