| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 1977 | 1261293 | 659954 | 2843285 | 300301 | 231123 | 67132 | 26140 | 32618 | 1147 |
| 1978 | 1136791 | 1082452 | 493854 | 1504683 | 123832 | 92153 | 24658 | 8053 | 12426 |
| 1979 | 1621789 | 907080 | 772750 | 345244 | 835268 | 60891 | 42551 | 11058 | 8956 |
| 1980 | 1293526 | 1245600 | 644128 | 428078 | 201458 | 363926 | 27431 | 16070 | 5270 |
| 1981 | 2286234 | 955436 | 839406 | 396462 | 241022 | 125234 | 156068 | 12681 | 7059 |
| 1982 | 1699103 | 1788887 | 657348 | 465819 | 213973 | 118313 | 64619 | 54963 | 6466 |
| 1983 | 2354860 | 1339591 | 1298939 | 430164 | 241626 | 108523 | 54963 | 28782 | 21243 |
| 1984 | 1356521 | 1882372 | 992256 | 778463 | 217576 | 115211 | 51228 | 22449 | 18450 |
| 1985 | 977506 | 1109398 | 1687096 | 677921 | 383748 | 90167 | 45294 | 15473 | 11058 |
| 1986 | 3716796 | 752554 | 917878 | 1160107 | 369669 | 190640 | 40892 | 14840 | 9227 |
| 1987 | 591454 | 3349227 | 640262 | 637988 | 730376 | 195942 | 96086 | 15818 | 7138 |
| 1988 | 1585260 | 454862 | 2582562 | 559846 | 423076 | 415273 | 90647 | 52397 | 12473 |
| 1989 | 3640512 | 1313211 | 398141 | 2004366 | 416440 | 254091 | 206733 | 35231 | 26167 |
| 1990 | 4356939 | 2974125 | 907390 | 307612 | 1221590 | 237466 | 147552 | 120541 | 35925 |
| 1991 | 4716585 | 3544561 | 2388444 | 617540 | 193551 | 755883 | 131395 | 105247 | 122182 |
| 1992 | 4162089 | 3823629 | 2785279 | 1824653 | 417786 | 118636 | 471235 | 66308 | 132472 |
| 1993 | 3480290 | 3403454 | 3093977 | 1923633 | 1174375 | 267586 | 66408 | 264935 | 101750 |
| 1994 | 4091718 | 2846363 | 2470023 | 2252223 | 1318112 | 764516 | 166638 | 36657 | 209628 |
| 1995 | 5644405 | 3350491 | 2120302 | 1723582 | 1575278 | 871377 | 467599 | 100982 | 143514 |
| 1996 | 2292862 | 4756402 | 2569132 | 1428723 | 1062571 | 928844 | 479509 | 240012 | 124534 |
| 1997 | 3251391 | 1782298 | 3560808 | 1743525 | 951811 | 652895 | 495841 | 230204 | 156777 |
| 1998 | 3658232 | 2636152 | 1237327 | 2029704 | 934339 | 501732 | 335075 | 240207 | 179681 |
| 1999 | 3041121 | 3009140 | 2032972 | 727316 | 1139962 | 492384 | 254087 | 175848 | 207139 |
| 2000 | 7063202 | 2402081 | 2204403 | 1261718 | 421703 | 664796 | 258000 | 127478 | 192201 |
| 2001 | 2976776 | 5940996 | 1781623 | 1251241 | 715923 | 222703 | 343756 | 133441 | 185365 |
| 2002 | 7219317 | 2311576 | 4403327 | 1078119 | 626912 | 345765 | 108230 | 167816 | 152402 |
| 2003 | 1500095 | 6258377 | 1521998 | 2603516 | 577132 | 308486 | 178626 | 55741 | 182136 |
| 2004 | 3974213 | 1179840 | 4990070 | 852366 | 1290920 | 277375 | 154612 | 79511 | 131853 |
| 2005 | 7833354 | 3216122 | 758999 | 2905650 | 456584 | 526562 | 122309 | 67449 | 80222 |
| 2006 | 2671061 | 6654358 | 2291728 | 391480 | 1587349 | 233954 | 230041 | 52817 | 67399 |
| 2007 | 5825943 | 2037209 | 4755364 | 1349768 | 204305 | 898755 | 118984 | 109499 | 65733 |
| 2008 | 3676237 | 4933137 | 1435005 | 2911671 | 650346 | 95300 | 481728 | 47066 | 92194 |
| 2009 | 4078306 | 2942338 | 3622545 | 870741 | 1771422 | 362423 | 54080 | 303771 | 82106 |
| 2010 | 1440662 | 3354413 | 2174457 | 2332936 | 530102 | 999626 | 194107 | 27574 | 226423 |
| 2011 | 5855203 | 1083053 | 2181443 | 1439632 | 1438178 | 389133 | 539309 | 106532 | 157793 |
| 2012 | 6208969 | 4896004 | 776414 | 1413243 | 825721 | 943175 | 203014 | 321448 | 139901 |
| 2013 | 1299325 | 5169594 | 3779651 | 526082 | 859090 | 462421 | 588626 | 119187 | 281922 |
| 2014 | 2966443 | 998348 | 3934390 | 2572219 | 360265 | 535975 | 299830 | 366628 | 259769 |
| 2015 | 5091505 | 2385744 | 768398 | 2795282 | 1688279 | 255127 | 316194 | 193556 | 379172 |
| 2016 | 3530967 | 4133245 | 1611928 | 539441 | 1818157 | 1064205 | 151680 | 176028 | 303846 |
| 2017 | 5933051 | 2821600 | 2967641 | 1069250 | 338846 | 1131410 | 637686 | 80908 | 272227 |
| 2018 | 3078690 | 4926833 | 2096183 | 1958268 | 705888 | 232721 | 703765 | 356629 | 173261 |
| 2019 | 7203008 | 2426874 | 3917095 | 1445637 | 1214879 | 474712 | 163076 | 453307 | 284641 |
| 2020 | 3621184 | 6035511 | 1886006 | 2665548 | 926191 | 712133 | 298222 | 96602 | 427930 |
| 2021 | 3636225 | 2895948 | 4436262 | 1377504 | 1677618 | 589128 | 409764 | 177063 | 290243 |
| 2022 | 8398035 | 2815915 | 1958748 | 2971120 | 1078915 | 953867 | 354494 | 205470 | 260850 |
| 2023 | 1370375 | 6919796 | 1840217 | 1256577 | 1846616 | 701577 | 565630 | 203753 | 302126 |
| 2024 | 1620835 | 1085002 | 4853458 | 1092287 | 809005 | 1175171 | 424278 | 335813 | 312851 |
| 2025 | 2832471 | 1312557 | 767001 | 3594738 | 734254 | 545315 | 805506 | 287875 | 457071 |