| Table 3. Estimated stock numbers at age. | |||||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 1946 | 1118933 | 685504 | 375284 | 171522 | 77337 | 85248 | 227031 | 86635 | 34554 | 31579 | 17374 | 7698 | 2497 |
| 1947 | 602411 | 669149 | 506873 | 307141 | 135848 | 53852 | 57507 | 135602 | 51415 | 18294 | 16648 | 8603 | 5528 |
| 1948 | 451392 | 346279 | 457516 | 344797 | 213092 | 75760 | 35678 | 30849 | 70569 | 19213 | 8385 | 6823 | 5801 |
| 1949 | 651144 | 291868 | 271009 | 361788 | 230336 | 105552 | 42771 | 17537 | 16697 | 29356 | 7759 | 3209 | 3972 |
| 1950 | 1027122 | 412463 | 230312 | 189375 | 207996 | 113876 | 57794 | 22584 | 9146 | 6370 | 12206 | 2768 | 2063 |
| 1951 | 2338313 | 779823 | 324346 | 179727 | 115758 | 112091 | 65470 | 28728 | 10660 | 3055 | 2134 | 4479 | 1149 |
| 1952 | 2337080 | 1092506 | 466557 | 197430 | 119455 | 62517 | 61917 | 32729 | 13519 | 4233 | 1057 | 736 | 1305 |
| 1953 | 2406523 | 1122628 | 613765 | 239046 | 90486 | 60713 | 33467 | 28890 | 13402 | 4551 | 1307 | 365 | 445 |
| 1954 | 865223 | 1383237 | 716623 | 378383 | 137099 | 48698 | 34875 | 17527 | 13252 | 4995 | 1705 | 493 | 235 |
| 1955 | 379187 | 575948 | 923635 | 443767 | 225921 | 75948 | 30643 | 18213 | 7128 | 4930 | 1869 | 646 | 233 |
| 1956 | 760569 | 242134 | 415424 | 566630 | 215813 | 114397 | 35928 | 14681 | 7100 | 2328 | 1817 | 713 | 302 |
| 1957 | 1441326 | 413291 | 147416 | 208520 | 236054 | 95837 | 49021 | 15549 | 5763 | 2344 | 671 | 637 | 366 |
| 1958 | 906995 | 722330 | 253275 | 96181 | 100951 | 108286 | 41126 | 23169 | 6459 | 1927 | 764 | 225 | 396 |
| 1959 | 1338303 | 472574 | 436851 | 142099 | 47260 | 47984 | 55227 | 20348 | 9370 | 2330 | 640 | 320 | 275 |
| 1960 | 1514996 | 639833 | 244197 | 204821 | 69443 | 23087 | 23199 | 25508 | 8154 | 3751 | 884 | 260 | 268 |
| 1961 | 1565340 | 726303 | 358253 | 132433 | 102542 | 36498 | 11304 | 12178 | 9962 | 2831 | 1457 | 378 | 213 |
| 1962 | 1220184 | 822610 | 406769 | 176081 | 64633 | 49437 | 15612 | 4602 | 4565 | 3322 | 944 | 575 | 228 |
| 1963 | 921847 | 683566 | 467813 | 172120 | 65375 | 29169 | 20968 | 5722 | 1384 | 1546 | 1177 | 355 | 316 |
| 1964 | 469094 | 419633 | 357361 | 173883 | 54996 | 22328 | 10745 | 7071 | 1551 | 375 | 549 | 451 | 265 |
| 1965 | 877072 | 248069 | 265053 | 199140 | 81930 | 23913 | 8562 | 3335 | 2433 | 471 | 132 | 184 | 276 |
| 1966 | 1898952 | 564887 | 163828 | 145851 | 106645 | 44184 | 10977 | 3173 | 1188 | 923 | 197 | 43 | 168 |
| 1967 | 1345933 | 1314472 | 392961 | 104205 | 80363 | 55639 | 20621 | 4325 | 1185 | 493 | 404 | 75 | 84 |
| 1968 | 182244 | 1044265 | 927988 | 292248 | 72737 | 41953 | 23727 | 7444 | 1592 | 446 | 211 | 152 | 71 |
| 1969 | 110672 | 137060 | 733412 | 506291 | 160846 | 41993 | 19536 | 8538 | 2727 | 634 | 206 | 77 | 97 |
| 1970 | 208427 | 85857 | 87719 | 377737 | 239553 | 64563 | 15382 | 5778 | 2790 | 935 | 276 | 80 | 76 |
