| Table 3. Estimated stock numbers at age. | |||||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 1946 | 996363 | 559548 | 460046 | 220924 | 85040 | 88566 | 242864 | 82339 | 35957 | 32252 | 18378 | 7613 | 2116 |
| 1947 | 425175 | 587420 | 440987 | 355636 | 162505 | 55695 | 57530 | 150829 | 44548 | 19400 | 17277 | 9843 | 4808 |
| 1948 | 271600 | 247398 | 432416 | 347541 | 250167 | 89853 | 34004 | 33189 | 68034 | 18982 | 8655 | 7542 | 5520 |
| 1949 | 411422 | 188321 | 203620 | 347147 | 252185 | 130769 | 49458 | 19068 | 14629 | 29251 | 7762 | 3605 | 4150 |
| 1950 | 719048 | 272107 | 163010 | 163440 | 240495 | 131403 | 67763 | 26436 | 7876 | 5857 | 11826 | 2967 | 2230 |
| 1951 | 2143259 | 567433 | 219336 | 139458 | 116563 | 124514 | 69488 | 34605 | 9985 | 2867 | 2088 | 4374 | 1284 |
| 1952 | 2206255 | 1019016 | 345187 | 152470 | 103482 | 59896 | 63295 | 35058 | 12732 | 3767 | 1034 | 731 | 1377 |
| 1953 | 2268745 | 1036784 | 561998 | 216799 | 94364 | 53727 | 29604 | 30498 | 11764 | 4188 | 1211 | 335 | 461 |
| 1954 | 794331 | 1282089 | 621779 | 367675 | 139771 | 50471 | 30679 | 15831 | 12596 | 4769 | 1693 | 484 | 250 |
| 1955 | 380452 | 510088 | 804120 | 399788 | 234910 | 73919 | 28243 | 16986 | 6142 | 5028 | 1887 | 663 | 246 |
| 1956 | 671905 | 238528 | 327175 | 502636 | 234475 | 114823 | 36022 | 14260 | 6434 | 2138 | 1882 | 704 | 309 |
| 1957 | 1243048 | 363581 | 131546 | 194119 | 277906 | 99390 | 50596 | 15962 | 4771 | 2140 | 635 | 610 | 339 |
| 1958 | 1032840 | 629657 | 201049 | 81860 | 114111 | 123428 | 43863 | 23565 | 5827 | 1695 | 773 | 206 | 361 |
| 1959 | 1264212 | 531456 | 352762 | 121701 | 47654 | 53932 | 58159 | 20412 | 9418 | 2322 | 648 | 327 | 251 |
| 1960 | 1405690 | 589838 | 250503 | 198791 | 70078 | 22420 | 25801 | 27072 | 8022 | 3902 | 950 | 257 | 272 |
| 1961 | 1480454 | 659081 | 289578 | 136638 | 113600 | 33696 | 10482 | 12734 | 10584 | 3007 | 1576 | 391 | 220 |
| 1962 | 1215740 | 772504 | 312117 | 148679 | 71537 | 48833 | 14065 | 4216 | 4639 | 3649 | 986 | 555 | 232 |
| 1963 | 769909 | 689445 | 370921 | 151369 | 70898 | 27269 | 19431 | 5278 | 1310 | 1589 | 1216 | 318 | 302 |
| 1964 | 450006 | 354142 | 313442 | 179855 | 70709 | 22932 | 9395 | 6963 | 1510 | 358 | 490 | 387 | 232 |
| 1965 | 799428 | 240893 | 202079 | 184520 | 98824 | 25757 | 8347 | 3416 | 2320 | 469 | 107 | 155 | 239 |
| 1966 | 1577484 | 517829 | 151342 | 129207 | 111766 | 42801 | 10914 | 3416 | 1228 | 894 | 181 | 36 | 150 |
| 1967 | 1067594 | 1093821 | 340839 | 102689 | 81720 | 51195 | 19443 | 4805 | 1348 | 515 | 383 | 79 | 76 |
| 1968 | 192708 | 834790 | 718086 | 234665 | 70199 | 37052 | 22260 | 8203 | 1852 | 510 | 202 | 154 | 74 |
| 1969 | 113484 | 145464 | 545743 | 437765 | 144723 | 32353 | 16016 | 9036 | 3121 | 729 | 207 | 75 | 102 |
| 1970 | 195834 | 88528 | 88126 | 320462 | 241791 | 52042 | 12142 | 5632 | 3073 | 1047 | 256 | 75 | 76 |
