(000m3)
| North Island | South Island | Total | ||||
| Quarters | Production | Stocks | Production | Stocks | Production | Stocks |
| 31-Mar-01 | 638 | 403 | 247 | 168 | 885 | 571 |
| 30-Jun-01 | 708 | 406 | 253 | 163 | 961 | 569 |
| 30-Sep-01 | 762 | 402 | 278 | 160 | 1040 | 562 |
| 31-Dec-01 | 672 | 351 | 263 | 146 | 935 | 497 |
| 31-Mar-02 | 687 | 326 | 242 | 134 | 929 | 460 |
| 30-Jun-02 | 793 | 344 | 298 | 116 | 1091 | 460 |
| 30-Sep-02 | 876 | 373 | 318 | 131 | 1194 | 504 |
| 31-Dec-02 | 804 | 358 | 283 | 125 | 1087 | 483 |
| 31-Mar-03 | 791 | 381 | 273 | 131 | 1079 | 512 |
| 30-Jun-03 | 809 | 422 | 296 | 148 | 1106 | 570 |
| 30-Sep-03 | 808 | 478 | 306 | 162 | 1115 | 640 |
| 31-Dec-03 | 734 | 444 | 274 | 155 | 1008 | 599 |
| 31-Mar-04 | 715 | 438 | 267 | 160 | 982 | 598 |
| 30-Jun-04 | 826 | 412 | 298 | 158 | 1124 | 570 |
| 30-Sep-04 | 828 | 458 | 319 | 184 | 1147 | 642 |
| 30-Dec-04 | 776 | 430 | 280 | 171 | 1056 | 601 |
| 31-Mar-05 | 703 | 413 | 252 | 162 | 955 | 575 |