| Revenue ton-miles (billions) | |
|---|---|
| 2007 Q1 | 421.8 |
| 2007 Q2 | 439.1 |
| 2007 Q3 | 444.3 |
| 2007 Q4 | 446.0 |
| 2008 Q1 | 442.5 |
| 2008 Q2 | 443.0 |
SOURCES: 1990–1996: Association of American Railroads, Railroad Revenues, Expenses, and Income. Class I Railroads in the United States, R&E Series. 1997–2008: Surface Transportation Board, Office of Economics, Environmental Analysis and Administration, Quarterly Selected Earnings Report, available at http://www.stb.dot.gov/ as of August 2008.