| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 30732826 | 8366826 | 1817655 | 801652 | 229977 | 19619 | 13626 | 4036 | 1679 |
| 1979 | 22533074 | 9221524 | 2266045 | 638995 | 275860 | 73324 | 6240 | 4222 | 2375 |
| 1980 | 13201061 | 6810652 | 2504145 | 778684 | 204273 | 88690 | 21497 | 2120 | 3322 |
| 1981 | 12212306 | 3469165 | 2062985 | 904307 | 244043 | 57492 | 21419 | 6241 | 2342 |
| 1982 | 9893949 | 3153479 | 849420 | 806095 | 283683 | 66639 | 13590 | 5530 | 3508 |
| 1983 | 12485940 | 2508280 | 764224 | 327310 | 297266 | 96508 | 18658 | 4391 | 4774 |
| 1984 | 11459066 | 3553198 | 608453 | 279818 | 106502 | 95554 | 27848 | 6186 | 4562 |
| 1985 | 17602019 | 3000644 | 969615 | 219185 | 83328 | 28498 | 25896 | 7489 | 4826 |
| 1986 | 16070945 | 5498727 | 834872 | 405514 | 79696 | 25645 | 6888 | 7391 | 4392 |
| 1987 | 14432943 | 4729645 | 1578564 | 308934 | 141085 | 20370 | 6177 | 1793 | 4278 |
| 1988 | 17715973 | 4125417 | 1528487 | 569194 | 97457 | 38155 | 4309 | 1465 | 2221 |
| 1989 | 11505732 | 5617952 | 1022477 | 598595 | 182846 | 28718 | 10537 | 1471 | 2495 |
| 1990 | 10841757 | 3162524 | 1797304 | 388811 | 218510 | 56516 | 7136 | 3560 | 2100 |
| 1991 | 12604655 | 2911391 | 837158 | 705674 | 119288 | 69475 | 19062 | 2893 | 3247 |
| 1992 | 14275213 | 3457934 | 886359 | 322618 | 287178 | 38595 | 22821 | 9562 | 2841 |
| 1993 | 14462089 | 3886205 | 912674 | 367583 | 130386 | 112803 | 13118 | 8884 | 7486 |
| 1994 | 13159745 | 3813688 | 1046348 | 340807 | 129937 | 47407 | 39066 | 5214 | 6875 |
| 1995 | 10216777 | 3331199 | 1050870 | 412413 | 122523 | 42725 | 14978 | 15469 | 6237 |
| 1996 | 8447665 | 2307333 | 889445 | 427274 | 162998 | 45117 | 15240 | 6048 | 13526 |
| 1997 | 11969501 | 1773778 | 586622 | 376279 | 163664 | 65015 | 16466 | 6433 | 9584 |
| 1998 | 18115850 | 2555687 | 450515 | 249922 | 157743 | 65479 | 27191 | 8024 | 8948 |
| 1999 | 17991780 | 3903746 | 667148 | 190341 | 118810 | 67442 | 28529 | 11884 | 8567 |
| 2000 | 14663803 | 3520816 | 1028966 | 269444 | 82680 | 46740 | 27102 | 13733 | 11711 |
| 2001 | 14103681 | 2698590 | 1078727 | 427189 | 113240 | 32411 | 19729 | 11471 | 16502 |
| 2002 | 9584071 | 2517993 | 791734 | 595106 | 208004 | 50815 | 13023 | 9398 | 12490 |
| 2003 | 8669871 | 1432199 | 650083 | 413386 | 306425 | 98211 | 23936 | 6202 | 11397 |
| 2004 | 8785251 | 1251518 | 290412 | 283740 | 216121 | 146935 | 54727 | 13113 | 9185 |
| 2005 | 8416084 | 1300976 | 308750 | 118146 | 139733 | 109416 | 73408 | 29540 | 14084 |
| 2006 | 6465784 | 1272782 | 356533 | 130759 | 59155 | 74972 | 59082 | 36964 | 23684 |
| 2007 | 8091351 | 888927 | 332976 | 161139 | 56694 | 28289 | 37773 | 29613 | 35876 |
| 2008 | 8022517 | 1282867 | 235365 | 152389 | 74930 | 25657 | 13008 | 19023 | 40980 |
| 2009 | 7440016 | 1322458 | 345280 | 99606 | 67237 | 36915 | 12491 | 6508 | 30740 |
| 2010 | 7644091 | 1236064 | 402676 | 141850 | 47952 | 32162 | 16997 | 5533 | 20001 |
| 2011 | 6170762 | 1289042 | 406905 | 186519 | 69678 | 23133 | 13682 | 6953 | 13372 |
| 2012 | 5358364 | 916581 | 420632 | 181137 | 91184 | 35046 | 10718 | 6088 | 13069 |
| 2013 | 8248420 | 711014 | 242142 | 209391 | 92860 | 39988 | 15403 | 4712 | 10197 |
| 2014 | 9201797 | 1259125 | 218637 | 116054 | 107194 | 43438 | 17981 | 7500 | 9594 |
| 2015 | 9065861 | 1394317 | 421620 | 94042 | 57583 | 51368 | 18375 | 8173 | 10132 |
| 2016 | 10684284 | 1328370 | 427481 | 174584 | 44150 | 25897 | 20756 | 8636 | 9871 |
| 2017 | 7701549 | 1748705 | 419861 | 174054 | 70997 | 19931 | 9694 | 9642 | 9671 |
| 2018 | 10522019 | 1113727 | 532306 | 187415 | 77284 | 29765 | 7826 | 4680 | 8359 |
| 2019 | 17993366 | 1774529 | 342968 | 237657 | 89564 | 32797 | 11622 | 4072 | 5599 |
| 2020 | 17483486 | 3737697 | 506531 | 166405 | 111417 | 37683 | 14147 | 5357 | 4065 |
| 2021 | 9725755 | 3675007 | 1284745 | 228718 | 88933 | 50616 | 18499 | 7722 | 3839 |
| 2022 | 11292494 | 1685553 | 1264487 | 666926 | 119816 | 44541 | 26284 | 10389 | 7301 |
| 2023 | 8738875 | 2352179 | 588665 | 655449 | 376637 | 61363 | 22910 | 16153 | 10395 |
| 2024 | 11093877 | 1607649 | 726808 | 303143 | 413212 | 221628 | 31710 | 12786 | 15582 |
| 2025 | 11093877 | 2217539 | 506108 | 357350 | 166926 | 232344 | 129433 | 19968 | 19581 |