| Table 3. Estimated stock numbers at age. | ||||||||||
| Year Age | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1959 | 17329 | 12375 | 12093 | 2419 | 4309 | 626 | 524 | 161 | 27 | 0 |
| 1960 | 15929 | 14281 | 8742 | 6011 | 1198 | 1903 | 347 | 234 | 99 | 14 |
| 1961 | 23648 | 12568 | 7327 | 3691 | 2560 | 527 | 711 | 142 | 69 | 42 |
| 1962 | 24550 | 19904 | 7283 | 3490 | 1848 | 1144 | 244 | 231 | 54 | 49 |
| 1963 | 20670 | 20428 | 12668 | 3615 | 1728 | 760 | 515 | 133 | 89 | 52 |
| 1964 | 11023 | 17531 | 12694 | 6936 | 1740 | 840 | 345 | 230 | 81 | 75 |
| 1965 | 21005 | 8179 | 13303 | 7783 | 3549 | 840 | 379 | 130 | 123 | 79 |
| 1966 | 25528 | 17806 | 5467 | 8298 | 4042 | 1537 | 358 | 175 | 59 | 96 |
| 1967 | 21446 | 21505 | 13737 | 3639 | 5290 | 2098 | 674 | 113 | 58 | 71 |
| 1968 | 11850 | 18136 | 16438 | 8843 | 2445 | 3112 | 980 | 281 | 33 | 60 |
| 1969 | 9602 | 9420 | 13860 | 10834 | 4576 | 1212 | 1592 | 393 | 159 | 49 |
| 1970 | 12693 | 7570 | 6604 | 8550 | 6058 | 2237 | 558 | 724 | 126 | 89 |
| 1971 | 23088 | 10139 | 5645 | 4038 | 4787 | 3581 | 1163 | 238 | 376 | 110 |
| 1972 | 16750 | 20294 | 8406 | 4057 | 2485 | 2642 | 1656 | 513 | 85 | 230 |
| 1973 | 38507 | 12545 | 16441 | 6391 | 2771 | 1527 | 1077 | 764 | 320 | 194 |
| 1974 | 36580 | 33754 | 9026 | 9765 | 3830 | 1734 | 1061 | 507 | 406 | 294 |
| 1975 | 24777 | 30742 | 25325 | 6745 | 6578 | 2325 | 914 | 513 | 283 | 386 |
| 1976 | 11228 | 20925 | 23491 | 14039 | 3650 | 3598 | 1209 | 523 | 242 | 350 |
| 1977 | 14129 | 8495 | 15207 | 17634 | 7701 | 1680 | 1766 | 450 | 222 | 260 |
| 1978 | 16768 | 11620 | 6848 | 8905 | 9156 | 2917 | 643 | 501 | 148 | 207 |
| 1979 | 26044 | 13447 | 8591 | 5003 | 4614 | 4806 | 1359 | 287 | 211 | 185 |
| 1980 | 17637 | 22735 | 10793 | 5146 | 2742 | 2235 | 2278 | 705 | 114 | 203 |
| 1981 | 27755 | 13529 | 18202 | 6885 | 2795 | 1474 | 1066 | 1169 | 300 | 183 |
| 1982 | 30944 | 23337 | 10109 | 10907 | 3992 | 1412 | 690 | 415 | 539 | 247 |
| 1983 | 52832 | 24514 | 18039 | 6786 | 6036 | 2247 | 766 | 275 | 178 | 377 |
| 1984 | 22708 | 48117 | 18105 | 9104 | 3298 | 2467 | 821 | 214 | 81 | 260 |
| 1985 | 10296 | 18515 | 35536 | 10067 | 3983 | 1432 | 1262 | 410 | 99 | 194 |
| 1986 | 11600 | 7858 | 14324 | 20646 | 4993 | 1690 | 461 | 333 | 101 | 128 |
| 1987 | 11347 | 9601 | 6734 | 7968 | 9082 | 2078 | 602 | 159 | 141 | 110 |
| 1988 | 17257 | 8979 | 7943 | 4642 | 3848 | 4467 | 957 | 292 | 65 | 125 |
| 1989 | 5082 | 16039 | 6785 | 4606 | 2191 | 1766 | 1686 | 349 | 103 | 94 |
| 1990 | 6392 | 3719 | 11157 | 3591 | 1800 | 818 | 561 | 479 | 96 | 84 |
