| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 1958 | 688093 | 60423 | 291978 | 164523 | 99338 | 184595 | 86914 | 108062 | 161658 |
| 1959 | 1074369 | 295234 | 39884 | 179007 | 96512 | 61981 | 115094 | 50686 | 189454 |
| 1960 | 577232 | 565828 | 168847 | 29925 | 113909 | 56922 | 40521 | 69004 | 164188 |
| 1961 | 578951 | 228506 | 380137 | 88695 | 22018 | 70630 | 36096 | 24692 | 165087 |
| 1962 | 656687 | 232287 | 129084 | 271731 | 53396 | 16688 | 47682 | 24913 | 132162 |
| 1963 | 363396 | 338995 | 132076 | 67849 | 175810 | 29657 | 10693 | 28485 | 107013 |
| 1964 | 1795737 | 169357 | 208688 | 77333 | 43470 | 116852 | 17923 | 6971 | 97285 |
| 1965 | 240555 | 780619 | 106305 | 131447 | 46488 | 33760 | 80665 | 11550 | 80953 |
| 1966 | 909621 | 133918 | 441307 | 68595 | 78754 | 29348 | 23734 | 50456 | 61440 |
| 1967 | 887065 | 379109 | 93101 | 234519 | 42677 | 43149 | 16360 | 15591 | 71246 |
| 1968 | 1004974 | 379595 | 215178 | 59126 | 119731 | 24872 | 21978 | 8157 | 55194 |
| 1969 | 568242 | 436804 | 206323 | 119958 | 39447 | 63580 | 14839 | 11550 | 40777 |
| 1970 | 237495 | 241750 | 218381 | 97064 | 60619 | 22807 | 29819 | 7638 | 32634 |
| 1971 | 710259 | 110589 | 129746 | 106359 | 47370 | 30294 | 12660 | 15152 | 24072 |
| 1972 | 310283 | 342371 | 58503 | 56006 | 45028 | 19713 | 13280 | 6402 | 21045 |
| 1973 | 347244 | 130878 | 158435 | 28692 | 27164 | 20392 | 9411 | 6906 | 17291 |
| 1974 | 151091 | 140094 | 55865 | 68678 | 14895 | 12538 | 9411 | 4271 | 14894 |
| 1975 | 185592 | 64198 | 60403 | 25300 | 31031 | 8193 | 6034 | 4515 | 12817 |
| 1976 | 234008 | 73171 | 31103 | 25643 | 11664 | 14015 | 4088 | 2958 | 10945 |
| 1977 | 202063 | 96237 | 38388 | 15597 | 11779 | 5858 | 6354 | 1803 | 7779 |
| 1978 | 130101 | 84875 | 54768 | 20457 | 8192 | 6923 | 3044 | 3520 | 6155 |
| 1979 | 221666 | 57799 | 46189 | 29505 | 10710 | 4507 | 4144 | 1688 | 5886 |
| 1980 | 160747 | 93656 | 29090 | 21507 | 14456 | 5106 | 2206 | 2161 | 4473 |
| 1981 | 457143 | 64838 | 40734 | 12023 | 9492 | 7341 | 2080 | 817 | 3609 |
| 1982 | 606518 | 178313 | 24603 | 13014 | 4141 | 3413 | 3022 | 712 | 2268 |
| 1983 | 686961 | 277789 | 78639 | 9396 | 4794 | 1625 | 1257 | 1264 | 1389 |
| 1984 | 668975 | 315713 | 127549 | 32618 | 4143 | 1945 | 816 | 545 | 1107 |
| 1985 | 753852 | 283505 | 143850 | 46332 | 11114 | 1411 | 615 | 384 | 813 |
| 1986 | 587079 | 308505 | 143238 | 76111 | 23131 | 5770 | 773 | 338 | 632 |
| 1987 | 908151 | 269050 | 153090 | 67648 | 37302 | 10833 | 3274 | 528 | 797 |
