"Table A2 Airline Freight, Express, and Mail Revenue Ton-Miles",,,,,,,,,,,,,,
(billions),,,,,,,,,,,,,,
,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003p
"Air (improved BTS)1,2",10.420,9.960,10.990,11.540,12.030,12.720,13.760,13.900,14.140,14.500,15.810,13.288,13.837,15.096
Air (NTS)3,9.064,8.860,9.820,10.675,11.803,12.520,12.861,13.601,13.840,14.202,14.983,13.088,,
Air (Eno)4,10.420,9.960,10.990,11.540,12.030,12.720,13.760,13.900,14.140,14.500,15.810,15.180,,
"1 U.S. Department of Transportation, Bureau of Transportation Statistics, Office of Airline Information, Air Carrier Traffic Statistics Monthly (Washington, DC: 1990–2003), Freight, Express, and Mail Revenue Ton-Miles table, p. 2, line 3.",,,,,,,,,,,,,,
"2 Federal Aviation Administration, supplementary statistics.",,,,,,,,,,,,,,
"3 U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics (Washington, DC: 2003), table 1-44.",,,,,,,,,,,,,,
"4 Eno Transportation Foundation, Transportation in America (Washington, DC: 2002).",,,,,,,,,,,,,,
Key: p = preliminary.,,,,,,,,,,,,,,
,,,,,,,,,,,,,,