| Table 3. Estimated stock numbers at age. | |||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
| 1978 | 29548516 | 8321472 | 1716354 | 802837 | 214332 | 15146 | 18155 |
| 1979 | 21147435 | 9507960 | 2124976 | 618624 | 269386 | 62962 | 9176 |
| 1980 | 11187684 | 6669469 | 2337192 | 730115 | 193886 | 83094 | 17725 |
| 1981 | 10688024 | 3284284 | 1885227 | 831115 | 213611 | 50527 | 21058 |
| 1982 | 8618097 | 3248473 | 832953 | 753965 | 269773 | 53206 | 14628 |
| 1983 | 13388220 | 2499049 | 835026 | 327864 | 283382 | 89820 | 15520 |
| 1984 | 10668995 | 4175996 | 639526 | 296079 | 105129 | 85895 | 25268 |
| 1985 | 17150620 | 3085722 | 1046176 | 230868 | 84950 | 27150 | 22275 |
| 1986 | 16841979 | 5416079 | 837291 | 421147 | 78585 | 23465 | 10964 |
| 1987 | 12053014 | 5261566 | 1440420 | 297647 | 141029 | 18144 | 6349 |
| 1988 | 17403852 | 3553635 | 1530179 | 521294 | 92439 | 35277 | 4204 |
| 1989 | 9848452 | 5616504 | 915878 | 562855 | 168851 | 26424 | 9011 |
| 1990 | 10594057 | 2867377 | 1655614 | 354033 | 196167 | 48407 | 8504 |
| 1991 | 12334167 | 3107682 | 731069 | 598209 | 111359 | 57537 | 13071 |
| 1992 | 14118483 | 3577872 | 826942 | 279988 | 240313 | 32989 | 19800 |
| 1993 | 14114304 | 3973742 | 845301 | 327956 | 111060 | 82496 | 15243 |
| 1994 | 12800654 | 3835688 | 963907 | 308303 | 109359 | 37244 | 23678 |
| 1995 | 9007915 | 3325813 | 968267 | 380893 | 102366 | 32946 | 16094 |
| 1996 | 7399573 | 2079705 | 791792 | 394427 | 143075 | 32945 | 14989 |
| 1997 | 11569869 | 1640769 | 492577 | 339241 | 140913 | 51195 | 15467 |
| 1998 | 18250600 | 2498616 | 405729 | 202623 | 131262 | 49733 | 23511 |
| 1999 | 18940927 | 3707943 | 615844 | 166619 | 94612 | 50688 | 25378 |
| 2000 | 14069493 | 3490891 | 923361 | 233092 | 66900 | 34676 | 25751 |
| 2001 | 12460647 | 2439132 | 925058 | 357758 | 86514 | 22902 | 20199 |
| 2002 | 6323097 | 2065064 | 676192 | 460479 | 156807 | 32670 | 15344 |
| 2003 | 6242689 | 937716 | 543810 | 327298 | 227573 | 64669 | 19264 |
| 2004 | 6480507 | 908946 | 224740 | 217113 | 158232 | 96855 | 36492 |
| 2005 | 7104751 | 903962 | 246010 | 93996 | 106186 | 76121 | 58151 |
| 2006 | 5237665 | 1002712 | 268170 | 103031 | 44965 | 54804 | 60074 |
| 2007 | 7968733 | 670945 | 266030 | 124082 | 42564 | 20551 | 50207 |
| 2008 | 8656378 | 1050818 | 195860 | 117454 | 56595 | 17345 | 31314 |
| 2009 | 8625644 | 1171811 | 293525 | 82687 | 50024 | 25658 | 20422 |
| 2010 | 7994839 | 1137449 | 347410 | 120215 | 37978 | 23553 | 18151 |
| 2011 | 5713551 | 1058151 | 361454 | 149793 | 53732 | 16848 | 15918 |
| 2012 | 4448052 | 753761 | 349707 | 146460 | 67954 | 24590 | 13258 |
| 2013 | 7653335 | 545088 | 205171 | 172325 | 70282 | 28557 | 14688 |
| 2014 | 9529689 | 1022564 | 173185 | 94739 | 83525 | 31172 | 15614 |
| 2015 | 7795840 | 1243337 | 341613 | 74698 | 44099 | 37728 | 16434 |
| 2016 | 10002445 | 1025645 | 341169 | 141595 | 32954 | 18540 | 18219 |
| 2017 | 6010340 | 1457563 | 320579 | 131849 | 53960 | 13201 | 11783 |
| 2018 | 8205199 | 856808 | 432176 | 142276 | 54856 | 19508 | 8237 |
| 2019 | 16256451 | 1274053 | 284081 | 183379 | 62764 | 20262 | 8821 |
| 2020 | 15340359 | 2817631 | 392739 | 135531 | 78623 | 23689 | 9527 |
| 2021 | 7277330 | 2803833 | 991320 | 171703 | 62622 | 30184 | 12282 |
| 2022 | 9143539 | 1261510 | 960149 | 500092 | 84729 | 28824 | 16844 |
| 2023 | 5758727 | 1856785 | 473365 | 507246 | 281652 | 40094 | 20998 |
| 2024 | 12614328 | 1041920 | 630656 | 253949 | 310929 | 148014 | 29778 |
| 2025 | 12614328 | 2540721 | 380373 | 304869 | 138588 | 167318 | 88844 |