| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1991 | 78962570 | 16089240 | 6150007 | 4029765 | 1687465 | 949837 | 275816 | 79511 | 27669 |
| 1992 | 48904162 | 14522642 | 5278603 | 2766919 | 1849593 | 779706 | 447320 | 134545 | 53172 |
| 1993 | 41920814 | 8983661 | 4711351 | 2330933 | 1236998 | 804857 | 324226 | 173396 | 66698 |
| 1994 | 65275031 | 7687117 | 2879337 | 2057222 | 1011320 | 521400 | 326164 | 122150 | 84510 |
| 1995 | 57230097 | 11963032 | 2430444 | 1223038 | 854119 | 393259 | 196149 | 112227 | 68295 |
| 1996 | 64471619 | 10412486 | 3623671 | 1014286 | 514250 | 352410 | 163731 | 78685 | 72913 |
| 1997 | 58638291 | 11811356 | 3281865 | 1547859 | 416144 | 194911 | 125698 | 54752 | 51840 |
| 1998 | 92047526 | 10742296 | 3773938 | 1457830 | 685550 | 178938 | 80653 | 46615 | 35786 |
| 1999 | 93800739 | 16861908 | 3414538 | 1661444 | 653680 | 296787 | 75034 | 31830 | 28858 |
| 2000 | 53833352 | 17233564 | 5493500 | 1529612 | 766865 | 304497 | 138427 | 34510 | 26478 |
| 2001 | 53678862 | 9913379 | 5660677 | 2406422 | 677051 | 331720 | 128725 | 54335 | 20691 |
| 2002 | 58258827 | 9888851 | 3289189 | 2566301 | 1095814 | 290389 | 137618 | 49211 | 26610 |
| 2003 | 58445544 | 10720417 | 3273850 | 1499833 | 1177612 | 480772 | 125213 | 57752 | 31386 |
| 2004 | 39170260 | 10770705 | 3604606 | 1528020 | 715730 | 540645 | 215428 | 54616 | 38058 |
| 2005 | 37772738 | 7220099 | 3648054 | 1716053 | 745698 | 336434 | 247878 | 93227 | 38098 |
| 2006 | 28169456 | 6966689 | 2436937 | 1688517 | 804715 | 334437 | 147729 | 99918 | 48350 |
| 2007 | 31964540 | 5197365 | 2354946 | 1113280 | 774934 | 357642 | 147405 | 61822 | 58058 |
| 2008 | 25570658 | 5900742 | 1754913 | 1067307 | 506228 | 346943 | 160273 | 64312 | 50989 |
| 2009 | 24792290 | 4719177 | 1997666 | 800977 | 486470 | 224146 | 146819 | 65694 | 48053 |
| 2010 | 32259654 | 4573879 | 1592101 | 907772 | 376670 | 226554 | 100411 | 61934 | 48308 |
| 2011 | 27083803 | 5953897 | 1554402 | 742644 | 448204 | 187060 | 112471 | 48984 | 54745 |
| 2012 | 24312578 | 4998719 | 2043514 | 754511 | 379932 | 227186 | 93598 | 54533 | 50924 |
| 2013 | 40573439 | 4486909 | 1710749 | 974855 | 373482 | 182584 | 109343 | 44661 | 50822 |
| 2014 | 20404211 | 7488703 | 1528384 | 818550 | 483015 | 174768 | 84123 | 48943 | 42931 |
| 2015 | 17606866 | 3764031 | 2558909 | 732200 | 407086 | 233915 | 85009 | 40768 | 44109 |
| 2016 | 15085661 | 3248506 | 1281829 | 1217174 | 360355 | 193395 | 108991 | 38560 | 36886 |
| 2017 | 16209585 | 2781853 | 1092134 | 574339 | 570020 | 163121 | 83277 | 43433 | 27417 |
| 2018 | 14155173 | 2992440 | 944547 | 483890 | 264988 | 253588 | 64465 | 28206 | 20481 |
| 2019 | 15240214 | 2613417 | 1018312 | 410339 | 225262 | 122735 | 107815 | 24662 | 16683 |
| 2020 | 12682496 | 2814164 | 900617 | 482887 | 204373 | 113016 | 59592 | 48811 | 16478 |
| 2021 | 6567191 | 2342081 | 964659 | 416188 | 240291 | 103604 | 56253 | 28147 | 27835 |
| 2022 | 15964287 | 1212016 | 812367 | 465033 | 214772 | 127899 | 55726 | 29973 | 29089 |
| 2023 | 12473842 | 2950010 | 423357 | 415051 | 250875 | 118462 | 72316 | 31598 | 32491 |
| 2024 | 16798030 | 2303769 | 1031611 | 216537 | 226471 | 141807 | 69285 | 43212 | 38636 |
| 2025 | 15433119 | 3102744 | 805256 | 527657 | 117848 | 127453 | 82645 | 41207 | 49003 |