|U.S. total land trade1||22.9||28.4|
|U.S. total water trade||48.9||40.9|
|U.S. total air trade||22.7||26.4|
|Other and unknown2||5.6||4.3|
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.