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| this year | last year | this year | last year | this year | last year | |
| ( . . . . . . . . . . . . . . . . . . . U.S.$/ton . . . . . . . . . . . . . . . . . . . . . . .) | ||||||
| March contract | March contract | March contract | ||||
| December 21 | 183 | 146 | 139 | 90 | 268 | 211 |
| 28 | 187 | 150 | 143 | 92 | 270 | 210 |
| January 4 | 184 | 146 | 145 | 90 | 279 | 205 |
| 11 | 180 | 142 | 141 | 92 | 270 | 206 |
| 18 | 177 | 140 | 140 | 92 | 272 | 204 |
| 25 | 180 | 137 | 140 | 92 | 266 | 203 |
| Sept. contract | Sept. contract | Sept. contract | ||||
| December 21 | 158 | 129 | 120 | 96 | 259 | 217 |
| 28 | 162 | 129 | 122 | 98 | 262 | 217 |
| January 4 | 163 | 129 | 125 | 96 | 269 | 213 |
| 11 | 156 | 127 | 120 | 98 | 262 | 213 |
| 18 | 156 | 129 | 121 | 98 | 264 | 211 |
| 25 | 157 | 125 | 119 | 98 | 261 | 211 |