| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1972 | 12657489 | 10782571 | 2095352 | 75399 | 44942 | 441157 | 8760 | 560 | 2846 |
| 1973 | 30624135 | 3587013 | 2221181 | 529760 | 15876 | 12033 | 149023 | 3214 | 2208 |
| 1974 | 53198871 | 9850971 | 606545 | 680682 | 126657 | 4625 | 4073 | 54880 | 2500 |
| 1975 | 6209091 | 17525142 | 1833883 | 138242 | 186532 | 35856 | 1710 | 1519 | 24644 |
| 1976 | 7248226 | 1728249 | 3447760 | 418901 | 28389 | 50301 | 11158 | 543 | 9737 |
| 1977 | 9353184 | 2088573 | 307637 | 927779 | 87919 | 8432 | 15028 | 3877 | 4125 |
| 1978 | 16024790 | 2735432 | 381529 | 71808 | 247204 | 22579 | 2847 | 5380 | 5208 |
| 1979 | 25274101 | 4678617 | 581558 | 92687 | 16362 | 71229 | 6741 | 981 | 4855 |
| 1980 | 7362800 | 7606126 | 1118156 | 159116 | 21516 | 4772 | 25347 | 2448 | 2859 |
| 1981 | 10812608 | 1925362 | 1887751 | 369578 | 41027 | 6027 | 1907 | 10821 | 2497 |
| 1982 | 6651675 | 3066314 | 411963 | 795666 | 118535 | 14300 | 2409 | 1147 | 7658 |
| 1983 | 17711499 | 1762123 | 702285 | 149177 | 287032 | 42617 | 6741 | 1081 | 4820 |
| 1984 | 6076649 | 5445526 | 423502 | 236832 | 47155 | 92711 | 14850 | 2918 | 2852 |
| 1985 | 7657700 | 1701119 | 1435576 | 149927 | 70045 | 15257 | 33404 | 5933 | 3540 |
| 1986 | 10574474 | 2243823 | 425080 | 544074 | 47746 | 22391 | 5862 | 13977 | 5320 |
| 1987 | 2074816 | 3544551 | 571515 | 114282 | 145988 | 12501 | 7159 | 2526 | 14871 |
| 1988 | 2139366 | 610042 | 1083621 | 164622 | 28893 | 41079 | 4312 | 2376 | 9384 |
| 1989 | 2694358 | 654009 | 153698 | 377867 | 38169 | 7836 | 15120 | 1836 | 4938 |
| 1990 | 5921949 | 819200 | 159611 | 48088 | 97990 | 10281 | 2821 | 6196 | 3109 |
| 1991 | 11165871 | 1916679 | 200600 | 42023 | 12759 | 28312 | 4060 | 1293 | 7059 |
| 1992 | 16131150 | 3131446 | 625425 | 59711 | 9984 | 4024 | 10328 | 1622 | 5877 |
| 1993 | 4709226 | 4422873 | 854371 | 254549 | 22119 | 3909 | 1644 | 5289 | 5796 |
| 1994 | 15081105 | 1300371 | 1085102 | 226006 | 66263 | 7532 | 1675 | 771 | 7090 |
| 1995 | 6468453 | 5288789 | 383773 | 393023 | 65672 | 20491 | 3472 | 761 | 3708 |
| 1996 | 7273921 | 1603499 | 1633205 | 153976 | 120039 | 20862 | 8304 | 2011 | 1961 |
| 1997 | 4331774 | 2290168 | 427346 | 651471 | 45768 | 33393 | 8412 | 4006 | 2015 |
| 1998 | 2622404 | 1343932 | 606892 | 162319 | 207417 | 19024 | 14363 | 4565 | 4574 |
| 1999 | 24769825 | 768835 | 333380 | 204118 | 60043 | 64346 | 7874 | 7389 | 6248 |
| 2000 | 7077921 | 8543078 | 209962 | 99454 | 50006 | 18330 | 21843 | 3463 | 5461 |
| 2001 | 1952861 | 2234236 | 3399015 | 99010 | 32703 | 17483 | 8626 | 9334 | 5479 |
| 2002 | 2187797 | 619229 | 687353 | 1633359 | 36177 | 16292 | 8551 | 5720 | 11873 |
| 2003 | 1283728 | 603037 | 135460 | 362185 | 791979 | 15102 | 7399 | 4979 | 9754 |
| 2004 | 1252587 | 398487 | 154835 | 61328 | 209348 | 454564 | 8264 | 4619 | 8055 |
| 2005 | 5425761 | 350539 | 102141 | 65480 | 32176 | 114387 | 259334 | 5312 | 7291 |
| 2006 | 1731551 | 1900184 | 100814 | 48156 | 30201 | 18710 | 61907 | 157861 | 9967 |
| 2007 | 1131367 | 617162 | 794753 | 49696 | 26749 | 14351 | 9738 | 38043 | 121886 |
| 2008 | 957806 | 341108 | 172051 | 360411 | 21166 | 13183 | 8291 | 5765 | 78507 |
| 2009 | 4726135 | 302353 | 106941 | 88943 | 204968 | 9982 | 6298 | 5576 | 28214 |
| 2010 | 782704 | 1947250 | 111168 | 65298 | 55036 | 137417 | 6910 | 4229 | 16411 |
| 2011 | 459454 | 237135 | 798532 | 74672 | 41356 | 37230 | 110376 | 4727 | 12028 |
| 2012 | 960276 | 142772 | 67859 | 436765 | 31390 | 24123 | 23001 | 77038 | 11323 |
| 2013 | 881646 | 276439 | 35998 | 37276 | 266394 | 15329 | 14164 | 12897 | 86756 |
| 2014 | 6674602 | 274910 | 86390 | 17738 | 25547 | 171797 | 8992 | 9115 | 49648 |
| 2015 | 1456391 | 1998923 | 77484 | 41861 | 8367 | 15270 | 101585 | 6289 | 29200 |
| 2016 | 1840663 | 475061 | 534896 | 33775 | 17238 | 4051 | 6036 | 70029 | 13705 |
| 2017 | 929881 | 674844 | 165043 | 285923 | 15931 | 7898 | 2006 | 4255 | 58171 |
| 2018 | 2746538 | 290856 | 183537 | 79719 | 174044 | 6603 | 4128 | 1352 | 24420 |
| 2019 | 8744818 | 1165120 | 89356 | 90489 | 36512 | 104511 | 3441 | 2582 | 7483 |
| 2020 | 7814050 | 3569514 | 322047 | 52184 | 59741 | 20289 | 68774 | 2012 | 6838 |
| 2021 | 2434865 | 3040809 | 1428685 | 162666 | 32280 | 36411 | 10269 | 53663 | 3865 |
| 2022 | 5762886 | 938858 | 1552142 | 1116733 | 104058 | 21871 | 21625 | 6727 | 49441 |
| 2023 | 1328728 | 2262482 | 499583 | 1265270 | 765576 | 64883 | 15134 | 14562 | 26752 |
| 2024 | 1533269 | 544501 | 1028818 | 433891 | 910975 | 420420 | 33323 | 8538 | 15822 |
| 2025 | 1034819 | 500866 | 270400 | 821870 | 371450 | 577299 | 266823 | 20329 | 10997 |
| 2026 | 1034819 | 334664 | 143400 | 157012 | 587383 | 311872 | 409882 | 164501 | 31804 |