| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1991 | 9271907 | 5043635 | 2659791 | 2181206 | 1010079 | 580303 | 178144 | 51113 | 15490 |
| 1992 | 6465332 | 4092614 | 2555325 | 1527666 | 1222399 | 541192 | 306275 | 91846 | 33463 |
| 1993 | 5959097 | 2786416 | 2086830 | 1396277 | 809559 | 594619 | 249179 | 131236 | 50373 |
| 1994 | 8786470 | 2486729 | 1327156 | 1124197 | 696138 | 369941 | 251780 | 96203 | 65477 |
| 1995 | 8379218 | 3781009 | 1168957 | 687733 | 561742 | 304040 | 151967 | 92688 | 55942 |
| 1996 | 8148457 | 3464074 | 1631084 | 563544 | 320055 | 241826 | 125607 | 58720 | 55124 |
| 1997 | 7613840 | 3468919 | 1522977 | 810437 | 263934 | 133194 | 95170 | 45357 | 39557 |
| 1998 | 10479608 | 3133780 | 1571938 | 780453 | 402493 | 119802 | 57601 | 37202 | 31098 |
| 1999 | 11111846 | 4385267 | 1366259 | 792983 | 390108 | 184227 | 52648 | 23452 | 25513 |
| 2000 | 6840386 | 4725936 | 2041672 | 721075 | 422830 | 196890 | 90259 | 24403 | 21359 |
| 2001 | 7021250 | 2852253 | 2133573 | 1051115 | 360329 | 193801 | 86449 | 36252 | 16730 |
| 2002 | 5737289 | 2909703 | 1240284 | 1069925 | 522765 | 156876 | 80495 | 32358 | 18274 |
| 2003 | 5997907 | 2426900 | 1353199 | 641420 | 556982 | 245565 | 69980 | 33134 | 19359 |
| 2004 | 4262894 | 2662879 | 1280017 | 785080 | 367078 | 290474 | 122001 | 31979 | 22202 |
| 2005 | 4149017 | 1852453 | 1442556 | 759166 | 447854 | 191512 | 144570 | 55877 | 22813 |
| 2006 | 2815665 | 1804502 | 959324 | 811472 | 414430 | 213353 | 85446 | 57932 | 28669 |
| 2007 | 2480084 | 1227266 | 958002 | 537580 | 445267 | 206197 | 97417 | 35851 | 33177 |
| 2008 | 2521569 | 1127924 | 654406 | 540196 | 299870 | 229865 | 103289 | 44531 | 29824 |
| 2009 | 2475352 | 1115596 | 605582 | 341048 | 272227 | 140144 | 104011 | 44245 | 30551 |
| 2010 | 3474767 | 1067628 | 574572 | 323988 | 175961 | 125659 | 63985 | 44176 | 31315 |
| 2011 | 2761295 | 1557256 | 570396 | 329694 | 192934 | 96656 | 67723 | 33387 | 38832 |
| 2012 | 2344188 | 1211418 | 876267 | 343899 | 198482 | 110763 | 54137 | 36022 | 38700 |
| 2013 | 2937781 | 1047085 | 673776 | 536448 | 205175 | 108191 | 59605 | 27546 | 37618 |
| 2014 | 2770176 | 1369400 | 587513 | 399543 | 318565 | 109554 | 56562 | 29501 | 32167 |
| 2015 | 2005076 | 1207914 | 809768 | 351880 | 238983 | 174795 | 60264 | 29648 | 32739 |
| 2016 | 1962543 | 861334 | 650710 | 481687 | 209636 | 131861 | 93490 | 30604 | 31786 |
| 2017 | 1590588 | 846562 | 443546 | 329585 | 274936 | 107682 | 64876 | 41221 | 27711 |
| 2018 | 1134200 | 712625 | 448040 | 224602 | 179967 | 144694 | 52621 | 28132 | 30012 |
| 2019 | 1196441 | 513713 | 390439 | 229013 | 125515 | 94394 | 73536 | 24176 | 27671 |
| 2020 | 758771 | 528352 | 288912 | 205889 | 132581 | 70683 | 51785 | 37891 | 28084 |
| 2021 | 616313 | 339495 | 295445 | 168979 | 125440 | 77337 | 40831 | 27997 | 37720 |
| 2022 | 1236994 | 258623 | 199901 | 176484 | 109818 | 79154 | 49505 | 25675 | 42886 |
| 2023 | 750898 | 555301 | 151342 | 138864 | 123292 | 76771 | 55232 | 34858 | 49047 |
| 2024 | 994198 | 330947 | 330282 | 104679 | 101510 | 89619 | 57197 | 41095 | 63675 |