Figure 9,,
U.S. International Air Operating Revenues and Revenue Ton-Miles: 1980–2001,,
(Index: 1980 = 100),,
,Freight revenue ton-miles,Freight Operating revenues
1980,100,100
1981,97.4,97.4
1982,99.6,98
1983,102.8,98.6
1984,114.3,115.4
1985,116.3,111.9
1986,138.4,142.8
1987,165.7,175.3
1988,192.6,211.4
1989,220.9,237.8
1990,219.3,255.3
1991,218.1,307.3
1992,223.1,292.2
1993,251.2,315.5
1994,297.7,352.4
1995,324.2,390.2
1996,358.6,454.7
1997,418.7,503.1
1998,417.8,514.2
1999,441.6,576.1
2000,473.3,610.4
2001,436.2,614.5
NOTE: A revenue ton-mile is equal to one ton carried one mile and measures utilization of air freight services. Data reflect U.S. carriers only.,,
"SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, Office of Airline Information data, May 2002.",,