Data for Figure 3,,,,,, Modal Shares of U.S. Merchandise Trade with NAFTA Partners by ,,,,,, Value: 1997-2000,,,,,, ,1997,1998,1999,2000,, Truck, 68 , 70 , 69 , 66 ,, Rail, 15 , 14 , 14 , 14 ,, Pipeline, 3 , 2 , 2 , 4 ,, Air, 6 , 6 , 6 , 7 ,, Water, 5 , 4 , 4 , 5 ,, Other land modes*, 4 , 4 , 4 , 4 ,, *Includes unknown and miscellaneous modes.,,,,,, "SOURCES: U.S. Department of Transportation, Bureau of Transportation Statistics, special ",,,,,, "tabulation, April 2001; based on: total trade, air and water—U.S. Department of Commerce,",,,,,, "U.S. Census Bureau, Foreign Trade Division, FT920 U.S. Merchandise Trade (Washington, DC:",,,,,, "Various years); all land modes—U.S. Department of Transportation, Bureau of Transportation" "Statistics, Transborder Surface Freight Data."