| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1991 | 79443506 | 16082191 | 6153335 | 4026369 | 1682328 | 945463 | 276089 | 78458 | 26533 |
| 1992 | 48830020 | 14611136 | 5278839 | 2764969 | 1854446 | 781747 | 448567 | 133733 | 51229 |
| 1993 | 41764284 | 8970401 | 4742191 | 2334853 | 1232802 | 801358 | 324365 | 174456 | 67119 |
| 1994 | 64205089 | 7658068 | 2876169 | 2072394 | 1016236 | 517540 | 323121 | 121942 | 85342 |
| 1995 | 57201097 | 11766717 | 2423331 | 1221061 | 863252 | 398746 | 194795 | 112039 | 68427 |
| 1996 | 64659496 | 10424911 | 3611122 | 1011376 | 513391 | 356288 | 164884 | 78128 | 71869 |
| 1997 | 58256767 | 11844743 | 3289185 | 1532154 | 416381 | 197531 | 130541 | 56409 | 50143 |
| 1998 | 91011580 | 10670242 | 3790923 | 1458573 | 678473 | 177423 | 80876 | 48903 | 36726 |
| 1999 | 93424181 | 16674015 | 3410912 | 1673525 | 651796 | 293108 | 74401 | 31836 | 30841 |
| 2000 | 52865125 | 17166618 | 5458811 | 1534634 | 772929 | 301899 | 136136 | 33866 | 27423 |
| 2001 | 54269211 | 9736341 | 5665856 | 2400687 | 675887 | 329989 | 126052 | 53002 | 21616 |
| 2002 | 57104666 | 9999321 | 3242173 | 2572569 | 1089535 | 289883 | 136418 | 48237 | 26546 |
| 2003 | 58474424 | 10509743 | 3316180 | 1476310 | 1183347 | 481194 | 125591 | 56915 | 30325 |
| 2004 | 38869862 | 10776113 | 3530766 | 1543167 | 703803 | 546457 | 217764 | 54827 | 36886 |
| 2005 | 38013696 | 7164591 | 3648792 | 1678025 | 751807 | 331405 | 250582 | 94423 | 37793 |
| 2006 | 28275765 | 7011210 | 2417188 | 1686767 | 785792 | 337372 | 144572 | 101279 | 49621 |
| 2007 | 31738855 | 5216854 | 2368713 | 1103565 | 776171 | 349865 | 147844 | 60139 | 59202 |
| 2008 | 25825440 | 5858977 | 1761388 | 1075902 | 505939 | 347090 | 155479 | 63538 | 50429 |
| 2009 | 24636299 | 4766112 | 1982534 | 804635 | 493203 | 223402 | 148112 | 63839 | 47095 |
| 2010 | 33528555 | 4544964 | 1608963 | 903770 | 378705 | 227682 | 100299 | 63255 | 46900 |
| 2011 | 26874081 | 6188525 | 1545376 | 751293 | 446145 | 187676 | 112970 | 49014 | 54386 |
| 2012 | 24244503 | 4959914 | 2123752 | 748988 | 383090 | 226058 | 94228 | 55477 | 51280 |
| 2013 | 40499644 | 4474275 | 1698038 | 1014527 | 371951 | 185763 | 108938 | 44810 | 51044 |
| 2014 | 21188893 | 7475673 | 1525082 | 811793 | 501361 | 175994 | 86211 | 49364 | 43601 |
| 2015 | 17591955 | 3908951 | 2556257 | 731428 | 404313 | 244207 | 85683 | 41652 | 44535 |
| 2016 | 15626558 | 3245764 | 1332423 | 1217517 | 359604 | 192824 | 113918 | 38785 | 37813 |
| 2017 | 16469918 | 2881918 | 1093202 | 598828 | 571791 | 163160 | 83068 | 45233 | 28423 |
| 2018 | 13953981 | 3040531 | 978622 | 484197 | 276244 | 253369 | 65450 | 28883 | 22736 |
| 2019 | 14358757 | 2576297 | 1035125 | 425868 | 226689 | 127672 | 109371 | 25492 | 18374 |
| 2020 | 12171933 | 2651361 | 888412 | 492614 | 213377 | 113934 | 62322 | 49656 | 18082 |
| 2021 | 6501933 | 2247851 | 908731 | 408686 | 245921 | 108282 | 57287 | 29641 | 30056 |
| 2022 | 13990406 | 1199988 | 779069 | 435035 | 211393 | 130805 | 58365 | 30471 | 31526 |
| 2023 | 13130864 | 2584990 | 419148 | 397947 | 234485 | 116780 | 74031 | 32894 | 34532 |
| 2024 | 17423315 | 2425305 | 903776 | 214339 | 217132 | 132523 | 68242 | 44071 | 40768 |