“According to the United States Department of Transportation’s Bureau of Transportation Statistics, rail and mass transit are considerably more subsidized on a per passenger-mile basis by the federal government than other forms of transportation; the subsidy varies year to year, but exceeds $100 dollars (in 2000 dollars) per thousand passenger-miles, compared to subsidies around $10 per thousand passenger-miles for aviation (with general aviation subsidized considerably more per passenger-mile than commercial aviation), subsidies around $4 per thousand passenger-miles for intercity buses, and automobiles being a small net contributor through the gas tax and other user fees rather than being subsidized.[74”
http://en.wikipedia.org/wiki/Amtrak#Public_funding
What is the subsidy that the Sante Fe railroad receives?