| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 29554490 | 8579566 | 1804590 | 805114 | 227920 | 19768 | 13459 | 3994 | 1657 |
| 1979 | 22994686 | 8872982 | 2233495 | 635311 | 275254 | 72481 | 6211 | 4225 | 2364 |
| 1980 | 13904383 | 7163411 | 2469803 | 770945 | 203407 | 87657 | 21587 | 2094 | 3274 |
| 1981 | 13377385 | 3766825 | 2072278 | 885140 | 236917 | 56214 | 21078 | 6141 | 2327 |
| 1982 | 9817074 | 3395885 | 854523 | 798127 | 284336 | 64943 | 13321 | 5417 | 3432 |
| 1983 | 12806497 | 2492049 | 787238 | 329803 | 299994 | 97050 | 18651 | 4314 | 4631 |
| 1984 | 10970435 | 3698458 | 622440 | 285336 | 106937 | 95726 | 27862 | 6118 | 4461 |
| 1985 | 16698392 | 2924501 | 1022853 | 223909 | 84687 | 28541 | 25292 | 7541 | 4739 |
| 1986 | 16262404 | 5215426 | 838658 | 416576 | 80067 | 25703 | 6936 | 7126 | 4401 |
| 1987 | 13463565 | 4925275 | 1554382 | 309754 | 142291 | 20580 | 6064 | 1789 | 4277 |
| 1988 | 18287594 | 3898488 | 1539663 | 564316 | 96294 | 37490 | 4236 | 1425 | 2247 |
| 1989 | 11086495 | 5895430 | 974485 | 592880 | 183009 | 28231 | 10113 | 1422 | 2416 |
| 1990 | 10672327 | 3109561 | 1779844 | 373732 | 211075 | 55618 | 6918 | 3319 | 2002 |
| 1991 | 12326152 | 2927666 | 817884 | 696312 | 116527 | 66049 | 18089 | 2826 | 3069 |
| 1992 | 14490322 | 3452566 | 877929 | 322122 | 287834 | 38086 | 21905 | 8506 | 2730 |
| 1993 | 14379573 | 4013990 | 908315 | 360549 | 129233 | 111889 | 12803 | 8497 | 6732 |
| 1994 | 13314716 | 3878081 | 1049636 | 343223 | 127632 | 46980 | 38450 | 5015 | 6583 |
| 1995 | 10318621 | 3434290 | 1045960 | 416533 | 123927 | 42120 | 14663 | 14570 | 5860 |
| 1996 | 8170693 | 2352983 | 889360 | 427903 | 164245 | 45134 | 14649 | 5795 | 11989 |
| 1997 | 12167263 | 1781694 | 580043 | 378541 | 167588 | 65083 | 16532 | 6186 | 8998 |
| 1998 | 18595981 | 2650431 | 453309 | 247113 | 160755 | 67654 | 27327 | 7930 | 8597 |
| 1999 | 18577876 | 3975331 | 672268 | 191463 | 116057 | 68814 | 29610 | 12342 | 8713 |
| 2000 | 15301360 | 3557750 | 1039519 | 274738 | 83469 | 47426 | 28147 | 13908 | 11775 |
| 2001 | 14987069 | 2805716 | 1133720 | 446334 | 116550 | 33257 | 19549 | 11809 | 15274 |
| 2002 | 9363528 | 2643824 | 825734 | 606682 | 215958 | 53340 | 13752 | 9415 | 12735 |
| 2003 | 8228957 | 1394341 | 647305 | 417810 | 311871 | 106208 | 25376 | 6761 | 11509 |
| 2004 | 8193988 | 1175696 | 282669 | 278891 | 214469 | 150084 | 56901 | 13860 | 9563 |
| 2005 | 7906259 | 1193112 | 302216 | 117173 | 138738 | 112060 | 74858 | 29927 | 13958 |
| 2006 | 6223596 | 1168775 | 349746 | 128518 | 57811 | 73735 | 59200 | 37622 | 23689 |
| 2007 | 8176267 | 844010 | 328290 | 156743 | 56792 | 27210 | 36976 | 28836 | 35421 |
| 2008 | 7951434 | 1247312 | 231751 | 147369 | 73320 | 25979 | 12795 | 17967 | 39405 |
| 2009 | 7281025 | 1316347 | 343871 | 98561 | 65822 | 36326 | 12498 | 6178 | 30791 |
| 2010 | 7651996 | 1241488 | 403138 | 142937 | 46928 | 31395 | 16712 | 5334 | 19499 |
| 2011 | 6119122 | 1289393 | 407639 | 183652 | 67979 | 21622 | 13192 | 6597 | 12826 |
| 2012 | 5443940 | 881148 | 418111 | 179155 | 89294 | 32925 | 9964 | 5679 | 11936 |
| 2013 | 8245724 | 688107 | 238061 | 203098 | 89206 | 39278 | 14609 | 4287 | 9885 |
| 2014 | 9723826 | 1171847 | 208966 | 112388 | 102665 | 41505 | 16969 | 6887 | 8752 |
| 2015 | 9705982 | 1346861 | 399655 | 90634 | 55231 | 47284 | 17057 | 7493 | 8826 |
| 2016 | 11926855 | 1330391 | 413842 | 168249 | 42195 | 23867 | 18663 | 7662 | 8602 |
| 2017 | 8106831 | 1843688 | 410356 | 170943 | 69855 | 18629 | 8882 | 8594 | 8572 |
| 2018 | 10253724 | 1151904 | 530381 | 185292 | 76002 | 29247 | 7321 | 4278 | 7704 |
| 2019 | 17890531 | 1719890 | 350320 | 238783 | 88548 | 32722 | 11647 | 3839 | 5510 |
| 2020 | 17478765 | 3673977 | 504130 | 170128 | 114115 | 37895 | 13835 | 5307 | 3836 |
| 2021 | 9621731 | 3603819 | 1301346 | 232518 | 89873 | 51606 | 18349 | 7527 | 3903 |
| 2022 | 11754465 | 1669817 | 1282607 | 674126 | 121090 | 45781 | 26158 | 10191 | 6951 |
| 2023 | 9004991 | 2363303 | 597911 | 668057 | 392132 | 63229 | 23535 | 16066 | 10347 |
| 2024 | 14527543 | 1610133 | 750970 | 308856 | 417142 | 228511 | 33014 | 13570 | 15891 |
| 2025 | 14527543 | 2933682 | 509743 | 372710 | 174804 | 238896 | 129900 | 20806 | 20201 |