| 1988 | 480398 | 456070 | 135095 | 62009 | 27789 | 15177 | 4638 | 1653 | 646 |
| 1989 | 653384 | 216851 | 276669 | 70797 | 35671 | 14668 | 8025 | 2642 | 1493 |
| 1990 | 448194 | 277901 | 114201 | 147688 | 34432 | 19543 | 7120 | 3667 | 2023 |
| 1991 | 245485 | 207965 | 149025 | 61476 | 85714 | 17937 | 11943 | 3683 | 2998 |
| 1992 | 864783 | 103464 | 99933 | 71366 | 30974 | 43764 | 8579 | 7178 | 3347 |
| 1993 | 352306 | 415900 | 44967 | 40222 | 29622 | 13819 | 18647 | 3446 | 4260 |
| 1994 | 835186 | 161471 | 229083 | 23223 | 20512 | 17290 | 8065 | 9174 | 4405 |
| 1995 | 710696 | 359904 | 84093 | 118221 | 13616 | 11554 | 9567 | 4741 | 7666 |
| 1996 | 371888 | 317281 | 174697 | 40729 | 54993 | 7293 | 5795 | 4769 | 7238 |
| 1997 | 359133 | 165637 | 167670 | 88029 | 22334 | 25836 | 3954 | 2950 | 6680 |
| 1998 | 294624 | 167167 | 83169 | 76166 | 40408 | 10850 | 11904 | 2062 | 5724 |
| 1999 | 463569 | 122771 | 84388 | 35888 | 32896 | 17860 | 4985 | 6098 | 5028 |
| 2000 | 450813 | 198047 | 50273 | 31248 | 13175 | 11472 | 6267 | 2145 | 6241 |
| 2001 | 514221 | 202003 | 77628 | 18352 | 12518 | 5106 | 3904 | 2501 | 5247 |
| 2002 | 405918 | 214037 | 93480 | 28510 | 8102 | 5893 | 2302 | 1661 | 4946 |
| 2003 | 158935 | 194601 | 116421 | 47873 | 13870 | 4787 | 3334 | 1286 | 4523 |
| 2004 | 346200 | 64575 | 115587 | 47515 | 18983 | 4724 | 1743 | 1138 | 3279 |
| 2005 | 952175 | 155327 | 33639 | 54718 | 21472 | 8208 | 1929 | 804 | 2922 |
| 2006 | 362997 | 436964 | 80484 | 17080 | 27656 | 10080 | 4106 | 996 | 2545 |
| 2007 | 826186 | 169272 | 291068 | 45529 | 10782 | 16189 | 5971 | 2543 | 2128 |
| 2008 | 366021 | 367288 | 115698 | 190629 | 29004 | 7264 | 9893 | 4087 | 3396 |
| 2009 | 1264124 | 157648 | 239263 | 80241 | 131155 | 18859 | 5057 | 7168 | 6034 |
| 2010 | 794886 | 546706 | 103984 | 162750 | 59229 | 90229 | 13062 | 3533 | 10151 |
| 2011 | 1089977 | 377668 | 335364 | 65085 | 104694 | 42313 | 54805 | 9381 | 9227 |
| 2012 | 767153 | 514345 | 252516 | 198467 | 41001 | 64762 | 28688 | 33605 | 12995 |
| 2013 | 429796 | 332070 | 289098 | 134191 | 101650 | 23547 | 32908 | 16882 | 29656 |
| 2014 | 372508 | 184309 | 194562 | 160535 | 79840 | 56565 | 14727 | 19194 | 32618 |
| 2015 | 101761 | 139503 | 103258 | 102287 | 88589 | 44877 | 28425 | 8731 | 35886 |
| 2016 | 156584 | 52645 | 79305 | 51169 | 51370 | 45501 | 21239 | 12452 | 27302 |
| 2017 | 71087 | 70611 | 33805 | 29159 | 19383 | 18936 | 16537 | 7390 | 24022 |