Figure 1,,,,,,
Energy Intensities of Passenger Modes: 1980–1999,,,,,,
(Btu per passenger-mile),,,,,,
Year,Automobiles,Certified air carriers ,Transit,Intercity,Transit,Intercity Amtrak
1980,"4,166","5,837","2,813","1,082","3,008","3,176"
1981,"4,038","5,743","3,027","1,051","2,946","2,957"
1982,"3,939","5,147","3,237","1,172","3,069","3,156"
1983,"4,098","5,107","3,177","1,286","3,212","2,957"
1984,"4,010","5,031","3,204",954,"3,732","3,027"
1985,"3,990","5,679","2,421",964,"3,461","2,800"
1986,"4,007","5,447","3,512",870,"3,531","2,574"
1987,"3,875","4,751","3,542",940,"3,534","2,537"
1988,"3,722","4,814","3,415",963,"3,585","2,462"
1989,"3,668","4,808","3,711",964,"3,397","2,731"
1990,"3,864","5,006","3,735",962,"3,453","2,609"
1991,"3,703","4,595","3,811",963,"3,710","2,503"
1992,"3,731","4,482","4,310",964,"3,575","2,610"
1993,"3,814","4,558","4,262",962,"3,687","2,646"
1994,"3,775","4,336","4,609",964,"3,828","2,351"
1995,"3,702","4,282","4,643",964,"3,818","2,592"
1996,"3,683","4,096","4,675",963,"3,444","2,783"
1997,"3,638","4,044","4,744",963,"3,253","2,923"
1998,"3,607","3,981","4,688",963,"3,216","2,892"
1999,"3,635","3,889","4,610",964,"3,168","3,063"
KEY: Btu = British thermal units.,,,,,,
"SOURCE: Stacy C. Davis, Transportation Energy Data Book, Edition 21 (Oak Ridge, TN: Oak Ridge National Laboratory, 2001), tables 2.11 and 2.12.",,,,,,