| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 1958 | 819680 | 59911 | 376125 | 199196 | 104235 | 196894 | 108436 | 117129 | 177831 |
| 1959 | 1351559 | 369648 | 39890 | 223360 | 110518 | 66691 | 126143 | 66711 | 207047 |
| 1960 | 512250 | 688195 | 210475 | 36194 | 137369 | 60905 | 45319 | 80750 | 188195 |
| 1961 | 485568 | 219939 | 449044 | 96463 | 28175 | 85640 | 40647 | 29392 | 189622 |
| 1962 | 783087 | 210631 | 124190 | 335386 | 59223 | 21559 | 58456 | 28364 | 152391 |
| 1963 | 399375 | 401262 | 133568 | 56439 | 214559 | 34141 | 13583 | 36053 | 124029 |
| 1964 | 1399636 | 178368 | 230127 | 89231 | 37045 | 135718 | 21738 | 9066 | 114405 |
| 1965 | 371533 | 698140 | 102675 | 147140 | 47693 | 32091 | 92055 | 14402 | 92506 |
| 1966 | 764311 | 177896 | 420039 | 65164 | 84273 | 31407 | 22399 | 58391 | 71760 |
| 1967 | 840237 | 349755 | 110509 | 233998 | 41712 | 45893 | 17977 | 14643 | 82406 |
| 1968 | 935559 | 379524 | 215122 | 64156 | 119674 | 24474 | 23628 | 9527 | 61496 |
| 1969 | 504492 | 433726 | 209654 | 122276 | 42296 | 64403 | 14361 | 12803 | 44983 |
| 1970 | 261019 | 226324 | 219623 | 96789 | 61751 | 24041 | 30280 | 7238 | 34961 |
| 1971 | 783498 | 114390 | 123181 | 115952 | 46513 | 29946 | 12413 | 14728 | 25118 |
| 1972 | 303290 | 392203 | 57838 | 56321 | 46787 | 18428 | 12911 | 5644 | 21360 |
| 1973 | 309696 | 129375 | 175897 | 26274 | 28671 | 20842 | 9029 | 6530 | 16873 |
| 1974 | 160610 | 135797 | 54804 | 76205 | 14896 | 13499 | 10018 | 4354 | 14374 |
| 1975 | 178096 | 68389 | 57919 | 23758 | 32615 | 8593 | 6484 | 4751 | 12087 |
| 1976 | 217533 | 75529 | 33489 | 23680 | 11093 | 14787 | 4091 | 3093 | 10350 |
| 1977 | 186434 | 94987 | 42580 | 19626 | 9832 | 5928 | 6628 | 1906 | 7693 |
| 1978 | 143959 | 81678 | 55373 | 23567 | 8594 | 5872 | 2978 | 3428 | 5991 |
| 1979 | 218139 | 63256 | 43653 | 29437 | 11529 | 4557 | 3474 | 1604 | 5672 |
| 1980 | 150804 | 97943 | 31285 | 20584 | 12867 | 5708 | 2219 | 1833 | 4301 |
| 1981 | 389349 | 61594 | 43101 | 11821 | 9727 | 6820 | 2404 | 954 | 3388 |
| 1982 | 645301 | 165605 | 22631 | 11855 | 3600 | 3562 | 2607 | 801 | 2099 |
| 1983 | 773237 | 294433 | 77497 | 8763 | 4514 | 1240 | 1258 | 1046 | 1321 |
| 1984 | 690245 | 357217 | 122815 | 31892 | 3755 | 1827 | 587 | 509 | 1006 |
| 1985 | 627179 | 306805 | 174139 | 55288 | 9206 | 1051 | 505 | 203 | 641 |
| 1986 | 654484 | 273583 | 159569 | 106062 | 25351 | 4614 | 551 | 238 | 451 |
| 1987 | 1019629 | 302340 | 133685 | 71019 | 44149 | 10498 | 2548 | 305 | 491 |
| 1988 | 513858 | 507227 | 154012 | 53744 | 30160 | 17627 | 4722 | 1264 | 390 |
| 1989 | 587559 | 232724 | 298034 | 79072 | 32707 | 15933 | 9379 | 2719 | 1007 |
| 1990 | 482402 | 267723 | 122648 | 167133 | 37837 | 18317 | 7844 | 4497 | 1793 |
