Table C-6,,, Value of U.S. International Merchandise Trade by Mode of Transportation: 2000 and 2001,,, (Millions of dollars),,, Mode,2000,2001,"Percentage change, 2000–2001" Imports and exports,,, Water,"739,963","718,448",–2.9 Air,"592,999","518,602",–12.5 Truck,"428,700","395,425",–7.8 Rail,"94,198","92,617",–1.7 Pipeline,"23,592","26,428",12 Other and unknown,"117,855","121,466",3.1 Total,"1,997,306","1,872,985",–6.2 U.S. imports,,, Water,"540,895","519,607",–3.9 Air,"308,642","267,107",–13.5 Truck,"216,485","203,507",–6.0 Rail,"70,755","69,255",–2.1 Pipeline,"23,129","25,910",12 Other and unknown,"56,982","56,573",–0.7 Total,"1,216,888","1,141,959",–6.2 U.S. exports,,, Water,"199,069","198,841",–0.1 Air,"284,356","251,494",–11.6 Truck,"212,215","191,918",–9.6 Rail,"23,442","23,362",–0.3 Pipeline,463,517,11.7 Other and unknown,"60,873","64,894",6.6 Total,"780,419","731,026",–6.3 "SOURCES: U.S. Department of Transportation, Bureau of Transportation Statistics, May 2002; based on: total, water, and air data—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, December 2001; truck, rail, pipeline, and other and unknown data—U.S. Department of Transportation, Bureau of Transportation Statistics, Transborder Surface Freight Data, 2001; and special tabulations.",,,