Figure 1,,,,,,
Energy Intensities of Passenger Modes: 1980–1998,,,,,,
Btu per passenger-mile,,,,,,

Year,Automobiles,Transit buses,Intercity buses,Certified air carriers ,Intercity Amtrak,Rail transit
1980,"4,166","2,813","1,069","5,837","3,176","3,008"
1981,"4,038","3,027","1,155","5,743","2,957","2,946"
1982,"3,939","3,237","1,149","5,147","3,156","3,069"
1983,"4,098","3,177","1,174","5,107","2,957","3,212"
1984,"4,010","3,204","1,247","5,031","3,027","3,732"
1985,"3,990","3,421","1,324","5,679","2,800","3,461"
1986,"4,007","3,512",869,"5,447","2,574","3,531"
1987,"3,875","3,542",939,"4,753","2,537","3,534"
1988,"3,722","3,415",965,"4,814","2,462","3,585"
1989,"3,668","3,711",963,"4,796","2,731","3,397"
1990,"3,864","3,735",944,"4,811","2,609","3,453"
1991,"3,703","3,811",978,"4,560","2,503","3,710"
1992,"3,731","4,303",978,"4,482","2,610","3,575"
1993,"3,814","4,257",972,"4,304","2,646","3,687"
1994,"3,775","4,604",876,"4,455","2,351","3,828"
1995,"3,702","4,650",816,"4,236","2,314","3,818"
1996,"3,671","4,512",816,"4,081","2,389","3,444"
1997,"3,639","4,318",872,"4,047","2,458","3,253"
1998,"3,671","4,238",713,"3,999","2,460","3,216"

KEY: Btu = British thermal units.,,,,,,
"SOURCE: Stacy C. Davis, Transportation Energy Data Book, Edition 20 (Oak Ridge, TN: Oak Ridge  ",,,,,,
"National Laboratory, 2000), table 2.12.",,,,,,