| 1991 | 231647 | 230420 | 149842 | 64551 | 96708 | 19418 | 11076 | 4124 | 3218 |
| 1992 | 903535 | 97356 | 107870 | 76912 | 31340 | 49235 | 9529 | 6305 | 3647 |
| 1993 | 373528 | 459719 | 41020 | 47263 | 30780 | 13975 | 21088 | 4093 | 4388 |
| 1994 | 743453 | 165005 | 262152 | 19686 | 21784 | 19796 | 8192 | 11165 | 4941 |
| 1995 | 713490 | 344440 | 79482 | 131700 | 12887 | 12439 | 11179 | 4949 | 9293 |
| 1996 | 376368 | 333925 | 172968 | 35377 | 58166 | 7227 | 6156 | 5586 | 8383 |
| 1997 | 362420 | 168398 | 180927 | 97344 | 21622 | 25402 | 3872 | 3212 | 8017 |
| 1998 | 259605 | 169387 | 82573 | 84663 | 42416 | 10539 | 11560 | 1861 | 6640 |
| 1999 | 458167 | 111375 | 83991 | 34878 | 36312 | 18987 | 4808 | 5366 | 5419 |
| 2000 | 435420 | 208887 | 45450 | 29951 | 12848 | 13133 | 6707 | 1849 | 6080 |
| 2001 | 406832 | 196078 | 82828 | 16989 | 11960 | 5030 | 4549 | 2527 | 4960 |
| 2002 | 453231 | 177056 | 83979 | 25678 | 7797 | 5455 | 2232 | 1855 | 4707 |
| 2003 | 132602 | 224550 | 92616 | 38383 | 12498 | 5055 | 2924 | 1245 | 4369 |
| 2004 | 351655 | 53615 | 140704 | 51705 | 16386 | 4058 | 1767 | 1085 | 3197 |
| 2005 | 931806 | 161851 | 26181 | 62192 | 21030 | 6226 | 1488 | 662 | 2676 |
| 2006 | 412261 | 456593 | 79651 | 13829 | 28912 | 9647 | 2881 | 692 | 2193 |
| 2007 | 714793 | 184229 | 318281 | 45372 | 9342 | 15720 | 5135 | 1613 | 1778 |
| 2008 | 360352 | 339192 | 118044 | 203938 | 27582 | 6285 | 9105 | 3203 | 2447 |
| 2009 | 1043224 | 154745 | 225633 | 76746 | 131737 | 16842 | 4264 | 6351 | 4540 |
| 2010 | 802679 | 489993 | 97257 | 154265 | 52841 | 87603 | 11351 | 2940 | 8399 |
| 2011 | 1027119 | 370312 | 312034 | 57750 | 96255 | 36944 | 51478 | 7667 | 7893 |
| 2012 | 668802 | 488854 | 245171 | 186502 | 34539 | 57360 | 23643 | 30608 | 10743 |
| 2013 | 379511 | 302778 | 258715 | 130355 | 90969 | 19336 | 28770 | 13158 | 25697 |
| 2014 | 253858 | 169586 | 174009 | 138384 | 78845 | 47189 | 11748 | 16102 | 26750 |
| 2015 | 147143 | 108376 | 89718 | 88988 | 75559 | 42259 | 23096 | 6421 | 27685 |
| 2016 | 122940 | 71993 | 62018 | 43533 | 39997 | 34336 | 16929 | 9326 | 19638 |
| 2017 | 35192 | 58567 | 47437 | 22208 | 12530 | 10619 | 9043 | 4514 | 13980 |
| 2018 | 37983 | 14999 | 30125 | 8875 | 2763 | 1384 | 1078 | 974 | 8335 |
| 2019 | 121613 | 15673 | 4282 | 4894 | 1413 | 504 | 232 | 186 | 5205 |
| 2020 | 86114 | 54339 | 6756 | 1438 | 1585 | 538 | 204 | 85 | 3389 |
| 2021 | 4043 | 44922 | 36039 | 5412 | 1140 | 1093 | 390 | 156 | 2451 |
| 2022 | 26679 | 1598 | 31684 | 19280 | 3952 | 745 | 734 | 273 | 1916 |
| 2023 | 16328 | 13102 | 1338 | 22980 | 13679 | 2825 | 399 | 556 | 1485 |
| 2024 | 11892 | 7451 | 8762 | 758 | 16267 | 9273 | 1780 | 192 | 1331 |