"TABLE 5. Value of U.S. Merchandise Trade by Land, Water, and Air Gateways: 1990–2003",,,,,
"(Current $, billions)",,,,,
Year,"Total U.S.
international
merchandise trade",U.S. total land trade,U.S. total water trade,U.S. total air trade,Other and unknown
1990,889,204,434,201,50
1991,910,210,435,209,56
1992,981,232,463,226,60
1993,"1,046",258,477,255,56
1994,"1,176",312,517,293,54
1995,"1,328",338,573,355,62
1996,"1,420",377,591,382,70
1997,"1,560",426,626,433,76
1998,"1,594",452,614,442,86
1999,"1,720",501,632,496,92
2000,"2,000",576,740,593,91
2001,"1,870",547,718,519,86
2002,"1,857",541,729,498,89
2003,"1,983",563,811,523,86
"Percent change,
1990–2003",123.1,176.2,86.8,159.9,73.4
"Average annual growth rate, 
1990-2003",6.4,8.1,4.9,7.6,4.3
"NOTE: Other and Unknown 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, from U.S. Department of Commerce, U.S. Census Bureau, Foreign Trade Division, U.S. Exports of Merchandise CD and U.S. Imports of Merchandise CD, various annual December CDs.",,,,,