| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 28470550 | 7763061 | 1662972 | 735261 | 217049 | 18175 | 12490 | 2968 | 694 |
| 1979 | 23695328 | 8256974 | 2074375 | 570521 | 246807 | 64580 | 5436 | 3305 | 1032 |
| 1980 | 10679353 | 7204817 | 2266720 | 728686 | 180671 | 76638 | 16851 | 1514 | 1388 |
| 1981 | 8787270 | 2832992 | 2065127 | 830744 | 238813 | 54499 | 18969 | 4751 | 780 |
| 1982 | 6797394 | 2231163 | 678161 | 764506 | 250163 | 64592 | 12746 | 4365 | 1633 |
| 1983 | 9561854 | 1734334 | 531937 | 236474 | 240903 | 70587 | 14798 | 2959 | 2063 |
| 1984 | 8722718 | 2689280 | 427238 | 188595 | 70998 | 71034 | 16924 | 3774 | 1371 |
| 1985 | 15417256 | 2326338 | 727068 | 163048 | 59152 | 19268 | 18345 | 3955 | 1525 |
| 1986 | 17297004 | 4637334 | 632285 | 291664 | 55490 | 17370 | 4423 | 4788 | 1250 |
| 1987 | 13844905 | 5190518 | 1359429 | 237341 | 102905 | 13908 | 4202 | 1011 | 1560 |
| 1988 | 20626310 | 3946722 | 1598685 | 544110 | 85731 | 32222 | 3523 | 1109 | 732 |
| 1989 | 12053202 | 6470959 | 1069094 | 639575 | 191975 | 25644 | 8756 | 1013 | 977 |
| 1990 | 11998467 | 3358048 | 1992174 | 418218 | 234553 | 63488 | 6218 | 2681 | 836 |
| 1991 | 12809665 | 3319744 | 940573 | 815058 | 138715 | 75222 | 18599 | 1959 | 1525 |
| 1992 | 15168800 | 3503647 | 999987 | 361972 | 329028 | 41588 | 20361 | 7171 | 846 |
| 1993 | 15200212 | 4115247 | 961795 | 392929 | 135045 | 112751 | 11452 | 5900 | 4456 |
| 1994 | 13496690 | 4031516 | 1142238 | 358142 | 129709 | 43202 | 33396 | 3397 | 2860 |
| 1995 | 9993803 | 3419461 | 1142118 | 448774 | 123869 | 40657 | 12422 | 11032 | 2302 |
| 1996 | 7544400 | 2278610 | 940094 | 455542 | 171063 | 42597 | 13344 | 4271 | 6672 |
| 1997 | 10833775 | 1662435 | 586668 | 386561 | 167081 | 62956 | 14146 | 4852 | 4491 |
| 1998 | 17583538 | 2342980 | 436156 | 242806 | 153675 | 62145 | 22148 | 5636 | 3702 |
| 1999 | 20088058 | 3705654 | 627114 | 174275 | 103900 | 57636 | 23257 | 7952 | 4349 |
| 2000 | 14845411 | 3955059 | 1030024 | 259580 | 73672 | 39771 | 20699 | 9638 | 5058 |
| 2001 | 13345313 | 2735560 | 1169907 | 448802 | 112804 | 30039 | 16552 | 8439 | 8594 |
| 2002 | 7112719 | 2351193 | 775122 | 591912 | 203439 | 46394 | 11020 | 7002 | 6736 |
| 2003 | 6755406 | 1087229 | 588831 | 373625 | 278729 | 89803 | 19019 | 4521 | 6706 |
| 2004 | 7080692 | 1026938 | 246549 | 250591 | 185336 | 120787 | 41057 | 8497 | 4054 |
| 2005 | 6639871 | 1081237 | 260379 | 96674 | 116761 | 87732 | 51349 | 18687 | 6637 |
| 2006 | 5112593 | 1013896 | 292903 | 106038 | 44698 | 58935 | 41999 | 22498 | 11460 |
| 2007 | 6964010 | 736092 | 270171 | 130631 | 45246 | 20291 | 29077 | 19191 | 16467 |
| 2008 | 6933868 | 1076767 | 192329 | 118041 | 58128 | 19382 | 8910 | 14240 | 19275 |
| 2009 | 6924808 | 1145665 | 282781 | 77970 | 48871 | 26062 | 8286 | 4035 | 15393 |
| 2010 | 7471316 | 1176284 | 337970 | 116564 | 35839 | 22140 | 11499 | 3425 | 10310 |
| 2011 | 5161249 | 1266411 | 361530 | 157282 | 57716 | 17114 | 9858 | 4926 | 7185 |
| 2012 | 4855159 | 766554 | 391326 | 159452 | 78573 | 27610 | 7705 | 4175 | 7427 |
| 2013 | 8406230 | 669887 | 210939 | 186248 | 77435 | 33536 | 11369 | 3207 | 5974 |
| 2014 | 9866249 | 1269267 | 200716 | 102209 | 91123 | 34694 | 13363 | 4964 | 5275 |
| 2015 | 9537796 | 1421079 | 408792 | 86321 | 51019 | 42064 | 13945 | 5553 | 6050 |
| 2016 | 11013227 | 1387562 | 420960 | 172389 | 40809 | 22425 | 16068 | 6094 | 5604 |
| 2017 | 6826126 | 1731529 | 419448 | 170173 | 70454 | 17011 | 8027 | 6670 | 6147 |
| 2018 | 8796496 | 1025692 | 501824 | 174378 | 71650 | 26595 | 5910 | 3378 | 4790 |
| 2019 | 17952942 | 1493048 | 310318 | 215779 | 76606 | 27421 | 8769 | 2481 | 2666 |
| 2020 | 17270259 | 3593297 | 443092 | 147262 | 97601 | 30711 | 10561 | 3470 | 1686 |
| 2021 | 9554804 | 3450242 | 1200691 | 204684 | 75744 | 42026 | 13432 | 4905 | 1359 |
| 2022 | 10945574 | 1725061 | 1177403 | 613667 | 105106 | 35712 | 19020 | 6418 | 3379 |
| 2023 | 8693024 | 2147424 | 574733 | 611106 | 341963 | 49839 | 16822 | 10158 | 4737 |
| 2024 | 14288682 | 1606588 | 664938 | 281010 | 369967 | 188317 | 24058 | 8619 | 9369 |
| 2025 | 14288682 | 2840618 | 495804 | 330693 | 154077 | 201031 | 99438 | 13729 | 11065 |