| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1991 | 79526930 | 16080284 | 6149257 | 4033952 | 1687014 | 947012 | 275892 | 78635 | 26696 |
| 1992 | 48775684 | 14623557 | 5272620 | 2765609 | 1857210 | 782381 | 447476 | 133670 | 51505 |
| 1993 | 41856593 | 8960480 | 4740840 | 2330385 | 1232678 | 804203 | 324981 | 174328 | 66902 |
| 1994 | 64540604 | 7677990 | 2871111 | 2070204 | 1012949 | 517865 | 324820 | 122331 | 85152 |
| 1995 | 57257346 | 11827592 | 2426141 | 1218798 | 860922 | 396466 | 194936 | 112519 | 68762 |
| 1996 | 64667684 | 10438523 | 3618614 | 1013174 | 512588 | 355055 | 164089 | 78025 | 72488 |
| 1997 | 58268312 | 11846880 | 3288413 | 1537921 | 416699 | 196189 | 128970 | 55758 | 50841 |
| 1998 | 91297535 | 10678305 | 3786070 | 1457444 | 680831 | 178047 | 80553 | 48170 | 36424 |
| 1999 | 93370572 | 16731599 | 3407746 | 1669197 | 651759 | 294586 | 74704 | 31740 | 30202 |
| 2000 | 53220208 | 17157953 | 5465060 | 1530100 | 770998 | 302298 | 136950 | 34067 | 26979 |
| 2001 | 54258463 | 9803392 | 5648955 | 2397727 | 675386 | 331289 | 126966 | 53525 | 21252 |
| 2002 | 57853045 | 9998026 | 3259587 | 2561921 | 1089109 | 289794 | 137130 | 48607 | 26602 |
| 2003 | 58456093 | 10648560 | 3315577 | 1484906 | 1177187 | 479276 | 125195 | 57329 | 30752 |
| 2004 | 38920893 | 10770694 | 3577473 | 1544446 | 708281 | 542280 | 215873 | 54574 | 37338 |
| 2005 | 37914145 | 7175039 | 3646247 | 1701624 | 753070 | 333167 | 248465 | 93424 | 37770 |
| 2006 | 28224361 | 6992521 | 2421854 | 1687514 | 797589 | 338237 | 145726 | 100324 | 48822 |
| 2007 | 31849296 | 5207957 | 2363019 | 1105985 | 775717 | 355000 | 148845 | 60802 | 58455 |
| 2008 | 25705893 | 5877940 | 1758602 | 1072047 | 504887 | 347050 | 158422 | 64495 | 50618 |
| 2009 | 24558457 | 4744197 | 1988841 | 802843 | 490133 | 223120 | 147906 | 65173 | 47928 |
| 2010 | 33004740 | 4531378 | 1602106 | 906176 | 377641 | 227070 | 100115 | 63029 | 48072 |
| 2011 | 26901570 | 6090671 | 1540636 | 748210 | 447166 | 187324 | 112652 | 48874 | 55056 |
| 2012 | 24323527 | 4965029 | 2089753 | 746705 | 382023 | 226627 | 93917 | 55032 | 51369 |
| 2013 | 40468477 | 4489195 | 1699379 | 997808 | 370395 | 184669 | 109119 | 44704 | 51052 |
| 2014 | 20659347 | 7466104 | 1529888 | 813230 | 494047 | 174663 | 85497 | 49233 | 43418 |
| 2015 | 17321708 | 3811693 | 2549978 | 733097 | 404595 | 240332 | 84981 | 41387 | 44431 |
| 2016 | 15100452 | 3195782 | 1298834 | 1212568 | 360258 | 192595 | 112119 | 38539 | 37564 |
| 2017 | 16106270 | 2784926 | 1076267 | 583223 | 567530 | 163158 | 82818 | 44681 | 28108 |
| 2018 | 14037270 | 2972922 | 945633 | 476189 | 268342 | 251432 | 64910 | 28510 | 22032 |
| 2019 | 14808554 | 2591621 | 1011883 | 411543 | 221410 | 123926 | 107498 | 25059 | 17746 |
| 2020 | 11616430 | 2734313 | 893570 | 481792 | 205345 | 110929 | 60168 | 48633 | 17318 |
| 2021 | 5955042 | 2144533 | 937589 | 412088 | 239344 | 104045 | 55374 | 28512 | 28534 |
| 2022 | 14079876 | 1099642 | 743178 | 450867 | 212401 | 127295 | 55948 | 29500 | 29765 |
| 2023 | 15098612 | 2600745 | 384243 | 379242 | 242897 | 117002 | 71951 | 31722 | 32678 |
| 2024 | 22028326 | 2788833 | 909082 | 196496 | 206689 | 137087 | 68389 | 42974 | 38842 |
| 2025 | 25519881 | 4068820 | 974805 | 464406 | 106641 | 115886 | 79669 | 40595 | 48946 |