| 1971 | 357681 | 138696 | 56270 | 52821 | 178832 | 87233 | 18924 | 4502 | 2027 | 1148 | 411 | 98 | 66 |
| 1972 | 925065 | 276663 | 93500 | 38127 | 33947 | 70587 | 33295 | 7215 | 1730 | 789 | 466 | 175 | 76 |
| 1973 | 1770339 | 659601 | 174188 | 59077 | 23990 | 15115 | 26902 | 11801 | 2265 | 561 | 274 | 160 | 107 |
| 1974 | 712299 | 1290615 | 410296 | 105790 | 35087 | 11249 | 7010 | 10337 | 4074 | 824 | 207 | 111 | 121 |
| 1975 | 616491 | 466942 | 667875 | 224597 | 57512 | 15486 | 5247 | 3266 | 3171 | 1286 | 285 | 67 | 98 |
| 1976 | 622645 | 444942 | 246194 | 337385 | 113884 | 23311 | 6464 | 2372 | 1350 | 1021 | 443 | 99 | 78 |
| 1977 | 421864 | 434102 | 235520 | 126826 | 165133 | 42688 | 8705 | 2471 | 1058 | 609 | 357 | 172 | 80 |
| 1978 | 556621 | 281169 | 198234 | 110675 | 60851 | 54583 | 13765 | 2735 | 819 | 406 | 244 | 114 | 93 |
| 1979 | 184807 | 406239 | 141442 | 88742 | 49936 | 17452 | 15151 | 3652 | 640 | 175 | 101 | 56 | 58 |
| 1980 | 115756 | 138416 | 237337 | 80691 | 44128 | 15613 | 5804 | 4619 | 913 | 160 | 41 | 27 | 29 |
| 1981 | 120568 | 90396 | 86757 | 142027 | 45032 | 13419 | 5099 | 1956 | 1197 | 239 | 44 | 10 | 17 |
| 1982 | 158509 | 106697 | 62314 | 54218 | 80877 | 15077 | 4221 | 1673 | 633 | 349 | 75 | 13 | 9 |
| 1983 | 130616 | 122495 | 71631 | 39593 | 30958 | 24100 | 5083 | 1362 | 640 | 238 | 118 | 29 | 9 |
| 1984 | 341341 | 103405 | 71069 | 42817 | 21299 | 8304 | 5998 | 1346 | 544 | 267 | 99 | 42 | 14 |
| 1985 | 546557 | 293398 | 64404 | 39776 | 22697 | 4910 | 2165 | 1600 | 487 | 215 | 106 | 42 | 19 |
| 1986 | 1124968 | 399660 | 165584 | 35366 | 20671 | 5729 | 1291 | 677 | 687 | 206 | 94 | 47 | 22 |
| 1987 | 341746 | 824458 | 196053 | 74044 | 15470 | 5327 | 1412 | 404 | 250 | 249 | 72 | 37 | 21 |
| 1988 | 255612 | 222510 | 424090 | 92994 | 29326 | 3783 | 1312 | 384 | 141 | 81 | 73 | 24 | 13 |
| 1989 | 141164 | 180831 | 129383 | 247554 | 51851 | 8257 | 1264 | 413 | 140 | 51 | 27 | 23 | 10 |
| 1990 | 125209 | 109146 | 111349 | 88590 | 150424 | 19432 | 2919 | 516 | 160 | 60 | 21 | 11 | 8 |
| 1991 | 284179 | 110294 | 83921 | 82217 | 64197 | 81310 | 9849 | 1385 | 253 | 70 | 32 | 11 | 7 |
| 1992 | 661980 | 246724 | 86782 | 61904 | 55498 | 34194 | 44394 | 5575 | 829 | 140 | 34 | 17 | 7 |
| 1993 | 926140 | 525641 | 197747 | 68372 | 42243 | 27256 | 16259 | 22377 | 2892 | 428 | 74 | 18 | 9 |
| 1994 | 763734 | 742770 | 377781 | 135533 | 45037 | 16869 | 11084 | 6400 | 8804 | 1207 | 168 | 28 | 7 |
| 1995 | 542967 | 520749 | 476303 | 234889 | 74594 | 14250 | 5469 | 3581 | 2300 | 3066 | 396 | 56 | 9 |
| 1996 | 437863 | 306505 | 309148 | 287181 | 130297 | 20406 | 4349 | 1483 | 1112 | 735 | 1032 | 127 | 19 |
| 1997 | 740314 | 228289 | 174559 | 184249 | 161922 | 38988 | 6256 | 1584 | 483 | 366 | 228 | 339 | 46 |
| 1998 | 1029411 | 461300 | 119904 | 94627 | 100047 | 42371 | 9351 | 1557 | 411 | 148 | 93 | 61 | 119 |
