"Table 4-21:  Energy Intensity of Certificated Air Carriers, All Servicesa",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
,1960,1965,1970,1975,1980,1985,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,,,,,,,,,,,,,,,,,,,,,,,,,
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","5,548","5,616","6,085","6,591","(R) 6,556","6,511",,,,,,,,,,,,,,,,,,,,,,,,,
International operations,182,284,475,377,401,415,760,807,904,961,980,998,"1,043","1,114","1,192","1,225","1,282","1,266","1,225","1,262","1,403","(R) 1,326","1,428",,,,,,,,,,,,,,,,,,,,,,,,,
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","676,949","689,065","741,674","(R) 752,125","742,461",,,,,,,,,,,,,,,,,,,,,,,,,
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","215,606","204,755","229,788","(R) 251,580","266,725",,,,,,,,,,,,,,,,,,,,,,,,,
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","482,310","505,158","557,893","(R) 584,996","591,834",,,,,,,,,,,,,,,,,,,,,,,,,
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","171,860","168,605","194,173","(R) 211,529","220,138",,,,,,,,,,,,,,,,,,,,,,,,,
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","14,845","14,017","12,848","12,959","(R) 13,623","13,789","13,458",,,,,,,,,,,,,,,,,,,,,,,,,
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","5,475","5,237","4,991","4,836","(R) 4,932","(R) 5,521","5,827",,,,,,,,,,,,,,,,,,,,,,,,,
Seats per aircraft,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Domestic operations,60.9,83.6,103.1,123.9,137.1,146.4,142.1,141.1,139.7,137.5,133.7,130.5,130.2,132.7,131.5,131.2,128.4,125.3,120.5,113.2,112.5,(R) 114.7,114.0,,,,,,,,,,,,,,,,,,,,,,,,,
International operations,73.3,104.0,109.4,163.7,215.7,245.7,224.1,212.6,215.5,208.3,203.0,203.6,200.1,205.3,199.3,198.4,198.2,185.9,176.1,162.3,163.7,(R) 189.7,186.8
Seat-miles per gallon,,,,,,,,,,,,,,,,,,,,,,,
Domestic operations,27,24,27,32,41,44,46,47,47,48,47,48,47,48,50,49,49,50,53,53,(R) 54,(R) 55,55
International operations,24,23,23,32,50,41,44,44,47,49,46,46,45,47,48,46,46,45,43,42,(R) 47,(R) 46,46
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","3,883","3,890","3,596","3,463","(R) 3,296","(R) 3,182","3,070"
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","3,833","3,965","3,920","3,872","(R) 3,429","(R) 3,523","3,574"
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,(R) 77.3,79.0
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,(R) 79.4,79.9
KEY:  Btu = British thermal unit; R = revised.,,,,,,,,,,,,,,,,,,,,,,,
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a U.S. owned carriers only. Operation of foreign-owned carriers in or out of the United States not included.,,,,,,,,,,,,,,,,,,,,,,,
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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, Internet site http://www.air-transport.org/public/industry, as of July 31, 2002.",,,,,,,,,,,,,,,,,,
"1985-2006: 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:,,,,,,,,,,,,,,,,,,
"1960-75: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Office of Airline Information, Internet site http://www.bts.gov/oai/fuel/fuelyearly.html as of July 21, 2004.",,,,,,,,,,,,,,,,,,
"1980-2006: Ibid., Internet site http://www.bts.gov/xml/fuel/report/src/index.xml as of Apr. 25, 2007.",,,,,,,,,,,,,,,,,,
"Seats per aircraft, seat-miles per gallon, and energy intensiveness:",,,,,,,,,,,,,,,,,,
Derived by calculation.,,,,,,,,,,,,,,,,,,