| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 26662216 | 7227290 | 1653112 | 752398 | 224731 | 19191 | 13246 | 3528 | 1291 |
| 1979 | 19350871 | 8249358 | 2050690 | 583718 | 257313 | 69656 | 5944 | 3913 | 1893 |
| 1980 | 10094735 | 6125970 | 2387450 | 740096 | 187636 | 80725 | 19221 | 1832 | 2483 |
| 1981 | 9202382 | 2775885 | 1942998 | 874735 | 244381 | 56099 | 20348 | 5691 | 1743 |
| 1982 | 7045152 | 2485120 | 708842 | 767223 | 272598 | 68842 | 13674 | 5211 | 2904 |
| 1983 | 9655246 | 1882291 | 605349 | 270325 | 267880 | 85542 | 18061 | 3890 | 3777 |
| 1984 | 9131240 | 2878509 | 483175 | 224803 | 86424 | 85043 | 22849 | 5395 | 3357 |
| 1985 | 15647127 | 2550080 | 817738 | 184687 | 69788 | 23928 | 22839 | 5828 | 3497 |
| 1986 | 14645173 | 5040351 | 711705 | 333766 | 64762 | 21304 | 5754 | 6432 | 3120 |
| 1987 | 13190477 | 4536774 | 1493854 | 266946 | 116902 | 16773 | 5188 | 1424 | 3229 |
| 1988 | 16884271 | 3949759 | 1499226 | 556534 | 90588 | 35102 | 4013 | 1390 | 1787 |
| 1989 | 10108463 | 5576083 | 1043467 | 607825 | 185182 | 26485 | 9675 | 1279 | 1930 |
| 1990 | 9164903 | 2927391 | 1794419 | 397578 | 220052 | 58816 | 6697 | 3284 | 1702 |
| 1991 | 10980108 | 2607772 | 838897 | 742257 | 128949 | 70578 | 19074 | 2456 | 2595 |
| 1992 | 12654852 | 3167901 | 859862 | 328532 | 306387 | 40137 | 21637 | 8708 | 2094 |
| 1993 | 12803805 | 3614413 | 886477 | 360181 | 129123 | 110376 | 12449 | 7626 | 6482 |
| 1994 | 11228352 | 3585269 | 1051007 | 340872 | 125567 | 44520 | 36390 | 4519 | 5742 |
| 1995 | 8649020 | 2984297 | 1051368 | 421052 | 121783 | 41054 | 13698 | 13976 | 4910 |
| 1996 | 6757824 | 2069415 | 866844 | 433244 | 166298 | 43673 | 14451 | 5380 | 10955 |
| 1997 | 9809712 | 1557615 | 557294 | 372440 | 164284 | 64161 | 15723 | 6005 | 8108 |
| 1998 | 15823418 | 2254059 | 420904 | 239300 | 154878 | 64405 | 25191 | 7231 | 7446 |
| 1999 | 16409416 | 3603432 | 623131 | 176079 | 108263 | 63065 | 27009 | 10648 | 7685 |
| 2000 | 12420173 | 3422380 | 1031462 | 261491 | 76566 | 42756 | 24339 | 12532 | 9615 |
| 2001 | 11065473 | 2419929 | 1080304 | 435742 | 113044 | 31015 | 18337 | 10674 | 13763 |
| 2002 | 6770025 | 2056324 | 739123 | 573366 | 203941 | 49964 | 12683 | 8806 | 11199 |
| 2003 | 6268512 | 1114160 | 555408 | 376291 | 290136 | 97312 | 23239 | 6056 | 10695 |
| 2004 | 6449766 | 1033764 | 252413 | 254265 | 195352 | 135809 | 50360 | 12030 | 8204 |
| 2005 | 6344709 | 1059274 | 270267 | 103729 | 124852 | 98934 | 64689 | 26199 | 11996 |
| 2006 | 4914103 | 1058913 | 303792 | 114097 | 50441 | 66621 | 51180 | 31684 | 20516 |
| 2007 | 6576629 | 763170 | 286527 | 141183 | 50102 | 23956 | 34058 | 25224 | 28594 |
| 2008 | 6420580 | 1108322 | 203194 | 129946 | 64721 | 22470 | 10973 | 17298 | 31829 |
| 2009 | 6111272 | 1153013 | 300790 | 85067 | 55384 | 31120 | 10273 | 5256 | 24515 |
| 2010 | 6253020 | 1110360 | 358045 | 124339 | 40316 | 26340 | 14075 | 4483 | 16033 |
| 2011 | 4912214 | 1121388 | 366012 | 166113 | 61909 | 19641 | 11730 | 6093 | 11212 |
| 2012 | 4320222 | 796338 | 373658 | 163958 | 83269 | 30421 | 8999 | 5151 | 11030 |
| 2013 | 7181214 | 636012 | 214641 | 188980 | 81620 | 36173 | 13120 | 3937 | 9205 |
| 2014 | 8398900 | 1168132 | 199998 | 104889 | 95478 | 37870 | 15569 | 6163 | 8171 |
| 2015 | 8004632 | 1304533 | 392470 | 86906 | 53217 | 44814 | 15828 | 6874 | 8685 |
| 2016 | 9274036 | 1246990 | 404401 | 166439 | 41471 | 23338 | 17766 | 7248 | 8517 |
| 2017 | 6023871 | 1569263 | 401967 | 166023 | 68978 | 17969 | 8760 | 7927 | 8344 |
| 2018 | 8426779 | 949722 | 488902 | 174587 | 72683 | 28178 | 6827 | 4074 | 7275 |
| 2019 | 15358438 | 1545970 | 305118 | 218274 | 81266 | 30355 | 10455 | 3286 | 4760 |
| 2020 | 15124954 | 3311571 | 456842 | 150984 | 102981 | 33917 | 12669 | 4690 | 3382 |
| 2021 | 8363611 | 3272596 | 1177479 | 210347 | 80805 | 46722 | 16236 | 6715 | 3247 |
| 2022 | 10404094 | 1573212 | 1177794 | 624771 | 111324 | 40436 | 23499 | 8857 | 6031 |
| 2023 | 7614060 | 2212656 | 556276 | 621160 | 361395 | 56389 | 20738 | 13985 | 8639 |
| 2024 | 11985898 | 1468611 | 685258 | 289134 | 389954 | 209819 | 29821 | 11751 | 14627 |
| 2025 | 11985898 | 2523884 | 477871 | 343920 | 163339 | 222700 | 121595 | 18673 | 17851 |