"TABLE 14-7a   Change in Passenger-Miles of Travel, Energy Consumption, and Energy Efficiency: 1992–2002",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"1992 = 100
",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Passenger-miles of travel,100,102,104,105,108,111,115,118,121,125,127,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Energy consumption,100,103,105,107,109,112,114,119,119,119,121,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Energy efficiency ,100,99,99,99,99,100,100,99,102,105,105,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"
NOTES: To make it easier to compare data of differing magnitudes over time, the Bureau of Transportation Statistics divided the data for all years in each category (see table 14-7b) by the initial year value and multiplied the result by 100. 

Passenger-miles of travel (pmt) is the sum of pmt for certificated air carriers (domestic), passenger cars, motorcycles, light trucks (other 2-axle, 4-tire vehicles), buses, transit (excluding bus), and intercity/Amtrak rail.  Energy consumption is the sum of usage by commercial aviation (passenger), gasoline fuel (passenger cars, light trucks, and buses), and Amtrak (which includes electricity and distillate/diesel fuels).  Passenger commercial domestic aviation fuel consumption data were estimated from total commercial domestic aviation fuel consumption data.  General aviation data were excluded because passenger and freight operations data cannot be disaggregated. ",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"
SOURCE:U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, calculations based in data on table 14-7b.",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
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