| Table 3. Estimated stock numbers at age. | ||||||||||
| Year Age | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1957 | 26238 | 35871 | 25266 | 20653 | 5421 | 2596 | 1226 | 470 | 202 | 116 |
| 1958 | 32708 | 29650 | 25033 | 14199 | 9572 | 2987 | 1322 | 476 | 178 | 121 |
| 1959 | 59145 | 29580 | 22759 | 12881 | 6336 | 4428 | 1289 | 393 | 134 | 68 |
| 1960 | 80375 | 40267 | 24174 | 13059 | 6170 | 3285 | 1797 | 382 | 103 | 40 |
| 1961 | 81852 | 56373 | 24438 | 12861 | 5651 | 3018 | 1349 | 428 | 90 | 23 |
| 1962 | 80682 | 53239 | 36144 | 12419 | 6481 | 2967 | 1347 | 395 | 109 | 26 |
| 1963 | 41338 | 61992 | 27942 | 16588 | 5468 | 3559 | 1249 | 363 | 82 | 24 |
| 1964 | 18419 | 29088 | 33636 | 11839 | 6601 | 2574 | 1689 | 301 | 61 | 11 |
| 1965 | 17464 | 16596 | 20850 | 17337 | 5325 | 3130 | 1137 | 736 | 62 | 11 |
| 1966 | 30916 | 15007 | 13713 | 13364 | 8411 | 2746 | 1289 | 302 | 102 | 11 |
| 1967 | 44034 | 24071 | 12330 | 9053 | 7006 | 4154 | 1217 | 365 | 69 | 20 |
| 1968 | 28939 | 45856 | 18525 | 8761 | 5446 | 4150 | 1935 | 415 | 102 | 19 |
| 1969 | 31883 | 26399 | 32652 | 11697 | 5169 | 3327 | 2099 | 670 | 125 | 29 |
| 1970 | 20138 | 25787 | 20658 | 19257 | 5703 | 3103 | 1575 | 684 | 202 | 30 |
| 1971 | 24222 | 13925 | 19964 | 13231 | 9850 | 3114 | 1557 | 510 | 271 | 111 |
| 1972 | 29280 | 19630 | 10278 | 13005 | 7041 | 5035 | 1442 | 572 | 180 | 133 |
| 1973 | 121408 | 25836 | 19907 | 4834 | 7500 | 3484 | 3108 | 568 | 288 | 81 |
| 1974 | 112493 | 83428 | 16311 | 12032 | 2309 | 4036 | 1879 | 1882 | 294 | 282 |
| 1975 | 70268 | 93596 | 50952 | 9690 | 6694 | 1452 | 2347 | 1066 | 1173 | 380 |
| 1976 | 25777 | 66680 | 55192 | 28895 | 5919 | 4220 | 1085 | 1743 | 659 | 855 |
| 1977 | 8741 | 18500 | 43032 | 30140 | 15198 | 3888 | 2400 | 743 | 977 | 857 |
| 1978 | 1065 | 8077 | 15331 | 28102 | 17345 | 6960 | 1702 | 1100 | 313 | 499 |
| 1979 | 4943 | 565 | 12037 | 12600 | 17999 | 9749 | 3315 | 659 | 380 | 204 |
| 1980 | 6197 | 5377 | 655 | 13222 | 9530 | 11241 | 6083 | 1784 | 275 | 219 |
| 1981 | 17969 | 4589 | 4033 | 734 | 10112 | 5871 | 6876 | 3630 | 812 | 182 |
| 1982 | 22128 | 16282 | 3461 | 2736 | 617 | 7071 | 3677 | 4324 | 2765 | 573 |
| 1983 | 44337 | 17085 | 12751 | 1687 | 1467 | 352 | 4418 | 2185 | 2535 | 1878 |
| 1984 | 39903 | 39899 | 12852 | 8603 | 788 | 797 | 220 | 2577 | 1154 | 2427 |
| 1985 | 20120 | 33979 | 31579 | 9160 | 4713 | 450 | 427 | 167 | 1336 | 1968 |
| 1986 | 13563 | 15904 | 25562 | 21198 | 5701 | 2519 | 213 | 261 | 105 | 1524 |
| 1987 | 21846 | 10006 | 14810 | 18622 | 12867 | 3372 | 1298 | 131 | 113 | 677 |
| 1988 | 9371 | 20925 | 6228 | 12384 | 12595 | 7741 | 1756 | 561 | 51 | 306 |
| 1989 | 6929 | 7188 | 14963 | 4323 | 9121 | 8094 | 4562 | 1003 | 272 | 159 |
