(Short tons, thousands)
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2001 | 122 | 136 | 172 | 140 | 142 | 151 | 152 | 154 | 146 | 165 | 153 | 140 |
| 2002 | 129 | 121 | 161 | 157 | 159 | 181 | 186 | 175 | 179 | 256 | 233 | 170 |
| 2003 | 149 | 134 | 183 | 169 | 173 | 183 | 181 | 189 | 193 | 218 | 218 | 189 |
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, Form 41 Traffic - Segment Data, various years, as of Sept. 16, 2004.