| 1999 | 583201 | 592595 | 226023 | 61307 | 44539 | 26620 | 10254 | 2175 | 403 | 125 | 46 | 26 | 66 |
| 2000 | 650927 | 419465 | 332758 | 119343 | 32173 | 11518 | 6685 | 2246 | 648 | 131 | 36 | 14 | 36 |
| 2001 | 524118 | 490408 | 266052 | 182136 | 61768 | 8439 | 3069 | 1582 | 596 | 193 | 37 | 11 | 21 |
| 2002 | 365315 | 393599 | 331555 | 179286 | 102611 | 19537 | 2881 | 1072 | 577 | 207 | 79 | 15 | 13 |
| 2003 | 663705 | 277594 | 271414 | 229057 | 108773 | 34439 | 6573 | 1020 | 463 | 266 | 85 | 39 | 12 |
| 2004 | 225556 | 494696 | 189192 | 175982 | 135401 | 37515 | 11858 | 2193 | 488 | 282 | 140 | 40 | 23 |
| 2005 | 478496 | 160899 | 304476 | 116138 | 101677 | 37497 | 10503 | 3257 | 764 | 228 | 122 | 72 | 30 |
| 2006 | 434004 | 343973 | 106845 | 188134 | 72330 | 32057 | 11731 | 3074 | 1269 | 371 | 89 | 57 | 64 |
| 2007 | 1018218 | 351114 | 216714 | 72717 | 115779 | 28090 | 11581 | 3772 | 1169 | 555 | 149 | 36 | 58 |
| 2008 | 916377 | 844444 | 281522 | 151081 | 54297 | 55816 | 13691 | 4972 | 1468 | 604 | 230 | 72 | 47 |
| 2009 | 485034 | 699485 | 661236 | 227654 | 102263 | 33762 | 31298 | 7824 | 2746 | 859 | 311 | 118 | 70 |
| 2010 | 195107 | 384484 | 603719 | 570840 | 175760 | 63751 | 21469 | 17514 | 4663 | 1775 | 412 | 171 | 117 |
| 2011 | 319564 | 165027 | 345492 | 535713 | 427757 | 93923 | 35182 | 11651 | 8167 | 2311 | 967 | 182 | 173 |
| 2012 | 437363 | 240207 | 138215 | 316595 | 440468 | 248410 | 50562 | 19461 | 6250 | 4449 | 1175 | 519 | 222 |
| 2013 | 458934 | 319691 | 204553 | 132634 | 272693 | 295030 | 153509 | 27821 | 10812 | 3943 | 2270 | 632 | 524 |
| 2014 | 710825 | 336314 | 265051 | 176670 | 110317 | 180950 | 166555 | 74493 | 12874 | 5451 | 1824 | 1185 | 762 |
| 2015 | 402416 | 503741 | 275503 | 218227 | 141112 | 73799 | 114296 | 91360 | 31213 | 6844 | 2422 | 869 | 1237 |
| 2016 | 252641 | 262589 | 363513 | 207288 | 149435 | 78009 | 45162 | 61267 | 38746 | 13540 | 3026 | 1101 | 1298 |
| 2017 | 623558 | 208591 | 194312 | 266370 | 144812 | 78442 | 41272 | 24599 | 22803 | 17707 | 5572 | 1296 | 1390 |
| 2018 | 475356 | 444426 | 171825 | 150001 | 197259 | 79564 | 39598 | 22593 | 10772 | 10110 | 6582 | 2301 | 1515 |
| 2019 | 569075 | 359385 | 352473 | 146651 | 103996 | 109128 | 43153 | 20481 | 8957 | 5093 | 3582 | 2510 | 2096 |
| 2020 | 417735 | 362387 | 246100 | 238053 | 102289 | 55276 | 56615 | 23197 | 9084 | 5025 | 2111 | 1514 | 2484 |
| 2021 | 260124 | 256927 | 240573 | 166975 | 145399 | 45426 | 24576 | 24821 | 9772 | 4083 | 1919 | 836 | 2170 |
| 2022 | 153027 | 174956 | 179518 | 165189 | 119187 | 69859 | 20324 | 10286 | 8682 | 4009 | 1395 | 698 | 1587 |
| 2023 | 190961 | 106395 | 113427 | 118131 | 103895 | 53802 | 30258 | 8267 | 2833 | 2590 | 1094 | 428 | 1344 |
| 2024 | 494457 | 140129 | 71190 | 71568 | 75524 | 46957 | 25902 | 13462 | 2557 | 895 | 896 | 378 | 1200 |