| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 31447425 | 8370031 | 1813737 | 804676 | 230077 | 19763 | 13717 | 4107 | 1784 |
| 1979 | 23343615 | 9342033 | 2257887 | 637832 | 276358 | 73628 | 6291 | 4308 | 2540 |
| 1980 | 12860137 | 7058040 | 2522955 | 776064 | 204075 | 88628 | 21712 | 2155 | 3473 |
| 1981 | 12157688 | 3459272 | 2106842 | 909443 | 243509 | 57487 | 21452 | 6318 | 2536 |
| 1982 | 9511036 | 3192770 | 858036 | 817818 | 284782 | 66888 | 13603 | 5600 | 3719 |
| 1983 | 12962786 | 2466040 | 790186 | 328863 | 301732 | 96424 | 18900 | 4451 | 4968 |
| 1984 | 11097513 | 3719828 | 616424 | 283614 | 106978 | 98212 | 27888 | 6287 | 4809 |
| 1985 | 17714092 | 2963934 | 1006191 | 222521 | 84224 | 28918 | 26251 | 7578 | 5066 |
| 1986 | 16469621 | 5441208 | 835403 | 412566 | 80654 | 25984 | 7003 | 7433 | 4725 |
| 1987 | 13502473 | 4889492 | 1562129 | 308949 | 140921 | 20867 | 6250 | 1823 | 4611 |
| 1988 | 18360837 | 3854664 | 1541158 | 569091 | 96469 | 37798 | 4348 | 1466 | 2485 |
| 1989 | 11090377 | 5752778 | 983589 | 592920 | 182697 | 27916 | 10146 | 1452 | 2550 |
| 1990 | 10878080 | 3077358 | 1789536 | 378708 | 213813 | 55817 | 6820 | 3369 | 2151 |
| 1991 | 12745392 | 2968453 | 816406 | 697728 | 117263 | 66174 | 18258 | 2752 | 3184 |
| 1992 | 14786640 | 3518845 | 874230 | 319356 | 287916 | 37602 | 21669 | 8897 | 2898 |
| 1993 | 14787000 | 4021909 | 905986 | 361751 | 130409 | 111895 | 12792 | 8508 | 7122 |
| 1994 | 13488530 | 3925232 | 1047745 | 341507 | 127821 | 47591 | 39412 | 5120 | 7101 |
| 1995 | 10237041 | 3432262 | 1052114 | 416102 | 123198 | 42257 | 15011 | 15394 | 6341 |
| 1996 | 8066272 | 2333227 | 891289 | 433298 | 166014 | 45322 | 15042 | 6003 | 12680 |
| 1997 | 11874954 | 1770624 | 581961 | 381193 | 167740 | 65819 | 16756 | 6398 | 9615 |
| 1998 | 18516369 | 2593950 | 452639 | 248254 | 161421 | 67927 | 27823 | 8190 | 9098 |
| 1999 | 19050481 | 3952695 | 674936 | 191679 | 118140 | 70007 | 30307 | 12604 | 9270 |
| 2000 | 15020697 | 3700653 | 1049640 | 273869 | 83193 | 47747 | 28547 | 14645 | 12369 |
| 2001 | 14017744 | 2789165 | 1125531 | 443476 | 117331 | 33338 | 20266 | 12161 | 15944 |
| 2002 | 8352718 | 2492874 | 828379 | 615366 | 217926 | 54117 | 14004 | 9857 | 13495 |
| 2003 | 7753595 | 1294974 | 662552 | 424930 | 318470 | 106742 | 25996 | 6858 | 12228 |
| 2004 | 8020369 | 1166765 | 289084 | 285875 | 220451 | 154535 | 58711 | 14336 | 10115 |
| 2005 | 7897555 | 1211952 | 308533 | 118816 | 141619 | 114282 | 76005 | 31510 | 14708 |
| 2006 | 5983011 | 1210797 | 352844 | 131548 | 58924 | 76467 | 60983 | 38779 | 25230 |
| 2007 | 8135969 | 843304 | 330578 | 160436 | 57243 | 27780 | 38075 | 30453 | 36637 |
| 2008 | 8110608 | 1253176 | 234038 | 150157 | 74806 | 26315 | 12948 | 19089 | 40607 |
| 2009 | 7686369 | 1333945 | 343567 | 98900 | 65801 | 37311 | 12721 | 6477 | 32241 |
| 2010 | 7890611 | 1277865 | 404824 | 140684 | 46748 | 31408 | 17022 | 5592 | 20432 |
| 2011 | 6024795 | 1304067 | 414310 | 184907 | 68569 | 21959 | 13385 | 6883 | 13389 |
| 2012 | 5297314 | 890739 | 423126 | 181389 | 91100 | 33843 | 10195 | 5922 | 12449 |
| 2013 | 8582278 | 703110 | 241002 | 207941 | 90976 | 39987 | 14991 | 4508 | 10422 |
| 2014 | 10254036 | 1255143 | 213390 | 114521 | 104799 | 42303 | 17653 | 7212 | 9207 |
| 2015 | 9685007 | 1451262 | 407783 | 92107 | 56636 | 48511 | 17532 | 7901 | 9384 |
| 2016 | 11748988 | 1364984 | 419184 | 171513 | 43301 | 24498 | 19415 | 8079 | 9311 |
| 2017 | 7701300 | 1836321 | 416951 | 172610 | 70834 | 19010 | 9176 | 8913 | 9251 |
| 2018 | 10417448 | 1136491 | 539078 | 188651 | 77322 | 29926 | 7563 | 4401 | 8355 |
| 2019 | 19397306 | 1760314 | 351497 | 241446 | 89551 | 33375 | 11872 | 3938 | 5920 |
| 2020 | 18968813 | 3844885 | 509485 | 170778 | 114893 | 38236 | 14199 | 5461 | 4233 |
| 2021 | 9979691 | 3812378 | 1314322 | 233679 | 90724 | 52809 | 18973 | 7826 | 4331 |
| 2022 | 12321898 | 1734374 | 1291038 | 686083 | 122885 | 46081 | 27124 | 10665 | 7547 |
| 2023 | 9033235 | 2439704 | 597741 | 672200 | 390642 | 62716 | 24011 | 16682 | 11008 |
| 2024 | 15212663 | 1605740 | 745809 | 307994 | 417585 | 225427 | 32946 | 13647 | 16727 |
| 2025 | 15212663 | 3008101 | 500295 | 363892 | 170467 | 233778 | 129483 | 20786 | 20652 |