| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 28026774 | 8740361 | 1821454 | 800953 | 228477 | 19698 | 13835 | 4169 | 1796 |
| 1979 | 25094790 | 8298730 | 2256083 | 643692 | 276479 | 72111 | 6339 | 4349 | 2574 |
| 1980 | 14458893 | 7920808 | 2331921 | 785943 | 208115 | 90822 | 21804 | 2228 | 3554 |
| 1981 | 13143373 | 3937693 | 2200693 | 831202 | 236303 | 56655 | 21342 | 6435 | 2521 |
| 1982 | 9610220 | 3333758 | 882594 | 836542 | 267241 | 64407 | 13502 | 5492 | 3731 |
| 1983 | 13123742 | 2448469 | 786955 | 338827 | 314597 | 92294 | 18598 | 4454 | 5023 |
| 1984 | 10943419 | 3820187 | 625169 | 292504 | 109593 | 102157 | 26824 | 6324 | 4869 |
| 1985 | 15989884 | 2941132 | 1067125 | 230324 | 86992 | 28705 | 27149 | 7392 | 5079 |
| 1986 | 17108552 | 4939536 | 847225 | 432888 | 83120 | 26155 | 6805 | 7739 | 4599 |
| 1987 | 12458127 | 5268587 | 1521420 | 312279 | 149134 | 21157 | 6423 | 1835 | 4582 |
| 1988 | 18495501 | 3554547 | 1577656 | 552719 | 94690 | 37546 | 4337 | 1501 | 2390 |
| 1989 | 10828873 | 5993436 | 933168 | 600502 | 187956 | 28071 | 10254 | 1487 | 2600 |
| 1990 | 11179216 | 3025031 | 1764521 | 360329 | 211586 | 58502 | 6594 | 3332 | 2185 |
| 1991 | 12190180 | 3107551 | 802285 | 687505 | 113726 | 66071 | 19027 | 2742 | 3230 |
| 1992 | 14638694 | 3394672 | 898449 | 319199 | 288056 | 37134 | 21555 | 9315 | 2774 |
| 1993 | 14576107 | 4062119 | 896694 | 367588 | 130904 | 115126 | 12733 | 8306 | 7446 |
| 1994 | 13474377 | 3934515 | 1052343 | 336204 | 129367 | 47591 | 41444 | 5068 | 6854 |
| 1995 | 10425170 | 3476895 | 1050621 | 414396 | 121402 | 42548 | 15009 | 15896 | 6031 |
| 1996 | 8228010 | 2387254 | 895844 | 428015 | 165190 | 44799 | 15108 | 5973 | 12749 |
| 1997 | 12082895 | 1810050 | 583783 | 381774 | 169672 | 66180 | 16618 | 6415 | 9583 |
| 1998 | 18159151 | 2633874 | 459982 | 248472 | 162651 | 69896 | 27976 | 8168 | 9115 |
| 1999 | 19543287 | 3833950 | 675049 | 195330 | 118887 | 70396 | 31372 | 12594 | 9233 |
| 2000 | 15984025 | 3774993 | 1027319 | 276931 | 85165 | 49746 | 29258 | 15284 | 12269 |
| 2001 | 15560952 | 2943185 | 1162278 | 441730 | 115719 | 33863 | 20713 | 12293 | 16056 |
| 2002 | 8828387 | 2760581 | 848082 | 620008 | 218531 | 53020 | 13802 | 10162 | 13273 |
| 2003 | 8137711 | 1295332 | 659391 | 427558 | 318877 | 108862 | 25288 | 6753 | 12621 |
| 2004 | 8300152 | 1167823 | 278932 | 284759 | 221335 | 155063 | 59752 | 14028 | 10100 |
| 2005 | 7784230 | 1215601 | 304793 | 116938 | 142616 | 116071 | 76243 | 31499 | 14804 |
| 2006 | 6156241 | 1142336 | 357638 | 131151 | 58090 | 77245 | 62587 | 37913 | 25183 |
| 2007 | 8129752 | 836686 | 329964 | 160635 | 57964 | 27353 | 39332 | 30492 | 35904 |
| 2008 | 8015279 | 1230421 | 232562 | 148791 | 75425 | 26639 | 12805 | 19371 | 41094 |
| 2009 | 7531704 | 1320406 | 346656 | 99174 | 66543 | 37393 | 12963 | 6396 | 32383 |
| 2010 | 7927126 | 1285717 | 407538 | 145244 | 46988 | 31508 | 17537 | 5559 | 20248 |
| 2011 | 5863428 | 1339377 | 411944 | 185387 | 68765 | 21413 | 13068 | 6873 | 13327 |
| 2012 | 5443897 | 831311 | 427285 | 179275 | 90528 | 33620 | 9966 | 5657 | 12841 |
| 2013 | 8320296 | 693957 | 235600 | 207016 | 90164 | 40443 | 14841 | 4277 | 10581 |
| 2014 | 9768842 | 1179284 | 210538 | 112742 | 104408 | 42074 | 17202 | 7078 | 9440 |
| 2015 | 9896747 | 1342630 | 402485 | 90770 | 55262 | 48377 | 17410 | 7589 | 9578 |
| 2016 | 12350954 | 1359045 | 415935 | 171650 | 42368 | 24264 | 19301 | 7923 | 9151 |
| 2017 | 8300080 | 1911849 | 414646 | 171182 | 71591 | 18538 | 9078 | 9027 | 9096 |
| 2018 | 9974290 | 1197532 | 541728 | 186281 | 77175 | 29863 | 7407 | 4464 | 8282 |
| 2019 | 18230449 | 1659032 | 360715 | 244315 | 89064 | 33363 | 12071 | 4038 | 5870 |
| 2020 | 17514982 | 3732966 | 500777 | 174593 | 116917 | 38882 | 14400 | 5485 | 4079 |
| 2021 | 10033340 | 3576896 | 1313152 | 233919 | 90939 | 53348 | 19261 | 7930 | 4051 |
| 2022 | 11366188 | 1779803 | 1278778 | 678088 | 122514 | 46291 | 27371 | 10713 | 7346 |
| 2023 | 9093969 | 2259909 | 621816 | 670047 | 394270 | 63349 | 23914 | 17148 | 10883 |
| 2024 | 15043993 | 1651395 | 741198 | 316297 | 425328 | 232681 | 32785 | 13575 | 17249 |
| 2025 | 15043993 | 3062257 | 526271 | 372339 | 178317 | 242542 | 132302 | 20702 | 21313 |