| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 29825798 | 8462292 | 1967324 | 824198 | 239703 | 21110 | 14344 | 3278 | 1080 |
| 1979 | 25519439 | 8629122 | 2275030 | 668105 | 279377 | 72300 | 6515 | 3993 | 1513 |
| 1980 | 10787890 | 7786639 | 2406654 | 806086 | 212089 | 88791 | 19966 | 1938 | 1943 |
| 1981 | 8896504 | 2844325 | 2215202 | 869602 | 258553 | 62452 | 21575 | 5497 | 1410 |
| 1982 | 6731410 | 2236957 | 665870 | 789626 | 250603 | 65964 | 13420 | 4725 | 2281 |
| 1983 | 9327837 | 1715168 | 525867 | 236764 | 241181 | 70969 | 15925 | 3417 | 2611 |
| 1984 | 8652931 | 2584204 | 425943 | 188249 | 70464 | 69565 | 17624 | 4179 | 1904 |
| 1985 | 16287901 | 2273037 | 715436 | 161883 | 59498 | 18726 | 16947 | 4014 | 1956 |
| 1986 | 17333181 | 4854794 | 614346 | 289129 | 56281 | 17830 | 4185 | 4399 | 1805 |
| 1987 | 14309284 | 5092105 | 1434153 | 235446 | 106037 | 14483 | 4481 | 1032 | 1816 |
| 1988 | 21378631 | 4047117 | 1589346 | 557404 | 90414 | 34321 | 3737 | 1235 | 1155 |
| 1989 | 12649259 | 6629598 | 1104934 | 656202 | 202685 | 27919 | 9683 | 1174 | 1291 |
| 1990 | 12598847 | 3539266 | 2002619 | 446042 | 254251 | 69881 | 7530 | 3315 | 1169 |
| 1991 | 12856535 | 3514946 | 998620 | 863901 | 150180 | 81911 | 21724 | 2587 | 2057 |
| 1992 | 15965689 | 3530642 | 1067837 | 386014 | 341986 | 44358 | 22168 | 7853 | 1824 |
| 1993 | 15636903 | 4387665 | 971330 | 423700 | 144132 | 116328 | 11920 | 6682 | 4824 |
| 1994 | 14052013 | 4174985 | 1217248 | 368709 | 142941 | 47673 | 36409 | 3717 | 4129 |
| 1995 | 10032840 | 3582901 | 1194564 | 469989 | 129299 | 44875 | 13460 | 12556 | 3741 |
| 1996 | 7397337 | 2282761 | 961971 | 458502 | 172139 | 42843 | 13525 | 4487 | 8042 |
| 1997 | 10440604 | 1640266 | 574679 | 388244 | 165127 | 61326 | 13809 | 4899 | 5739 |
| 1998 | 17618334 | 2277518 | 432062 | 238177 | 153246 | 62091 | 22183 | 5686 | 5136 |
| 1999 | 20100177 | 3752291 | 611450 | 172054 | 102730 | 57416 | 23056 | 8273 | 5183 |
| 2000 | 15097295 | 3982922 | 1053583 | 258375 | 72743 | 40305 | 21808 | 9994 | 6145 |
| 2001 | 13242421 | 2822318 | 1205897 | 451747 | 116927 | 31416 | 17572 | 9505 | 9406 |
| 2002 | 6773698 | 2355984 | 796294 | 616313 | 207683 | 49185 | 11846 | 7523 | 8920 |
| 2003 | 6375672 | 1044221 | 570953 | 385016 | 287138 | 90781 | 20350 | 5148 | 8275 |
| 2004 | 6701162 | 977693 | 236346 | 245508 | 190323 | 128140 | 43232 | 9149 | 5719 |
| 2005 | 6339027 | 1025994 | 249130 | 93051 | 114534 | 87918 | 56517 | 20311 | 7569 |
| 2006 | 4917448 | 966414 | 280768 | 102246 | 43297 | 56922 | 41725 | 25484 | 12944 |
| 2007 | 6934495 | 702255 | 262749 | 126809 | 43869 | 19837 | 28067 | 19434 | 19894 |
| 2008 | 7161389 | 1067402 | 184652 | 115834 | 57919 | 19534 | 9043 | 14139 | 22812 |
| 2009 | 7145045 | 1178257 | 282129 | 76019 | 48772 | 26983 | 8645 | 4317 | 17933 |
| 2010 | 7466332 | 1198804 | 346756 | 115379 | 35405 | 22940 | 12051 | 3797 | 11144 |
| 2011 | 5208227 | 1237940 | 365819 | 158961 | 57498 | 17402 | 10875 | 5478 | 7780 |
| 2012 | 4931816 | 763026 | 380618 | 156778 | 80531 | 28442 | 8110 | 4872 | 7928 |
| 2013 | 8756162 | 671336 | 207519 | 184672 | 78669 | 35115 | 12182 | 3600 | 6442 |
| 2014 | 10047208 | 1317598 | 198612 | 101777 | 91015 | 36140 | 14852 | 5654 | 5684 |
| 2015 | 9759985 | 1436972 | 420691 | 86783 | 51059 | 42282 | 15434 | 6841 | 6119 |
| 2016 | 11406604 | 1414651 | 428328 | 178874 | 41557 | 22768 | 16524 | 6884 | 6458 |
| 2017 | 6956367 | 1803559 | 424155 | 172620 | 73093 | 17856 | 8282 | 7013 | 6854 |
| 2018 | 8903414 | 1056338 | 510396 | 175225 | 72978 | 27124 | 6240 | 3462 | 5575 |
| 2019 | 17963556 | 1534903 | 320881 | 220897 | 75345 | 27781 | 8704 | 2643 | 3704 |
| 2020 | 16868190 | 3618068 | 458284 | 154297 | 100839 | 31360 | 11190 | 3662 | 2247 |
| 2021 | 9468696 | 3391034 | 1244787 | 211372 | 79090 | 44871 | 14282 | 5352 | 2146 |
| 2022 | 10677497 | 1734432 | 1187123 | 633356 | 108993 | 36668 | 20460 | 6873 | 4009 |
| 2023 | 8655772 | 2128269 | 582540 | 618413 | 350384 | 53027 | 17503 | 11339 | 6727 |
| 2024 | 14104465 | 1623208 | 646539 | 284727 | 382548 | 191439 | 25796 | 9211 | 9963 |
| 2025 | 14104465 | 2830198 | 495975 | 324769 | 154946 | 202240 | 100308 | 14735 | 11990 |