The airline reports came directly from the airlines in press releases. Amtrak's third quarter report came in a press release from Amtrak. I computed the percentage increase or decrease in Federal outlays between 1980 and 1994 for each category. There is also a similar table using constant 1987 dollars, which I'll leave for you to look up if you want to. You will also note that air and highways received large increases in outlays during this time period while rail had a huge decrease in Federal outlays.
Figures are in BTU per passenger mile.
If anyone has this data, please email me. The 2,625 BTU per passenger-mile for autos going over 75 miles used in this chart was derived by using 3,593 BTU per passenger mile at a load factor of 1.6 for all auto trips adjusted by a load factor of 2.19 for trips over 75 miles. So, if you drive to work, carpool or ride mass transit to save energy. Statistical Abstract of the United States.