This method of counting has been one of my frustrations for a long time. Using passengers instead of passenger miles makes the runs carring short distance rider look better than they really are at the expenss of the runs carrying long distance passengers. Given that Amtrak is and always has been fixated on the Northeast, to do things this way serves their purpose in making the Northeast Corridor look much better tnat the national trains despite the Northeast being the worst sinkhole for money.
The total passenger miles for all Amtrak trains are in the monthly reports if you want the numbers. But this is an Amtrak press release for publicity, not something for the inside baseball crowd.
The August 2010 report has not been posted yet, but the July 2010 and 2009 reports are available. For the first 10 months of FY10, the total passenger miles were 5,243,663,000 (for 23,889,000 passengers) while the same period for FY09, the miles were 4,858,792,000 (for 22,518,000 passengers). So the total passenger miles are up a bit more percentage wise than total passengers.
But a press release that says Amtrak has 6 something billion passenger miles is not a number that people can relate to. No, stick with total number of passengers and revenue. The important aspect for the FY10 numbers is that having record ridership and revenue help with the political narrative going into what will be a bumpier time in Congress. Flat or declining ridership numbers would not.