| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1978 | 29110869 | 8629747 | 1813631 | 804729 | 229314 | 19915 | 13842 | 4245 | 1910 |
| 1979 | 22317661 | 8805550 | 2253996 | 639014 | 276639 | 73119 | 6365 | 4468 | 2716 |
| 1980 | 13934830 | 6967864 | 2453572 | 778512 | 205033 | 89167 | 22017 | 2218 | 3756 |
| 1981 | 13117227 | 3720005 | 2052799 | 876334 | 239228 | 57023 | 21654 | 6540 | 2694 |
| 1982 | 9911338 | 3287829 | 836233 | 799949 | 280912 | 65907 | 13759 | 5786 | 3996 |
| 1983 | 12155408 | 2474352 | 747524 | 324270 | 303352 | 96542 | 19121 | 4601 | 5403 |
| 1984 | 11139209 | 3479552 | 602298 | 275459 | 104353 | 98830 | 27970 | 6487 | 5165 |
| 1985 | 16837794 | 2926498 | 965704 | 217795 | 81484 | 28537 | 26439 | 7801 | 5440 |
| 1986 | 16155651 | 5331051 | 829474 | 401017 | 79215 | 25643 | 6990 | 7709 | 4959 |
| 1987 | 14688794 | 4862131 | 1584316 | 306006 | 138692 | 21009 | 6257 | 1897 | 4895 |
| 1988 | 18343027 | 4278730 | 1561321 | 575332 | 96170 | 37776 | 4466 | 1562 | 2616 |
| 1989 | 11761087 | 5977114 | 1042722 | 614037 | 190117 | 28687 | 10672 | 1590 | 2906 |
| 1990 | 10896516 | 3286177 | 1848003 | 399959 | 223857 | 59108 | 7303 | 3715 | 2428 |
| 1991 | 12555149 | 2954169 | 862606 | 728495 | 125026 | 70345 | 20183 | 3126 | 3704 |
| 1992 | 14566871 | 3511717 | 915800 | 336637 | 303772 | 40422 | 23926 | 10073 | 3231 |
| 1993 | 14522956 | 4042464 | 943631 | 377951 | 137240 | 118588 | 14006 | 9622 | 8284 |
| 1994 | 13455715 | 3930788 | 1089910 | 355597 | 132922 | 50106 | 42460 | 5736 | 7888 |
| 1995 | 10705106 | 3478959 | 1097230 | 434325 | 129054 | 44714 | 16160 | 17052 | 6993 |
| 1996 | 8565605 | 2423099 | 927203 | 450542 | 172849 | 47670 | 16217 | 6738 | 14549 |
| 1997 | 12618118 | 1837693 | 604777 | 398296 | 176619 | 70241 | 18140 | 7163 | 10851 |
| 1998 | 19343310 | 2751865 | 473068 | 259041 | 170101 | 72774 | 30312 | 9078 | 10295 |
| 1999 | 18977291 | 4221755 | 712682 | 200909 | 123944 | 74063 | 32895 | 14029 | 10436 |
| 2000 | 15758019 | 3644174 | 1120173 | 294697 | 89998 | 51776 | 31285 | 16241 | 14057 |
| 2001 | 15455343 | 2890655 | 1186564 | 475413 | 127728 | 36312 | 22431 | 13842 | 18671 |
| 2002 | 10254026 | 2744958 | 854835 | 647179 | 230485 | 58713 | 15340 | 11276 | 15376 |
| 2003 | 8730089 | 1531438 | 665009 | 439238 | 335856 | 114666 | 28376 | 7676 | 14021 |
| 2004 | 8544045 | 1236958 | 293579 | 290690 | 227241 | 162926 | 63355 | 15827 | 11420 |
| 2005 | 8096212 | 1243187 | 308706 | 120659 | 144921 | 119711 | 82326 | 34042 | 16616 |
| 2006 | 6514337 | 1197769 | 354019 | 131030 | 59550 | 78978 | 64473 | 41670 | 27487 |
| 2007 | 8329977 | 874078 | 329399 | 160163 | 58391 | 28503 | 40277 | 32010 | 39931 |
| 2008 | 7923699 | 1281795 | 233627 | 150002 | 74969 | 26812 | 13466 | 20003 | 44327 |
| 2009 | 7242612 | 1319271 | 344251 | 98237 | 65672 | 38115 | 13080 | 6660 | 34454 |
| 2010 | 7650071 | 1236579 | 404410 | 142373 | 47510 | 32252 | 17759 | 5711 | 22027 |
| 2011 | 6351987 | 1302724 | 411215 | 187033 | 69255 | 22379 | 13703 | 7187 | 14698 |
| 2012 | 5810596 | 917267 | 421303 | 181157 | 93016 | 34296 | 10490 | 6039 | 13984 |
| 2013 | 8636816 | 728948 | 240049 | 207525 | 92124 | 41501 | 15493 | 4606 | 11553 |
| 2014 | 10216080 | 1247632 | 221617 | 116520 | 106862 | 43283 | 18205 | 7529 | 10476 |
| 2015 | 10265389 | 1430247 | 432730 | 95690 | 58574 | 50041 | 18350 | 8262 | 10708 |
| 2016 | 12128153 | 1416444 | 446272 | 180656 | 45338 | 25508 | 20402 | 8565 | 10469 |
| 2017 | 8533369 | 1892976 | 441813 | 182344 | 74659 | 20139 | 9787 | 9812 | 10514 |
| 2018 | 10763138 | 1193513 | 551031 | 194923 | 80626 | 31791 | 8132 | 4916 | 9380 |
| 2019 | 17979858 | 1809979 | 361982 | 248705 | 93712 | 35483 | 12950 | 4455 | 6707 |
| 2020 | 17552614 | 3772199 | 526514 | 177545 | 121636 | 40882 | 15588 | 6108 | 4714 |
| 2021 | 10084621 | 3685100 | 1344026 | 241586 | 94771 | 55871 | 20462 | 8743 | 4692 |
| 2022 | 12281611 | 1716840 | 1318681 | 697076 | 126603 | 48552 | 29058 | 11630 | 8467 |
| 2023 | 9946407 | 2496357 | 617942 | 688791 | 404612 | 66566 | 25255 | 18226 | 12334 |
| 2024 | 14191412 | 1782162 | 771852 | 320788 | 439250 | 240832 | 35009 | 14622 | 18929 |
| 2025 | 14191412 | 2834162 | 555462 | 384861 | 182367 | 250931 | 139790 | 22308 | 23488 |