| Table 3. Estimated stock numbers at age. | |||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 1950 | 108875 | 99587 | 74057 | 36851 | 46657 | 16609 | 4895 | 2691 | 1380 | 1455 | 2054 |
| 1951 | 625843 | 55853 | 45192 | 26909 | 12667 | 12381 | 5392 | 1928 | 1004 | 443 | 1085 |
| 1952 | 84046 | 425543 | 32325 | 19097 | 8988 | 4317 | 3835 | 1640 | 737 | 356 | 507 |
| 1953 | 1161623 | 49936 | 209382 | 14418 | 6396 | 2655 | 1336 | 1056 | 536 | 255 | 310 |
| 1954 | 129342 | 884750 | 25715 | 91445 | 6989 | 2341 | 1094 | 550 | 389 | 200 | 229 |
| 1955 | 58000 | 83631 | 622848 | 14510 | 52023 | 3118 | 923 | 455 | 237 | 161 | 169 |
| 1956 | 220172 | 40636 | 55575 | 322782 | 7228 | 17750 | 1447 | 403 | 215 | 113 | 154 |
| 1957 | 59726 | 148142 | 27598 | 35816 | 111222 | 3103 | 6152 | 704 | 168 | 99 | 130 |
| 1958 | 72528 | 39922 | 91851 | 15459 | 20732 | 40279 | 1637 | 2508 | 352 | 84 | 119 |
| 1959 | 380760 | 51438 | 25986 | 39852 | 7324 | 7296 | 14930 | 728 | 902 | 147 | 88 |
| 1960 | 314361 | 264196 | 35644 | 15581 | 16989 | 3470 | 3663 | 6178 | 362 | 370 | 109 |
| 1961 | 142252 | 191290 | 144941 | 17647 | 6947 | 7990 | 1591 | 1506 | 2797 | 157 | 204 |
| 1962 | 289137 | 85624 | 92245 | 59626 | 6750 | 2692 | 3268 | 657 | 609 | 1160 | 139 |
| 1963 | 307721 | 175734 | 37898 | 26509 | 17579 | 2637 | 1081 | 1221 | 272 | 243 | 535 |
| 1964 | 345088 | 197239 | 75448 | 12303 | 7724 | 5831 | 1217 | 437 | 505 | 121 | 344 |
| 1965 | 124722 | 237495 | 114320 | 30311 | 4187 | 2801 | 2265 | 533 | 198 | 217 | 210 |
| 1966 | 306812 | 81969 | 158090 | 61954 | 12371 | 1710 | 1281 | 944 | 271 | 91 | 186 |
| 1967 | 333488 | 198860 | 43396 | 72373 | 24804 | 4870 | 791 | 603 | 450 | 132 | 131 |
| 1968 | 18415 | 245002 | 117427 | 21829 | 36081 | 12481 | 2352 | 410 | 314 | 233 | 137 |
| 1969 | 20226 | 11997 | 140835 | 54977 | 10667 | 15759 | 5748 | 1165 | 197 | 157 | 175 |
| 1970 | 204313 | 12531 | 7509 | 69988 | 25082 | 5893 | 8040 | 3004 | 644 | 106 | 186 |
| 1971 | 109149 | 133319 | 7080 | 4489 | 33287 | 12254 | 3346 | 4534 | 1689 | 371 | 163 |
| 1972 | 1060226 | 80075 | 81700 | 4500 | 3093 | 17508 | 6715 | 2006 | 2767 | 1024 | 315 |
| 1973 | 307520 | 614310 | 46172 | 23261 | 1690 | 1541 | 7612 | 2891 | 920 | 1374 | 608 |
| 1974 | 64833 | 167399 | 250248 | 16511 | 10665 | 877 | 1005 | 4434 | 1670 | 542 | 1215 |
| 1975 | 58595 | 36989 | 89931 | 139772 | 6799 | 4954 | 446 | 558 | 2137 | 811 | 930 |
| 1976 | 59789 | 33610 | 16487 | 44114 | 78898 | 3151 | 2768 | 245 | 331 | 1144 | 964 |
| 1977 | 120513 | 30579 | 13764 | 6427 | 17596 | 30313 | 1286 | 1184 | 102 | 148 | 807 |
| 1978 | 211733 | 54967 | 9685 | 4450 | 2891 | 7722 | 15055 | 628 | 562 | 44 | 429 |
| 1979 | 158019 | 116758 | 23270 | 3238 | 2036 | 1399 | 4087 | 7066 | 336 | 272 | 225 |
| 1980 | 22753 | 101648 | 58336 | 8326 | 1151 | 1045 | 713 | 2158 | 3481 | 174 | 239 |
| 1981 | 10694 | 15996 | 62958 | 26229 | 3461 | 549 | 557 | 379 | 1138 | 1716 | 214 |
| 1982 | 16305 | 7058 | 11131 | 31568 | 10516 | 1718 | 276 | 306 | 217 | 623 | 958 |
| 1983 | 8124 | 11180 | 4739 | 6820 | 13508 | 5581 | 980 | 145 | 177 | 126 | 803 |
| 1984 | 13176 | 4964 | 6660 | 2788 | 3893 | 8772 | 2871 | 575 | 79 | 104 | 517 |
| 1985 | 359715 | 8969 | 2843 | 3592 | 1804 | 2563 | 5335 | 1832 | 367 | 51 | 396 |
| 1986 | 474638 | 278040 | 5210 | 1568 | 1838 | 996 | 1467 | 2779 | 1021 | 204 | 260 |
| 1987 | 90983 | 251358 | 156912 | 2543 | 644 | 787 | 471 | 677 | 1202 | 469 | 208 |
| 1988 | 39336 | 70007 | 135626 | 46596 | 1072 | 230 | 317 | 205 | 301 | 505 | 279 |
