| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1991 | 8645517 | 5101334 | 2660446 | 2198621 | 1015247 | 580981 | 177698 | 51043 | 15725 |
| 1992 | 6597613 | 3890722 | 2572608 | 1523293 | 1224505 | 544535 | 307831 | 92684 | 34118 |
| 1993 | 6201150 | 2837185 | 2032688 | 1400693 | 806444 | 596318 | 249686 | 131348 | 50615 |
| 1994 | 8349052 | 2534326 | 1350463 | 1113828 | 695145 | 371311 | 251960 | 96049 | 65296 |
| 1995 | 8154165 | 3654287 | 1195479 | 700688 | 561023 | 302692 | 151851 | 91604 | 55241 |
| 1996 | 7864898 | 3348712 | 1574128 | 570727 | 322101 | 243159 | 125723 | 59311 | 55302 |
| 1997 | 7470138 | 3367390 | 1471780 | 791168 | 264532 | 133212 | 94790 | 45018 | 39894 |
| 1998 | 9424349 | 3007486 | 1527249 | 757012 | 392206 | 120599 | 57638 | 36740 | 30808 |
| 1999 | 9789096 | 3933576 | 1271940 | 758518 | 372238 | 178534 | 52313 | 23186 | 24613 |
| 2000 | 6880510 | 4188095 | 1817306 | 655411 | 396746 | 187052 | 86648 | 24024 | 20542 |
| 2001 | 6906342 | 2843157 | 1949545 | 967020 | 330413 | 188306 | 83821 | 35341 | 16333 |
| 2002 | 5909315 | 2833203 | 1235394 | 1015651 | 498786 | 151375 | 82265 | 32698 | 18401 |
| 2003 | 5963840 | 2467256 | 1300747 | 640248 | 538586 | 242471 | 68940 | 34361 | 19429 |
| 2004 | 5134352 | 2690346 | 1276694 | 750950 | 366053 | 283718 | 121193 | 31372 | 22197 |
| 2005 | 4177494 | 2146797 | 1388436 | 722484 | 415185 | 188148 | 139855 | 55129 | 21884 |
| 2006 | 2822185 | 1811155 | 1042088 | 780061 | 401718 | 204889 | 87439 | 58292 | 28451 |
| 2007 | 2683116 | 1234011 | 958125 | 575375 | 435821 | 205262 | 94621 | 37455 | 32317 |
| 2008 | 2495682 | 1203509 | 641370 | 523658 | 312774 | 223901 | 103317 | 43366 | 29497 |
| 2009 | 2613886 | 1103505 | 643307 | 336147 | 267332 | 148411 | 103465 | 45662 | 29944 |
| 2010 | 3311177 | 1113629 | 572264 | 345498 | 176337 | 124387 | 68925 | 44818 | 31960 |
| 2011 | 2902865 | 1514852 | 587786 | 327542 | 205285 | 96906 | 67438 | 36275 | 39077 |
| 2012 | 2463662 | 1265567 | 862964 | 350977 | 195717 | 115818 | 54241 | 35771 | 39954 |
| 2013 | 2787536 | 1098250 | 697462 | 537371 | 207219 | 104914 | 61550 | 27377 | 37174 |
| 2014 | 2712483 | 1338985 | 610637 | 409465 | 318533 | 108042 | 54757 | 30160 | 31376 |
| 2015 | 2104568 | 1185728 | 818708 | 366824 | 243437 | 172251 | 59895 | 29028 | 32749 |
| 2016 | 1975198 | 872584 | 638408 | 492629 | 216981 | 132643 | 91763 | 30536 | 31221 |
| 2017 | 1497677 | 852921 | 443564 | 330191 | 289411 | 113351 | 66915 | 41171 | 27217 |
| 2018 | 1201676 | 687494 | 460520 | 231249 | 183330 | 155285 | 56359 | 29076 | 28757 |
| 2019 | 1185112 | 551585 | 386577 | 236092 | 128338 | 94899 | 77889 | 25442 | 26381 |
| 2020 | 926018 | 529012 | 314658 | 205328 | 136664 | 72382 | 52182 | 39747 | 27371 |
| 2021 | 727785 | 392227 | 298471 | 177525 | 122845 | 77449 | 40976 | 27148 | 36914 |
| 2022 | 915772 | 296922 | 229439 | 180137 | 116359 | 78010 | 49937 | 25896 | 41637 |
| 2023 | 891772 | 435270 | 167876 | 160445 | 126073 | 81154 | 54223 | 35219 | 47825 |
| 2024 | 1163663 | 389398 | 264767 | 113106 | 116328 | 90658 | 60096 | 39971 | 62373 |