An old CBO document that was available via Google. I've flipped all the tables around so that you don't have to try and turn your head 90 degrees to read them. Posted for the appendix which contains (again, old) definitions of how Amtrak allocates costs and contains the revenues, costs (short term avoidable and fully allocated), passengers, and passenger-miles for Amtrak routes in Fiscal Years 1980 and 1981. This may be of interest for historical reasons.