| Table 3. Estimated stock numbers at age. | |||||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 1946 | 1087625 | 691020 | 358796 | 172983 | 82360 | 84526 | 226634 | 84105 | 34820 | 31426 | 17608 | 7695 | 2397 |
| 1947 | 608971 | 649723 | 511537 | 292010 | 133324 | 55964 | 57561 | 137068 | 49890 | 18110 | 16292 | 8544 | 5264 |
| 1948 | 447637 | 351147 | 443695 | 350110 | 204981 | 75795 | 36868 | 30631 | 71021 | 19064 | 8268 | 6735 | 5615 |
| 1949 | 647393 | 288427 | 274489 | 348969 | 229427 | 104026 | 42482 | 17537 | 16579 | 29336 | 7734 | 3188 | 3932 |
| 1950 | 1043474 | 410365 | 226499 | 192268 | 208121 | 113782 | 56883 | 22790 | 9134 | 6332 | 12060 | 2778 | 2051 |
| 1951 | 2330825 | 792293 | 320822 | 175640 | 117276 | 111900 | 65952 | 28208 | 10749 | 3064 | 2136 | 4412 | 1164 |
| 1952 | 2320115 | 1090770 | 479101 | 192546 | 114439 | 63227 | 61707 | 33359 | 13324 | 4240 | 1058 | 737 | 1303 |
| 1953 | 2370719 | 1113785 | 616873 | 250960 | 91930 | 59940 | 33362 | 28252 | 13607 | 4525 | 1320 | 366 | 452 |
| 1954 | 878908 | 1361593 | 710460 | 382838 | 141392 | 48113 | 34711 | 17674 | 13088 | 5034 | 1688 | 495 | 237 |
| 1955 | 373953 | 586686 | 909058 | 437347 | 224512 | 77326 | 31244 | 18384 | 7119 | 4859 | 1872 | 638 | 235 |
| 1956 | 768212 | 237859 | 423005 | 551544 | 212466 | 114833 | 35990 | 14871 | 7087 | 2326 | 1776 | 711 | 300 |
| 1957 | 1452329 | 418215 | 143940 | 214628 | 235918 | 94761 | 48617 | 15281 | 5786 | 2347 | 672 | 627 | 366 |
| 1958 | 904759 | 727962 | 255947 | 93011 | 101576 | 107103 | 40287 | 23102 | 6431 | 1934 | 768 | 226 | 393 |
| 1959 | 1315443 | 471898 | 443451 | 144187 | 46393 | 47646 | 55450 | 20185 | 9408 | 2319 | 643 | 320 | 273 |
| 1960 | 1498133 | 627755 | 244523 | 210852 | 71379 | 22959 | 22759 | 25322 | 8109 | 3732 | 878 | 261 | 266 |
| 1961 | 1585147 | 717249 | 349832 | 133537 | 103567 | 37430 | 11495 | 12231 | 9924 | 2818 | 1441 | 374 | 212 |
| 1962 | 1215628 | 835031 | 401397 | 168073 | 64849 | 49512 | 15925 | 4642 | 4529 | 3314 | 943 | 569 | 226 |
| 1963 | 930505 | 680770 | 479408 | 167437 | 61690 | 29746 | 21016 | 5887 | 1375 | 1529 | 1176 | 354 | 313 |
| 1964 | 479310 | 423626 | 356138 | 183584 | 55329 | 21277 | 10733 | 6956 | 1563 | 371 | 543 | 448 | 263 |
| 1965 | 857366 | 253956 | 267264 | 197671 | 85094 | 23299 | 8130 | 3242 | 2418 | 471 | 130 | 182 | 274 |
| 1966 | 1887030 | 550235 | 168218 | 147132 | 105941 | 44764 | 10862 | 3071 | 1181 | 915 | 198 | 43 | 167 |
| 1967 | 1337758 | 1308162 | 378695 | 109423 | 80979 | 55600 | 20865 | 4356 | 1160 | 491 | 400 | 75 | 83 |
| 1968 | 186642 | 1037272 | 923260 | 274126 | 74970 | 42023 | 23574 | 7406 | 1601 | 437 | 209 | 150 | 71 |
| 1969 | 109826 | 140728 | 729543 | 503846 | 151613 | 43996 | 20126 | 8629 | 2712 | 639 | 201 | 76 | 97 |
| 1970 | 210110 | 84931 | 90998 | 373781 | 239850 | 63402 | 15470 | 5815 | 2791 | 932 | 278 | 78 | 76 |
