| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1991 | 77533728 | 17821846 | 6502903 | 4404359 | 1818046 | 976951 | 284189 | 80451 | 25924 |
| 1992 | 52559859 | 14336025 | 5869300 | 2969730 | 2065091 | 853325 | 463452 | 136398 | 51240 |
| 1993 | 46748301 | 9650712 | 4730433 | 2634499 | 1346214 | 908574 | 363735 | 187671 | 72214 |
| 1994 | 66010462 | 8523717 | 3105300 | 2093335 | 1154653 | 568693 | 369076 | 138963 | 95513 |
| 1995 | 62903393 | 12136825 | 2739699 | 1356189 | 906088 | 468456 | 221902 | 134196 | 83946 |
| 1996 | 63712209 | 11440353 | 3690535 | 1129083 | 568243 | 371435 | 191727 | 88314 | 88745 |
| 1997 | 59314428 | 11692663 | 3621129 | 1596647 | 472985 | 221443 | 139296 | 68212 | 64380 |
| 1998 | 81340529 | 10788195 | 3714566 | 1597911 | 705257 | 200467 | 91531 | 54108 | 50531 |
| 1999 | 87951871 | 14864698 | 3381317 | 1624143 | 712734 | 303485 | 84549 | 37136 | 41423 |
| 2000 | 57207782 | 16143702 | 4764222 | 1499425 | 747523 | 326509 | 138893 | 38099 | 35254 |
| 2001 | 59600257 | 10440935 | 5164867 | 2068599 | 663713 | 319914 | 136420 | 54173 | 27226 |
| 2002 | 57302841 | 10866929 | 3306440 | 2266019 | 915560 | 271658 | 126672 | 50384 | 29541 |
| 2003 | 55764531 | 10547343 | 3591380 | 1521166 | 1065143 | 404714 | 116539 | 52443 | 33138 |
| 2004 | 44968064 | 10336203 | 3560395 | 1688363 | 737598 | 495764 | 182014 | 50200 | 36133 |
| 2005 | 37637765 | 8269819 | 3504441 | 1672519 | 814529 | 337362 | 220010 | 75717 | 34023 |
| 2006 | 29705601 | 6948175 | 2787028 | 1630989 | 791756 | 366106 | 145943 | 87717 | 40014 |
| 2007 | 28053299 | 5471572 | 2354720 | 1264089 | 757920 | 355839 | 162519 | 60899 | 49374 |
| 2008 | 27152627 | 5201134 | 1854186 | 1074136 | 585246 | 344714 | 163219 | 72921 | 47933 |
| 2009 | 26478513 | 5005025 | 1767927 | 826732 | 482049 | 253695 | 148142 | 69745 | 52534 |
| 2010 | 35185692 | 4874069 | 1697608 | 814938 | 391840 | 222221 | 115162 | 65461 | 55093 |
| 2011 | 30155330 | 6515732 | 1658111 | 802648 | 407420 | 193832 | 110215 | 57018 | 61555 |
| 2012 | 27171800 | 5556716 | 2244354 | 804331 | 410130 | 206148 | 97120 | 54483 | 60651 |
| 2013 | 36361454 | 5017298 | 1899719 | 1087123 | 404568 | 199867 | 99903 | 46523 | 57132 |
| 2014 | 26224168 | 6768671 | 1706900 | 911237 | 545005 | 192405 | 93603 | 45731 | 48664 |
| 2015 | 19598258 | 4829695 | 2339313 | 817645 | 456720 | 268570 | 95442 | 46047 | 46684 |
| 2016 | 17814237 | 3594093 | 1630657 | 1113810 | 400919 | 218133 | 127501 | 44898 | 43705 |
| 2017 | 16614467 | 3270917 | 1205943 | 753277 | 539609 | 186768 | 98400 | 55389 | 38415 |
| 2018 | 13812266 | 3091589 | 1117051 | 555836 | 364764 | 257219 | 83232 | 40555 | 38494 |
| 2019 | 13604945 | 2559640 | 1067342 | 527014 | 271843 | 177139 | 120770 | 37210 | 36065 |
| 2020 | 10376771 | 2512380 | 882990 | 509882 | 263833 | 137226 | 88610 | 58018 | 35104 |
| 2021 | 7787161 | 1924589 | 861590 | 418605 | 259259 | 136748 | 71977 | 45445 | 48098 |
| 2022 | 10427018 | 1425019 | 670267 | 419691 | 219936 | 140961 | 76535 | 40710 | 54122 |
| 2023 | 12967023 | 1925604 | 495714 | 342514 | 226022 | 121897 | 80651 | 44228 | 55899 |
| 2024 | 19073974 | 2394885 | 672713 | 251637 | 186263 | 127112 | 71130 | 48107 | 61356 |