| Table 3. Estimated stock numbers at age. | |||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 1950 | 108975 | 99599 | 74061 | 36852 | 46655 | 16609 | 4895 | 2691 | 1380 | 1455 | 2053 |
| 1951 | 626475 | 55877 | 45195 | 26909 | 12667 | 12380 | 5392 | 1927 | 1004 | 443 | 1085 |
| 1952 | 84126 | 425585 | 32329 | 19096 | 8988 | 4317 | 3834 | 1640 | 736 | 356 | 507 |
| 1953 | 1163158 | 49946 | 209395 | 14419 | 6396 | 2655 | 1336 | 1057 | 536 | 254 | 310 |
| 1954 | 129495 | 885043 | 25719 | 91452 | 6989 | 2341 | 1093 | 550 | 389 | 200 | 229 |
| 1955 | 58074 | 83666 | 622875 | 14511 | 52016 | 3118 | 923 | 455 | 237 | 161 | 169 |
| 1956 | 220402 | 40653 | 55585 | 322756 | 7228 | 17748 | 1447 | 403 | 215 | 113 | 154 |
| 1957 | 59800 | 148176 | 27602 | 35816 | 111219 | 3103 | 6152 | 704 | 168 | 99 | 130 |
| 1958 | 72625 | 39939 | 91857 | 15460 | 20729 | 40279 | 1636 | 2508 | 352 | 84 | 119 |
| 1959 | 381171 | 51462 | 25991 | 39855 | 7324 | 7295 | 14930 | 728 | 902 | 147 | 88 |
| 1960 | 314624 | 264249 | 35649 | 15581 | 16991 | 3469 | 3663 | 6179 | 362 | 370 | 108 |
| 1961 | 142377 | 191313 | 144952 | 17648 | 6947 | 7990 | 1591 | 1506 | 2797 | 157 | 204 |
| 1962 | 289382 | 85636 | 92245 | 59624 | 6750 | 2692 | 3268 | 657 | 609 | 1160 | 139 |
| 1963 | 308080 | 175744 | 37899 | 26509 | 17578 | 2636 | 1081 | 1221 | 272 | 243 | 535 |
| 1964 | 345532 | 197308 | 75452 | 12303 | 7723 | 5831 | 1217 | 437 | 505 | 121 | 344 |
| 1965 | 124855 | 237593 | 114335 | 30311 | 4187 | 2802 | 2265 | 533 | 198 | 217 | 210 |
| 1966 | 307137 | 81988 | 158105 | 61952 | 12371 | 1710 | 1281 | 944 | 271 | 91 | 186 |
| 1967 | 333881 | 198912 | 43401 | 72374 | 24803 | 4870 | 791 | 603 | 450 | 132 | 131 |
| 1968 | 18438 | 245054 | 117437 | 21830 | 36079 | 12480 | 2352 | 410 | 314 | 233 | 137 |
| 1969 | 20247 | 12002 | 140845 | 54976 | 10667 | 15758 | 5748 | 1165 | 197 | 157 | 175 |
| 1970 | 204516 | 12535 | 7511 | 69987 | 25082 | 5892 | 8041 | 3004 | 644 | 106 | 186 |
| 1971 | 109298 | 133346 | 7082 | 4490 | 33287 | 12255 | 3346 | 4534 | 1689 | 371 | 163 |
| 1972 | 1061088 | 80107 | 81699 | 4499 | 3092 | 17508 | 6715 | 2006 | 2767 | 1024 | 315 |
| 1973 | 307820 | 614362 | 46172 | 23263 | 1690 | 1541 | 7612 | 2891 | 920 | 1374 | 608 |
| 1974 | 64891 | 167462 | 250292 | 16511 | 10666 | 877 | 1005 | 4434 | 1670 | 542 | 1215 |
| 1975 | 58650 | 36996 | 89946 | 139779 | 6799 | 4955 | 446 | 558 | 2138 | 811 | 930 |
| 1976 | 59825 | 33618 | 16490 | 44116 | 78895 | 3151 | 2768 | 245 | 331 | 1144 | 964 |
| 1977 | 120585 | 30577 | 13765 | 6427 | 17596 | 30314 | 1286 | 1184 | 102 | 148 | 807 |
| 1978 | 211921 | 54975 | 9685 | 4451 | 2891 | 7722 | 15054 | 628 | 562 | 44 | 429 |
| 1979 | 158205 | 116783 | 23270 | 3238 | 2036 | 1398 | 4087 | 7066 | 336 | 272 | 225 |
| 1980 | 22785 | 101682 | 58337 | 8326 | 1151 | 1045 | 713 | 2158 | 3481 | 174 | 239 |
| 1981 | 10708 | 16004 | 62962 | 26227 | 3461 | 549 | 557 | 379 | 1138 | 1716 | 214 |
| 1982 | 16321 | 7062 | 11133 | 31566 | 10516 | 1718 | 276 | 306 | 217 | 623 | 958 |
| 1983 | 8129 | 11181 | 4740 | 6820 | 13509 | 5581 | 980 | 145 | 177 | 126 | 803 |
| 1984 | 13175 | 4963 | 6660 | 2788 | 3893 | 8772 | 2871 | 575 | 79 | 104 | 517 |
| 1985 | 359863 | 8970 | 2843 | 3592 | 1804 | 2562 | 5335 | 1832 | 367 | 51 | 396 |
| 1986 | 479062 | 278093 | 5211 | 1568 | 1838 | 996 | 1467 | 2779 | 1021 | 204 | 260 |
| 1987 | 91041 | 251144 | 156908 | 2543 | 644 | 787 | 471 | 677 | 1202 | 469 | 208 |
| 1988 | 39374 | 70037 | 135597 | 46591 | 1072 | 230 | 317 | 205 | 301 | 505 | 279 |