| 1991 | 11016 | 5107 | 2642 | 6181 | 1594 | 711 | 314 | 193 | 134 | 83 |
| 1992 | 11790 | 9357 | 3928 | 1721 | 2859 | 750 | 304 | 138 | 78 | 113 |
| 1993 | 27785 | 9082 | 7762 | 3120 | 965 | 1379 | 336 | 123 | 70 | 113 |
| 1994 | 44618 | 23433 | 7487 | 5553 | 2292 | 571 | 803 | 175 | 67 | 121 |
| 1995 | 12291 | 42320 | 18064 | 6221 | 3807 | 1584 | 377 | 590 | 119 | 129 |
| 1996 | 6395 | 9619 | 32367 | 13238 | 3342 | 2538 | 955 | 216 | 419 | 148 |
| 1997 | 7913 | 5227 | 7515 | 22044 | 7150 | 1131 | 896 | 260 | 53 | 182 |
| 1998 | 15562 | 6804 | 4003 | 5219 | 12062 | 2763 | 287 | 159 | 48 | 96 |
| 1999 | 25274 | 13041 | 5280 | 2795 | 3223 | 5249 | 808 | 87 | 33 | 62 |
| 2000 | 36767 | 21211 | 10618 | 2982 | 1589 | 2019 | 2153 | 211 | 21 | 44 |
| 2001 | 15383 | 34553 | 14959 | 6648 | 1458 | 1060 | 1382 | 943 | 80 | 39 |
| 2002 | 7500 | 13239 | 23711 | 8374 | 3455 | 849 | 687 | 633 | 422 | 59 |
| 2003 | 4872 | 6064 | 8126 | 11862 | 3714 | 1203 | 296 | 174 | 178 | 145 |
| 2004 | 7120 | 3771 | 4124 | 4519 | 4827 | 1282 | 348 | 97 | 59 | 147 |
| 2005 | 9279 | 6129 | 2770 | 2804 | 2863 | 1836 | 393 | 81 | 29 | 113 |
| 2006 | 5972 | 8134 | 4018 | 1545 | 1531 | 1436 | 626 | 127 | 23 | 83 |
| 2007 | 6220 | 4917 | 4876 | 2304 | 875 | 700 | 558 | 213 | 48 | 68 |
| 2008 | 10272 | 4875 | 3726 | 2708 | 1351 | 478 | 322 | 256 | 111 | 75 |
| 2009 | 15450 | 7608 | 5388 | 2294 | 1615 | 746 | 226 | 130 | 102 | 102 |
| 2010 | 5209 | 13178 | 6031 | 2372 | 1067 | 842 | 343 | 109 | 63 | 121 |
| 2011 | 1400 | 4104 | 8384 | 3224 | 938 | 438 | 303 | 116 | 42 | 105 |
| 2012 | 3300 | 1046 | 2624 | 4401 | 1417 | 374 | 183 | 128 | 45 | 97 |
| 2013 | 8349 | 2527 | 1199 | 1620 | 2129 | 572 | 121 | 67 | 46 | 84 |
| 2014 | 3291 | 7242 | 2478 | 964 | 1229 | 1024 | 256 | 58 | 32 | 83 |
| 2015 | 5251 | 2676 | 5294 | 1690 | 597 | 664 | 459 | 113 | 39 | 80 |
| 2016 | 6791 | 4261 | 2444 | 3161 | 832 | 344 | 305 | 160 | 42 | 74 |
| 2017 | 11670 | 5517 | 2944 | 2027 | 1864 | 441 | 192 | 126 | 62 | 74 |
| 2018 | 8523 | 9922 | 4334 | 2492 | 1581 | 1028 | 206 | 102 | 67 | 81 |
| 2019 | 2299 | 6882 | 5873 | 2611 | 1642 | 1062 | 358 | 63 | 36 | 76 |
| 2020 | 2332 | 1542 | 4788 | 2367 | 799 | 430 | 222 | 72 | 13 | 56 |
| 2021 | 5713 | 1800 | 1507 | 2181 | 691 | 214 | 91 | 48 | 16 | 41 |
| 2022 | 4877 | 4848 | 1403 | 1111 | 888 | 205 | 62 | 29 | 22 | 35 |
| 2023 | 7593 | 3979 | 3471 | 885 | 621 | 348 | 84 | 22 | 7 | 36 |
| 2024 | 7283 | 6503 | 2637 | 2163 | 609 | 409 | 178 | 53 | 12 | 33 |
| 2025 | 6912 | 6078 | 4761 | 1999 | 1454 | 364 | 269 | 90 | 22 | 32 |