Table 4-21: Energy Intensity of Certificated Air Carriers, All Servicesa
Table 4-21: Energy Intensity of Certificated Air Carriers, All Servicesa
| 1960 | 1965 | 1970 | 1975 | 1980 | 1985 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | (R) 2001 | (R) 2002 | (R) 2003 | (R) 2004 | (R) 2005 | (R) 2006 | 2007 | 2008 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Aircraft-miles (millions) | |||||||||||||||||||||||||
| Domestic operations | 858 | 1,134 | 2,068 | 1,948 | 2,523 | 3,046 | 3,963 | 3,854 | 3,995 | 4,157 | 4,380 | 4,629 | 4,811 | 4,911 | 5,035 | 5,332 | 5,664 | 5,333 | 5,490 | 5,979 | 6,449 | 6,601 | 6,504 | 6,629 | 6,344 | 
| International operations | 182 | 284 | 475 | 377 | 401 | 415 | 760 | 807 | 904 | 961 | 980 | 998 | 1,043 | 1,114 | 1,192 | 1,225 | 1,282 | 1,181 | 1,115 | 1,093 | 1,208 | 1,314 | 1,413 | 1,483 | 1,520 | 
| Available seat-miles (millions) | |||||||||||||||||||||||||
| Domestic operations | 52,220 | 94,787 | 213,160 | 241,282 | 346,028 | 445,826 | 563,065 | 543,638 | 557,989 | 571,489 | 585,438 | 603,917 | 626,389 | 651,918 | 662,313 | 699,330 | 727,033 | 695,200 | 678,479 | 689,199 | 741,677 | 752,482 | 740,909 | 757,604 | 729,073 | 
| International operations | 13,347 | 29,533 | 51,960 | 61,724 | 86,507 | 101,963 | 170,310 | 171,561 | 194,784 | 200,151 | 198,893 | 203,160 | 208,682 | 228,689 | 237,538 | 242,981 | 254,048 | 235,311 | 215,738 | 204,741 | 229,788 | 250,252 | 264,624 | 279,574 | 291,032 | 
| Passenger-miles (millions) | |||||||||||||||||||||||||
| Domestic operations | 30,557 | 51,887 | 104,147 | 131,728 | 200,289 | 270,584 | 340,231 | 332,566 | 347,931 | 354,177 | 378,990 | 394,708 | 425,596 | 450,612 | 463,262 | 488,357 | 516,129 | 486,506 | 483,409 | 505,226 | 557,892 | 583,758 | 588,455 | 607,546 | 583,506 | 
| International operations | 8,306 | 16,789 | 27,563 | 31,082 | 54,363 | 65,819 | 117,695 | 115,389 | 130,622 | 135,508 | 140,391 | 145,948 | 153,067 | 169,356 | 172,255 | 180,269 | 192,798 | 178,343 | 171,886 | 168,601 | 194,174 | 210,883 | 221,002 | 234,100 | 239,290 | 
| Fuel consumed (million gallons) | |||||||||||||||||||||||||
| Domestic operations | 1,954 | 3,889 | 7,857 | 7,558 | 8,519 | 10,115 | 12,323 | 11,506 | 11,763 | 11,959 | 12,384 | 12,672 | 13,217 | 13,563 | 13,335 | 14,402 | (R) 14,865 | 13,868 | 12,922 | 13,082 | 14,091 | 13,976 | 13,694 | 13,682 | 12,667 | 
| International operations | 566 | 1,280 | 2,243 | 1,949 | 1,747 | 2,488 | 3,909 | 3,940 | 4,120 | 4,113 | 4,279 | 4,443 | 4,618 | 4,915 | 4,923 | 5,250 | (R) 5,508 | 5,336 | 5,079 | 5,219 | 5,592 | 5,974 | 6,018 | 6,205 | 6,187 | 
| Seats per aircraft | |||||||||||||||||||||||||
| Domestic operations | 60.9 | 83.6 | 103.1 | 123.9 | 137.1 | 146.4 | 142.1 | 141.1 | 139.7 | 137.5 | 133.7 | 130.5 | 130.2 | 132.7 | 131.5 | 131.2 | 128.4 | 130.4 | 123.6 | 115.3 | 115.0 | 114.0 | 113.9 | 114.3 | 114.9 | 