| 1971 | 409228 | 147141 | 57557 | 44784 | 172920 | 103855 | 22454 | 4728 | 1823 | 1051 | 434 | 112 | 68 |
| 1972 | 1089219 | 315467 | 105422 | 37272 | 27049 | 80956 | 36705 | 6853 | 1593 | 677 | 478 | 186 | 80 |
| 1973 | 1649971 | 783750 | 213460 | 63887 | 21259 | 15811 | 32619 | 9947 | 1959 | 528 | 285 | 185 | 116 |
| 1974 | 567440 | 1152318 | 543859 | 124598 | 35345 | 11385 | 6700 | 10154 | 3464 | 709 | 219 | 115 | 133 |
| 1975 | 627960 | 367309 | 644819 | 267218 | 62643 | 18419 | 5359 | 3014 | 3310 | 1114 | 287 | 74 | 108 |
| 1976 | 590347 | 461706 | 226275 | 301155 | 109613 | 26358 | 7466 | 2257 | 1277 | 980 | 405 | 93 | 83 |
| 1977 | 373244 | 405018 | 288299 | 114281 | 135677 | 43803 | 8975 | 2600 | 1006 | 506 | 332 | 141 | 75 |
| 1978 | 616025 | 248822 | 216216 | 115171 | 48379 | 56035 | 14263 | 2332 | 913 | 353 | 200 | 102 | 80 |
| 1979 | 198796 | 442386 | 156215 | 88023 | 41143 | 17893 | 18447 | 3390 | 730 | 201 | 111 | 54 | 62 |
| 1980 | 128365 | 151820 | 297925 | 90080 | 38767 | 16332 | 6628 | 5054 | 1022 | 168 | 55 | 32 | 35 |
| 1981 | 142156 | 100765 | 108684 | 169479 | 40244 | 15459 | 6137 | 2076 | 1445 | 245 | 51 | 15 | 23 |
| 1982 | 182142 | 122904 | 81996 | 62499 | 81049 | 15508 | 4730 | 1609 | 673 | 398 | 78 | 15 | 13 |
| 1983 | 144806 | 136819 | 90035 | 50413 | 28663 | 27654 | 4928 | 1298 | 589 | 243 | 125 | 28 | 10 |
| 1984 | 448858 | 118126 | 83717 | 53191 | 24225 | 10196 | 7475 | 1325 | 471 | 244 | 97 | 45 | 13 |
| 1985 | 540320 | 395080 | 85354 | 46185 | 24147 | 6123 | 2686 | 1975 | 432 | 180 | 100 | 41 | 20 |
| 1986 | 1510660 | 409608 | 245238 | 48198 | 20529 | 7350 | 1505 | 900 | 766 | 168 | 77 | 45 | 20 |
| 1987 | 367426 | 1057104 | 258965 | 112604 | 17535 | 6952 | 1801 | 506 | 283 | 262 | 61 | 35 | 19 |
| 1988 | 334970 | 243205 | 576045 | 120177 | 35149 | 5241 | 1735 | 599 | 145 | 93 | 83 | 26 | 14 |
| 1989 | 159029 | 228297 | 148558 | 295634 | 55951 | 10345 | 1585 | 521 | 156 | 49 | 32 | 31 | 10 |
| 1990 | 132628 | 129239 | 127523 | 94893 | 138442 | 22308 | 3143 | 615 | 162 | 60 | 19 | 13 | 9 |
| 1991 | 293465 | 127402 | 98718 | 85855 | 62404 | 83545 | 11056 | 1439 | 273 | 64 | 25 | 8 | 5 |
| 1992 | 723267 | 267421 | 103570 | 70436 | 49457 | 34490 | 47893 | 5757 | 802 | 135 | 26 | 11 | 3 |
| 1993 | 1056264 | 508638 | 245293 | 75273 | 37623 | 23817 | 15682 | 25050 | 2918 | 415 | 56 | 12 | 4 |
| 1994 | 796746 | 790392 | 414693 | 147288 | 40446 | 16127 | 10814 | 6315 | 10549 | 1249 | 155 | 22 | 4 |
| 1995 | 558847 | 518529 | 552474 | 237380 | 61331 | 12604 | 5334 | 3547 | 2165 | 3357 | 410 | 57 | 7 |
| 1996 | 413185 | 312289 | 345876 | 286223 | 104429 | 19588 | 4266 | 1597 | 1128 | 615 | 1098 | 138 | 17 |
| 1997 | 811114 | 213155 | 210506 | 186724 | 122105 | 38004 | 6064 | 1586 | 423 | 347 | 196 | 346 | 44 |
| 1998 | 1105318 | 493726 | 130793 | 98132 | 70137 | 42716 | 9200 | 1638 | 358 | 129 | 99 | 61 | 118 |
| 1999 | 647492 | 612174 | 268175 | 64849 | 32569 | 26438 | 11640 | 2483 | 352 | 103 | 43 | 34 | 63 |
