| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 32142136 | 8036037 | 1757813 | 779464 | 230682 | 19469 | 13390 | 3556 | 1258 |
| 1979 | 20425528 | 9362072 | 2189101 | 608799 | 265445 | 71091 | 6020 | 3940 | 1852 |
| 1980 | 10652984 | 6435623 | 2549920 | 773463 | 193991 | 83114 | 19475 | 1858 | 2447 |
| 1981 | 11238075 | 2924542 | 1999557 | 906559 | 251581 | 57304 | 20610 | 5745 | 1683 |
| 1982 | 8097124 | 2833296 | 732458 | 782427 | 277433 | 69696 | 13760 | 5220 | 2833 |
| 1983 | 11581642 | 2092889 | 649132 | 279627 | 274252 | 86971 | 18195 | 3924 | 3719 |
| 1984 | 9554273 | 3262886 | 516409 | 236764 | 89600 | 87393 | 23168 | 5468 | 3279 |
| 1985 | 17201307 | 2694002 | 877448 | 195264 | 73081 | 24796 | 23493 | 5906 | 3444 |
| 1986 | 14741779 | 5467238 | 741242 | 350248 | 67868 | 22107 | 5879 | 6592 | 3053 |
| 1987 | 13017157 | 4645109 | 1566693 | 275583 | 121362 | 17305 | 5329 | 1444 | 3185 |
| 1988 | 18439751 | 4031296 | 1534522 | 569310 | 92439 | 35766 | 4056 | 1399 | 1711 |
| 1989 | 10503802 | 5963093 | 1056133 | 614794 | 186699 | 26651 | 9697 | 1274 | 1850 |
| 1990 | 9819814 | 3068030 | 1861204 | 401498 | 222126 | 59070 | 6648 | 3253 | 1609 |
| 1991 | 12163169 | 2760620 | 865791 | 756120 | 129785 | 70989 | 19086 | 2413 | 2481 |
| 1992 | 13949350 | 3440393 | 892159 | 335219 | 311018 | 40208 | 21645 | 8738 | 1958 |
| 1993 | 14123351 | 3911397 | 927001 | 371113 | 131998 | 112262 | 12519 | 7559 | 6369 |
| 1994 | 12756001 | 3883245 | 1098948 | 350732 | 128909 | 45539 | 37141 | 4512 | 5527 |
| 1995 | 10164056 | 3276522 | 1100498 | 433746 | 124742 | 41994 | 13981 | 14186 | 4704 |
| 1996 | 7542254 | 2312436 | 914192 | 447512 | 170488 | 44590 | 14772 | 5448 | 10761 |
| 1997 | 10958052 | 1702996 | 592719 | 387784 | 169198 | 65836 | 16044 | 6093 | 7868 |
| 1998 | 17479372 | 2462516 | 445491 | 250267 | 160634 | 66350 | 25854 | 7357 | 7191 |
| 1999 | 17530387 | 3909314 | 659828 | 183985 | 112885 | 65358 | 27857 | 10798 | 7520 |
| 2000 | 13319797 | 3616278 | 1086267 | 272277 | 79458 | 44273 | 25059 | 12860 | 9431 |
| 2001 | 13625448 | 2562866 | 1124973 | 450772 | 116554 | 31965 | 18937 | 10881 | 13579 |
| 2002 | 8578308 | 2320775 | 775401 | 595114 | 210073 | 51108 | 12923 | 9015 | 10969 |
| 2003 | 8644481 | 1275854 | 597273 | 393938 | 300358 | 99615 | 23551 | 6066 | 10440 |
| 2004 | 9185102 | 1213863 | 272631 | 269093 | 203941 | 139932 | 51369 | 12047 | 7867 |
| 2005 | 9316446 | 1248349 | 295512 | 110120 | 130951 | 102738 | 66077 | 26399 | 11655 |
| 2006 | 6731348 | 1260555 | 331678 | 122046 | 53111 | 69555 | 52900 | 31876 | 20153 |
| 2007 | 9644009 | 878218 | 312429 | 151201 | 52866 | 25004 | 35377 | 25762 | 28363 |
| 2008 | 8907657 | 1317127 | 219700 | 138810 | 68332 | 23457 | 11321 | 17855 | 31984 |
| 2009 | 8339873 | 1334836 | 328286 | 90550 | 58425 | 32614 | 10655 | 5402 | 24886 |
| 2010 | 9043473 | 1273767 | 387332 | 132192 | 42430 | 27554 | 14624 | 4600 | 16216 |
| 2011 | 7209851 | 1312547 | 394865 | 176044 | 64979 | 20446 | 12103 | 6247 | 11215 |
| 2012 | 5998811 | 941942 | 404725 | 173299 | 87188 | 31641 | 9273 | 5249 | 11040 |
| 2013 | 10187605 | 729981 | 233099 | 201033 | 85686 | 37518 | 13504 | 4012 | 9159 |
| 2014 | 11151330 | 1358086 | 216314 | 111301 | 100289 | 39401 | 15981 | 6300 | 8140 |
| 2015 | 9902494 | 1484180 | 426889 | 91828 | 55686 | 46663 | 16292 | 6973 | 8668 |
| 2016 | 12240101 | 1379104 | 434701 | 175802 | 43213 | 24178 | 18268 | 7399 | 8430 |
| 2017 | 6945537 | 1797720 | 428355 | 173692 | 71556 | 18525 | 8967 | 8096 | 8312 |
| 2018 | 9689108 | 1033154 | 527958 | 183147 | 75432 | 29042 | 6988 | 4168 | 7227 |
| 2019 | 17732787 | 1704905 | 324700 | 229787 | 84640 | 31318 | 10679 | 3361 | 4701 |
| 2020 | 17510387 | 3648224 | 488384 | 158428 | 107120 | 34999 | 12961 | 4729 | 3281 |
| 2021 | 8948113 | 3599199 | 1254485 | 220179 | 83892 | 48044 | 16607 | 6801 | 3105 |
| 2022 | 13022219 | 1658747 | 1250679 | 652268 | 115191 | 41496 | 23900 | 8944 | 5901 |
| 2023 | 8349130 | 2527458 | 583789 | 644541 | 371621 | 57461 | 20952 | 14078 | 8446 |
| 2024 | 16997686 | 1563796 | 735064 | 300870 | 402467 | 213904 | 29896 | 11652 | 14338 |
| 2025 | 12346895 | 3402302 | 495464 | 357140 | 167417 | 226707 | 122368 | 18457 | 17316 |