| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 29658604 | 8429568 | 1963886 | 823696 | 239419 | 21112 | 14339 | 3279 | 1077 |
| 1979 | 25272880 | 8576802 | 2264296 | 666215 | 278847 | 72163 | 6503 | 3988 | 1510 |
| 1980 | 10678492 | 7704912 | 2390497 | 800657 | 211191 | 88511 | 19892 | 1929 | 1940 |
| 1981 | 8900754 | 2810207 | 2190627 | 862539 | 256315 | 62023 | 21468 | 5452 | 1402 |
| 1982 | 6754055 | 2236790 | 656670 | 779022 | 248001 | 65169 | 13273 | 4677 | 2246 |
| 1983 | 9311651 | 1719819 | 525876 | 232626 | 237140 | 70203 | 15667 | 3363 | 2566 |
| 1984 | 8617035 | 2577728 | 427310 | 186707 | 69746 | 68684 | 17502 | 4132 | 1885 |
| 1985 | 16220210 | 2260979 | 713312 | 161963 | 59232 | 18706 | 16867 | 4012 | 1944 |
| 1986 | 17220889 | 4832800 | 610571 | 288861 | 56282 | 17790 | 4196 | 4389 | 1805 |
| 1987 | 14273012 | 5055797 | 1428137 | 234680 | 105723 | 14512 | 4477 | 1036 | 1814 |
| 1988 | 21407789 | 4034378 | 1578023 | 556126 | 90153 | 34207 | 3735 | 1231 | 1152 |
| 1989 | 12722928 | 6638724 | 1101516 | 652047 | 201250 | 27831 | 9638 | 1171 | 1287 |
| 1990 | 12625042 | 3559845 | 2007312 | 444516 | 253106 | 69127 | 7514 | 3300 | 1169 |
| 1991 | 12908009 | 3520197 | 1005662 | 862171 | 149926 | 81743 | 21568 | 2585 | 2052 |
| 1992 | 15987118 | 3544121 | 1069837 | 387752 | 342187 | 44353 | 22201 | 7811 | 1822 |
| 1993 | 15624179 | 4391717 | 975876 | 424835 | 144713 | 116513 | 11918 | 6691 | 4803 |
| 1994 | 14010713 | 4169566 | 1217480 | 371674 | 143437 | 47998 | 36481 | 3718 | 4119 |
| 1995 | 9992001 | 3569749 | 1192601 | 471733 | 130078 | 44998 | 13521 | 12548 | 3738 |
| 1996 | 7418528 | 2270932 | 957565 | 459040 | 172129 | 43022 | 13531 | 4489 | 8015 |
| 1997 | 10439787 | 1645076 | 570909 | 387142 | 164693 | 61209 | 13815 | 4886 | 5719 |
| 1998 | 17604466 | 2276400 | 433810 | 236630 | 152480 | 61686 | 22085 | 5669 | 5121 |
| 1999 | 20108810 | 3749232 | 610633 | 172237 | 102509 | 57175 | 22930 | 8244 | 5145 |
| 2000 | 15117779 | 3986340 | 1052393 | 257998 | 72819 | 40065 | 21674 | 9934 | 6116 |
| 2001 | 13286652 | 2826570 | 1208205 | 449159 | 116758 | 31315 | 17416 | 9423 | 9369 |
| 2002 | 6805200 | 2365286 | 797908 | 614520 | 206543 | 49032 | 11784 | 7448 | 8851 |
| 2003 | 6394532 | 1049279 | 573520 | 384056 | 285888 | 90251 | 20242 | 5114 | 8195 |
| 2004 | 6686686 | 981098 | 237493 | 245627 | 190022 | 127390 | 43000 | 9100 | 5671 |
| 2005 | 6346149 | 1023258 | 250026 | 93231 | 114374 | 87798 | 56243 | 20200 | 7530 |
| 2006 | 4932140 | 968186 | 279737 | 102438 | 43381 | 56802 | 41690 | 25383 | 12862 |
| 2007 | 6907686 | 705081 | 263342 | 126599 | 43898 | 19817 | 27953 | 19406 | 19777 |
| 2008 | 7128559 | 1063527 | 185430 | 115986 | 57798 | 19517 | 9030 | 14060 | 22747 |
| 2009 | 7167251 | 1172966 | 280692 | 76028 | 48743 | 26975 | 8643 | 4310 | 17867 |
| 2010 | 7483341 | 1204579 | 345084 | 114670 | 35370 | 22922 | 12027 | 3795 | 11032 |
| 2011 | 5218171 | 1242265 | 368272 | 158173 | 57222 | 17347 | 10835 | 5466 | 7703 |
| 2012 | 4933233 | 765082 | 382055 | 156797 | 80397 | 28337 | 8078 | 4854 | 7877 |
| 2013 | 8766863 | 671806 | 208154 | 184691 | 78847 | 35061 | 12154 | 3590 | 6428 |
| 2014 | 10019759 | 1321273 | 198733 | 102332 | 91221 | 36204 | 14839 | 5640 | 5648 |
| 2015 | 9744928 | 1434131 | 422385 | 87161 | 51303 | 42397 | 15437 | 6831 | 6083 |
| 2016 | 11366600 | 1413863 | 427251 | 180038 | 41843 | 22851 | 16570 | 6884 | 6417 |
| 2017 | 6947696 | 1798278 | 423968 | 173293 | 73162 | 17981 | 8293 | 7017 | 6816 |
| 2018 | 8869025 | 1055571 | 508529 | 175873 | 73099 | 27206 | 6269 | 3461 | 5550 |
| 2019 | 17870788 | 1529120 | 320824 | 220842 | 75653 | 27813 | 8709 | 2646 | 3684 |
| 2020 | 16764067 | 3602214 | 455863 | 154717 | 101092 | 31459 | 11204 | 3660 | 2229 |
| 2021 | 9379512 | 3371867 | 1238966 | 211306 | 79303 | 44828 | 14306 | 5345 | 2131 |
| 2022 | 10591672 | 1716786 | 1180113 | 632262 | 108898 | 36772 | 20392 | 6865 | 3982 |
| 2023 | 8625186 | 2111351 | 575551 | 618069 | 349136 | 52972 | 17512 | 11280 | 6684 |
| 2024 | 14012525 | 1618547 | 641187 | 282039 | 381172 | 190545 | 25730 | 9195 | 9875 |
| 2025 | 14012525 | 2813703 | 494946 | 322146 | 153560 | 201118 | 99713 | 14675 | 11905 |