Figure 1,,,,,,,,,,,,,
Growth in Domestic Freight Ton-Miles: 1975–1999,,,,,,,,,,,,,
(Index: 1975 = 1.0),,,,,,,,,,,,,
Year,Air carrier,Intercity truck,Class I rail,Water ,Pipeline,,,,,,,,
1975,1.0,1.0,1.0,1.0,1.0,,,,,,,,
1980,1.3,1.2,1.2,1.6,1.2,,,,,,,,
1985,1.5,1.3,1.2,1.6,1.1,,,,,,,,
1990,2.6,1.6,1.4,1.5,1.2,,,,,,,,
1991,2.6,1.7,1.4,1.5,1.1,,,,,,,,
1992,2.8,1.8,1.4,1.5,1.2,,,,,,,,
1993,3.1,1.9,1.5,1.4,1.2,,,,,,,,
1994,3.4,2.0,1.6,1.4,1.2,,,,,,,,
1995,3.6,2.0,1.7,1.4,1.2,,,,,,,,
1996,3.7,2.1,1.8,1.4,1.2,,,,,,,,
1997,3.9,2.3,1.8,1.2,1.2,,,,,,,,
1998,4.0,2.3,1.8,1.2,1.2,,,,,,,,
1999,4.0,2.4,1.9,1.2,1.2,,,,,,,,
"SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics 2001 (Washington, DC: 2002).",,,,,,,,,,,,,