| 1990 | 3323 | 5971 | 7795 | 9725 | 3018 | 5456 | 4554 | 2134 | 401 | 170 |
| 1991 | 2863 | 2536 | 5544 | 6432 | 5736 | 1929 | 2902 | 2146 | 872 | 151 |
| 1992 | 4043 | 2209 | 1676 | 3799 | 4183 | 3523 | 1100 | 1437 | 1117 | 490 |
| 1993 | 21546 | 2825 | 1899 | 1180 | 2425 | 2530 | 2115 | 619 | 804 | 815 |
| 1994 | 25914 | 9208 | 1594 | 1380 | 729 | 1542 | 1644 | 1382 | 402 | 1036 |
| 1995 | 43115 | 37855 | 4387 | 1010 | 855 | 465 | 1030 | 1038 | 866 | 916 |
| 1996 | 10082 | 34925 | 50637 | 2719 | 531 | 451 | 349 | 677 | 635 | 1118 |
| 1997 | 3415 | 8013 | 28949 | 44846 | 1632 | 313 | 205 | 225 | 404 | 1081 |
| 1998 | 13428 | 2710 | 6321 | 20034 | 29438 | 930 | 110 | 112 | 117 | 784 |
| 1999 | 22987 | 13111 | 1825 | 3846 | 12845 | 15578 | 372 | 24 | 33 | 333 |
| 2000 | 106907 | 21215 | 13089 | 749 | 1958 | 6687 | 7421 | 137 | 4 | 131 |
| 2001 | 53941 | 98251 | 16696 | 7064 | 375 | 1130 | 3432 | 4026 | 53 | 57 |
| 2002 | 38183 | 42324 | 86787 | 8960 | 3388 | 272 | 681 | 2070 | 2421 | 62 |
| 2003 | 22449 | 25359 | 32133 | 52069 | 5000 | 1561 | 180 | 494 | 1169 | 1337 |
| 2004 | 6775 | 20916 | 21617 | 21322 | 33272 | 2262 | 559 | 91 | 199 | 954 |
| 2005 | 8713 | 5451 | 16584 | 16902 | 16508 | 18197 | 786 | 181 | 30 | 270 |
| 2006 | 2709 | 8652 | 3624 | 11437 | 11508 | 10955 | 6083 | 286 | 57 | 68 |
| 2007 | 2894 | 2544 | 6026 | 2298 | 7587 | 7623 | 5270 | 1704 | 109 | 20 |
| 2008 | 3527 | 2557 | 1795 | 3707 | 1621 | 4640 | 3986 | 2058 | 479 | 38 |
| 2009 | 7062 | 2141 | 1843 | 1254 | 2181 | 1305 | 2856 | 1715 | 639 | 107 |
| 2010 | 10186 | 6156 | 1781 | 1228 | 805 | 1204 | 1042 | 1498 | 735 | 246 |
| 2011 | 831 | 9936 | 3951 | 942 | 620 | 511 | 571 | 600 | 582 | 283 |
| 2012 | 1926 | 723 | 8871 | 1882 | 479 | 306 | 325 | 228 | 264 | 227 |
| 2013 | 6984 | 1662 | 1259 | 5712 | 964 | 265 | 182 | 153 | 104 | 165 |
| 2014 | 8500 | 6055 | 1594 | 1482 | 2986 | 408 | 146 | 86 | 45 | 74 |
| 2015 | 6965 | 7258 | 5398 | 1016 | 1463 | 1108 | 167 | 76 | 38 | 34 |
| 2016 | 21623 | 5916 | 5528 | 2687 | 589 | 966 | 384 | 64 | 36 | 20 |
| 2017 | 29790 | 14410 | 4092 | 3517 | 1365 | 366 | 471 | 152 | 26 | 14 |
| 2018 | 39921 | 28132 | 10924 | 3030 | 2224 | 790 | 265 | 224 | 50 | 10 |
| 2019 | 16710 | 25144 | 17775 | 6056 | 1897 | 1136 | 361 | 175 | 65 | 7 |
| 2020 | 6312 | 12020 | 18650 | 7768 | 1568 | 597 | 302 | 111 | 56 | 5 |
| 2021 | 16069 | 5154 | 14199 | 14612 | 1642 | 289 | 74 | 58 | 23 | 4 |
| 2022 | 32290 | 16207 | 6977 | 19022 | 5984 | 329 | 65 | 16 | 25 | 5 |
| 2023 | 38917 | 24013 | 10045 | 9213 | 13467 | 2234 | 93 | 23 | 9 | 11 |
| 2024 | 106984 | 34688 | 15043 | 7431 | 8459 | 8358 | 1203 | 21 | 13 | 8 |
| 2025 | 75510 | 73276 | 20904 | 12172 | 5618 | 6541 | 4960 | 847 | 13 | 10 |