| 1989 | 28106 | 25871 | 49092 | 70800 | 12171 | 551 | 94 | 150 | 99 | 144 | 362 |
| 1990 | 36642 | 20631 | 17134 | 26033 | 32573 | 5452 | 355 | 57 | 86 | 56 | 274 |
| 1991 | 109375 | 24715 | 13536 | 14056 | 20091 | 20084 | 3111 | 249 | 39 | 56 | 202 |
| 1992 | 321842 | 83223 | 15878 | 10067 | 10367 | 12504 | 12509 | 1867 | 164 | 25 | 155 |
| 1993 | 818959 | 221183 | 57171 | 10654 | 5899 | 6195 | 7565 | 7184 | 1036 | 100 | 105 |
| 1994 | 391289 | 571016 | 152904 | 31599 | 4699 | 3111 | 3710 | 4699 | 4257 | 584 | 114 |
| 1995 | 99478 | 223750 | 426212 | 77992 | 14671 | 2085 | 1413 | 1843 | 2160 | 2106 | 333 |
| 1996 | 98850 | 61509 | 167457 | 246096 | 32173 | 7175 | 1078 | 700 | 922 | 1082 | 1240 |
| 1997 | 118948 | 55874 | 38066 | 95901 | 103452 | 13869 | 2487 | 489 | 309 | 408 | 1074 |
| 1998 | 63125 | 80735 | 35425 | 18025 | 36959 | 38564 | 5184 | 977 | 208 | 129 | 694 |
| 1999 | 146577 | 48834 | 47576 | 17573 | 8917 | 15680 | 13709 | 1892 | 404 | 92 | 379 |
| 2000 | 82675 | 117739 | 31107 | 21494 | 6929 | 4249 | 6512 | 5356 | 799 | 184 | 225 |
| 2001 | 358633 | 69311 | 92984 | 16895 | 10216 | 3471 | 2550 | 3468 | 2628 | 429 | 231 |
| 2002 | 386817 | 293607 | 52038 | 47593 | 9197 | 5452 | 1861 | 1425 | 1900 | 1377 | 345 |
| 2003 | 336821 | 257777 | 192702 | 34534 | 24615 | 4570 | 3445 | 1203 | 815 | 1073 | 977 |
| 2004 | 256531 | 171271 | 163785 | 111243 | 16361 | 10685 | 2133 | 1640 | 604 | 386 | 1049 |
| 2005 | 355604 | 171491 | 94789 | 110027 | 50539 | 6607 | 5466 | 1134 | 724 | 303 | 773 |
| 2006 | 153899 | 216926 | 109149 | 52215 | 44940 | 20542 | 3191 | 2789 | 552 | 341 | 525 |
| 2007 | 510176 | 121153 | 165286 | 61790 | 26934 | 19035 | 8107 | 1738 | 1459 | 282 | 434 |
| 2008 | 1059062 | 451301 | 96916 | 103417 | 21894 | 14051 | 7071 | 3271 | 882 | 707 | 350 |
| 2009 | 988959 | 699186 | 370815 | 61956 | 40300 | 10247 | 5294 | 3114 | 1442 | 486 | 581 |
| 2010 | 233873 | 662985 | 589084 | 232336 | 32164 | 15041 | 4800 | 2715 | 1593 | 772 | 631 |
| 2011 | 115992 | 190649 | 539524 | 417356 | 122828 | 13938 | 6190 | 2115 | 1333 | 819 | 807 |
| 2012 | 334637 | 72908 | 136268 | 391994 | 264275 | 54680 | 6045 | 2544 | 1023 | 688 | 920 |
| 2013 | 117223 | 199625 | 57572 | 93850 | 272897 | 126618 | 23762 | 3115 | 1388 | 580 | 961 |
| 2014 | 404878 | 73287 | 146444 | 49608 | 86986 | 144363 | 61861 | 10825 | 1841 | 870 | 976 |
| 2015 | 71645 | 280931 | 66049 | 92429 | 40389 | 68274 | 73518 | 25701 | 5331 | 1002 | 1012 |
| 2016 | 206246 | 49724 | 166888 | 45981 | 61951 | 32967 | 49056 | 37847 | 12794 | 2551 | 985 |
| 2017 | 192543 | 174759 | 33542 | 109708 | 28030 | 36322 | 18479 | 21686 | 17863 | 5577 | 1461 |
| 2018 | 355106 | 135156 | 124631 | 24594 | 43456 | 14419 | 17634 | 8778 | 9153 | 8423 | 3092 |
| 2019 | 784066 | 237302 | 87824 | 62515 | 16208 | 17092 | 6798 | 7476 | 3610 | 3803 | 4178 |
| 2020 | 416608 | 504077 | 154493 | 44863 | 21988 | 8259 | 6929 | 3337 | 3134 | 1697 | 3251 |
| 2021 | 155614 | 258185 | 335273 | 65727 | 17736 | 7725 | 3742 | 2791 | 1563 | 1418 | 2123 |
| 2022 | 45290 | 140483 | 180182 | 158666 | 25672 | 6036 | 2780 | 1482 | 1078 | 658 | 1399 |
| 2023 | 172827 | 35495 | 105895 | 111206 | 68220 | 9134 | 2443 | 1153 | 657 | 500 | 923 |
| 2024 | 438025 | 106738 | 29646 | 62165 | 53589 | 27845 | 3555 | 1075 | 515 | 315 | 667 |
| 2025 | 494507 | 278689 | 63352 | 20775 | 34143 | 28194 | 12068 | 1569 | 492 | 245 | 469 |
| 2026 | 286569 | 328266 | 191265 | 32913 | 13425 | 17084 | 14198 | 6010 | 811 | 255 | 370 |