| Table 3. Estimated stock numbers at age. | ||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 1960 | 81769 | 98467 | 56942 | 28410 | 27464 | 15230 | 11179 | 7845 | 3941 | 12707 |
| 1961 | 113359 | 55630 | 68837 | 31018 | 17324 | 16826 | 9807 | 7606 | 5534 | 11948 |
| 1962 | 222735 | 65229 | 34991 | 44574 | 19036 | 12643 | 12014 | 6879 | 5608 | 13211 |
| 1963 | 306903 | 139558 | 36787 | 24761 | 28551 | 12216 | 9804 | 8656 | 4978 | 14059 |
| 1964 | 71065 | 223652 | 77895 | 21639 | 17198 | 18875 | 8283 | 7339 | 6338 | 14383 |
| 1965 | 282760 | 45377 | 122246 | 46264 | 14188 | 11303 | 12317 | 5209 | 5020 | 14232 |
| 1966 | 132370 | 208705 | 34006 | 66298 | 27062 | 9193 | 7298 | 7375 | 3295 | 12664 |
| 1967 | 166206 | 83990 | 122674 | 19919 | 37498 | 16514 | 6215 | 4966 | 4633 | 10200 |
| 1968 | 138994 | 115523 | 46235 | 68614 | 13119 | 24517 | 10435 | 4103 | 3218 | 8661 |
| 1969 | 322442 | 81848 | 82003 | 31504 | 44892 | 10747 | 18245 | 7281 | 2805 | 7308 |
| 1970 | 212826 | 193392 | 55300 | 56705 | 22383 | 31463 | 8964 | 14222 | 5272 | 7447 |
| 1971 | 236640 | 147727 | 92080 | 34475 | 33496 | 14206 | 18334 | 6213 | 9244 | 8066 |
| 1972 | 158660 | 144579 | 89518 | 47769 | 22759 | 19829 | 9501 | 10819 | 4052 | 10308 |
| 1973 | 202117 | 78292 | 82854 | 54988 | 28461 | 15425 | 12854 | 6668 | 6698 | 9013 |
| 1974 | 92998 | 111163 | 41759 | 49891 | 34847 | 17224 | 10293 | 8326 | 4210 | 9294 |
| 1975 | 167382 | 40176 | 53345 | 19692 | 25074 | 18718 | 9513 | 5968 | 4741 | 7241 |
| 1976 | 250737 | 73613 | 19034 | 26757 | 10627 | 11844 | 8975 | 4790 | 3004 | 5781 |
| 1977 | 217102 | 89901 | 30721 | 8382 | 13895 | 5468 | 5913 | 4422 | 2387 | 4235 |
| 1978 | 136753 | 85776 | 38104 | 15137 | 4610 | 7525 | 3175 | 3240 | 2484 | 3946 |
| 1979 | 196299 | 59807 | 39106 | 17214 | 7966 | 2358 | 4117 | 1722 | 1652 | 3446 |
| 1980 | 116144 | 94320 | 23865 | 17055 | 8665 | 3800 | 1155 | 2114 | 911 | 2692 |
| 1981 | 263891 | 56893 | 45833 | 10135 | 8399 | 4449 | 1938 | 654 | 1108 | 1855 |
| 1982 | 119551 | 145937 | 25304 | 19984 | 4733 | 4432 | 2311 | 1077 | 369 | 1657 |
| 1983 | 88704 | 64168 | 62977 | 9613 | 9274 | 2561 | 2504 | 1272 | 614 | 1212 |
| 1984 | 95994 | 56824 | 29399 | 23153 | 4147 | 4565 | 1303 | 1316 | 688 | 987 |
| 1985 | 111865 | 39744 | 21894 | 12208 | 7873 | 1848 | 2072 | 567 | 593 | 766 |
| 1986 | 172418 | 48542 | 17303 | 10866 | 5685 | 2809 | 866 | 921 | 256 | 589 |
| 1987 | 147010 | 141055 | 22249 | 8655 | 5555 | 2578 | 1044 | 405 | 401 | 387 |
| 1988 | 72035 | 110202 | 84013 | 11589 | 3817 | 2164 | 1184 | 343 | 168 | 294 |
| 1989 | 70936 | 52122 | 63380 | 42533 | 5104 | 1360 | 898 | 541 | 114 | 216 |
| 1990 | 85014 | 44346 | 27163 | 27478 | 18927 | 2424 | 684 | 484 | 303 | 185 |
| 1991 | 260814 | 45362 | 20374 | 14094 | 11688 | 8498 | 1262 | 348 | 263 | 265 |
| 1992 | 322113 | 146349 | 21027 | 10481 | 7457 | 5376 | 4612 | 669 | 188 | 300 |