| 1971 | 407717 | 148713 | 56567 | 47768 | 173748 | 103477 | 22216 | 4670 | 1834 | 1048 | 433 | 112 | 67 |
| 1972 | 1086982 | 313639 | 106235 | 36460 | 28211 | 80274 | 36360 | 7000 | 1577 | 682 | 476 | 185 | 79 |
| 1973 | 1636631 | 781426 | 211430 | 64659 | 20786 | 16194 | 32878 | 9621 | 1976 | 522 | 287 | 184 | 115 |
| 1974 | 564842 | 1146477 | 540967 | 122496 | 35899 | 11078 | 6607 | 10245 | 3409 | 711 | 216 | 115 | 132 |
| 1975 | 629703 | 365877 | 649733 | 264140 | 61235 | 18773 | 5279 | 3060 | 3328 | 1105 | 288 | 72 | 108 |
| 1976 | 592786 | 462274 | 223967 | 307928 | 109963 | 26250 | 7582 | 2215 | 1290 | 988 | 404 | 93 | 83 |
| 1977 | 369390 | 407793 | 289258 | 111660 | 137357 | 43621 | 8935 | 2664 | 999 | 513 | 336 | 139 | 75 |
| 1978 | 615159 | 245650 | 221352 | 115572 | 46846 | 56546 | 14208 | 2289 | 922 | 354 | 204 | 102 | 79 |
| 1979 | 192805 | 443490 | 153323 | 92750 | 42000 | 17345 | 18482 | 3314 | 720 | 200 | 111 | 54 | 61 |
| 1980 | 136728 | 146124 | 299842 | 87077 | 40153 | 16133 | 6489 | 5135 | 1008 | 164 | 54 | 32 | 34 |
| 1981 | 136861 | 108462 | 102851 | 172347 | 38517 | 15968 | 6182 | 2083 | 1448 | 241 | 50 | 15 | 22 |
| 1982 | 166409 | 123618 | 83376 | 61451 | 80934 | 15002 | 4745 | 1572 | 657 | 395 | 76 | 15 | 13 |
| 1983 | 141318 | 129118 | 87084 | 51670 | 28615 | 28437 | 4783 | 1294 | 585 | 234 | 124 | 27 | 10 |
| 1984 | 420415 | 120640 | 80681 | 52338 | 24055 | 10836 | 7803 | 1376 | 465 | 241 | 94 | 44 | 13 |
| 1985 | 520089 | 372768 | 87682 | 44999 | 23918 | 6129 | 2775 | 1941 | 453 | 176 | 99 | 40 | 19 |
| 1986 | 1482450 | 397765 | 240146 | 46412 | 19302 | 7046 | 1524 | 988 | 764 | 177 | 75 | 45 | 19 |
| 1987 | 379594 | 998382 | 260610 | 105578 | 16246 | 6684 | 1779 | 540 | 299 | 263 | 63 | 34 | 19 |
| 1988 | 347514 | 250686 | 564203 | 114403 | 32847 | 5194 | 1785 | 630 | 140 | 98 | 82 | 27 | 13 |
| 1989 | 164576 | 230299 | 157077 | 299046 | 51913 | 9586 | 1579 | 543 | 146 | 46 | 33 | 30 | 10 |
| 1990 | 133378 | 134265 | 128496 | 97568 | 142040 | 20406 | 2817 | 609 | 165 | 56 | 18 | 13 | 9 |
| 1991 | 291409 | 128360 | 99904 | 87110 | 61657 | 81908 | 10417 | 1360 | 279 | 65 | 24 | 8 | 5 |
| 1992 | 724006 | 269812 | 105923 | 70117 | 49098 | 33226 | 47121 | 5628 | 779 | 140 | 27 | 11 | 3 |
| 1993 | 1030378 | 511483 | 239402 | 73496 | 37704 | 23428 | 14718 | 24553 | 2868 | 412 | 58 | 12 | 3 |
| 1994 | 790495 | 746322 | 401303 | 149991 | 38479 | 16750 | 10642 | 5955 | 10243 | 1264 | 155 | 24 | 4 |
| 1995 | 575011 | 499214 | 520587 | 240267 | 62914 | 12726 | 5451 | 3324 | 2014 | 3402 | 415 | 57 | 7 |
| 1996 | 439625 | 316996 | 336944 | 293833 | 108053 | 19802 | 4248 | 1573 | 1066 | 596 | 1106 | 141 | 17 |
| 1997 | 837208 | 227691 | 211184 | 187477 | 125386 | 40767 | 6298 | 1606 | 426 | 333 | 192 | 352 | 46 |
| 1998 | 1127674 | 490167 | 138657 | 101903 | 73144 | 44770 | 9989 | 1578 | 362 | 131 | 96 | 60 | 122 |
| 1999 | 651316 | 613848 | 275674 | 65576 | 34050 | 27422 | 12639 | 2517 | 344 | 104 | 45 | 33 | 65 |
