| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 30442105 | 7900293 | 1737619 | 775684 | 230074 | 19511 | 13392 | 3549 | 1258 |
| 1979 | 22071005 | 9011966 | 2153857 | 601884 | 263344 | 70840 | 6005 | 3940 | 1850 |
| 1980 | 11642880 | 6679156 | 2509386 | 763512 | 191953 | 82172 | 19384 | 1845 | 2440 |
| 1981 | 10621385 | 3043435 | 2040799 | 903262 | 250331 | 57098 | 20563 | 5729 | 1683 |
| 1982 | 8115323 | 2726095 | 743669 | 792795 | 279117 | 70086 | 13834 | 5257 | 2845 |
| 1983 | 11012199 | 2058220 | 634580 | 279033 | 274506 | 87041 | 18235 | 3925 | 3722 |
| 1984 | 10446154 | 3130824 | 506737 | 232099 | 88634 | 86703 | 23085 | 5439 | 3274 |
| 1985 | 17779573 | 2778539 | 856419 | 191084 | 71614 | 24418 | 23150 | 5868 | 3426 |
| 1986 | 16653176 | 5485120 | 746192 | 344458 | 66517 | 21732 | 5822 | 6507 | 3040 |
| 1987 | 15104658 | 4932075 | 1569769 | 275803 | 119923 | 17100 | 5262 | 1437 | 3177 |
| 1988 | 19213707 | 4321077 | 1577330 | 576024 | 93019 | 35797 | 4064 | 1403 | 1722 |
| 1989 | 11619722 | 6078498 | 1097174 | 630683 | 190316 | 27051 | 9818 | 1289 | 1874 |
| 1990 | 10542323 | 3206222 | 1889134 | 412697 | 227040 | 60152 | 6797 | 3314 | 1639 |
| 1991 | 12697358 | 2852002 | 884170 | 771127 | 133040 | 72450 | 19411 | 2473 | 2533 |
| 1992 | 14654259 | 3486135 | 906291 | 341067 | 316103 | 41112 | 22049 | 8815 | 2000 |
| 1993 | 14879042 | 3981737 | 935948 | 374714 | 133422 | 113298 | 12702 | 7707 | 6440 |
| 1994 | 13117494 | 3960224 | 1112052 | 354424 | 129802 | 45808 | 37197 | 4573 | 5613 |
| 1995 | 10185237 | 3305543 | 1115113 | 438844 | 126039 | 42289 | 14053 | 14210 | 4773 |
| 1996 | 7991911 | 2300540 | 920722 | 452390 | 172340 | 45038 | 14863 | 5489 | 10878 |
| 1997 | 11585552 | 1734094 | 592445 | 389346 | 170357 | 66250 | 16167 | 6137 | 7950 |
| 1998 | 18653121 | 2509355 | 447708 | 250490 | 160829 | 66484 | 25912 | 7390 | 7265 |
| 1999 | 19368647 | 4010094 | 663826 | 184402 | 112655 | 65246 | 27780 | 10856 | 7578 |
| 2000 | 14763637 | 3800981 | 1101186 | 274539 | 79755 | 44298 | 25074 | 12819 | 9521 |
| 2001 | 13235579 | 2698053 | 1154483 | 458606 | 118060 | 32232 | 19000 | 10948 | 13756 |
| 2002 | 8186582 | 2303120 | 791085 | 605454 | 213218 | 51927 | 13122 | 9068 | 11136 |
| 2003 | 7552544 | 1255293 | 595527 | 397229 | 303769 | 101010 | 23958 | 6194 | 10596 |
| 2004 | 7731583 | 1159638 | 271002 | 268723 | 204623 | 141118 | 51826 | 12253 | 8014 |
| 2005 | 7595925 | 1181478 | 289956 | 109408 | 130555 | 102759 | 66461 | 26631 | 11826 |
| 2006 | 5901070 | 1180606 | 324811 | 120206 | 52647 | 69077 | 52618 | 32127 | 20345 |
| 2007 | 7851653 | 850739 | 306114 | 148622 | 52209 | 24768 | 34992 | 25640 | 28495 |
| 2008 | 7637288 | 1233544 | 216945 | 136703 | 67382 | 23179 | 11220 | 17625 | 31931 |
| 2009 | 7266322 | 1280196 | 320938 | 89240 | 57576 | 32116 | 10491 | 5328 | 24698 |
| 2010 | 7441044 | 1231781 | 382025 | 130329 | 41891 | 27162 | 14383 | 4534 | 16129 |
| 2011 | 5905484 | 1243938 | 390678 | 174445 | 64351 | 20248 | 11988 | 6173 | 11219 |
| 2012 | 5211577 | 889554 | 398540 | 171994 | 86570 | 31350 | 9195 | 5215 | 11046 |
| 2013 | 8612001 | 709431 | 229077 | 198394 | 84847 | 37222 | 13396 | 3986 | 9166 |
| 2014 | 10098168 | 1301012 | 213892 | 110012 | 99182 | 38975 | 15874 | 6242 | 8129 |
| 2015 | 9630816 | 1455957 | 420073 | 91105 | 55268 | 46147 | 16148 | 6948 | 8660 |
| 2016 | 11135672 | 1391362 | 433054 | 174618 | 43057 | 24035 | 18141 | 7350 | 8466 |
| 2017 | 7272095 | 1753333 | 430251 | 174126 | 71578 | 18522 | 8958 | 8057 | 8352 |
| 2018 | 10140289 | 1061516 | 523661 | 183128 | 75453 | 29042 | 6987 | 4152 | 7253 |
| 2019 | 18255992 | 1735167 | 326637 | 229197 | 84468 | 31296 | 10684 | 3345 | 4714 |
| 2020 | 17980297 | 3695785 | 490650 | 158812 | 107206 | 35020 | 12972 | 4753 | 3304 |
| 2021 | 10017662 | 3652397 | 1263099 | 221366 | 84193 | 48227 | 16625 | 6815 | 3142 |
| 2022 | 12421080 | 1755007 | 1262254 | 657008 | 115851 | 41719 | 24007 | 8974 | 5949 |
| 2023 | 9097307 | 2472325 | 594771 | 651128 | 374628 | 57936 | 21127 | 14131 | 8515 |
| 2024 | 14213940 | 1631868 | 729965 | 302287 | 403883 | 215014 | 30219 | 11809 | 14442 |
| 2025 | 14213940 | 2796420 | 506194 | 357399 | 168087 | 227551 | 122929 | 18673 | 17500 |