| Table 3. Estimated stock numbers at age. | ||||||||||
| Year Age | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1959 | 17334 | 12355 | 12096 | 2420 | 4305 | 627 | 523 | 162 | 27 | 0 |
| 1960 | 15937 | 14285 | 8729 | 6013 | 1200 | 1903 | 347 | 233 | 98 | 14 |
| 1961 | 23646 | 12571 | 7330 | 3689 | 2560 | 527 | 710 | 141 | 69 | 42 |
| 1962 | 24562 | 19904 | 7283 | 3492 | 1845 | 1143 | 245 | 231 | 54 | 49 |
| 1963 | 20656 | 20443 | 12666 | 3615 | 1728 | 760 | 515 | 132 | 89 | 52 |
| 1964 | 11040 | 17519 | 12706 | 6934 | 1741 | 840 | 345 | 231 | 81 | 74 |
| 1965 | 20974 | 8189 | 13297 | 7783 | 3550 | 839 | 380 | 130 | 123 | 78 |
| 1966 | 25504 | 17779 | 5473 | 8299 | 4043 | 1539 | 358 | 175 | 59 | 95 |
| 1967 | 21437 | 21490 | 13721 | 3640 | 5290 | 2097 | 675 | 113 | 58 | 70 |
| 1968 | 11863 | 18131 | 16434 | 8836 | 2442 | 3112 | 979 | 281 | 33 | 59 |
| 1969 | 9609 | 9429 | 13849 | 10829 | 4577 | 1212 | 1593 | 392 | 158 | 48 |
| 1970 | 12672 | 7575 | 6607 | 8544 | 6055 | 2238 | 558 | 724 | 126 | 88 |
| 1971 | 23043 | 10119 | 5649 | 4041 | 4784 | 3577 | 1163 | 238 | 376 | 109 |
| 1972 | 16783 | 20259 | 8399 | 4058 | 2486 | 2638 | 1654 | 513 | 85 | 229 |
| 1973 | 38472 | 12567 | 16418 | 6382 | 2769 | 1527 | 1077 | 764 | 319 | 192 |
| 1974 | 36624 | 33728 | 9037 | 9768 | 3828 | 1732 | 1057 | 507 | 406 | 291 |
| 1975 | 24764 | 30795 | 25299 | 6739 | 6574 | 2322 | 914 | 512 | 282 | 382 |
| 1976 | 11233 | 20915 | 23514 | 14043 | 3648 | 3595 | 1207 | 522 | 241 | 345 |
| 1977 | 14124 | 8495 | 15200 | 17625 | 7698 | 1680 | 1762 | 449 | 222 | 254 |
| 1978 | 16766 | 11616 | 6850 | 8907 | 9157 | 2919 | 643 | 501 | 148 | 202 |
| 1979 | 26021 | 13443 | 8592 | 5001 | 4616 | 4806 | 1360 | 286 | 210 | 181 |
| 1980 | 17654 | 22722 | 10792 | 5148 | 2742 | 2235 | 2280 | 704 | 114 | 199 |
| 1981 | 27725 | 13539 | 18192 | 6886 | 2795 | 1473 | 1066 | 1168 | 301 | 180 |
| 1982 | 30981 | 23308 | 10118 | 10905 | 3991 | 1413 | 690 | 416 | 539 | 244 |
| 1983 | 52850 | 24543 | 18018 | 6785 | 6035 | 2245 | 765 | 275 | 179 | 373 |
| 1984 | 22688 | 48176 | 18118 | 9102 | 3293 | 2468 | 821 | 214 | 81 | 256 |
| 1985 | 10281 | 18497 | 35559 | 10074 | 3985 | 1431 | 1260 | 409 | 99 | 190 |
| 1986 | 11564 | 7843 | 14319 | 20646 | 4990 | 1689 | 460 | 333 | 101 | 125 |
| 1987 | 11335 | 9570 | 6730 | 7973 | 9089 | 2079 | 602 | 159 | 140 | 108 |
| 1988 | 17231 | 8969 | 7927 | 4639 | 3851 | 4467 | 957 | 292 | 65 | 122 |
| 1989 | 5081 | 16029 | 6776 | 4600 | 2189 | 1766 | 1685 | 349 | 103 | 92 |
| 1990 | 6371 | 3716 | 11138 | 3585 | 1796 | 817 | 560 | 478 | 96 | 82 |
