| Table 3. Estimated stock numbers at age. | ||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 1960 | 83534 | 120302 | 62034 | 27730 | 29702 | 18830 | 11711 | 7645 | 4142 | 12304 |
| 1961 | 109608 | 54513 | 81135 | 32853 | 16730 | 16781 | 10448 | 7727 | 5540 | 12356 |
| 1962 | 201047 | 64802 | 34919 | 52538 | 20488 | 13123 | 12053 | 7147 | 5878 | 14209 |
| 1963 | 280076 | 127719 | 36612 | 27067 | 32171 | 12796 | 10940 | 8720 | 5329 | 15434 |
| 1964 | 93748 | 194637 | 73432 | 21407 | 19856 | 21081 | 8795 | 8622 | 6722 | 16853 |
| 1965 | 274806 | 60311 | 112803 | 46076 | 14893 | 12756 | 14555 | 5331 | 6015 | 16431 |
| 1966 | 127228 | 200289 | 41706 | 60669 | 27054 | 9853 | 7861 | 7868 | 3455 | 15290 |
| 1967 | 185730 | 76951 | 126492 | 21471 | 33339 | 16671 | 7249 | 5829 | 4980 | 12277 |
| 1968 | 140855 | 126892 | 42453 | 70294 | 13144 | 22611 | 10510 | 4933 | 3721 | 9381 |
| 1969 | 266341 | 87220 | 90616 | 30604 | 45988 | 11636 | 18136 | 7324 | 3361 | 7262 |
| 1970 | 228137 | 166173 | 54997 | 61507 | 22028 | 35217 | 10812 | 16046 | 5348 | 7920 |
| 1971 | 238973 | 151378 | 81846 | 34097 | 34141 | 13121 | 18252 | 7722 | 10474 | 8384 |
| 1972 | 154278 | 145034 | 93520 | 43232 | 23186 | 18365 | 9606 | 10575 | 5044 | 10559 |
| 1973 | 202570 | 80902 | 83538 | 57317 | 26376 | 15807 | 12104 | 7758 | 6527 | 9510 |
| 1974 | 103800 | 111252 | 41353 | 53180 | 37485 | 16424 | 11067 | 8411 | 4846 | 8993 |
| 1975 | 170721 | 45941 | 50656 | 18493 | 24731 | 20705 | 9457 | 6816 | 5046 | 7253 |
| 1976 | 230210 | 75785 | 19892 | 25936 | 10166 | 10918 | 8871 | 4958 | 3309 | 5680 |
| 1977 | 212475 | 90452 | 30569 | 8572 | 13795 | 5364 | 5771 | 4182 | 2446 | 4046 |
| 1978 | 134708 | 92852 | 37229 | 15537 | 4725 | 7241 | 3154 | 3211 | 2370 | 4064 |
| 1979 | 206212 | 59260 | 39725 | 16755 | 8331 | 2386 | 4186 | 1669 | 1588 | 3396 |
| 1980 | 123218 | 101778 | 22761 | 16972 | 8787 | 3763 | 1036 | 2099 | 855 | 2610 |
| 1981 | 267357 | 61102 | 48200 | 9745 | 8128 | 4688 | 1759 | 585 | 1073 | 1720 |
| 1982 | 125760 | 151309 | 26388 | 20589 | 4484 | 4277 | 2121 | 962 | 319 | 1526 |
| 1983 | 95541 | 66915 | 69664 | 9498 | 9242 | 2629 | 2406 | 1109 | 543 | 1105 |
| 1984 | 91728 | 53893 | 28726 | 25170 | 3851 | 4580 | 1295 | 1270 | 587 | 882 |
| 1985 | 86708 | 42861 | 21645 | 12434 | 8879 | 1834 | 2119 | 552 | 578 | 682 |
| 1986 | 185006 | 42658 | 18183 | 11435 | 5812 | 3338 | 880 | 964 | 252 | 552 |
| 1987 | 168577 | 139086 | 18778 | 8783 | 6173 | 2494 | 1309 | 421 | 423 | 361 |
| 1988 | 81729 | 125024 | 84141 | 10476 | 4001 | 2442 | 1305 | 476 | 188 | 312 |
| 1989 | 72736 | 54612 | 73920 | 42161 | 4731 | 1335 | 896 | 564 | 155 | 217 |
| 1990 | 73599 | 44175 | 27839 | 28706 | 18024 | 2389 | 631 | 448 | 291 | 190 |
| 1991 | 234348 | 42374 | 20952 | 15199 | 12216 | 7734 | 1233 | 315 | 234 | 251 |
| 1992 | 313006 | 153668 | 20233 | 11122 | 8815 | 6554 | 4065 | 667 | 171 | 270 |
