| Table 3. Estimated stock numbers at age. | |||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
| 1978 | 30324765 | 8626876 | 1753710 | 820126 | 222992 | 16045 | 18878 |
| 1979 | 21608349 | 9753495 | 2214471 | 636456 | 279976 | 67580 | 10562 |
| 1980 | 11309853 | 6811985 | 2398255 | 771582 | 203577 | 89963 | 21782 |
| 1981 | 10857951 | 3325388 | 1930018 | 858527 | 234690 | 55841 | 27647 |
| 1982 | 8710862 | 3301620 | 843979 | 775875 | 285658 | 64332 | 21682 |
| 1983 | 13579119 | 2530818 | 847862 | 333425 | 297133 | 101668 | 26087 |
| 1984 | 10837279 | 4225557 | 649359 | 301036 | 107485 | 93098 | 40115 |
| 1985 | 17662728 | 3138574 | 1061152 | 235310 | 87140 | 28246 | 35282 |
| 1986 | 17304188 | 5575876 | 852996 | 432951 | 81783 | 24947 | 18002 |
| 1987 | 12508236 | 5396926 | 1483620 | 305771 | 148882 | 19918 | 10944 |
| 1988 | 18318973 | 3698035 | 1576609 | 542083 | 97134 | 39958 | 7453 |
| 1989 | 10396740 | 5900527 | 954448 | 589057 | 181262 | 29226 | 14212 |
| 1990 | 11279371 | 3035537 | 1747368 | 374146 | 212584 | 55458 | 13772 |
| 1991 | 13300703 | 3312403 | 779234 | 643049 | 123004 | 68179 | 21846 |
| 1992 | 15368720 | 3860823 | 886094 | 304245 | 271653 | 39130 | 33191 |
| 1993 | 15540775 | 4325867 | 914736 | 358343 | 126256 | 103133 | 27592 |
| 1994 | 14213905 | 4225804 | 1055065 | 341121 | 125806 | 46035 | 43532 |
| 1995 | 10085704 | 3693013 | 1072212 | 427473 | 119523 | 41966 | 32326 |
| 1996 | 8390304 | 2333557 | 886705 | 448194 | 170033 | 43012 | 29818 |
| 1997 | 13406415 | 1864744 | 557555 | 389725 | 169417 | 67797 | 30482 |
| 1998 | 21698260 | 2897536 | 465256 | 235031 | 158983 | 66529 | 44458 |
| 1999 | 22906093 | 4412827 | 722258 | 196550 | 115215 | 67261 | 48749 |
| 2000 | 17109475 | 4230873 | 1120166 | 285437 | 84545 | 46870 | 51407 |
| 2001 | 14854107 | 2976354 | 1148646 | 456277 | 115713 | 33461 | 43449 |
| 2002 | 7402377 | 2459067 | 834894 | 593862 | 216217 | 50046 | 34918 |
| 2003 | 7234061 | 1100140 | 656105 | 414855 | 312437 | 100152 | 42118 |
| 2004 | 7451699 | 1054100 | 266428 | 269678 | 212124 | 147319 | 76983 |
| 2005 | 8152789 | 1039979 | 287862 | 113893 | 136944 | 109244 | 116773 |
| 2006 | 6011336 | 1149374 | 311100 | 123148 | 56364 | 74493 | 118123 |
| 2007 | 9161750 | 772420 | 308696 | 148297 | 53450 | 27750 | 98895 |
| 2008 | 10013324 | 1207822 | 227848 | 140395 | 71563 | 23949 | 64734 |
| 2009 | 9941835 | 1356076 | 341166 | 98743 | 63103 | 35818 | 44399 |
| 2010 | 9137981 | 1311317 | 404293 | 143295 | 47574 | 32305 | 37974 |
| 2011 | 6528107 | 1207659 | 418871 | 178042 | 67093 | 22894 | 31776 |
| 2012 | 5066493 | 861236 | 401779 | 172862 | 84358 | 33159 | 26115 |
| 2013 | 8737094 | 622553 | 235137 | 201879 | 86451 | 38143 | 27670 |
| 2014 | 10963379 | 1165734 | 197387 | 110025 | 101353 | 40866 | 29576 |
| 2015 | 9153619 | 1429552 | 390544 | 86327 | 52852 | 48428 | 30837 |
| 2016 | 12042031 | 1207509 | 396070 | 165774 | 39799 | 23708 | 33285 |
| 2017 | 7376093 | 1754445 | 382325 | 158157 | 67078 | 17422 | 23138 |
| 2018 | 10186814 | 1056469 | 529194 | 175494 | 70200 | 27068 | 17072 |
| 2019 | 20216857 | 1586624 | 355895 | 232893 | 83025 | 29096 | 18777 |
| 2020 | 18900319 | 3502908 | 498212 | 176612 | 108054 | 35646 | 21133 |
| 2021 | 8714606 | 3454651 | 1255575 | 225586 | 87865 | 47402 | 27696 |
| 2022 | 10766806 | 1515289 | 1191571 | 648057 | 117621 | 44830 | 37771 |
| 2023 | 6628643 | 2182538 | 566865 | 631207 | 376632 | 59776 | 45451 |
| 2024 | 14652316 | 1201952 | 738425 | 304347 | 390306 | 210379 | 58705 |
| 2025 | 14652316 | 2948158 | 439705 | 358688 | 168057 | 211258 | 154872 |