| Table 3. Estimated stock numbers at age. | |||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 
| 1978 | 28176453 | 8511260 | 1725297 | 830392 | 223374 | 15816 | 18634 | 
| 1979 | 20654820 | 8991510 | 2171704 | 620681 | 282824 | 67515 | 10139 | 
| 1980 | 11039805 | 6589421 | 2234567 | 757243 | 198822 | 90469 | 21584 | 
| 1981 | 10730418 | 3137232 | 1850551 | 791275 | 231354 | 55087 | 27720 | 
| 1982 | 6970703 | 2996691 | 779235 | 733850 | 253625 | 63848 | 20677 | 
| 1983 | 13601396 | 2112133 | 731457 | 290197 | 268765 | 80650 | 24069 | 
| 1984 | 9571120 | 3889095 | 568869 | 257080 | 91638 | 86847 | 30655 | 
| 1985 | 15452360 | 2790789 | 994859 | 206922 | 77388 | 24587 | 31255 | 
| 1986 | 15775295 | 5038877 | 736642 | 407067 | 72762 | 21941 | 13840 | 
| 1987 | 11827421 | 4890344 | 1393306 | 271780 | 136835 | 17672 | 8573 | 
| 1988 | 20159943 | 3745092 | 1426582 | 526987 | 86802 | 34153 | 5093 | 
| 1989 | 10374845 | 6268232 | 980408 | 563235 | 185223 | 24813 | 8454 | 
| 1990 | 10778981 | 3248296 | 1762541 | 377905 | 202997 | 54778 | 6294 | 
| 1991 | 13559816 | 3110526 | 885316 | 631315 | 133669 | 64813 | 14814 | 
| 1992 | 12651169 | 3576408 | 848399 | 334348 | 242840 | 49830 | 24446 | 
| 1993 | 14216232 | 3570530 | 890704 | 328276 | 127335 | 91233 | 24787 | 
| 1994 | 10800279 | 3617572 | 940858 | 327052 | 116012 | 41998 | 40742 | 
| 1995 | 11551564 | 2845514 | 933535 | 382528 | 115669 | 36317 | 25399 | 
| 1996 | 7746939 | 2239377 | 774004 | 382402 | 148893 | 40964 | 19483 | 
| 1997 | 11619571 | 1707240 | 567796 | 331244 | 147588 | 56086 | 19891 | 
| 1998 | 22388210 | 2398757 | 437539 | 238940 | 135173 | 55792 | 29005 | 
| 1999 | 24875808 | 4239121 | 601058 | 196198 | 107824 | 54481 | 33168 | 
| 2000 | 18810346 | 4435979 | 986165 | 247236 | 82795 | 41860 | 34216 | 
| 2001 | 18566825 | 3180673 | 1104758 | 391665 | 96854 | 33196 | 26760 | 
| 2002 | 8533740 | 2841354 | 813720 | 508447 | 173760 | 37283 | 22482 | 
| 2003 | 7340642 | 1181773 | 715593 | 381791 | 241856 | 79987 | 25400 | 
| 2004 | 8038387 | 1036082 | 259315 | 286506 | 183968 | 112651 | 52078 | 
| 2005 | 7127748 | 1100855 | 263338 | 110518 | 136278 | 89687 | 80165 | 
| 2006 | 6436911 | 1070584 | 299735 | 115488 | 54786 | 67243 | 87951 | 
| 2007 | 11030883 | 867557 | 294082 | 134847 | 54430 | 25885 | 79329 | 
| 2008 | 12964207 | 1578686 | 261712 | 135806 | 65320 | 25527 | 54063 | 
| 2009 | 13579702 | 1707010 | 463304 | 120981 | 69193 | 32585 | 43288 | 
| 2010 | 11121242 | 1681073 | 476398 | 204920 | 59427 | 37273 | 38878 | 
| 2011 | 8087888 | 1548664 | 498205 | 215726 | 95830 | 27249 | 34672 | 
| 2012 | 6062374 | 1106943 | 522699 | 214370 | 101484 | 44804 | 29453 | 
| 2013 | 9605854 | 735882 | 313502 | 248832 | 106341 | 48717 | 33572 | 
| 2014 | 13417939 | 1348543 | 241266 | 148110 | 124513 | 50818 | 38069 | 
| 2015 | 12677903 | 1740694 | 457907 | 114312 | 70892 | 58720 | 40017 | 
| 2016 | 14017267 | 1623109 | 514568 | 204799 | 54728 | 33171 | 43918 | 
| 2017 | 8742658 | 2030412 | 486572 | 214935 | 93414 | 24852 | 34896 | 
| 2018 | 9730328 | 1217195 | 622151 | 214816 | 97020 | 41646 | 27387 | 
| 2019 | 19302058 | 1614851 | 399749 | 271451 | 103045 | 42321 | 33477 | 
| 2020 | 20206167 | 3557170 | 530080 | 187762 | 123867 | 49038 | 35704 | 
| 2021 | 14035679 | 3719046 | 1293790 | 243458 | 90380 | 55361 | 42958 | 
| 2022 | 15264337 | 2445202 | 1315069 | 654520 | 128507 | 45535 | 51246 | 
| 2023 | 9778952 | 3059248 | 864655 | 676195 | 380495 | 67074 | 53422 | 
| 2024 | 22498083 | 1755055 | 1068133 | 440126 | 394970 | 210716 | 64000 | 
| 2025 | 22498083 | 4510842 | 657709 | 540061 | 256468 | 208047 | 160771 |