| Table 3. Estimated stock numbers at age. | |||||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 1946 | 725665 | 595747 | 364043 | 172534 | 78410 | 84747 | 226708 | 81059 | 35465 | 29063 | 19336 | 8190 | 1910 |
| 1947 | 380494 | 581392 | 485862 | 299457 | 134204 | 53796 | 56627 | 132396 | 46117 | 17021 | 13635 | 8442 | 4246 |
| 1948 | 309615 | 306743 | 450289 | 347177 | 207339 | 75614 | 35098 | 30100 | 69089 | 18520 | 7366 | 5642 | 4746 |
| 1949 | 458225 | 267788 | 263135 | 354109 | 229489 | 103887 | 43094 | 16943 | 16115 | 27779 | 7448 | 2899 | 3411 |
| 1950 | 709332 | 367769 | 228816 | 189177 | 208128 | 114702 | 56924 | 22954 | 8685 | 6196 | 10735 | 2774 | 1884 |
| 1951 | 1204385 | 608052 | 298462 | 178077 | 115573 | 110799 | 65898 | 28114 | 11021 | 2990 | 2129 | 3925 | 1242 |
| 1952 | 1241323 | 935268 | 438769 | 190064 | 116207 | 62163 | 60818 | 33152 | 13041 | 4289 | 1029 | 752 | 1322 |
| 1953 | 1560016 | 984615 | 627465 | 243525 | 90814 | 60098 | 33388 | 28291 | 13849 | 4469 | 1384 | 362 | 524 |
| 1954 | 619752 | 1255426 | 700102 | 389599 | 137432 | 49022 | 34684 | 17519 | 12761 | 4996 | 1617 | 507 | 263 |
| 1955 | 264482 | 498335 | 894248 | 435151 | 224580 | 74912 | 30720 | 18142 | 7092 | 4601 | 1802 | 602 | 250 |
| 1956 | 428426 | 207996 | 381962 | 546405 | 212055 | 112817 | 35502 | 14674 | 7023 | 2370 | 1607 | 675 | 295 |
| 1957 | 741894 | 338880 | 145435 | 207962 | 236601 | 94868 | 48869 | 15282 | 5729 | 2360 | 713 | 584 | 354 |
| 1958 | 528290 | 616256 | 246226 | 96215 | 100129 | 108814 | 40968 | 23112 | 6360 | 1939 | 786 | 252 | 367 |
| 1959 | 672814 | 392862 | 412995 | 142229 | 47289 | 47563 | 54690 | 20270 | 9394 | 2262 | 657 | 315 | 263 |
| 1960 | 783074 | 523093 | 242843 | 207698 | 69733 | 23152 | 22953 | 25274 | 8126 | 3569 | 841 | 261 | 249 |
| 1961 | 894556 | 607399 | 340493 | 134131 | 102648 | 36452 | 11415 | 12045 | 9788 | 2837 | 1327 | 344 | 205 |
| 1962 | 730206 | 697458 | 382796 | 169425 | 64418 | 49248 | 15649 | 4613 | 4400 | 3269 | 969 | 519 | 214 |
| 1963 | 460512 | 558577 | 434431 | 165368 | 62745 | 28863 | 20726 | 5750 | 1360 | 1469 | 1156 | 362 | 289 |
| 1964 | 297236 | 366528 | 359055 | 177896 | 54426 | 21452 | 10549 | 6871 | 1501 | 366 | 516 | 429 | 256 |
| 1965 | 673099 | 233888 | 259966 | 200505 | 82766 | 23675 | 8136 | 3204 | 2354 | 442 | 132 | 177 | 266 |
| 1966 | 1546361 | 538904 | 165841 | 146505 | 106501 | 44040 | 10950 | 3021 | 1176 | 875 | 187 | 44 | 169 |
| 1967 | 1201015 | 1241548 | 394729 | 106824 | 81154 | 55409 | 20410 | 4390 | 1120 | 490 | 375 | 70 | 86 |
| 1968 | 175455 | 998579 | 885520 | 280670 | 72837 | 42487 | 23726 | 7264 | 1624 | 411 | 204 | 140 | 69 |
| 1969 | 107289 | 135489 | 697351 | 493867 | 154894 | 41340 | 19747 | 8545 | 2616 | 653 | 186 | 74 | 91 |
| 1970 | 189089 | 83866 | 86842 | 366722 | 237498 | 64327 | 15127 | 5829 | 2744 | 897 | 280 | 71 | 72 |
