Table 4-21M. Energy Intensity of Certificated Air Carriers, All Servicesa

Table 4-21M. Energy Intensity of Certificated Air Carriers, All Servicesa

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  1960 1965 1970 1975 1980 1985 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
Aircraft-kilometers (millions)                               
Domestic operations 1,381 1,825 3,328 3,135 4,060 4,902 6,378 6,202 6,429 6,690 7,049 7,450 7,743 R7,904 8,097 8,330
International operations 293 457 764 607 645 668 1,223 1,299 1,455 1,547 1,577 1,606 1,679 1,793 1,917 1,926
Available seat-kilometers (millions)R                               
Domestic operations 84,040 152,545 343,048 388,306 556,879 717,489 906,167 874,902 897,998 919,724 942,173 971,912 1,008,077 1,030,495 1,045,178 1,105,525
International operations 21,480 47,529 83,622 99,335 139,220 164,094 274,088 276,101 313,475 322,112 320,088 326,955 335,842 349,088 361,665 371,613
Passenger-kilometers (millions)R                               
Domestic operations 49,177 83,504 167,609 211,996 322,335 435,464 547,550 535,214 559,942 569,994 609,926 635,222 684,932 712,361 733,539 771,986
International operations 13,367 27,019 44,358 50,022 87,489 105,926 189,412 185,701 210,216 218,079 225,938 234,881 246,338 258,749 263,379 276,660
Fuel consumed (million liters)                               
Domestic operations 7,397 14,721 29,742 28,610 34,432 R38,289 R47,049 R43,555 R44,528 R45,270 R47,227 48,499 R49,918 51,709 52,530 54,518
International operations 2,143 4,845 8,491 7,378 7,336 R9,418 R15,002 R14,915 R15,596 R15,569 R16,319 R17,076 R17,632 18,791 19,631 19,873
Seats per aircraftR                                
Domestic operations 60.9 83.6 103.1 123.9 137.1 146.4 142.1 141.1 139.7 137.4 133.7 130.5 130.2 131.1 129.1 132.7
International operations 73.3 104.0 109.4 163.7 215.7 245.7 224.1 212.6 215.5 208.7 203.0 203.6 200.1 194.7 188.7 192.9
Seat-kilometer per literR                               
Domestic operations 11 10 12 14 16 19 19 20 20 20 20 20 20 20 20 20
International operations 10 10 10 13 19 17 18 19 20 21 20 19 19 19 18 19
Energy intensiveness (1000 Joules/passenger-kilometer)b, R                               
Domestic operations 5,664 6,639 6,682 5,082 4,022 3,311 3,236 3,064 2,994 2,991 2,916 2,875 2,744 2,720 2,705 2,659
International operations 6,036 6,753 7,208 5,554 3,158 3,348 2,982 3,024 2,794 2,689 2,730 2,738 2,695 2,735 2,807 2,705
Load factor (%)                               
Domestic operations R58.5 R54.7 R48.9 R54.6 R58.0 R60.7 R60.4 R61.2 R62.4 R62.0 R64.7 R65.4 67.9 69.1 70.2 69.8
International operations R62.2 R56.8 R53.0 54.4 R62.8 R64.6 R69.1 R67.3 R67.1 R67.6 R70.6 71.8 73.3 74.1 R72.8 74.4

a U.S. owned carriers only. Operation of foreign-owned carriers in or out of the United States not included.
b Calculation based on unrounded figures not shown here.

KEY: R = revised.

NOTES: Aircraft-kilometers includes all four air-carrier groups (majors, nationals, large regionals, and medium regionals), scheduled and charter,  passenger, and all-cargo. Fuel consumed includes majors, nationals, and large regionals, scheduled and charter, passenger, and all-cargo. Passenger-kilometers includes all four air-carrier groups, scheduled and charter, passenger service only. International operations include operations outside the United States, including those between the United States and foreign countries and the United States and its territories or possessions.
Domestic and international load factor values for 1999 are derived by calculation.
Heat equivalent factor used for joules conversion is 37,626,700 joules/liter.

SOURCES:
Aircraft-kilometers, available seat-kilometers, passenger-kilometers, and load factor:
1960-80: Air Transport Association, Internet site http://www.air-transport.org/public/industry, as of July 5, 2000.
1985-98: U.S. Department of Transportation, Bureau of Transportation Statistics, Office of Airline Information, Air Carrier Traffic Statistics (Washington DC: Annual December issues).
Fuel consumed:
1960-99: U.S. Department of Transportation, Bureau of Transportation Statistics, Office of Airline Information, Internet site http://www.bts.gov/oai/fuel/fuelyearly.html, as of July 5, 2000. Seats per aircraft, seat-kilometers per liter, and energy intensiveness: Derived by calculation.