| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 29110160 | 8604036 | 1810814 | 805922 | 229611 | 19982 | 13867 | 4275 | 1979 |
| 1979 | 22478943 | 8784231 | 2244941 | 637997 | 276577 | 73341 | 6371 | 4512 | 2804 |
| 1980 | 13924456 | 7019357 | 2452911 | 776585 | 204776 | 88830 | 22085 | 2218 | 3850 |
| 1981 | 12922654 | 3726204 | 2056404 | 878086 | 238978 | 56973 | 21688 | 6557 | 2793 |
| 1982 | 9838458 | 3234755 | 839207 | 799586 | 281989 | 65983 | 13790 | 5846 | 4108 |
| 1983 | 12189534 | 2463239 | 734813 | 324486 | 302941 | 96575 | 19162 | 4615 | 5511 |
| 1984 | 11059571 | 3495195 | 600730 | 272613 | 104006 | 97867 | 27983 | 6474 | 5273 |
| 1985 | 16753928 | 2909774 | 971651 | 220348 | 80258 | 28381 | 26169 | 7820 | 5558 |
| 1986 | 16286890 | 5289198 | 822705 | 405365 | 79098 | 25212 | 7010 | 7651 | 5135 |
| 1987 | 14611778 | 4913929 | 1575389 | 302712 | 141616 | 20687 | 6184 | 1910 | 5112 |
| 1988 | 18499272 | 4249433 | 1568370 | 576715 | 96010 | 38018 | 4442 | 1564 | 2786 |
| 1989 | 11786984 | 6023612 | 1043145 | 616829 | 191654 | 28234 | 10743 | 1587 | 3029 |
| 1990 | 11180695 | 3288546 | 1857569 | 399984 | 223926 | 58684 | 7284 | 3756 | 2522 |
| 1991 | 12786166 | 3045136 | 863262 | 728905 | 126358 | 70370 | 19981 | 3110 | 3773 |
| 1992 | 14800462 | 3562073 | 943709 | 335712 | 302623 | 40749 | 23955 | 9882 | 3317 |
| 1993 | 14797146 | 4091612 | 955495 | 383506 | 137332 | 117916 | 14072 | 9637 | 8172 |
| 1994 | 13621525 | 3992641 | 1097287 | 359779 | 133098 | 50226 | 42002 | 5745 | 8007 |
| 1995 | 10768998 | 3507850 | 1113128 | 437195 | 129185 | 44681 | 16247 | 16906 | 7186 |
| 1996 | 8709615 | 2422563 | 937351 | 455851 | 172846 | 47164 | 16229 | 6787 | 14846 |
| 1997 | 12720642 | 1868781 | 603497 | 404737 | 177185 | 70070 | 18047 | 7182 | 11198 |
| 1998 | 19477910 | 2759014 | 481954 | 261445 | 171002 | 72475 | 30368 | 9031 | 10634 |
| 1999 | 19240316 | 4216711 | 714916 | 203232 | 125148 | 74371 | 32696 | 14100 | 10673 |
| 2000 | 15832098 | 3688156 | 1121704 | 295002 | 90312 | 52320 | 31470 | 16121 | 14395 |
| 2001 | 15451801 | 2892151 | 1197129 | 478226 | 126147 | 37104 | 22744 | 14031 | 19170 |
| 2002 | 10257640 | 2727254 | 851198 | 649700 | 232066 | 58667 | 15766 | 11463 | 16063 |
| 2003 | 8740810 | 1523328 | 658513 | 438930 | 336364 | 115839 | 28716 | 7942 | 14809 |
| 2004 | 8589413 | 1232947 | 293982 | 288139 | 227585 | 163872 | 64202 | 16091 | 12193 |
| 2005 | 8095354 | 1244711 | 307369 | 120445 | 143684 | 119633 | 83126 | 34590 | 17269 |
| 2006 | 6526256 | 1190042 | 354017 | 129370 | 59317 | 78523 | 64139 | 42234 | 28278 |
| 2007 | 8366866 | 874098 | 328077 | 158830 | 57791 | 28287 | 39956 | 31940 | 41403 |
| 2008 | 7967157 | 1283988 | 234122 | 147680 | 74346 | 26499 | 13387 | 19818 | 45661 |
| 2009 | 7295363 | 1319994 | 345698 | 97665 | 64020 | 38000 | 12902 | 6586 | 35160 |
| 2010 | 7692156 | 1239754 | 404803 | 141893 | 47137 | 31715 | 17610 | 5628 | 22660 |
| 2011 | 6349484 | 1304780 | 408513 | 186530 | 69351 | 22022 | 13538 | 7123 | 15223 |
| 2012 | 5799137 | 913164 | 419599 | 181436 | 92849 | 34088 | 10347 | 5970 | 14571 |
| 2013 | 8661377 | 728034 | 240286 | 207089 | 92187 | 41502 | 15397 | 4549 | 11766 |
| 2014 | 10224862 | 1247223 | 220397 | 116830 | 107374 | 43167 | 18293 | 7473 | 10677 |
| 2015 | 10375600 | 1430206 | 430119 | 96168 | 58462 | 50680 | 18339 | 8306 | 10777 |
| 2016 | 12288779 | 1434979 | 445252 | 182069 | 45708 | 25561 | 20652 | 8567 | 10617 |
| 2017 | 8652671 | 1916999 | 448619 | 183380 | 75599 | 20383 | 9841 | 9897 | 10617 |
| 2018 | 10771986 | 1218259 | 556457 | 197840 | 81869 | 32242 | 8219 | 4929 | 9411 |
| 2019 | 18276332 | 1807299 | 368865 | 252101 | 95379 | 36351 | 13111 | 4480 | 6805 |
| 2020 | 17708646 | 3849650 | 526635 | 181797 | 123551 | 41694 | 16012 | 6236 | 4925 |
| 2021 | 9934366 | 3749541 | 1376672 | 246275 | 97037 | 57341 | 20866 | 9005 | 5002 |
| 2022 | 11541416 | 1737408 | 1351230 | 724724 | 129883 | 50164 | 29740 | 11908 | 8931 |
| 2023 | 9953736 | 2395907 | 633105 | 722447 | 422782 | 69022 | 25934 | 18592 | 13033 |
| 2024 | 14518705 | 1934717 | 765223 | 343337 | 458029 | 253467 | 36791 | 14964 | 19476 |
| 2025 | 9735209 | 3293800 | 678529 | 383088 | 211252 | 255428 | 148993 | 23775 | 22398 |
| 2026 | 9735209 | 2062294 | 1015740 | 315983 | 236647 | 131295 | 138100 | 91487 | 29392 |