| Table 3. Estimated stock numbers at age. | |||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
| 1978 | 29419911 | 8627408 | 1753906 | 824715 | 220925 | 16021 | 18653 |
| 1979 | 22229923 | 9393649 | 2207051 | 636703 | 280625 | 66912 | 10368 |
| 1980 | 11328999 | 7006863 | 2302464 | 771789 | 203944 | 89048 | 21370 |
| 1981 | 10905697 | 3355361 | 1958100 | 812296 | 236865 | 56214 | 27072 |
| 1982 | 8822335 | 3312401 | 854210 | 781976 | 259984 | 65756 | 21387 |
| 1983 | 13491113 | 2587088 | 854869 | 334962 | 298880 | 85359 | 26074 |
| 1984 | 10691556 | 4164135 | 662839 | 303748 | 108445 | 93369 | 31415 |
| 1985 | 17679376 | 3119653 | 1053495 | 237397 | 88372 | 27819 | 29923 |
| 1986 | 17119548 | 5544682 | 839117 | 421990 | 81866 | 24433 | 14696 |
| 1987 | 12281572 | 5310933 | 1471647 | 299994 | 138159 | 18972 | 8573 |
| 1988 | 18231027 | 3653714 | 1529450 | 535921 | 92619 | 31765 | 5290 |
| 1989 | 10143649 | 5806206 | 939810 | 571767 | 177667 | 25356 | 8150 |
| 1990 | 9933432 | 2993351 | 1698282 | 361547 | 203133 | 51776 | 7288 |
| 1991 | 11056214 | 2911029 | 779628 | 621295 | 116419 | 60590 | 14406 |
| 1992 | 12926669 | 3237915 | 787824 | 302503 | 244174 | 40074 | 23702 |
| 1993 | 12985165 | 3600744 | 807201 | 312719 | 118827 | 94171 | 22095 |
| 1994 | 12119874 | 3482861 | 908467 | 297962 | 110169 | 39944 | 37820 |
| 1995 | 9017807 | 3166760 | 879917 | 358084 | 105164 | 34544 | 23577 |
| 1996 | 7417795 | 2122963 | 817377 | 358260 | 137232 | 36539 | 18602 |
| 1997 | 12795374 | 1648283 | 542590 | 345437 | 137535 | 51991 | 18530 |
| 1998 | 20862490 | 2639428 | 414717 | 236730 | 140901 | 53760 | 26401 |
| 1999 | 21571701 | 4088540 | 652394 | 189582 | 108666 | 56292 | 31425 |
| 2000 | 17152761 | 3919938 | 989474 | 264096 | 83764 | 41883 | 33275 |
| 2001 | 16150456 | 2899652 | 1062451 | 403069 | 107204 | 33556 | 27647 |
| 2002 | 7727513 | 2575888 | 787439 | 531003 | 186741 | 45327 | 25406 |
| 2003 | 7677888 | 1152109 | 707254 | 387161 | 259655 | 86410 | 31741 |
| 2004 | 8225691 | 1115662 | 273491 | 291669 | 196193 | 122901 | 57706 |
| 2005 | 8182908 | 1136205 | 303477 | 116848 | 141645 | 98374 | 89091 |
| 2006 | 6129515 | 1171973 | 327482 | 127692 | 57857 | 70802 | 95390 |
| 2007 | 9171822 | 808580 | 316906 | 148585 | 59031 | 26288 | 81679 |
| 2008 | 10930866 | 1214609 | 231241 | 140311 | 70977 | 27229 | 53793 |
| 2009 | 10126987 | 1450595 | 340144 | 99379 | 64385 | 33693 | 41111 |
| 2010 | 9440116 | 1325268 | 404557 | 147337 | 45901 | 30270 | 36025 |
| 2011 | 6978606 | 1249443 | 401301 | 184036 | 67814 | 19712 | 29316 |
| 2012 | 5432104 | 922847 | 408280 | 174413 | 84097 | 31095 | 22402 |
| 2013 | 9017655 | 683523 | 255493 | 196148 | 86231 | 38150 | 23616 |
| 2014 | 11844980 | 1216127 | 210294 | 117848 | 98329 | 39545 | 26980 |
| 2015 | 10400359 | 1551909 | 401116 | 95722 | 55900 | 44894 | 28094 |
| 2016 | 12978967 | 1344518 | 452249 | 173464 | 44482 | 24667 | 30018 |
| 2017 | 7810556 | 1894426 | 409934 | 186364 | 75978 | 19229 | 23024 |
| 2018 | 10882392 | 1153052 | 595742 | 187909 | 82938 | 33098 | 18687 |
| 2019 | 22640542 | 1754851 | 382928 | 262296 | 90331 | 35543 | 23883 |
| 2020 | 21974016 | 3927306 | 572151 | 186115 | 119341 | 41143 | 27480 |
| 2021 | 10611335 | 4012719 | 1422353 | 257150 | 95137 | 54133 | 34423 |
| 2022 | 14050434 | 1884799 | 1405507 | 721575 | 133931 | 48678 | 46548 |
| 2023 | 8880831 | 2832115 | 685588 | 726249 | 416268 | 68975 | 53390 |
| 2024 | 17843369 | 1649971 | 975512 | 352490 | 442838 | 237260 | 67768 |
| 2025 | 17843369 | 3589577 | 593775 | 477778 | 201747 | 243739 | 175946 |