| Table 3. Estimated stock numbers at age. | ||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 1996 | 1556 | 3156 | 3000 | 2530 | 1841 | 995 | 452 | 186 | 95 | 106 |
| 1997 | 1176 | 1167 | 2328 | 2176 | 1798 | 1198 | 598 | 250 | 87 | 120 |
| 1998 | 3385 | 1115 | 1075 | 1566 | 1533 | 1171 | 719 | 317 | 126 | 121 |
| 1999 | 3563 | 2199 | 1071 | 906 | 976 | 842 | 588 | 302 | 124 | 128 |
| 2000 | 2572 | 2211 | 1961 | 1100 | 708 | 528 | 404 | 243 | 110 | 118 |
| 2001 | 2043 | 2549 | 1822 | 1708 | 1072 | 523 | 298 | 183 | 116 | 120 |
| 2002 | 1456 | 2021 | 2115 | 1678 | 1341 | 729 | 329 | 150 | 77 | 133 |
| 2003 | 2745 | 1383 | 1764 | 1878 | 1427 | 904 | 433 | 192 | 72 | 128 |
| 2004 | 4932 | 2758 | 1812 | 1604 | 1366 | 912 | 504 | 231 | 119 | 117 |
| 2005 | 6835 | 3829 | 2429 | 1691 | 1206 | 803 | 455 | 238 | 102 | 139 |
| 2006 | 6925 | 4666 | 2697 | 1601 | 1149 | 674 | 389 | 200 | 114 | 136 |
| 2007 | 6308 | 5485 | 3423 | 1981 | 1125 | 665 | 325 | 171 | 74 | 122 |
| 2008 | 5480 | 4668 | 3698 | 2544 | 1348 | 690 | 357 | 160 | 87 | 113 |
| 2009 | 6058 | 4302 | 3308 | 2546 | 1785 | 934 | 429 | 203 | 75 | 119 |
| 2010 | 5594 | 5533 | 3490 | 2888 | 1863 | 1135 | 575 | 242 | 104 | 114 |
| 2011 | 4429 | 4358 | 4217 | 2985 | 2071 | 1195 | 658 | 284 | 117 | 117 |
| 2012 | 3802 | 3178 | 3087 | 2853 | 2166 | 1276 | 710 | 357 | 126 | 115 |
| 2013 | 5300 | 2237 | 1842 | 2352 | 2077 | 1331 | 676 | 341 | 152 | 114 |
| 2014 | 10866 | 5341 | 1821 | 1497 | 1836 | 1569 | 778 | 372 | 164 | 137 |
| 2015 | 11240 | 9082 | 5131 | 1756 | 1228 | 1218 | 888 | 300 | 142 | 134 |
| 2016 | 5631 | 7203 | 6089 | 3809 | 1463 | 822 | 639 | 391 | 138 | 115 |
| 2017 | 3006 | 4132 | 3787 | 3366 | 2411 | 990 | 446 | 337 | 205 | 121 |
| 2018 | 1684 | 2983 | 3157 | 2453 | 2093 | 1295 | 503 | 220 | 164 | 193 |
| 2019 | 810 | 1200 | 2807 | 2702 | 1980 | 1411 | 1013 | 398 | 172 | 239 |
| 2020 | 450 | 947 | 1148 | 2425 | 2273 | 1405 | 836 | 547 | 228 | 236 |
| 2021 | 260 | 355 | 625 | 962 | 1627 | 1262 | 714 | 341 | 243 | 234 |
| 2022 | 512 | 284 | 432 | 484 | 637 | 903 | 634 | 350 | 154 | 205 |
| 2023 | 623 | 648 | 439 | 482 | 442 | 498 | 546 | 323 | 194 | 159 |
| 2024 | 461 | 724 | 782 | 444 | 423 | 329 | 347 | 351 | 183 | 157 |
| 2025 | 1588 | 705 | 981 | 1049 | 481 | 364 | 253 | 242 | 222 | 144 |