Figure 10 U.S. International Air Cargo Availability and Use (Freight revenue ton-miles by U.S. air carriers: 1980-2001)

Figure 10
U.S. International Air Cargo Availability and Use
(Freight revenue ton-miles by U.S. air carriers: 1980-2001)

(Billions of ton-miles)

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  Available ton-miles Unused ton-miles Revenue ton-miles
1980 6.88 3.58 3.3
1981 6.59 3.37 3.21
1982 6.75 3.46 3.29
1983 6.47 3.08 3.39
1984 7.1 3.33 3.77
1985 8.05 4.21 3.84
1986 8.61 4.05 4.57
1987 9.49 4.02 5.47
1988 11.73 5.37 6.36
1989 13.57 6.28 7.29
1990 15.27 8.03 7.24
1991 16.64 9.44 7.2
1992 17.36 10 7.36
1993 18.5 10.2 8.29
1994 20.74 10.91 9.83
1995 22.67 11.97 10.7
1996 24.58 12.75 11.84
1997 27.34 13.52 13.82
1998 29.27 15.48 13.79
1999 30.92 16.34 14.58
2000 32.2 16.58 15.62
2001 32.45 18.06 14.4

NOTE: A revenue ton-mile is equal to 1 ton that is carried 1 mile and measures utilization of air freight services. For those planes that carry both freight and passengers, available freight ton-miles are calculated by subtracting available seat-miles times 0.1 from total available ton-miles. The data include both transborder and foreign flights by U.S. carriers, but do not include any flights by foreign carriers. The drop in 2001 reflects the impact of the terrorist attacks of Sept. 11, 2001, on aviation, including several days in which commercial air operations were suspended.

SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, Office of Airline Information, Air Carrier Traffic Statistics (Washington, DC: May 2002).