| 1993 | 231929 | 239232 | 87017 | 9822 | 4423 | 3478 | 2578 | 2030 | 302 | 202 |
| 1994 | 149928 | 181695 | 152042 | 41598 | 4405 | 1819 | 1543 | 1028 | 1035 | 241 |
| 1995 | 285947 | 124973 | 132022 | 90082 | 14905 | 1891 | 836 | 789 | 458 | 660 |
| 1996 | 151685 | 250537 | 81945 | 70041 | 50664 | 8293 | 1057 | 487 | 446 | 650 |
| 1997 | 170541 | 113455 | 182570 | 55571 | 45043 | 27108 | 4198 | 540 | 268 | 604 |
| 1998 | 108911 | 145097 | 74463 | 134536 | 32072 | 25495 | 14419 | 2684 | 330 | 544 |
| 1999 | 255781 | 81084 | 107737 | 48144 | 77005 | 17474 | 16470 | 9417 | 1666 | 551 |
| 2000 | 140204 | 209527 | 52813 | 57849 | 28748 | 41662 | 12364 | 11774 | 5421 | 1334 |
| 2001 | 208293 | 99264 | 158880 | 39388 | 34979 | 17551 | 25054 | 8641 | 7455 | 3929 |
| 2002 | 319216 | 168577 | 72007 | 105670 | 27519 | 21880 | 12588 | 16471 | 5367 | 7248 |
| 2003 | 161656 | 285316 | 103451 | 45835 | 53008 | 21471 | 15060 | 9783 | 10227 | 7919 |
| 2004 | 156095 | 137008 | 194491 | 67940 | 33737 | 34832 | 12476 | 9586 | 6432 | 10666 |
| 2005 | 401361 | 117463 | 74547 | 111582 | 48537 | 22935 | 27457 | 8557 | 4479 | 7992 |
| 2006 | 73315 | 332421 | 75373 | 43826 | 65948 | 28525 | 17514 | 15702 | 4754 | 6707 |
| 2007 | 89634 | 53009 | 196333 | 51648 | 28104 | 35081 | 21719 | 10815 | 7213 | 4387 |
| 2008 | 212648 | 60356 | 34899 | 96403 | 30177 | 15778 | 20722 | 12480 | 5013 | 5176 |
| 2009 | 118706 | 163451 | 38890 | 24018 | 54475 | 14293 | 8040 | 10492 | 6168 | 4500 |
| 2010 | 286415 | 78361 | 96291 | 27262 | 12523 | 33879 | 7693 | 3848 | 4339 | 4627 |
| 2011 | 121319 | 216823 | 42948 | 47911 | 17273 | 7832 | 16132 | 4136 | 1900 | 3940 |
| 2012 | 117924 | 96889 | 123877 | 30114 | 23226 | 9754 | 4347 | 7601 | 1960 | 2818 |
| 2013 | 247996 | 69399 | 67278 | 81035 | 18701 | 12156 | 4918 | 2404 | 3732 | 2456 |
| 2014 | 99309 | 197495 | 50722 | 42183 | 46156 | 11475 | 7105 | 3116 | 1408 | 3499 |
| 2015 | 147489 | 72808 | 128921 | 37285 | 27595 | 27099 | 6528 | 3809 | 1922 | 3054 |
| 2016 | 260903 | 103508 | 51537 | 67981 | 24086 | 16852 | 15120 | 3744 | 2486 | 3649 |
| 2017 | 192453 | 215651 | 72436 | 30933 | 35925 | 14626 | 9777 | 7702 | 2049 | 4331 |
| 2018 | 146401 | 158302 | 185914 | 52210 | 20389 | 19289 | 9045 | 5916 | 4286 | 4089 |
| 2019 | 259003 | 125878 | 99701 | 116267 | 31787 | 12054 | 10409 | 4959 | 3092 | 4700 |
| 2020 | 125722 | 226836 | 90136 | 67863 | 68930 | 18433 | 7360 | 5771 | 2805 | 4841 |
| 2021 | 165002 | 99647 | 173182 | 61835 | 40098 | 38202 | 10396 | 4380 | 3348 | 5080 |
| 2022 | 139842 | 131797 | 80614 | 118260 | 41233 | 21774 | 17758 | 4812 | 2197 | 4922 |
| 2023 | 59193 | 106084 | 102564 | 53891 | 59053 | 22658 | 13420 | 8867 | 2520 | 3824 |
| 2024 | 176794 | 41944 | 70846 | 56700 | 28086 | 27187 | 10782 | 6195 | 4373 | 3092 |
| 2025 | 196965 | 145349 | 31884 | 37904 | 25725 | 12800 | 11370 | 5076 | 2815 | 3659 |
| pred | 149892 | 94992 | 18418 | 19745 | 13137 | 6654 | 5911 | 2639 | 3365 | |