| Table 3. Estimated stock numbers at age. | ||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 1996 | 1525 | 1973 | 2296 | 2330 | 1854 | 1003 | 438 | 182 | 73 | 118 |
| 1997 | 1779 | 1290 | 1658 | 1846 | 1698 | 1173 | 589 | 237 | 91 | 105 |
| 1998 | 2764 | 1538 | 1121 | 1318 | 1384 | 1102 | 679 | 302 | 112 | 102 |
| 1999 | 2874 | 2361 | 1344 | 967 | 968 | 859 | 596 | 309 | 122 | 97 |
| 2000 | 2854 | 2408 | 2019 | 1191 | 760 | 571 | 420 | 244 | 110 | 89 |
| 2001 | 2472 | 2464 | 2049 | 1648 | 978 | 515 | 304 | 188 | 107 | 95 |
| 2002 | 2484 | 2120 | 2105 | 1723 | 1285 | 668 | 311 | 152 | 87 | 106 |
| 2003 | 2776 | 2154 | 1834 | 1742 | 1360 | 854 | 403 | 181 | 82 | 115 |
| 2004 | 3107 | 2399 | 1884 | 1534 | 1266 | 840 | 469 | 209 | 98 | 112 |
| 2005 | 4047 | 2642 | 2003 | 1517 | 1097 | 706 | 416 | 223 | 96 | 110 |
| 2006 | 3807 | 3513 | 2199 | 1556 | 1078 | 622 | 356 | 194 | 100 | 100 |
| 2007 | 3672 | 3278 | 2911 | 1759 | 1100 | 620 | 315 | 167 | 79 | 90 |
| 2008 | 4050 | 3096 | 2714 | 2284 | 1239 | 645 | 335 | 155 | 80 | 86 |
| 2009 | 3950 | 3508 | 2581 | 2160 | 1604 | 801 | 385 | 181 | 76 | 89 |
| 2010 | 3212 | 3465 | 2941 | 2167 | 1620 | 995 | 483 | 210 | 87 | 85 |
| 2011 | 2164 | 2808 | 3018 | 2424 | 1686 | 1059 | 574 | 247 | 97 | 83 |
| 2012 | 2503 | 1800 | 2426 | 2474 | 1866 | 1114 | 631 | 280 | 111 | 84 |
| 2013 | 4519 | 2056 | 1454 | 2048 | 1918 | 1180 | 613 | 280 | 110 | 83 |
| 2014 | 4604 | 4075 | 1727 | 1245 | 1590 | 1468 | 733 | 340 | 142 | 102 |
| 2015 | 4148 | 3936 | 3624 | 1439 | 942 | 991 | 813 | 247 | 133 | 100 |
| 2016 | 4378 | 3436 | 3374 | 2818 | 1141 | 617 | 561 | 335 | 109 | 105 |
| 2017 | 3713 | 3824 | 2779 | 2686 | 2073 | 810 | 377 | 298 | 182 | 117 |
| 2018 | 2049 | 3364 | 3283 | 2235 | 2082 | 1427 | 521 | 223 | 184 | 182 |
| 2019 | 1565 | 1732 | 2966 | 2779 | 1833 | 1368 | 994 | 325 | 148 | 231 |
| 2020 | 1396 | 1332 | 1521 | 2456 | 2238 | 1294 | 830 | 537 | 193 | 206 |
| 2021 | 1487 | 1181 | 1083 | 1381 | 1859 | 1439 | 742 | 359 | 278 | 174 |
| 2022 | 2095 | 1274 | 1006 | 893 | 1095 | 1191 | 843 | 354 | 185 | 189 |
| 2023 | 2210 | 1857 | 1114 | 832 | 694 | 766 | 722 | 441 | 194 | 160 |
| 2024 | 1624 | 1943 | 1638 | 942 | 632 | 449 | 485 | 372 | 252 | 152 |
| 2025 | 2102 | 1401 | 1695 | 1424 | 724 | 434 | 293 | 268 | 218 | 167 |