| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 28515389 | 8449172 | 1785155 | 793677 | 222677 | 18922 | 12207 | 2980 | 456 |
| 1979 | 21899451 | 8663524 | 2204157 | 626289 | 268831 | 69116 | 5632 | 3162 | 719 |
| 1980 | 13739549 | 6858398 | 2426076 | 760500 | 199174 | 84414 | 19562 | 1614 | 1124 |
| 1981 | 12696445 | 3661343 | 2009374 | 867450 | 230790 | 54073 | 19327 | 4609 | 563 |
| 1982 | 9722584 | 3177793 | 821831 | 778522 | 276031 | 61326 | 11905 | 3926 | 966 |
| 1983 | 11896370 | 2417864 | 722738 | 315737 | 291263 | 92512 | 16258 | 3132 | 1386 |
| 1984 | 10864448 | 3418186 | 582951 | 267114 | 100956 | 92777 | 24882 | 4413 | 1113 |
| 1985 | 16028279 | 2849041 | 945470 | 209643 | 77709 | 27429 | 23131 | 5428 | 1283 |
| 1986 | 15459564 | 5079733 | 802372 | 382460 | 73781 | 23487 | 6322 | 5390 | 1182 |
| 1987 | 13932935 | 4664544 | 1507666 | 292229 | 127090 | 18558 | 5332 | 1309 | 1336 |
| 1988 | 17039315 | 4049006 | 1476999 | 538759 | 88111 | 32070 | 3449 | 937 | 374 |
| 1989 | 11046838 | 5568686 | 987090 | 569226 | 167673 | 24248 | 7711 | 842 | 413 |
| 1990 | 10258599 | 3074234 | 1707300 | 371054 | 196658 | 45755 | 5039 | 1714 | 259 |
| 1991 | 11616656 | 2780359 | 797718 | 663796 | 110086 | 56183 | 12691 | 1438 | 575 |
| 1992 | 13356736 | 3246871 | 850841 | 306124 | 261881 | 32811 | 16249 | 4619 | 445 |
| 1993 | 13120355 | 3717703 | 870758 | 343917 | 119269 | 92782 | 9739 | 4879 | 1703 |
| 1994 | 12005036 | 3553583 | 995083 | 322637 | 115643 | 40906 | 28196 | 3037 | 1508 |
| 1995 | 9566922 | 3100577 | 982482 | 384130 | 110245 | 35407 | 11276 | 8792 | 1224 |
| 1996 | 7638385 | 2163468 | 820670 | 391073 | 142159 | 36130 | 11032 | 3671 | 3285 |
| 1997 | 10975896 | 1630333 | 535780 | 343989 | 144456 | 51949 | 11770 | 3869 | 1948 |
| 1998 | 16397251 | 2387552 | 414741 | 224865 | 140319 | 54189 | 19631 | 4829 | 1867 |
| 1999 | 16051031 | 3573766 | 613054 | 171235 | 102723 | 56514 | 21314 | 7526 | 2273 |
| 2000 | 13351402 | 3072735 | 934821 | 243962 | 72650 | 38643 | 20797 | 8745 | 3485 |
| 2001 | 13399404 | 2433648 | 977928 | 378495 | 98161 | 25414 | 14283 | 7440 | 4547 |
| 2002 | 9192896 | 2388172 | 718102 | 519609 | 172199 | 39491 | 9114 | 5889 | 3810 |
| 2003 | 8000115 | 1377798 | 576524 | 364985 | 259078 | 78045 | 16636 | 3840 | 3130 |
| 2004 | 7943963 | 1136097 | 264738 | 251647 | 184781 | 118634 | 38071 | 8106 | 2469 |
| 2005 | 7540124 | 1162348 | 282497 | 107856 | 123047 | 94674 | 54579 | 18142 | 4413 |
| 2006 | 6084871 | 1120229 | 329649 | 119100 | 52559 | 65728 | 47846 | 25236 | 8619 |
| 2007 | 7693042 | 814625 | 306932 | 147120 | 52099 | 24485 | 32343 | 22086 | 14692 |
| 2008 | 7264215 | 1187030 | 216083 | 138346 | 66542 | 22915 | 11371 | 15326 | 18868 |
| 2009 | 6614006 | 1209386 | 317776 | 89805 | 58765 | 32529 | 10908 | 5357 | 16658 |
| 2010 | 6942287 | 1125083 | 370349 | 128443 | 42292 | 27748 | 14338 | 4414 | 10010 |
| 2011 | 5729777 | 1183570 | 371655 | 168448 | 60570 | 18899 | 10914 | 5121 | 5976 |
| 2012 | 5267797 | 824457 | 380909 | 162313 | 80918 | 28315 | 8226 | 4198 | 5757 |
| 2013 | 7672019 | 658618 | 216623 | 184385 | 80273 | 34153 | 11768 | 3129 | 4482 |
| 2014 | 8971167 | 1107262 | 199781 | 103852 | 92336 | 36090 | 13651 | 4922 | 3992 |
| 2015 | 8864094 | 1255884 | 382465 | 84762 | 50608 | 41322 | 13702 | 5217 | 4154 |
| 2016 | 10245733 | 1217216 | 389083 | 155730 | 38444 | 20751 | 14910 | 5307 | 3927 |
| 2017 | 7232045 | 1593485 | 375879 | 154149 | 60532 | 15731 | 6888 | 5799 | 4087 |
| 2018 | 9002720 | 1001426 | 460079 | 160615 | 63943 | 23229 | 5376 | 2744 | 3338 |
| 2019 | 14996462 | 1496570 | 299313 | 201683 | 73312 | 25198 | 7858 | 2313 | 2065 |
| 2020 | 14751605 | 3147462 | 430371 | 141289 | 92907 | 28055 | 8894 | 2754 | 1080 |
| 2021 | 8774665 | 3103611 | 1109273 | 192482 | 72146 | 38202 | 11646 | 3971 | 1003 |
| 2022 | 10631210 | 1491162 | 1112040 | 564449 | 97121 | 34184 | 16932 | 5531 | 2150 |
| 2023 | 8874982 | 2168261 | 537784 | 582989 | 320781 | 48818 | 15714 | 9289 | 3503 |
| 2024 | 12450114 | 1603948 | 680856 | 278583 | 368871 | 184105 | 23716 | 8071 | 5607 |
| 2025 | 12450114 | 2507667 | 503345 | 341200 | 157579 | 210574 | 98913 | 14249 | 8289 |