| Table 3. Estimated stock numbers at age. | |||||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 1946 | 1709333 | 724657 | 388043 | 175697 | 81335 | 89029 | 239926 | 90813 | 35475 | 32681 | 18108 | 7647 | 2521 |
| 1947 | 574527 | 893871 | 531728 | 307465 | 135889 | 55253 | 59208 | 142264 | 53935 | 19786 | 18136 | 9927 | 6147 |
| 1948 | 288835 | 334916 | 566635 | 370916 | 214430 | 77574 | 35410 | 30989 | 71353 | 19375 | 8431 | 7085 | 6249 |
| 1949 | 514425 | 226512 | 266967 | 403337 | 242620 | 113319 | 44041 | 17983 | 16457 | 29599 | 7390 | 3185 | 4070 |
| 1950 | 768017 | 342949 | 202374 | 190718 | 228885 | 120544 | 60368 | 22706 | 9132 | 6387 | 12176 | 2589 | 2119 |
| 1951 | 2703110 | 677581 | 281061 | 163768 | 116486 | 118073 | 66824 | 29593 | 10599 | 2999 | 2015 | 4222 | 1078 |
| 1952 | 2476986 | 1200300 | 416871 | 175082 | 106478 | 60274 | 63018 | 32611 | 13882 | 4301 | 1077 | 661 | 1320 |
| 1953 | 3048782 | 1172310 | 651727 | 226362 | 84298 | 54865 | 31611 | 28308 | 12556 | 4100 | 1153 | 303 | 360 |
| 1954 | 872178 | 1632627 | 734805 | 390016 | 131343 | 46775 | 33464 | 17200 | 13724 | 5005 | 1693 | 474 | 226 |
| 1955 | 365777 | 546628 | 1018978 | 446227 | 223690 | 73206 | 29375 | 18085 | 7399 | 5256 | 1898 | 655 | 239 |
| 1956 | 705198 | 233701 | 391523 | 584769 | 219942 | 111734 | 35593 | 14326 | 7332 | 2347 | 1943 | 734 | 306 |
| 1957 | 1386477 | 382451 | 145041 | 208536 | 248642 | 93705 | 48330 | 14673 | 5319 | 2178 | 569 | 607 | 336 |
| 1958 | 1109942 | 723662 | 239302 | 92221 | 103576 | 113979 | 42133 | 22433 | 6044 | 1764 | 730 | 168 | 365 |
| 1959 | 1395604 | 542940 | 430295 | 134729 | 46219 | 49207 | 56148 | 20094 | 9344 | 2276 | 631 | 369 | 263 |
| 1960 | 1598010 | 656418 | 271048 | 210045 | 66950 | 22919 | 24026 | 25915 | 8242 | 3853 | 939 | 262 | 339 |
| 1961 | 1620630 | 745428 | 360424 | 139827 | 104377 | 35640 | 11583 | 12560 | 10490 | 2895 | 1597 | 430 | 242 |
| 1962 | 1273629 | 839242 | 401483 | 171072 | 64230 | 49087 | 15469 | 4561 | 4716 | 3277 | 872 | 576 | 240 |
| 1963 | 753690 | 702016 | 458783 | 167803 | 63680 | 27726 | 20655 | 5556 | 1390 | 1614 | 1169 | 308 | 327 |
| 1964 | 406262 | 370003 | 367807 | 181742 | 55598 | 21381 | 9647 | 6591 | 1391 | 326 | 541 | 443 | 250 |
| 1965 | 846955 | 228138 | 247724 | 203601 | 85190 | 24081 | 8207 | 3127 | 2248 | 402 | 99 | 159 | 267 |
| 1966 | 2105137 | 547557 | 158777 | 144716 | 109384 | 44803 | 11019 | 3163 | 1133 | 904 | 180 | 29 | 142 |
| 1967 | 1402529 | 1400375 | 388423 | 103036 | 81419 | 57352 | 21229 | 4523 | 1248 | 523 | 431 | 85 | 63 |
| 1968 | 176085 | 1089960 | 948432 | 271866 | 70218 | 43178 | 24892 | 7810 | 1656 | 446 | 217 | 170 | 78 |
| 1969 | 95579 | 137079 | 734837 | 515191 | 151608 | 40755 | 19676 | 9044 | 2901 | 695 | 220 | 75 | 111 |
| 1970 | 201656 | 78429 | 88168 | 375410 | 235896 | 62263 | 14694 | 5454 | 2666 | 875 | 270 | 85 | 83 |
