| Table 3. Estimated stock numbers at age. | ||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 1960 | 87058 | 87984 | 63901 | 27347 | 30117 | 18258 | 11864 | 7936 | 4035 | 12362 |
| 1961 | 108094 | 57689 | 75113 | 31393 | 16228 | 17160 | 10480 | 7863 | 5736 | 12348 |
| 1962 | 220193 | 62696 | 32597 | 51319 | 19714 | 12785 | 12230 | 7143 | 5937 | 14209 |
| 1963 | 348759 | 142718 | 33761 | 26752 | 30800 | 12436 | 10577 | 8823 | 5240 | 15144 |
| 1964 | 67203 | 274915 | 72359 | 19055 | 19412 | 20161 | 8480 | 8261 | 6779 | 16416 |
| 1965 | 296321 | 37944 | 127690 | 48431 | 14183 | 12392 | 13641 | 5166 | 5761 | 16006 |
| 1966 | 140431 | 221288 | 39262 | 61816 | 27357 | 9457 | 7690 | 7549 | 3301 | 14820 |
| 1967 | 181418 | 87676 | 128482 | 19951 | 33907 | 16479 | 6825 | 5580 | 4719 | 11904 |
| 1968 | 115574 | 123433 | 42509 | 71950 | 12733 | 23029 | 10422 | 4592 | 3561 | 8873 |
| 1969 | 310612 | 67663 | 93170 | 31481 | 46737 | 11494 | 18435 | 7331 | 3101 | 6743 |
| 1970 | 230297 | 200400 | 50035 | 62724 | 22390 | 34237 | 10517 | 15799 | 5346 | 7578 |
| 1971 | 243612 | 157949 | 83467 | 32649 | 34299 | 13369 | 18136 | 7494 | 10395 | 8225 |
| 1972 | 146039 | 149641 | 95167 | 42405 | 22812 | 18756 | 9588 | 10492 | 4958 | 10291 |
| 1973 | 204496 | 72353 | 85426 | 57402 | 26272 | 15742 | 12361 | 7508 | 6430 | 9324 |
| 1974 | 92989 | 111572 | 40274 | 56696 | 36916 | 16396 | 10940 | 8508 | 4728 | 8816 |
| 1975 | 169228 | 37499 | 52168 | 17586 | 25383 | 20096 | 9377 | 6622 | 5143 | 7108 |
| 1976 | 241210 | 74153 | 19470 | 27099 | 10163 | 11218 | 8880 | 4829 | 3230 | 5613 |
| 1977 | 202522 | 88933 | 30317 | 8254 | 14285 | 5396 | 5788 | 4246 | 2364 | 3940 |
| 1978 | 143339 | 80191 | 36901 | 15809 | 4729 | 7479 | 3215 | 3185 | 2415 | 4118 |
| 1979 | 196267 | 63169 | 39099 | 16266 | 8638 | 2405 | 4229 | 1726 | 1548 | 3451 |
| 1980 | 117376 | 92607 | 22827 | 17139 | 8819 | 3906 | 1080 | 2124 | 909 | 2692 |
| 1981 | 270801 | 56482 | 48425 | 9757 | 8338 | 4708 | 1867 | 627 | 1082 | 1757 |
| 1982 | 116512 | 155093 | 26514 | 20776 | 4450 | 4457 | 2246 | 1047 | 358 | 1591 |
| 1983 | 111089 | 59377 | 71357 | 8835 | 9272 | 2625 | 2521 | 1214 | 608 | 1236 |
| 1984 | 80099 | 68528 | 27322 | 25047 | 3668 | 4629 | 1315 | 1330 | 671 | 1019 |
| 1985 | 78418 | 34691 | 22193 | 12324 | 8617 | 1781 | 2103 | 555 | 593 | 773 |
| 1986 | 204393 | 38774 | 17214 | 11868 | 5895 | 3150 | 861 | 943 | 254 | 574 |
| 1987 | 158621 | 164441 | 16976 | 8631 | 6437 | 2513 | 1146 | 409 | 401 | 370 |
| 1988 | 80774 | 114888 | 90047 | 10212 | 4045 | 2435 | 1273 | 370 | 174 | 277 |
| 1989 | 77418 | 53194 | 76241 | 43983 | 4701 | 1353 | 928 | 575 | 114 | 207 |
| 1990 | 77686 | 47209 | 26323 | 27829 | 18562 | 2380 | 664 | 491 | 321 | 177 |
| 1991 | 203184 | 44517 | 20617 | 14684 | 12006 | 8144 | 1258 | 340 | 270 | 274 |
| 1992 | 313828 | 128720 | 19649 | 11544 | 8849 | 6260 | 4342 | 683 | 188 | 319 |