| 1971 | 374184 | 145912 | 57771 | 45117 | 173546 | 103049 | 22496 | 4581 | 1859 | 1014 | 415 | 110 | 61 |
| 1972 | 944744 | 304467 | 105467 | 37360 | 27137 | 81643 | 36095 | 6963 | 1530 | 693 | 454 | 169 | 74 |
| 1973 | 1634607 | 759724 | 213319 | 64443 | 21199 | 15767 | 32480 | 9715 | 1966 | 499 | 294 | 172 | 103 |
| 1974 | 558982 | 1165016 | 518526 | 123579 | 35646 | 11268 | 6514 | 10227 | 3420 | 693 | 206 | 112 | 116 |
| 1975 | 589701 | 367461 | 658504 | 258981 | 61768 | 18610 | 5309 | 2985 | 3346 | 1124 | 277 | 67 | 94 |
| 1976 | 571496 | 443855 | 227474 | 309152 | 108453 | 26067 | 7577 | 2212 | 1220 | 1015 | 417 | 86 | 68 |
| 1977 | 355575 | 400628 | 272848 | 113021 | 136618 | 43295 | 8844 | 2676 | 995 | 468 | 348 | 129 | 59 |
| 1978 | 602691 | 247649 | 215675 | 112160 | 47552 | 55757 | 14032 | 2249 | 927 | 349 | 169 | 94 | 60 |
| 1979 | 205416 | 447271 | 155720 | 90009 | 40632 | 17574 | 18434 | 3258 | 700 | 198 | 95 | 39 | 40 |
| 1980 | 131865 | 158803 | 302237 | 87392 | 39104 | 16076 | 6512 | 5079 | 980 | 156 | 53 | 22 | 16 |
| 1981 | 143331 | 103616 | 114696 | 175232 | 38067 | 15658 | 6037 | 2060 | 1416 | 231 | 48 | 13 | 8 |
| 1982 | 178203 | 124474 | 84007 | 64557 | 82285 | 15213 | 4621 | 1510 | 629 | 390 | 75 | 14 | 7 |
| 1983 | 136494 | 134431 | 91899 | 52002 | 29029 | 28368 | 4891 | 1221 | 563 | 222 | 123 | 26 | 7 |
| 1984 | 423198 | 112616 | 82223 | 53870 | 24760 | 10686 | 7748 | 1352 | 427 | 238 | 89 | 45 | 10 |
| 1985 | 489173 | 370745 | 80812 | 44838 | 24383 | 6351 | 2770 | 1918 | 435 | 158 | 97 | 39 | 17 |
| 1986 | 1194853 | 381638 | 234051 | 45464 | 19069 | 7428 | 1584 | 975 | 763 | 172 | 67 | 46 | 17 |
| 1987 | 319091 | 948537 | 248171 | 106671 | 16399 | 6842 | 1762 | 557 | 259 | 253 | 56 | 33 | 18 |
| 1988 | 306915 | 230644 | 574622 | 117647 | 33037 | 4975 | 1729 | 602 | 120 | 68 | 62 | 27 | 12 |
| 1989 | 150392 | 220929 | 145842 | 301523 | 54361 | 9742 | 1446 | 475 | 104 | 30 | 14 | 28 | 10 |
| 1990 | 126203 | 126725 | 128819 | 95092 | 142834 | 22453 | 2804 | 506 | 129 | 33 | 8 | 7 | 7 |
| 1991 | 281910 | 124069 | 97000 | 86003 | 61763 | 82387 | 11182 | 1301 | 226 | 48 | 11 | 4 | 3 |
| 1992 | 655513 | 262111 | 99518 | 68749 | 48942 | 33950 | 46566 | 5818 | 733 | 113 | 19 | 6 | 1 |
| 1993 | 852602 | 475104 | 234433 | 71912 | 36554 | 23615 | 15514 | 23922 | 2808 | 372 | 39 | 10 | 1 |
| 1994 | 577813 | 659023 | 379956 | 142835 | 38657 | 15855 | 10682 | 6375 | 9722 | 1150 | 109 | 15 | 2 |
| 1995 | 365376 | 426824 | 495149 | 225371 | 62408 | 12277 | 5229 | 3421 | 2203 | 3209 | 291 | 35 | 2 |
| 1996 | 283609 | 268807 | 319080 | 275505 | 102577 | 19592 | 4229 | 1518 | 1116 | 624 | 968 | 79 | 2 |
| 1997 | 595590 | 192379 | 197271 | 179272 | 119226 | 37326 | 6226 | 1634 | 385 | 345 | 191 | 299 | 7 |
| 1998 | 821029 | 437993 | 122716 | 94733 | 70690 | 41627 | 9381 | 1598 | 345 | 103 | 94 | 58 | 69 |
| 1999 | 558422 | 576863 | 256153 | 61138 | 33012 | 26103 | 11590 | 2481 | 327 | 94 | 28 | 29 | 41 |
