| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1991 | 80581720 | 16861113 | 5974081 | 4126814 | 1720423 | 957679 | 276739 | 78256 | 26617 |
| 1992 | 47950606 | 14830264 | 5488832 | 2699752 | 1874693 | 786230 | 450144 | 135828 | 52944 |
| 1993 | 42878554 | 8898397 | 4834039 | 2399922 | 1227309 | 811140 | 326015 | 175338 | 68265 |
| 1994 | 67078952 | 7827880 | 2879678 | 2141153 | 1027477 | 529568 | 326314 | 123222 | 85860 |
| 1995 | 55249415 | 12343002 | 2547818 | 1225073 | 905780 | 394173 | 203738 | 112538 | 69332 |
| 1996 | 67261569 | 10133651 | 3786166 | 1050893 | 513567 | 372115 | 165229 | 82226 | 72115 |
| 1997 | 57131200 | 12531845 | 3176489 | 1648957 | 426634 | 195579 | 132374 | 57176 | 55178 |
| 1998 | 85645075 | 10552014 | 4080969 | 1432157 | 721860 | 184532 | 83177 | 48323 | 38970 |
| 1999 | 92178233 | 15981205 | 3432857 | 1801222 | 651493 | 309497 | 77520 | 33996 | 30629 |
| 2000 | 52919233 | 17196244 | 5283836 | 1550849 | 813047 | 312209 | 141627 | 35741 | 28575 |
| 2001 | 60171695 | 9766467 | 5576779 | 2360026 | 690001 | 344527 | 132477 | 55976 | 22247 |
| 2002 | 55004330 | 11058546 | 3191818 | 2559956 | 1099627 | 293500 | 143761 | 50748 | 28615 |
| 2003 | 62470003 | 10090062 | 3630635 | 1443193 | 1186664 | 496267 | 128046 | 60828 | 32925 |
| 2004 | 40190770 | 11612002 | 3386008 | 1711422 | 698140 | 542127 | 224313 | 56631 | 40354 |
| 2005 | 41018018 | 7359210 | 3978665 | 1627236 | 821623 | 330922 | 249913 | 99242 | 41491 |
| 2006 | 29656822 | 7519140 | 2458772 | 1828219 | 781869 | 369222 | 147303 | 101121 | 54004 |
| 2007 | 34302845 | 5390287 | 2503543 | 1127483 | 840612 | 363398 | 152988 | 62927 | 62113 |
| 2008 | 29583322 | 6351584 | 1779179 | 1119046 | 526295 | 383753 | 172067 | 66175 | 54789 |
| 2009 | 25639447 | 5448472 | 2155440 | 811670 | 502650 | 242535 | 165159 | 75049 | 51630 |
| 2010 | 42157936 | 4685710 | 1813293 | 962975 | 393489 | 232536 | 114723 | 70291 | 55614 |
| 2011 | 29540487 | 7824952 | 1586378 | 819939 | 485651 | 198399 | 116982 | 59475 | 63306 |
| 2012 | 24242029 | 5445906 | 2695113 | 798101 | 411936 | 246878 | 100891 | 56540 | 64635 |
| 2013 | 38682841 | 4479063 | 1847185 | 1288652 | 404285 | 199171 | 121995 | 49102 | 57622 |
| 2014 | 25219429 | 7221232 | 1519816 | 871056 | 623236 | 187220 | 93720 | 56955 | 50208 |
| 2015 | 17283936 | 4634634 | 2536374 | 744151 | 442811 | 288072 | 94760 | 46281 | 55130 |
| 2016 | 20184338 | 3136061 | 1581153 | 1243118 | 374164 | 218534 | 134266 | 44292 | 46995 |
| 2017 | 18389513 | 3699445 | 1033374 | 688612 | 602416 | 179265 | 102493 | 55336 | 36309 |
| 2018 | 15426649 | 3381950 | 1243718 | 463259 | 309522 | 286084 | 79151 | 39721 | 32411 |
| 2019 | 17379691 | 2849628 | 1121534 | 517354 | 222111 | 146269 | 129327 | 33676 | 30045 |
| 2020 | 11787443 | 3207835 | 979207 | 497741 | 254954 | 114141 | 73912 | 61672 | 31112 |
| 2021 | 7631367 | 2178232 | 1099883 | 471736 | 250043 | 128087 | 58121 | 33730 | 43556 |
| 2022 | 22113819 | 1376459 | 769117 | 499073 | 248728 | 127979 | 70752 | 31682 | 42272 |
| 2023 | 11634023 | 4094862 | 479942 | 405457 | 266722 | 137882 | 69198 | 40891 | 41854 |
| 2024 | 17705445 | 2137366 | 1430163 | 245419 | 224123 | 150750 | 82100 | 40242 | 50703 |