| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1991 | 77828818 | 16550792 | 6030377 | 4102199 | 1708349 | 951499 | 277172 | 78507 | 26327 |
| 1992 | 49040485 | 14442280 | 5392170 | 2726651 | 1877056 | 786089 | 447902 | 134900 | 51913 |
| 1993 | 43428314 | 9016642 | 4721126 | 2363042 | 1227510 | 810230 | 326070 | 175160 | 68165 |
| 1994 | 63877457 | 7896095 | 2888054 | 2087812 | 1016877 | 524069 | 326067 | 123037 | 86052 |
| 1995 | 56883247 | 11806436 | 2515083 | 1219985 | 879179 | 394102 | 200489 | 113087 | 69613 |
| 1996 | 67623509 | 10350772 | 3662203 | 1039364 | 509109 | 360666 | 163231 | 80187 | 72080 |
| 1997 | 60813125 | 12461764 | 3216397 | 1577238 | 423138 | 194768 | 130390 | 56480 | 53315 |
| 1998 | 90283228 | 11048930 | 4012497 | 1432416 | 694156 | 181544 | 81529 | 48209 | 38133 |
| 1999 | 94963164 | 16635522 | 3525440 | 1764588 | 646260 | 299468 | 76248 | 32807 | 30746 |
| 2000 | 56974691 | 17582453 | 5434051 | 1580936 | 807174 | 306130 | 138323 | 34900 | 27855 |
| 2001 | 60772863 | 10355161 | 5679261 | 2409192 | 699664 | 344005 | 129167 | 54363 | 21866 |
| 2002 | 57701978 | 11170154 | 3340242 | 2582641 | 1109903 | 298537 | 143663 | 49883 | 27761 |
| 2003 | 62477763 | 10570188 | 3676655 | 1504508 | 1196323 | 498098 | 130197 | 60713 | 31950 |
| 2004 | 41185216 | 11630005 | 3537512 | 1731481 | 721810 | 550003 | 225874 | 57420 | 39682 |
| 2005 | 39654085 | 7529256 | 3981709 | 1688586 | 834271 | 341046 | 253901 | 100223 | 41522 |
| 2006 | 29656866 | 7332408 | 2510112 | 1842559 | 804335 | 375267 | 150693 | 103762 | 54953 |
| 2007 | 33418159 | 5423738 | 2462824 | 1150061 | 850608 | 369692 | 158824 | 63857 | 63972 |
| 2008 | 28900895 | 6221247 | 1805271 | 1117149 | 537283 | 389050 | 172372 | 69353 | 55910 |
| 2009 | 26504569 | 5331293 | 2115860 | 824075 | 509196 | 246854 | 169799 | 75005 | 53738 |
| 2010 | 40431602 | 4831988 | 1781451 | 956142 | 394043 | 235555 | 115374 | 73516 | 56842 |
| 2011 | 30159470 | 7555779 | 1631318 | 822167 | 481815 | 198187 | 118426 | 58958 | 65991 |
| 2012 | 25776491 | 5549622 | 2624097 | 807596 | 416577 | 246512 | 101224 | 58325 | 65031 |
| 2013 | 38656776 | 4724020 | 1887342 | 1265200 | 406199 | 202430 | 121671 | 49053 | 59304 |
| 2014 | 24920642 | 7278329 | 1598940 | 894614 | 618949 | 190164 | 95553 | 56778 | 51081 |
| 2015 | 17491770 | 4593013 | 2567290 | 776013 | 454729 | 295011 | 95897 | 47330 | 55054 |
| 2016 | 19229086 | 3193866 | 1572022 | 1254245 | 388367 | 224088 | 139766 | 44977 | 47727 |
| 2017 | 17638791 | 3562198 | 1063917 | 694036 | 608391 | 183911 | 103716 | 58159 | 37557 |
| 2018 | 15398485 | 3264113 | 1209707 | 474395 | 319351 | 287409 | 81035 | 40593 | 35262 |
| 2019 | 15863216 | 2843471 | 1095983 | 514697 | 227028 | 151075 | 131103 | 34567 | 32274 |
| 2020 | 11155386 | 2948756 | 976717 | 494855 | 256994 | 116495 | 76187 | 62930 | 32823 |
| 2021 | 7452740 | 2070489 | 1019036 | 466143 | 249564 | 130406 | 59266 | 35476 | 45769 |
| 2022 | 16865833 | 1340359 | 728653 | 476367 | 244479 | 129301 | 71416 | 32074 | 44610 |
| 2023 | 12072927 | 3171936 | 461394 | 378658 | 256320 | 135878 | 71391 | 41099 | 44057 |
| 2024 | 13607312 | 2214524 | 1121542 | 233704 | 208579 | 144940 | 80302 | 41989 | 52240 |