| 2000 | 676633 | 396324 | 364645 | 120328 | 24343 | 11214 | 7380 | 2609 | 555 | 101 | 28 | 9 | 27 |
| 2001 | 539328 | 516682 | 286556 | 182361 | 51940 | 8952 | 3367 | 1895 | 644 | 188 | 29 | 11 | 14 |
| 2002 | 334911 | 415583 | 363253 | 183429 | 82341 | 20299 | 3060 | 1154 | 530 | 242 | 69 | 13 | 9 |
| 2003 | 689647 | 281586 | 283806 | 232685 | 84390 | 30177 | 6681 | 1102 | 421 | 240 | 91 | 36 | 7 |
| 2004 | 217664 | 556655 | 211605 | 180879 | 115783 | 33890 | 10877 | 2586 | 452 | 209 | 109 | 48 | 18 |
| 2005 | 598496 | 178308 | 397826 | 134806 | 93662 | 38997 | 11135 | 3863 | 779 | 194 | 87 | 63 | 30 |
| 2006 | 498816 | 447404 | 138549 | 228880 | 68131 | 33691 | 13355 | 3259 | 1250 | 336 | 73 | 50 | 47 |
| 2007 | 1125277 | 421960 | 291887 | 87528 | 118894 | 30124 | 12299 | 4322 | 1104 | 520 | 126 | 39 | 44 |
| 2008 | 902951 | 935472 | 329006 | 163607 | 52802 | 62136 | 15154 | 5469 | 1838 | 484 | 195 | 68 | 39 |
| 2009 | 511647 | 758394 | 727815 | 245653 | 89038 | 33269 | 28480 | 7544 | 2856 | 869 | 194 | 102 | 54 |
| 2010 | 171095 | 430602 | 632329 | 543448 | 165005 | 54121 | 18627 | 14247 | 4371 | 1449 | 315 | 99 | 83 |
| 2011 | 278860 | 164445 | 370689 | 524752 | 383141 | 85245 | 30943 | 10385 | 7713 | 1864 | 638 | 144 | 99 |
| 2012 | 412503 | 256905 | 145521 | 311856 | 401168 | 217863 | 44050 | 15600 | 4994 | 3573 | 890 | 311 | 138 |
| 2013 | 371630 | 353177 | 225075 | 128524 | 239256 | 262273 | 133010 | 22509 | 8085 | 2299 | 1799 | 434 | 267 |
| 2014 | 682796 | 327968 | 292385 | 181936 | 101170 | 167559 | 144087 | 63329 | 10653 | 3616 | 1123 | 880 | 396 |
| 2015 | 370059 | 531325 | 293382 | 213672 | 131237 | 67597 | 95010 | 72552 | 28790 | 4858 | 1681 | 529 | 693 |
| 2016 | 257382 | 299153 | 404171 | 215018 | 135854 | 76213 | 43153 | 52190 | 33207 | 10886 | 2116 | 756 | 633 |
| 2017 | 614525 | 223922 | 223876 | 288822 | 145409 | 79034 | 40802 | 23791 | 22318 | 12162 | 4515 | 892 | 662 |
| 2018 | 426443 | 510322 | 182815 | 157692 | 185066 | 85040 | 39706 | 21290 | 10528 | 7235 | 4633 | 1740 | 680 |
| 2019 | 524138 | 342410 | 372690 | 146512 | 90551 | 106774 | 45032 | 19093 | 8735 | 3602 | 2502 | 1592 | 971 |
| 2020 | 403410 | 388091 | 266417 | 243142 | 98751 | 53211 | 53584 | 21611 | 7766 | 3081 | 1229 | 799 | 966 |
| 2021 | 293403 | 316263 | 298558 | 188830 | 143415 | 52197 | 25980 | 22703 | 8137 | 2536 | 1002 | 342 | 608 |
| 2022 | 166032 | 238199 | 237849 | 192971 | 118150 | 71706 | 22863 | 9694 | 6549 | 2462 | 689 | 227 | 270 |
| 2023 | 202394 | 136696 | 159585 | 138474 | 105819 | 60049 | 31208 | 8430 | 2655 | 1684 | 546 | 113 | 123 |
| 2024 | 483284 | 165906 | 103082 | 93667 | 77488 | 48194 | 28013 | 10267 | 2218 | 641 | 392 | 84 | 50 |
| 2025 | 302761 | 365527 | 127854 | 64699 | 50452 | 37213 | 20641 | 9989 | 2909 | 683 | 179 | 69 | 32 |
| 2026 | 103212 | 243079 | 280533 | 88993 | 40359 | 26183 | 17316 | 7877 | 3135 | 909 | 203 | 33 | 27 |