| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 29776768 | 8714544 | 1775546 | 813836 | 233791 | 20136 | 14342 | 4621 | 2369 |
| 1979 | 21051882 | 9636969 | 2250353 | 646383 | 279710 | 73439 | 6511 | 4798 | 3365 |
| 1980 | 11142737 | 6656891 | 2352948 | 785510 | 207964 | 91426 | 22399 | 2417 | 4577 |
| 1981 | 10083297 | 3256079 | 1926118 | 833217 | 239815 | 57597 | 22290 | 7206 | 3454 |
| 1982 | 8563701 | 3042047 | 826847 | 788795 | 272440 | 66357 | 14330 | 6353 | 5102 |
| 1983 | 12282605 | 2483824 | 754176 | 330628 | 309802 | 95728 | 19801 | 5062 | 6778 |
| 1984 | 11342851 | 3784946 | 585781 | 283147 | 106430 | 102341 | 28391 | 7162 | 6536 |
| 1985 | 18998277 | 3266648 | 967515 | 219553 | 84339 | 28977 | 28344 | 8391 | 6836 |
| 1986 | 17450062 | 6099406 | 857174 | 413011 | 81689 | 26708 | 7226 | 8768 | 6284 |
| 1987 | 15242554 | 5365647 | 1572894 | 308864 | 145768 | 21809 | 6816 | 2100 | 6204 |
| 1988 | 19815495 | 4569414 | 1661831 | 576869 | 98088 | 40127 | 4880 | 1816 | 3500 |
| 1989 | 12004177 | 6408099 | 1100344 | 640507 | 199973 | 30099 | 11881 | 1835 | 3699 |
| 1990 | 11279464 | 3530476 | 2009866 | 413741 | 233863 | 65566 | 8009 | 4486 | 3197 |
| 1991 | 13386723 | 3270332 | 917706 | 766306 | 131951 | 75276 | 23491 | 3562 | 4709 |
| 1992 | 15243636 | 3873938 | 965022 | 350709 | 327744 | 42941 | 26431 | 12986 | 4247 |
| 1993 | 15463683 | 4284476 | 987882 | 398733 | 148364 | 129447 | 15598 | 11361 | 11018 |
| 1994 | 14079480 | 4207066 | 1130553 | 373355 | 141905 | 54902 | 49305 | 6941 | 10657 |
| 1995 | 10673596 | 3646780 | 1146370 | 464838 | 137590 | 49415 | 18770 | 21777 | 9487 |
| 1996 | 8752206 | 2468636 | 965727 | 485735 | 192043 | 51917 | 19143 | 8311 | 18802 |
| 1997 | 13959937 | 1921532 | 620747 | 429189 | 194193 | 79879 | 21154 | 8825 | 14354 |
| 1998 | 24143686 | 3005539 | 491533 | 267567 | 184097 | 82861 | 36082 | 11172 | 13465 |
| 1999 | 24806833 | 4997591 | 787128 | 217508 | 133056 | 82627 | 39249 | 16988 | 13749 |
| 2000 | 18416981 | 4593596 | 1299041 | 326464 | 99041 | 59416 | 36940 | 20685 | 18277 |
| 2001 | 16050501 | 3203595 | 1299806 | 525144 | 139043 | 41521 | 27312 | 17093 | 23800 |
| 2002 | 9117233 | 2654563 | 897388 | 690048 | 254869 | 63667 | 17594 | 13912 | 19595 |
| 2003 | 8446145 | 1366273 | 705216 | 464158 | 368842 | 125273 | 31641 | 8669 | 18002 |
| 2004 | 8994696 | 1222921 | 302904 | 300622 | 240312 | 181746 | 73306 | 17934 | 14399 |
| 2005 | 9225343 | 1267397 | 317605 | 125751 | 153062 | 132065 | 94376 | 40256 | 20071 |
| 2006 | 7072317 | 1301516 | 345962 | 135215 | 62758 | 86467 | 74499 | 48264 | 33710 |
| 2007 | 10126309 | 907367 | 335366 | 164957 | 60235 | 31554 | 46514 | 38439 | 48441 |
| 2008 | 10503913 | 1342039 | 248162 | 155823 | 80013 | 28618 | 15099 | 24147 | 51496 |
| 2009 | 10319978 | 1421260 | 354001 | 102873 | 68574 | 41675 | 14599 | 7905 | 41314 |
| 2010 | 10107217 | 1355957 | 419424 | 149603 | 50366 | 35220 | 20241 | 6764 | 27272 |
| 2011 | 7133686 | 1351285 | 438180 | 191899 | 72786 | 24818 | 15123 | 8651 | 18667 |
| 2012 | 6209056 | 926937 | 439717 | 186786 | 97344 | 37806 | 11724 | 7032 | 17499 |
| 2013 | 10497337 | 764645 | 248500 | 223585 | 96978 | 45123 | 17424 | 5408 | 14660 |
| 2014 | 12493062 | 1411057 | 242959 | 126147 | 117100 | 47236 | 20270 | 8843 | 13508 |
| 2015 | 10880506 | 1619039 | 475329 | 103239 | 64175 | 56936 | 21316 | 9593 | 14172 |
| 2016 | 12467051 | 1436963 | 488068 | 199284 | 49472 | 28991 | 24779 | 10519 | 14003 |
| 2017 | 8022154 | 1801817 | 474723 | 194299 | 83138 | 22467 | 11785 | 12026 | 13819 |
| 2018 | 11967475 | 1132900 | 581355 | 207013 | 86685 | 35448 | 9543 | 5952 | 12189 |
| 2019 | 23003324 | 1873158 | 385032 | 266386 | 100031 | 39047 | 14921 | 5287 | 8619 |
| 2020 | 21266302 | 4013938 | 579859 | 197141 | 133486 | 45383 | 18036 | 7343 | 6359 |
| 2021 | 10072069 | 3929667 | 1431745 | 262206 | 103030 | 62268 | 23447 | 10630 | 6442 |
| 2022 | 12419518 | 1724524 | 1390329 | 754372 | 137897 | 53019 | 33050 | 14025 | 11314 |
| 2023 | 9262750 | 2518539 | 656496 | 732974 | 448402 | 70624 | 27712 | 21679 | 16240 |
| 2024 | 15440000 | 1707506 | 838406 | 351354 | 476429 | 260764 | 37193 | 16329 | 25049 |
| 2025 | 15440000 | 3061884 | 609658 | 416010 | 196232 | 265552 | 153274 | 24594 | 29859 |