| International operations | 73.3 | 104.0 | 109.4 | 163.7 | 215.7 | 245.7 | 224.1 | 212.6 | 215.5 | 208.3 | 203.0 | 203.6 | 200.1 | 205.3 | 199.3 | 198.4 | 198.2 | 199.2 | 193.4 | 187.4 | 190.2 | 190.4 | 187.3 | 188.6 | 191.5 | 
| Seat-miles per gallon | |||||||||||||||||||||||||
| Domestic operations | 27 | 24 | 27 | 32 | 41 | 44 | 46 | 47 | 47 | 48 | 47 | 48 | 47 | 48 | 50 | 49 | (R) 49 | 50 | 53 | 53 | 53 | 54 | 54 | 55 | 58 | 
| International operations | 24 | 23 | 23 | 32 | 50 | 41 | 44 | 44 | 47 | 49 | 46 | 46 | 45 | 47 | 48 | 46 | (R) 46 | 44 | 42 | 39 | 41 | 42 | 44 | 45 | 47 | 
| Energy intensity (Btu/passenger-mile) | |||||||||||||||||||||||||
| Domestic operations | 8,633 | 10,118 | 10,185 | 7,746 | 5,742 | 5,047 | 4,890 | 4,671 | 4,564 | 4,558 | 4,411 | 4,334 | 4,193 | 4,063 | 3,886 | 3,981 | (R) 3,888 | 3,848 | 3,609 | 3,496 | 3,410 | 3,232 | 3,142 | 3,040 | 2,931 | 
| International operations | 9,199 | 10,292 | 10,986 | 8,465 | 4,339 | 5,103 | 4,484 | 4,609 | 4,258 | 4,098 | 4,114 | 4,109 | 4,073 | 3,918 | 3,858 | 3,932 | (R) 3,857 | 4,039 | 3,989 | 4,179 | 3,888 | 3,825 | 3,676 | 3,578 | 3,490 | 
| Load factor (percent) | |||||||||||||||||||||||||
| Domestic operations | 58.5 | 54.7 | 48.9 | 54.6 | 58.0 | 60.7 | 60.4 | 61.2 | 62.4 | 62.0 | 64.7 | 65.4 | 67.9 | 69.1 | 69.9 | 69.8 | 71.0 | 69.1 | 70.3 | 72.6 | 74.4 | 77.0 | 79.0 | 79.8 | 79.6 | 
| International operations | 62.2 | 56.8 | 53.0 | 50.4 | 62.8 | 64.6 | 69.1 | 67.3 | 67.1 | 67.6 | 70.6 | 71.8 | 73.3 | 74.1 | 72.5 | 74.2 | 75.9 | 72.8 | 76.6 | 76.5 | 79.1 | 79.5 | 79.9 | 80.4 | 79.4 | 
KEY: Btu = British thermal unit; R = revised.
a U.S. owned carriers only. Operations of foreign-owned carriers in or out of the United States not included.
NOTES
	Aircraft-miles 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-miles
	  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.
	  Heat
	  equivalent factor used for Btu conversion is 135,000 Btu/gallon.
SOURCES
	  Aircraft-miles,
	  available seat-miles, passenger-miles, and load factor:
	1960-80:
	  Air Transport Association, available at http://www.air-transport.org/ as of
	  July 31, 2002.
	1985-2008: U.S. Department of
	  Transportation, Research and Innovative Technology Administration, Bureau of
	  Transportation Statistics, Office of Airline Information, Air Carrier Traffic Statistics (Washington DC: Annual December issues).
	  Fuel
	  consumed:
	U.S. Department of Transportation,
	  Research and Innovative Technology Administration, Bureau of Transportation
	  Statistics, Office of Airline Information, available at
	  http://www.bts.gov/oai/fuel/fuelyearly.html as of Nov. 6, 2009.
	  Seats per aircraft, seat-miles per
	  gallon, and energy intensiveness:
	Derived
	  by calculation.