| 2000 | 782591 | 416028 | 378511 | 125922 | 25388 | 11588 | 7794 | 2688 | 585 | 108 | 34 | 18 | 38 |
| 2001 | 606331 | 541681 | 294326 | 187363 | 53046 | 9318 | 3437 | 1962 | 673 | 207 | 36 | 16 | 23 |
| 2002 | 381589 | 435704 | 371060 | 191166 | 82648 | 20323 | 3135 | 1163 | 569 | 254 | 79 | 18 | 15 |
| 2003 | 801731 | 289226 | 288424 | 244103 | 85911 | 29883 | 6596 | 1115 | 424 | 257 | 96 | 43 | 14 |
| 2004 | 249472 | 579737 | 219533 | 184748 | 115124 | 34468 | 10980 | 2625 | 437 | 206 | 115 | 52 | 24 |
| 2005 | 687223 | 191162 | 404214 | 134013 | 96564 | 38123 | 11360 | 3933 | 819 | 190 | 88 | 68 | 35 |
| 2006 | 510981 | 454685 | 146484 | 221509 | 66969 | 33678 | 13448 | 3435 | 1273 | 355 | 74 | 51 | 54 |
| 2007 | 1104415 | 418524 | 303706 | 88167 | 117547 | 28957 | 12134 | 4452 | 1229 | 529 | 137 | 40 | 49 |
| 2008 | 952258 | 932329 | 320763 | 164896 | 52909 | 60789 | 14791 | 5446 | 1951 | 547 | 195 | 74 | 43 |
| 2009 | 575875 | 786471 | 729431 | 242241 | 89064 | 32869 | 28134 | 7508 | 2893 | 914 | 219 | 101 | 62 |
| 2010 | 208334 | 456935 | 655679 | 570282 | 158391 | 56240 | 18243 | 14446 | 4334 | 1502 | 331 | 111 | 90 |
| 2011 | 366144 | 187501 | 379861 | 549198 | 396026 | 85087 | 31375 | 10245 | 7819 | 1783 | 684 | 143 | 113 |
| 2012 | 483297 | 281712 | 153460 | 319913 | 417303 | 221577 | 43734 | 15458 | 4835 | 3425 | 844 | 330 | 151 |
| 2013 | 435687 | 362322 | 228401 | 131319 | 240442 | 279583 | 140917 | 22647 | 7773 | 2149 | 1664 | 413 | 300 |
| 2014 | 841712 | 344045 | 291859 | 182631 | 102421 | 175996 | 151402 | 64115 | 10600 | 3396 | 1016 | 838 | 418 |
| 2015 | 437436 | 562486 | 298489 | 213562 | 132064 | 67752 | 101450 | 74474 | 29109 | 4886 | 1513 | 493 | 703 |
| 2016 | 276629 | 312857 | 408530 | 213890 | 137870 | 75723 | 43629 | 54513 | 34103 | 10821 | 2060 | 703 | 630 |
| 2017 | 722953 | 231579 | 232177 | 282894 | 139710 | 81706 | 40547 | 23685 | 22423 | 12616 | 4325 | 889 | 626 |
| 2018 | 474004 | 531262 | 184185 | 162888 | 187442 | 82486 | 39055 | 21995 | 10475 | 6907 | 4448 | 1686 | 634 |
| 2019 | 656442 | 358569 | 390705 | 151106 | 89186 | 110400 | 43227 | 19117 | 8775 | 3514 | 2108 | 1503 | 874 |
| 2020 | 577238 | 418980 | 273596 | 246939 | 99985 | 53550 | 54459 | 20866 | 8060 | 3050 | 1128 | 713 | 858 |
| 2021 | 372837 | 348867 | 312814 | 185236 | 143763 | 51431 | 26744 | 22636 | 7831 | 2524 | 957 | 338 | 542 |
| 2022 | 183577 | 249555 | 244027 | 191121 | 117102 | 75208 | 22149 | 9758 | 6477 | 2198 | 624 | 235 | 239 |
| 2023 | 210102 | 143294 | 162096 | 139421 | 106093 | 60374 | 32210 | 8420 | 2618 | 1549 | 394 | 111 | 112 |
| 2024 | 605188 | 171616 | 103678 | 95363 | 78885 | 49074 | 28792 | 10696 | 2143 | 583 | 271 | 71 | 43 |
| 2025 | 382447 | 388584 | 120669 | 61696 | 52410 | 39941 | 22421 | 9819 | 3239 | 613 | 121 | 56 | 25 |
| 2026 | 131774 | 273661 | 295380 | 86961 | 37715 | 28624 | 19585 | 9284 | 2904 | 1087 | 125 | 25 | 18 |