| Table 3. Estimated stock numbers at age. | |||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
| 1978 | 29613390 | 8647220 | 1758332 | 806246 | 222808 | 15976 | 18702 |
| 1979 | 20498551 | 9634906 | 2249751 | 638853 | 277665 | 66541 | 10292 |
| 1980 | 11322172 | 6459094 | 2313395 | 780983 | 204004 | 91856 | 21602 |
| 1981 | 10947522 | 3262265 | 1904288 | 801329 | 235137 | 55342 | 27707 |
| 1982 | 8877868 | 3329885 | 822508 | 782869 | 252868 | 63312 | 20722 |
| 1983 | 13104720 | 2536309 | 852293 | 333408 | 304108 | 83584 | 24542 |
| 1984 | 10737503 | 4118205 | 650113 | 301804 | 107120 | 96978 | 30681 |
| 1985 | 17245597 | 3044643 | 1008796 | 235209 | 86155 | 27180 | 31549 |
| 1986 | 16194126 | 5555388 | 830420 | 416862 | 81944 | 23906 | 14577 |
| 1987 | 12549382 | 5045195 | 1464238 | 294271 | 140130 | 18483 | 8693 |
| 1988 | 17112054 | 3677778 | 1518223 | 525951 | 89615 | 31349 | 5008 |
| 1989 | 10361159 | 5602212 | 917303 | 562434 | 173840 | 24527 | 7943 |
| 1990 | 10683947 | 2993506 | 1699297 | 359669 | 198364 | 50300 | 6113 |
| 1991 | 13041054 | 3091641 | 749742 | 602541 | 114362 | 58010 | 12652 |
| 1992 | 14842996 | 3816335 | 837398 | 284464 | 254327 | 33455 | 20320 |
| 1993 | 14406351 | 4139428 | 866585 | 338734 | 116963 | 92799 | 16126 |
| 1994 | 13234052 | 3972190 | 975766 | 313089 | 112117 | 37469 | 33408 |
| 1995 | 9942284 | 3490080 | 992343 | 387504 | 103573 | 32774 | 19662 |
| 1996 | 7524689 | 2187116 | 806915 | 410136 | 147946 | 34302 | 15480 |
| 1997 | 11958823 | 1696770 | 502961 | 353103 | 147467 | 53263 | 15247 |
| 1998 | 19670815 | 2689974 | 422853 | 203871 | 135989 | 55272 | 24637 |
| 1999 | 20591481 | 4148325 | 669482 | 176007 | 99389 | 51312 | 30019 |
| 2000 | 15320442 | 3746860 | 1037695 | 255975 | 73711 | 36858 | 30315 |
| 2001 | 13316742 | 2657570 | 1016728 | 394622 | 96781 | 27585 | 22594 |
| 2002 | 6819838 | 2172110 | 759864 | 525541 | 179150 | 35873 | 18489 |
| 2003 | 6287543 | 1024052 | 607028 | 377304 | 274656 | 75598 | 21936 |
| 2004 | 6526225 | 942540 | 244944 | 242932 | 191011 | 124244 | 47911 |
| 2005 | 7197691 | 914382 | 268208 | 103732 | 122293 | 94113 | 82354 |
| 2006 | 5635405 | 1050991 | 287176 | 114841 | 50733 | 62939 | 90140 |
| 2007 | 8834999 | 722027 | 283671 | 138644 | 48844 | 23755 | 76692 |
| 2008 | 8978017 | 1125344 | 214937 | 130356 | 65475 | 20951 | 50639 |
| 2009 | 8822124 | 1258412 | 314582 | 89056 | 55147 | 30686 | 39149 |
| 2010 | 8070066 | 1198961 | 371263 | 127685 | 41006 | 26004 | 36080 |
| 2011 | 6199183 | 1066856 | 393082 | 160386 | 57702 | 18099 | 27438 |
| 2012 | 5172583 | 845033 | 367200 | 155177 | 75168 | 27417 | 21018 |
| 2013 | 8529381 | 620008 | 220127 | 189899 | 78636 | 33191 | 20861 |
| 2014 | 12707079 | 1163692 | 194658 | 105415 | 93931 | 35110 | 23552 |
| 2015 | 9722053 | 1548810 | 396822 | 83871 | 50131 | 43415 | 24292 |
| 2016 | 11951630 | 1230003 | 396638 | 165273 | 38131 | 22137 | 27007 |
| 2017 | 6966369 | 1708559 | 374490 | 151089 | 63739 | 15374 | 19331 |
| 2018 | 9194630 | 986793 | 500381 | 165855 | 65254 | 24300 | 13264 |
| 2019 | 18319705 | 1491622 | 331837 | 215523 | 75320 | 24007 | 15351 |
| 2020 | 17905104 | 3187242 | 461836 | 164965 | 98246 | 29718 | 15245 |
| 2021 | 8692265 | 3272328 | 1159241 | 204722 | 78414 | 40322 | 19959 |
| 2022 | 11507207 | 1460969 | 1109122 | 594894 | 104253 | 36507 | 28203 |
| 2023 | 7334808 | 2319232 | 553275 | 597512 | 339829 | 47436 | 32791 |
| 2024 | 16075808 | 1265326 | 765032 | 312437 | 384649 | 180915 | 38326 |
| 2025 | 16075808 | 3223463 | 467728 | 369983 | 174481 | 208761 | 119198 |