| Tons per carload | |
|---|---|
| 1999 | 63.4 |
| 2000 | 62.6 |
| 2001 | 64.0 |
| 2002 | 63.3 |
| 2003 | 62.3 |
| 2004 | 61.3 |
| 2005 | 61.0 |
| 2006 | 60.9 |
| 2007 | 61.7 |
| 2008 | 63.1 |
NOTE: Average loaded U.S. railcar weight is total tons divided by total carloads transported.
SOURCE: Association of American Railroads, Railroad Facts 2009 (Washington, DC: 2009), p. 37.