| 1991 | 10926 | 5091 | 2638 | 6168 | 1590 | 708 | 313 | 192 | 134 | 81 |
| 1992 | 11661 | 9282 | 3917 | 1716 | 2851 | 747 | 302 | 137 | 77 | 111 |
| 1993 | 27415 | 8978 | 7705 | 3107 | 961 | 1374 | 334 | 122 | 70 | 111 |
| 1994 | 43968 | 23124 | 7406 | 5516 | 2278 | 568 | 799 | 173 | 65 | 118 |
| 1995 | 12061 | 41755 | 17855 | 6161 | 3787 | 1577 | 375 | 587 | 118 | 126 |
| 1996 | 6250 | 9434 | 31960 | 13109 | 3320 | 2525 | 953 | 214 | 415 | 144 |
| 1997 | 7746 | 5112 | 7396 | 21813 | 7088 | 1125 | 894 | 259 | 52 | 178 |
| 1998 | 15292 | 6667 | 3934 | 5149 | 11948 | 2744 | 286 | 158 | 48 | 92 |
| 1999 | 24784 | 12807 | 5195 | 2754 | 3183 | 5208 | 804 | 86 | 33 | 59 |
| 2000 | 36235 | 20843 | 10443 | 2939 | 1566 | 1994 | 2137 | 209 | 21 | 42 |
| 2001 | 15222 | 34094 | 14759 | 6558 | 1441 | 1048 | 1368 | 934 | 79 | 38 |
| 2002 | 7437 | 13102 | 23464 | 8288 | 3420 | 842 | 680 | 627 | 417 | 57 |
| 2003 | 4804 | 5989 | 8035 | 11739 | 3676 | 1192 | 293 | 173 | 176 | 141 |
| 2004 | 7034 | 3715 | 4076 | 4470 | 4784 | 1272 | 346 | 96 | 59 | 142 |
| 2005 | 9153 | 6047 | 2737 | 2773 | 2838 | 1826 | 391 | 81 | 29 | 108 |
| 2006 | 5880 | 8017 | 3964 | 1526 | 1513 | 1421 | 622 | 127 | 23 | 80 |
| 2007 | 6111 | 4834 | 4805 | 2271 | 863 | 692 | 552 | 211 | 47 | 65 |
| 2008 | 10154 | 4786 | 3676 | 2673 | 1336 | 474 | 319 | 253 | 110 | 72 |
| 2009 | 15300 | 7530 | 5319 | 2273 | 1600 | 741 | 224 | 129 | 101 | 99 |
| 2010 | 5140 | 13046 | 5983 | 2355 | 1060 | 836 | 341 | 108 | 63 | 117 |
| 2011 | 1367 | 4042 | 8297 | 3195 | 932 | 435 | 302 | 115 | 42 | 102 |
| 2012 | 3233 | 1021 | 2587 | 4356 | 1406 | 372 | 182 | 127 | 44 | 94 |
| 2013 | 8249 | 2478 | 1180 | 1600 | 2111 | 570 | 121 | 66 | 45 | 82 |
| 2014 | 3257 | 7156 | 2446 | 953 | 1217 | 1019 | 255 | 58 | 32 | 80 |
| 2015 | 5246 | 2651 | 5251 | 1676 | 593 | 661 | 458 | 113 | 39 | 78 |
| 2016 | 6824 | 4252 | 2432 | 3143 | 828 | 343 | 305 | 160 | 42 | 73 |
| 2017 | 11924 | 5531 | 2950 | 2022 | 1860 | 440 | 192 | 126 | 62 | 73 |
| 2018 | 8992 | 10113 | 4363 | 2496 | 1581 | 1030 | 207 | 103 | 67 | 80 |
| 2019 | 2565 | 7237 | 6019 | 2641 | 1649 | 1065 | 362 | 64 | 36 | 77 |
| 2020 | 2870 | 1713 | 5114 | 2477 | 826 | 442 | 229 | 75 | 14 | 57 |
| 2021 | 7472 | 2229 | 1717 | 2431 | 764 | 236 | 102 | 55 | 19 | 43 |
| 2022 | 6487 | 6447 | 1736 | 1328 | 1063 | 250 | 77 | 37 | 29 | 38 |
| 2023 | 9508 | 5333 | 4482 | 1122 | 794 | 459 | 116 | 31 | 11 | 44 |
| 2024 | 8691 | 8134 | 3394 | 2775 | 788 | 545 | 246 | 74 | 18 | 43 |
| 2025 | 8371 | 7165 | 5865 | 2531 | 1878 | 489 | 382 | 134 | 33 | 45 |