| 1993 | 223387 | 240266 | 82781 | 10163 | 4375 | 3127 | 2270 | 2275 | 307 | 227 |
| 1994 | 155655 | 168880 | 150132 | 40184 | 4385 | 1779 | 1491 | 952 | 1156 | 262 |
| 1995 | 287673 | 145114 | 119210 | 84464 | 16156 | 1880 | 852 | 764 | 425 | 740 |
| 1996 | 150358 | 257289 | 88095 | 68565 | 44068 | 8099 | 1044 | 490 | 432 | 679 |
| 1997 | 178733 | 108819 | 182409 | 56477 | 41165 | 23181 | 4295 | 543 | 267 | 610 |
| 1998 | 103526 | 140448 | 76051 | 127937 | 32383 | 24217 | 13534 | 2604 | 334 | 558 |
| 1999 | 249740 | 80903 | 99510 | 49704 | 74334 | 18343 | 15311 | 8166 | 1553 | 544 |
| 2000 | 155098 | 200193 | 53593 | 57178 | 29856 | 41238 | 11558 | 9897 | 4779 | 1225 |
| 2001 | 198654 | 102549 | 149373 | 38206 | 34283 | 18575 | 24789 | 7455 | 6294 | 3579 |
| 2002 | 352915 | 162772 | 73800 | 100527 | 26263 | 21245 | 12419 | 15480 | 4673 | 6286 |
| 2003 | 139404 | 315311 | 109629 | 48783 | 58348 | 18291 | 13149 | 8378 | 9432 | 6799 |
| 2004 | 162783 | 108207 | 199346 | 75053 | 34407 | 37175 | 11315 | 7660 | 5221 | 9429 |
| 2005 | 516509 | 119808 | 72941 | 119182 | 52026 | 23473 | 22914 | 6932 | 4014 | 7665 |
| 2006 | 64078 | 378762 | 79770 | 45879 | 70939 | 32707 | 14866 | 13029 | 3918 | 6283 |
| 2007 | 100673 | 46755 | 213008 | 52573 | 28654 | 39009 | 19334 | 8342 | 6526 | 4598 |
| 2008 | 227265 | 72958 | 34600 | 110291 | 30866 | 16287 | 19940 | 10646 | 4234 | 5334 |
| 2009 | 138513 | 162972 | 42939 | 23762 | 60011 | 16135 | 7920 | 9469 | 5278 | 4438 |
| 2010 | 287472 | 98055 | 95974 | 27979 | 13617 | 33387 | 7985 | 3838 | 4316 | 4524 |
| 2011 | 106202 | 211081 | 49226 | 49970 | 16647 | 8001 | 16316 | 4039 | 1898 | 4154 |
| 2012 | 150222 | 90529 | 127751 | 31248 | 25725 | 9521 | 4318 | 7999 | 2003 | 3014 |
| 2013 | 225903 | 83871 | 66114 | 79078 | 18237 | 13607 | 5171 | 2379 | 4084 | 2629 |
| 2014 | 101280 | 176651 | 54405 | 42500 | 46015 | 10885 | 7790 | 3151 | 1398 | 3843 |
| 2015 | 160443 | 77424 | 121597 | 37129 | 27014 | 26605 | 6361 | 4475 | 1921 | 3215 |
| 2016 | 260298 | 114531 | 52477 | 68415 | 23548 | 16378 | 15179 | 3698 | 2791 | 3455 |
| 2017 | 176352 | 223268 | 76867 | 32049 | 37734 | 14131 | 9507 | 8225 | 2055 | 4060 |
| 2018 | 131132 | 148399 | 173276 | 51540 | 20340 | 20723 | 8425 | 5540 | 4610 | 3739 |
| 2019 | 253728 | 116963 | 98825 | 109464 | 30654 | 11744 | 11016 | 4675 | 2992 | 4682 |
| 2020 | 119577 | 221826 | 85925 | 66003 | 65214 | 17503 | 6872 | 6134 | 2652 | 4602 |
| 2021 | 152008 | 93920 | 166743 | 59956 | 40346 | 36423 | 9715 | 3934 | 3482 | 4472 |
| 2022 | 141993 | 123994 | 76511 | 110442 | 38643 | 22419 | 18336 | 4906 | 2037 | 4480 |
| 2023 | 58889 | 104325 | 94063 | 52041 | 59517 | 21326 | 12199 | 9363 | 2537 | 3481 |
| 2024 | 147519 | 44984 | 69913 | 55323 | 27627 | 27797 | 10463 | 5867 | 4542 | 2946 |
| 2025 | 206913 | 123708 | 31106 | 37874 | 26549 | 12891 | 12584 | 4974 | 2727 | 3602 |
| pred | 156514 | 79502 | 17452 | 19241 | 13197 | 6584 | 6427 | 2541 | 3232 | |