| 1971 | 349899 | 141533 | 55871 | 46102 | 175581 | 102186 | 21723 | 4616 | 1740 | 1038 | 424 | 115 | 76 |
| 1972 | 939958 | 285916 | 104227 | 37244 | 27622 | 83828 | 38657 | 7042 | 1711 | 695 | 510 | 215 | 95 |
| 1973 | 2273443 | 689332 | 200143 | 63040 | 21221 | 15582 | 31156 | 10152 | 1829 | 488 | 265 | 171 | 134 |
| 1974 | 672396 | 1499085 | 480970 | 116448 | 34712 | 11370 | 6928 | 10099 | 3604 | 712 | 212 | 129 | 146 |
| 1975 | 595523 | 396993 | 747066 | 244078 | 58310 | 17823 | 5401 | 3066 | 3166 | 1107 | 288 | 60 | 117 |
| 1976 | 702109 | 442228 | 236205 | 335771 | 108326 | 25590 | 7481 | 2340 | 1401 | 919 | 396 | 91 | 97 |
| 1977 | 380236 | 475040 | 268520 | 115440 | 144061 | 44512 | 9268 | 2825 | 1188 | 710 | 320 | 161 | 94 |
| 1978 | 673950 | 243668 | 229122 | 111489 | 47071 | 56037 | 14504 | 2591 | 1001 | 498 | 380 | 96 | 95 |
| 1979 | 185281 | 469871 | 150451 | 90823 | 39415 | 16462 | 16556 | 3203 | 640 | 166 | 117 | 58 | 49 |
| 1980 | 117328 | 140806 | 306657 | 87489 | 39052 | 15728 | 6107 | 4820 | 931 | 151 | 37 | 30 | 22 |
| 1981 | 131280 | 93713 | 101225 | 172627 | 40785 | 14782 | 5591 | 1945 | 1373 | 224 | 46 | 8 | 16 |
| 1982 | 193245 | 120909 | 74069 | 64051 | 80672 | 15383 | 4378 | 1568 | 598 | 368 | 71 | 13 | 9 |
| 1983 | 139297 | 143438 | 86832 | 45706 | 29929 | 27066 | 4889 | 1293 | 577 | 222 | 116 | 31 | 9 |
| 1984 | 359313 | 115607 | 88123 | 50158 | 20909 | 10002 | 6980 | 1428 | 460 | 259 | 106 | 38 | 15 |
| 1985 | 643987 | 327129 | 85889 | 47499 | 20850 | 5371 | 2470 | 1907 | 433 | 161 | 106 | 52 | 19 |
| 1986 | 1146616 | 458620 | 222918 | 47203 | 19835 | 6024 | 1453 | 985 | 810 | 200 | 84 | 56 | 28 |
| 1987 | 354824 | 838781 | 265839 | 100804 | 16480 | 5794 | 1504 | 533 | 312 | 284 | 66 | 45 | 26 |
| 1988 | 283036 | 223568 | 502822 | 117542 | 29549 | 4292 | 1480 | 473 | 142 | 95 | 70 | 25 | 13 |
| 1989 | 170035 | 192457 | 147665 | 267323 | 51311 | 8766 | 1362 | 452 | 122 | 40 | 28 | 21 | 12 |
| 1990 | 148287 | 128695 | 122696 | 93114 | 133817 | 20277 | 2901 | 536 | 144 | 50 | 17 | 11 | 7 |
| 1991 | 338722 | 134975 | 101128 | 86569 | 62410 | 82608 | 10931 | 1461 | 261 | 57 | 28 | 9 | 6 |
| 1992 | 817301 | 301437 | 111003 | 69312 | 51453 | 34718 | 47973 | 6458 | 917 | 170 | 27 | 17 | 7 |
| 1993 | 965288 | 613861 | 248765 | 81167 | 38727 | 25669 | 16231 | 25653 | 3364 | 537 | 91 | 19 | 10 |
| 1994 | 778069 | 782114 | 460567 | 154720 | 44011 | 17478 | 11018 | 6381 | 10383 | 1395 | 187 | 31 | 6 |
| 1995 | 574642 | 546076 | 541450 | 263116 | 64290 | 14220 | 5640 | 3396 | 2026 | 3374 | 389 | 59 | 7 |
| 1996 | 514526 | 330023 | 356966 | 300830 | 114405 | 20576 | 4369 | 1607 | 968 | 559 | 1091 | 127 | 15 |
| 1997 | 825038 | 261450 | 208756 | 196576 | 134049 | 42293 | 6848 | 1688 | 523 | 310 | 185 | 375 | 37 |
| 1998 | 1240247 | 520807 | 151535 | 99503 | 77156 | 44638 | 10494 | 1627 | 336 | 147 | 71 | 50 | 100 |
