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FIGURE 3. Value of U.S. Merchandise Trade by Land, Water, and Air Gateways: 1990–2003

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¹ Includes truck, rail, pipeline, and miscellaneous surface modes.

² Includes purchased vehicles such as aircraft or boats moving from manufacturer to customer where the vehicle itself is the shipment, pedestrians carrying freight, and miscellaneous.

SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, based on total trade, from U.S. International Trade Commission, USITC Interactive Tariff and Trade Dataweb, available at http://dataweb.usitc.gov/as of Sept. 15, 2004.