| 1989 | 28106 | 25876 | 49097 | 70790 | 12171 | 551 | 94 | 150 | 99 | 144 | 362 |
| 1990 | 36550 | 20634 | 17138 | 26037 | 32573 | 5453 | 355 | 57 | 86 | 56 | 274 |
| 1991 | 109392 | 24721 | 13540 | 14057 | 20091 | 20086 | 3111 | 249 | 39 | 56 | 202 |
| 1992 | 322112 | 83243 | 15884 | 10067 | 10367 | 12504 | 12510 | 1867 | 164 | 25 | 155 |
| 1993 | 820866 | 221336 | 57233 | 10655 | 5899 | 6195 | 7565 | 7185 | 1036 | 100 | 105 |
| 1994 | 391874 | 571338 | 152953 | 31601 | 4700 | 3111 | 3710 | 4699 | 4257 | 584 | 114 |
| 1995 | 99788 | 223916 | 426415 | 77999 | 14673 | 2085 | 1413 | 1843 | 2160 | 2106 | 333 |
| 1996 | 98928 | 61480 | 167426 | 246079 | 32174 | 7175 | 1079 | 701 | 922 | 1082 | 1240 |
| 1997 | 119383 | 55872 | 38053 | 95886 | 103434 | 13867 | 2488 | 489 | 309 | 408 | 1074 |
| 1998 | 63142 | 80677 | 35423 | 18027 | 36960 | 38560 | 5184 | 977 | 208 | 129 | 694 |
| 1999 | 146665 | 48831 | 47567 | 17571 | 8918 | 15680 | 13710 | 1892 | 404 | 92 | 379 |
| 2000 | 82738 | 117757 | 31110 | 21494 | 6930 | 4250 | 6513 | 5357 | 799 | 184 | 225 |
| 2001 | 358864 | 69322 | 92990 | 16896 | 10218 | 3472 | 2550 | 3469 | 2629 | 429 | 231 |
| 2002 | 387214 | 293667 | 52046 | 47599 | 9198 | 5453 | 1861 | 1425 | 1900 | 1378 | 345 |
| 2003 | 336975 | 257788 | 192731 | 34536 | 24619 | 4570 | 3445 | 1203 | 815 | 1074 | 977 |
| 2004 | 256950 | 171382 | 163823 | 111262 | 16362 | 10687 | 2134 | 1640 | 604 | 386 | 1050 |
| 2005 | 356172 | 171566 | 94813 | 110058 | 50545 | 6608 | 5467 | 1134 | 724 | 303 | 773 |
| 2006 | 153951 | 216856 | 109126 | 52210 | 44938 | 20543 | 3191 | 2789 | 552 | 341 | 525 |
| 2007 | 510002 | 121128 | 165266 | 61787 | 26933 | 19035 | 8108 | 1738 | 1459 | 282 | 434 |
| 2008 | 1058248 | 451315 | 96907 | 103435 | 21896 | 14048 | 7072 | 3271 | 882 | 707 | 350 |
| 2009 | 988708 | 699320 | 370783 | 61951 | 40303 | 10248 | 5295 | 3115 | 1442 | 486 | 581 |
| 2010 | 233811 | 662958 | 589012 | 232333 | 32173 | 15044 | 4800 | 2715 | 1593 | 772 | 631 |
| 2011 | 115838 | 190419 | 539285 | 417369 | 122872 | 13943 | 6191 | 2116 | 1333 | 819 | 807 |
| 2012 | 334439 | 72947 | 136377 | 392253 | 264407 | 54702 | 6047 | 2545 | 1024 | 688 | 920 |
| 2013 | 117758 | 200113 | 57697 | 93933 | 273035 | 126674 | 23771 | 3117 | 1389 | 580 | 961 |
| 2014 | 405397 | 73302 | 146474 | 49621 | 87017 | 144407 | 61877 | 10829 | 1841 | 870 | 976 |
| 2015 | 71800 | 281444 | 66070 | 92443 | 40396 | 68286 | 73527 | 25707 | 5333 | 1002 | 1012 |
| 2016 | 206504 | 49731 | 166886 | 45992 | 61953 | 32968 | 49053 | 37849 | 12796 | 2552 | 986 |
| 2017 | 192727 | 174811 | 33585 | 109746 | 28026 | 36321 | 18478 | 21686 | 17864 | 5578 | 1461 |
| 2018 | 355486 | 135162 | 124613 | 24584 | 43446 | 14418 | 17633 | 8777 | 9153 | 8423 | 3093 |
| 2019 | 785071 | 237341 | 87821 | 62511 | 16204 | 17091 | 6798 | 7476 | 3610 | 3803 | 4178 |
| 2020 | 417380 | 504611 | 154540 | 44865 | 21988 | 8258 | 6929 | 3336 | 3134 | 1697 | 3251 |
| 2021 | 155698 | 258114 | 335157 | 65715 | 17734 | 7725 | 3741 | 2791 | 1563 | 1418 | 2123 |
| 2022 | 45362 | 140507 | 180186 | 158663 | 25668 | 6035 | 2780 | 1482 | 1078 | 657 | 1399 |
| 2023 | 172971 | 35491 | 105900 | 111212 | 68224 | 9134 | 2443 | 1153 | 657 | 501 | 923 |
| 2024 | 438542 | 106760 | 29648 | 62168 | 53594 | 27846 | 3556 | 1076 | 515 | 315 | 667 |
| 2025 | 494847 | 278704 | 63352 | 20775 | 34143 | 28195 | 12070 | 1569 | 492 | 245 | 469 |
| 2026 | 286795 | 328338 | 191294 | 32917 | 13422 | 17084 | 14200 | 6011 | 811 | 255 | 370 |