| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 29654133 | 8668633 | 1766934 | 810763 | 231746 | 19819 | 13798 | 4256 | 1998 |
| 1979 | 21021951 | 9590251 | 2234517 | 642418 | 277338 | 72352 | 6278 | 4428 | 2850 |
| 1980 | 11118001 | 6647170 | 2348185 | 779786 | 206040 | 89666 | 21699 | 2231 | 3852 |
| 1981 | 10034652 | 3253308 | 1910643 | 833303 | 237363 | 56570 | 21510 | 6629 | 2905 |
| 1982 | 8529318 | 3027307 | 826385 | 777132 | 272524 | 65023 | 13732 | 5809 | 4248 |
| 1983 | 12274579 | 2475933 | 752815 | 328965 | 302141 | 95292 | 18997 | 4619 | 5594 |
| 1984 | 11255633 | 3784403 | 584462 | 282339 | 105993 | 97711 | 27644 | 6534 | 5393 |
| 1985 | 18705680 | 3245845 | 967869 | 217714 | 84050 | 28389 | 26804 | 7745 | 5674 |
| 1986 | 17199874 | 5992323 | 850934 | 410369 | 79881 | 26153 | 6980 | 7911 | 5343 |
| 1987 | 14823761 | 5292629 | 1546014 | 306520 | 143983 | 20767 | 6481 | 1905 | 5279 |
| 1988 | 19289227 | 4438885 | 1623365 | 563111 | 96679 | 38577 | 4492 | 1599 | 2965 |
| 1989 | 11590273 | 6230408 | 1071631 | 623119 | 191294 | 29337 | 10841 | 1569 | 2941 |
| 1990 | 10889883 | 3406598 | 1940741 | 399489 | 225079 | 61008 | 7349 | 3781 | 2496 |
| 1991 | 12806892 | 3159396 | 882443 | 734005 | 125481 | 72303 | 20868 | 3059 | 3686 |
| 1992 | 14568151 | 3702229 | 926451 | 333922 | 306461 | 41503 | 24202 | 10900 | 3417 |
| 1993 | 14696829 | 4094982 | 946427 | 380526 | 137262 | 121734 | 14411 | 9898 | 8686 |
| 1994 | 13290104 | 3995164 | 1079113 | 356427 | 135403 | 49786 | 44573 | 6086 | 8831 |
| 1995 | 10089865 | 3435136 | 1082967 | 437641 | 128679 | 46107 | 16501 | 18623 | 7877 |
| 1996 | 8311006 | 2336358 | 908759 | 453705 | 175803 | 48213 | 16961 | 6938 | 15014 |
| 1997 | 13221953 | 1825561 | 587312 | 400584 | 178181 | 72301 | 18692 | 7431 | 11554 |
| 1998 | 22739530 | 2842329 | 466151 | 251690 | 168984 | 74470 | 31488 | 9446 | 10869 |
| 1999 | 23390834 | 4693126 | 741825 | 204556 | 123794 | 72141 | 34172 | 14366 | 11337 |
| 2000 | 17482399 | 4324880 | 1212278 | 302989 | 91242 | 52127 | 31298 | 17236 | 15087 |
| 2001 | 15448191 | 3037786 | 1215010 | 484092 | 125881 | 36682 | 22703 | 13745 | 18937 |
| 2002 | 8909271 | 2553615 | 850647 | 636921 | 229769 | 55061 | 14855 | 11106 | 15998 |
| 2003 | 8365989 | 1337184 | 678670 | 438529 | 335730 | 107720 | 26585 | 7080 | 14494 |
| 2004 | 8976063 | 1211295 | 297589 | 290520 | 228201 | 159344 | 62294 | 14743 | 11755 |
| 2005 | 9189817 | 1265462 | 313895 | 123609 | 148406 | 120745 | 82511 | 33625 | 16195 |
| 2006 | 7054278 | 1294714 | 344027 | 133682 | 61729 | 80777 | 67795 | 42000 | 28218 |
| 2007 | 10123443 | 905875 | 333311 | 162878 | 59113 | 30969 | 43080 | 34505 | 41424 |
| 2008 | 10489356 | 1342342 | 247149 | 154964 | 78286 | 27288 | 14601 | 22050 | 44389 |
| 2009 | 10228383 | 1418824 | 355457 | 103685 | 69355 | 39421 | 13911 | 7510 | 37139 |
| 2010 | 9982128 | 1342526 | 418352 | 150260 | 50858 | 34900 | 19223 | 6389 | 24423 |
| 2011 | 6959063 | 1334236 | 430929 | 189505 | 72768 | 25183 | 14854 | 8160 | 16185 |
| 2012 | 6036442 | 903323 | 432290 | 183545 | 94053 | 37820 | 11643 | 6813 | 14463 |
| 2013 | 10109268 | 744431 | 243610 | 218603 | 94512 | 42460 | 17081 | 5278 | 12091 |
| 2014 | 11927738 | 1355814 | 234936 | 122163 | 113293 | 45581 | 18986 | 8459 | 10885 |
| 2015 | 10420394 | 1546000 | 454675 | 99237 | 61156 | 56045 | 20135 | 8823 | 11335 |
| 2016 | 11955574 | 1377714 | 465587 | 189548 | 46980 | 28245 | 23556 | 9667 | 11053 |
| 2017 | 7746554 | 1726363 | 454237 | 184949 | 77906 | 21593 | 11125 | 11049 | 11058 |
| 2018 | 11495115 | 1097137 | 558286 | 198707 | 82089 | 32430 | 8861 | 5424 | 9972 |
| 2019 | 22141997 | 1795569 | 371164 | 254518 | 95980 | 35167 | 13360 | 4732 | 7202 |
| 2020 | 20404995 | 3858425 | 556017 | 187721 | 123548 | 42800 | 15756 | 6347 | 5288 |
| 2021 | 9680923 | 3765510 | 1374893 | 251439 | 98024 | 55983 | 21229 | 9064 | 5429 |
| 2022 | 11897693 | 1661595 | 1330890 | 717351 | 131576 | 49675 | 29291 | 12372 | 9273 |
| 2023 | 8944477 | 2408063 | 629232 | 697485 | 417602 | 68045 | 25508 | 18975 | 13647 |
| 2024 | 14867605 | 1653649 | 806064 | 335280 | 448940 | 242927 | 35120 | 14824 | 20843 |
| 2025 | 14867605 | 2947678 | 590068 | 399923 | 186270 | 253256 | 140101 | 23014 | 25139 |