| 1993 | 197350 | 239317 | 87360 | 9583 | 4487 | 3498 | 2465 | 2194 | 307 | 233 |
| 1994 | 194345 | 146624 | 151245 | 42875 | 4363 | 1832 | 1577 | 965 | 1164 | 266 |
| 1995 | 302408 | 184082 | 121645 | 86577 | 14553 | 1872 | 846 | 809 | 410 | 758 |
| 1996 | 134730 | 282313 | 85934 | 66148 | 48889 | 8006 | 1059 | 498 | 460 | 696 |
| 1997 | 157045 | 95690 | 196191 | 57847 | 44335 | 26287 | 4160 | 538 | 272 | 629 |
| 1998 | 117111 | 136239 | 70334 | 140126 | 32263 | 25152 | 14271 | 2643 | 334 | 582 |
| 1999 | 261442 | 87109 | 108732 | 46444 | 76612 | 17646 | 16264 | 9020 | 1623 | 575 |
| 2000 | 124378 | 212993 | 52713 | 56563 | 28731 | 41695 | 12169 | 11390 | 5154 | 1287 |
| 2001 | 207024 | 84200 | 164436 | 40041 | 34606 | 17851 | 25122 | 8329 | 7268 | 3688 |
| 2002 | 436853 | 159207 | 67077 | 111523 | 27141 | 21612 | 12672 | 16189 | 5143 | 6996 |
| 2003 | 140658 | 440800 | 97214 | 43405 | 53856 | 20361 | 14317 | 9633 | 9950 | 7613 |
| 2004 | 205056 | 97824 | 252330 | 66596 | 34143 | 34784 | 12185 | 8669 | 6468 | 10316 |
| 2005 | 485454 | 125264 | 70036 | 124654 | 48786 | 23167 | 25749 | 8126 | 4035 | 7705 |
| 2006 | 62379 | 427124 | 76869 | 44445 | 67010 | 28940 | 16702 | 14736 | 4585 | 6427 |
| 2007 | 118777 | 38256 | 219683 | 57318 | 28472 | 35789 | 20880 | 10044 | 6855 | 4097 |
| 2008 | 183808 | 81272 | 29997 | 98453 | 31609 | 15872 | 20226 | 12082 | 4743 | 4930 |
| 2009 | 165349 | 145026 | 42819 | 22829 | 55999 | 14877 | 7965 | 9951 | 6048 | 4286 |
| 2010 | 271889 | 120481 | 90963 | 27443 | 12369 | 33626 | 7745 | 3824 | 4120 | 4474 |
| 2011 | 108202 | 188882 | 48958 | 47111 | 17694 | 7855 | 16268 | 4085 | 1885 | 3797 |
| 2012 | 131100 | 86009 | 124712 | 32857 | 23453 | 9935 | 4385 | 7683 | 1941 | 2785 |
| 2013 | 205677 | 79791 | 64362 | 81207 | 19408 | 12513 | 5132 | 2449 | 3746 | 2452 |
| 2014 | 100842 | 158042 | 56015 | 40638 | 46916 | 11669 | 7343 | 3254 | 1449 | 3502 |
| 2015 | 155290 | 80113 | 119303 | 37795 | 27323 | 27425 | 6609 | 4052 | 2032 | 3121 |
| 2016 | 281240 | 113567 | 53572 | 63756 | 23911 | 16695 | 15125 | 3714 | 2661 | 3966 |
| 2017 | 179311 | 237628 | 70122 | 31998 | 34917 | 14388 | 9601 | 7656 | 1961 | 4883 |
| 2018 | 131999 | 141507 | 194737 | 50905 | 20494 | 19159 | 8785 | 5671 | 4155 | 4340 |
| 2019 | 251461 | 119885 | 93006 | 115591 | 31193 | 11954 | 10296 | 4787 | 2917 | 4692 |
| 2020 | 111714 | 235120 | 85255 | 65279 | 67379 | 18031 | 7165 | 5711 | 2667 | 4758 |
| 2021 | 157332 | 86107 | 174621 | 59114 | 39681 | 37199 | 10053 | 4159 | 3269 | 5049 |
| 2022 | 121097 | 125677 | 73682 | 120732 | 40296 | 21734 | 17583 | 4717 | 2040 | 4907 |
| 2023 | 61655 | 91752 | 103437 | 50569 | 59127 | 22336 | 12938 | 8873 | 2432 | 3717 |
| 2024 | 160641 | 49502 | 65051 | 55013 | 27393 | 27011 | 10705 | 6026 | 4341 | 2995 |
| 2025 | 192648 | 128277 | 32652 | 36710 | 25004 | 12645 | 11501 | 5030 | 2695 | 3597 |
| pred | 145130 | 82073 | 18238 | 18655 | 12638 | 6538 | 5947 | 2600 | 3253 | |