| 2000 | 784973 | 415874 | 378377 | 122654 | 24749 | 11301 | 7416 | 2746 | 594 | 111 | 34 | 17 | 37 |
| 2001 | 606468 | 555016 | 292260 | 184069 | 51670 | 9042 | 3417 | 1961 | 701 | 211 | 36 | 15 | 22 |
| 2002 | 379073 | 436131 | 370984 | 187473 | 83078 | 20269 | 3036 | 1213 | 548 | 264 | 79 | 18 | 15 |
| 2003 | 792872 | 294094 | 289262 | 233601 | 83778 | 30341 | 6706 | 1127 | 429 | 245 | 98 | 43 | 13 |
| 2004 | 246610 | 588215 | 218007 | 185075 | 113325 | 34172 | 11009 | 2563 | 435 | 206 | 109 | 53 | 24 |
| 2005 | 670826 | 186770 | 405823 | 139369 | 94340 | 38933 | 11443 | 3959 | 815 | 188 | 87 | 63 | 35 |
| 2006 | 506865 | 444665 | 141336 | 227999 | 68490 | 34371 | 13709 | 3487 | 1306 | 350 | 73 | 50 | 51 |
| 2007 | 1131751 | 418376 | 293215 | 88451 | 114140 | 30581 | 12743 | 4652 | 1233 | 535 | 136 | 40 | 48 |
| 2008 | 947321 | 936798 | 325908 | 162971 | 51028 | 60541 | 15270 | 5690 | 1947 | 545 | 200 | 74 | 43 |
| 2009 | 552570 | 742069 | 723455 | 243591 | 86894 | 32854 | 28550 | 7685 | 2963 | 907 | 221 | 104 | 61 |
| 2010 | 196609 | 435464 | 621553 | 546276 | 162813 | 53681 | 18184 | 14288 | 4420 | 1539 | 334 | 113 | 92 |
| 2011 | 346008 | 177558 | 373299 | 524586 | 381037 | 83794 | 30646 | 9986 | 7613 | 1824 | 709 | 145 | 115 |
| 2012 | 489649 | 269999 | 146071 | 312062 | 398947 | 215820 | 43188 | 15343 | 4820 | 3358 | 867 | 342 | 154 |
| 2013 | 447789 | 368090 | 224843 | 128343 | 237926 | 271221 | 136918 | 21683 | 7700 | 2148 | 1632 | 425 | 311 |
| 2014 | 866502 | 347315 | 295645 | 182909 | 102689 | 171655 | 147450 | 63444 | 10252 | 3377 | 1014 | 827 | 434 |
| 2015 | 448536 | 575790 | 303165 | 216529 | 131818 | 67325 | 98792 | 72978 | 28570 | 4794 | 1499 | 494 | 710 |
| 2016 | 278020 | 316290 | 418003 | 217391 | 136691 | 75962 | 43145 | 53625 | 33007 | 10570 | 2019 | 699 | 636 |
| 2017 | 754961 | 234416 | 231605 | 288427 | 145469 | 81006 | 40859 | 23884 | 22044 | 12266 | 4226 | 875 | 626 |
| 2018 | 496425 | 538531 | 187165 | 162837 | 188871 | 83842 | 39548 | 22020 | 10616 | 6793 | 4311 | 1653 | 625 |
| 2019 | 641521 | 370778 | 396352 | 149929 | 92119 | 110227 | 43925 | 19583 | 8856 | 3551 | 2041 | 1456 | 851 |
| 2020 | 525570 | 420014 | 278653 | 249393 | 100015 | 54461 | 54870 | 21353 | 8214 | 3084 | 1130 | 699 | 831 |
| 2021 | 364537 | 337453 | 311223 | 193114 | 145998 | 52609 | 26692 | 22756 | 8134 | 2553 | 967 | 342 | 530 |
| 2022 | 188503 | 246065 | 242879 | 196916 | 119988 | 74376 | 22611 | 9854 | 6520 | 2264 | 628 | 239 | 236 |
| 2023 | 234295 | 143371 | 163215 | 139604 | 108043 | 60228 | 32125 | 8351 | 2685 | 1579 | 396 | 112 | 114 |
| 2024 | 617595 | 179149 | 105767 | 97134 | 79749 | 49517 | 28419 | 10819 | 2156 | 613 | 269 | 73 | 44 |
| 2025 | 373845 | 398313 | 124760 | 62320 | 53216 | 40034 | 22142 | 9693 | 3274 | 632 | 124 | 56 | 26 |
| 2026 | 131710 | 274428 | 303134 | 89171 | 38333 | 28793 | 19360 | 8838 | 2758 | 1142 | 124 | 26 | 19 |