| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 30483746 | 7913872 | 1746779 | 779427 | 230306 | 19410 | 13361 | 3520 | 1223 |
| 1979 | 22032623 | 9018697 | 2162091 | 605179 | 264899 | 70872 | 5930 | 3903 | 1785 |
| 1980 | 11725991 | 6652211 | 2512619 | 767334 | 193535 | 83048 | 19443 | 1816 | 2397 |
| 1981 | 10752271 | 3058340 | 2036278 | 901516 | 249471 | 56894 | 20556 | 5617 | 1599 |
| 1982 | 8272794 | 2757745 | 748506 | 792610 | 278826 | 69833 | 13817 | 5293 | 2731 |
| 1983 | 11202369 | 2096093 | 642856 | 282157 | 276507 | 87705 | 18371 | 3990 | 3757 |
| 1984 | 10585660 | 3184058 | 514691 | 235780 | 89882 | 87440 | 23327 | 5479 | 3290 |
| 1985 | 17900197 | 2810965 | 870167 | 194288 | 72937 | 24824 | 23497 | 5952 | 3454 |
| 1986 | 16658530 | 5519634 | 754323 | 349244 | 67447 | 22045 | 5897 | 6566 | 3042 |
| 1987 | 15117647 | 4923811 | 1577073 | 278535 | 121524 | 17376 | 5381 | 1460 | 3214 |
| 1988 | 19130684 | 4318465 | 1573791 | 575326 | 93214 | 36071 | 4123 | 1446 | 1730 |
| 1989 | 11617369 | 6047273 | 1093931 | 629293 | 190157 | 27293 | 10076 | 1347 | 1982 |
| 1990 | 10513295 | 3202679 | 1882633 | 411104 | 226537 | 60226 | 6953 | 3503 | 1739 |
| 1991 | 12655150 | 2839855 | 882137 | 769782 | 132817 | 72689 | 19671 | 2605 | 2774 |
| 1992 | 14625216 | 3471624 | 901484 | 339164 | 314432 | 40837 | 22136 | 9039 | 2147 |
| 1993 | 14819508 | 3973334 | 932511 | 372961 | 132933 | 113092 | 12709 | 7880 | 6900 |
| 1994 | 13052938 | 3944346 | 1110377 | 353924 | 129992 | 46076 | 37688 | 4683 | 5974 |
| 1995 | 10133217 | 3288959 | 1112259 | 438878 | 126798 | 42842 | 14371 | 14665 | 5103 |
| 1996 | 7969765 | 2287517 | 916023 | 450271 | 172111 | 45316 | 15094 | 5650 | 11509 |
| 1997 | 11580159 | 1727835 | 589993 | 387535 | 169814 | 66330 | 16320 | 6312 | 8386 |
| 1998 | 18632220 | 2510173 | 447206 | 250054 | 160797 | 66564 | 26090 | 7554 | 7732 |
| 1999 | 19236171 | 4014742 | 666230 | 185013 | 113232 | 65890 | 28018 | 11043 | 8105 |
| 2000 | 14677617 | 3777334 | 1105111 | 276447 | 80715 | 45114 | 25761 | 12995 | 10207 |
| 2001 | 13206110 | 2684947 | 1153832 | 460885 | 119400 | 32970 | 19606 | 11304 | 14506 |
| 2002 | 8243537 | 2302972 | 791716 | 607984 | 215415 | 53040 | 13622 | 9486 | 11689 |
| 2003 | 7601822 | 1268242 | 597206 | 398364 | 305380 | 102351 | 24504 | 6540 | 11159 |
| 2004 | 7777567 | 1168970 | 272650 | 269980 | 205828 | 142443 | 52839 | 12845 | 8569 |
| 2005 | 7650741 | 1190799 | 291326 | 109907 | 131107 | 103410 | 66965 | 27661 | 12806 |
| 2006 | 5941172 | 1192294 | 326376 | 120675 | 52810 | 69213 | 52704 | 32671 | 21696 |
| 2007 | 7896884 | 857414 | 307867 | 149481 | 52437 | 24783 | 34871 | 25723 | 30076 |
| 2008 | 7655734 | 1243486 | 218240 | 137753 | 67868 | 23279 | 11110 | 17398 | 33296 |
| 2009 | 7256097 | 1285185 | 322881 | 89924 | 58167 | 32479 | 10500 | 5193 | 25896 |
| 2010 | 7428059 | 1230373 | 382781 | 130879 | 42192 | 27444 | 14533 | 4452 | 16900 |
| 2011 | 5911760 | 1243614 | 390402 | 174575 | 64494 | 20330 | 12094 | 6164 | 11505 |
| 2012 | 5215224 | 892869 | 398277 | 171832 | 86584 | 31377 | 9260 | 5245 | 11208 |
| 2013 | 8584643 | 710912 | 229397 | 198767 | 85112 | 37364 | 13526 | 4060 | 9307 |
| 2014 | 10083562 | 1300198 | 214040 | 110163 | 99466 | 39157 | 16051 | 6340 | 8348 |
| 2015 | 9602388 | 1458341 | 419975 | 91074 | 55317 | 46227 | 16283 | 7039 | 8864 |
| 2016 | 11094526 | 1390428 | 433327 | 174570 | 43062 | 24042 | 18307 | 7433 | 8640 |
| 2017 | 7288797 | 1752387 | 430486 | 174284 | 71671 | 18564 | 9039 | 8149 | 8594 |
| 2018 | 10199318 | 1066993 | 525249 | 183608 | 75689 | 29217 | 7035 | 4186 | 7393 |
| 2019 | 18322373 | 1751034 | 329352 | 230815 | 85195 | 31699 | 10966 | 3381 | 4857 |
| 2020 | 17952541 | 3719806 | 496040 | 160772 | 108711 | 35744 | 13382 | 4953 | 3376 |
| 2021 | 9932776 | 3656713 | 1272522 | 223992 | 85648 | 49353 | 17258 | 7186 | 3278 |
| 2022 | 12309183 | 1738427 | 1262701 | 661040 | 117260 | 42807 | 24751 | 9515 | 6418 |
| 2023 | 9039232 | 2452991 | 591535 | 650957 | 376510 | 58471 | 21793 | 14774 | 9126 |
| 2024 | 14075295 | 1621173 | 725549 | 301379 | 404295 | 216152 | 29960 | 12450 | 15358 |
| 2025 | 14075295 | 2772144 | 503261 | 355503 | 167449 | 227486 | 123523 | 18494 | 18866 |