(Short tons, thousands)
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2001 | 76 | 78 | 90 | 79 | 79 | 79 | 77 | 75 | 67 | 83 | 77 | 78 |
| 2002 | 65 | 69 | 83 | 72 | 73 | 78 | 76 | 76 | 77 | 90 | 83 | 70 |
| 2003 | 72 | 74 | 89 | 71 | 72 | 74 | 74 | 68 | 71 | 77 | 78 | 73 |
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, Form 41 Traffic - Segment Data, various years, as of Sept. 16, 2004.