| 1999 | 614969 | 672889 | 285327 | 68029 | 33722 | 27320 | 12087 | 2532 | 339 | 91 | 59 | 24 | 56 |
| 2000 | 681964 | 444764 | 408060 | 132168 | 26259 | 11576 | 7629 | 2647 | 610 | 104 | 30 | 28 | 33 |
| 2001 | 612718 | 528558 | 312973 | 200027 | 53244 | 9275 | 3280 | 1808 | 602 | 187 | 30 | 14 | 28 |
| 2002 | 399231 | 459671 | 382927 | 193705 | 89304 | 20807 | 3212 | 1093 | 563 | 212 | 81 | 17 | 16 |
| 2003 | 794777 | 315028 | 330985 | 240330 | 92532 | 34329 | 7145 | 1130 | 393 | 262 | 82 | 53 | 14 |
| 2004 | 250566 | 573797 | 232749 | 197100 | 116206 | 38015 | 12820 | 2744 | 488 | 220 | 148 | 45 | 28 |
| 2005 | 534734 | 181022 | 383122 | 136039 | 89204 | 39223 | 11194 | 3798 | 805 | 185 | 95 | 101 | 34 |
| 2006 | 498460 | 394039 | 131465 | 214261 | 65642 | 32912 | 12827 | 3341 | 1280 | 352 | 71 | 65 | 114 |
| 2007 | 1238536 | 405003 | 264041 | 81059 | 106092 | 29194 | 11795 | 3942 | 1137 | 480 | 128 | 33 | 76 |
| 2008 | 1038791 | 984319 | 327594 | 164442 | 51739 | 58236 | 14637 | 5118 | 1633 | 535 | 170 | 73 | 51 |
| 2009 | 569156 | 798811 | 760439 | 248573 | 100614 | 34442 | 32176 | 8039 | 2953 | 950 | 251 | 91 | 72 |
| 2010 | 236514 | 446700 | 676038 | 599901 | 176772 | 67516 | 21683 | 17164 | 5173 | 1885 | 360 | 144 | 101 |
| 2011 | 359564 | 204102 | 394427 | 560463 | 418057 | 98029 | 37008 | 11387 | 8297 | 2103 | 960 | 129 | 136 |
| 2012 | 514441 | 283307 | 166619 | 334213 | 431591 | 257383 | 51790 | 18634 | 5584 | 3910 | 1069 | 559 | 170 |
| 2013 | 535826 | 378163 | 237820 | 145941 | 271546 | 306648 | 161626 | 27041 | 9875 | 2604 | 2026 | 607 | 580 |
| 2014 | 823516 | 399281 | 310686 | 192000 | 113689 | 188376 | 167758 | 73815 | 11760 | 4024 | 1226 | 1135 | 780 |
| 2015 | 471358 | 594439 | 324277 | 238359 | 140071 | 78361 | 112038 | 85525 | 32427 | 5464 | 1743 | 651 | 1168 |
| 2016 | 286534 | 301177 | 425494 | 226335 | 147229 | 81226 | 46794 | 57781 | 37884 | 12129 | 2346 | 875 | 1058 |
| 2017 | 741075 | 242748 | 224679 | 292715 | 145837 | 84311 | 43171 | 24339 | 22725 | 14680 | 4793 | 1089 | 981 |
| 2018 | 573486 | 526315 | 200184 | 162080 | 194533 | 85120 | 42308 | 22184 | 10785 | 7285 | 4893 | 1983 | 944 |
| 2019 | 651674 | 432417 | 414708 | 158918 | 101834 | 116555 | 45854 | 20696 | 8538 | 3619 | 2086 | 1705 | 1235 |
| 2020 | 469294 | 419487 | 291507 | 258215 | 101033 | 59354 | 59963 | 23392 | 9304 | 3462 | 1355 | 906 | 1291 |
| 2021 | 284734 | 287992 | 289734 | 188983 | 142708 | 50597 | 27801 | 24909 | 9338 | 3099 | 1236 | 547 | 998 |
| 2022 | 182583 | 197744 | 213494 | 190096 | 118159 | 75058 | 23199 | 10944 | 7736 | 2575 | 888 | 447 | 592 |
| 2023 | 234965 | 125869 | 136570 | 128328 | 102222 | 59623 | 33089 | 8945 | 2978 | 1600 | 516 | 264 | 469 |
| 2024 | 595451 | 169381 | 92140 | 81633 | 70837 | 50258 | 28787 | 13369 | 2611 | 675 | 401 | 197 | 399 |