| Table 3. Estimated stock numbers at age. | |||||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 1946 | 1652686 | 715413 | 385842 | 175138 | 81796 | 89152 | 241456 | 91144 | 35512 | 32816 | 17915 | 7731 | 2526 |
| 1947 | 532632 | 857374 | 527097 | 308572 | 137051 | 55839 | 59424 | 142973 | 54161 | 19917 | 18255 | 9725 | 6323 |
| 1948 | 259125 | 311695 | 545627 | 368304 | 217039 | 78904 | 36008 | 31375 | 71648 | 19715 | 8602 | 7016 | 6580 |
| 1949 | 478250 | 211949 | 257235 | 395468 | 241964 | 114666 | 44479 | 18255 | 16641 | 29828 | 7509 | 3142 | 4470 |
| 1950 | 740407 | 326638 | 194875 | 186353 | 225808 | 120902 | 60640 | 22875 | 9212 | 6462 | 12157 | 2487 | 2410 |
| 1951 | 2742813 | 679778 | 275388 | 160192 | 114327 | 116547 | 66561 | 29552 | 10614 | 3047 | 2047 | 3962 | 1287 |
| 1952 | 2575053 | 1221185 | 419457 | 173791 | 105425 | 59366 | 61983 | 32294 | 13723 | 4267 | 1082 | 623 | 1460 |
| 1953 | 3131030 | 1208674 | 656896 | 227004 | 83381 | 54300 | 31169 | 27905 | 12455 | 4070 | 1145 | 286 | 434 |
| 1954 | 893787 | 1662510 | 748172 | 390791 | 130994 | 45934 | 33034 | 17002 | 13536 | 4930 | 1666 | 450 | 258 |
| 1955 | 371305 | 549731 | 1025682 | 450961 | 223668 | 72906 | 29063 | 17881 | 7334 | 5189 | 1867 | 626 | 254 |
| 1956 | 702503 | 233869 | 393277 | 585763 | 221253 | 111897 | 35522 | 14266 | 7281 | 2316 | 1922 | 704 | 305 |
| 1957 | 1373956 | 378607 | 143886 | 208366 | 249678 | 94511 | 48558 | 14617 | 5337 | 2166 | 565 | 594 | 318 |
| 1958 | 1160298 | 728844 | 237773 | 91600 | 102991 | 113607 | 42206 | 22338 | 6028 | 1775 | 736 | 162 | 338 |
| 1959 | 1438728 | 557219 | 433780 | 134565 | 46280 | 48899 | 56113 | 20026 | 9287 | 2265 | 634 | 369 | 236 |
| 1960 | 1633935 | 670467 | 273989 | 210450 | 66959 | 22906 | 23815 | 25751 | 8231 | 3822 | 933 | 260 | 321 |
| 1961 | 1644640 | 758310 | 365337 | 139965 | 103578 | 35399 | 11529 | 12382 | 10396 | 2866 | 1582 | 426 | 231 |
| 1962 | 1274168 | 851380 | 406662 | 172822 | 64134 | 48410 | 15325 | 4513 | 4687 | 3257 | 862 | 572 | 227 |
| 1963 | 727943 | 699945 | 464479 | 170489 | 64624 | 27700 | 20400 | 5466 | 1378 | 1602 | 1155 | 301 | 304 |
| 1964 | 393220 | 361040 | 366209 | 183842 | 56786 | 21715 | 9742 | 6575 | 1387 | 324 | 538 | 448 | 224 |
| 1965 | 823724 | 222211 | 244259 | 202603 | 85286 | 24196 | 8254 | 3139 | 2250 | 398 | 98 | 164 | 250 |
| 1966 | 2050163 | 535272 | 155222 | 143025 | 108767 | 44637 | 10979 | 3149 | 1118 | 887 | 175 | 28 | 133 |
| 1967 | 1359796 | 1377627 | 381330 | 100790 | 80361 | 56949 | 21138 | 4490 | 1228 | 510 | 416 | 83 | 56 |
| 1968 | 176518 | 1078778 | 941004 | 269561 | 69077 | 42564 | 24724 | 7821 | 1648 | 435 | 210 | 167 | 69 |
| 1969 | 94437 | 137189 | 733261 | 513107 | 150987 | 40361 | 19438 | 8931 | 2866 | 681 | 211 | 73 | 98 |
| 1970 | 195436 | 77193 | 87689 | 376733 | 236376 | 62378 | 14758 | 5483 | 2646 | 854 | 258 | 83 | 69 |
| 1971 | 338711 | 136576 | 54782 | 45383 | 175813 | 102619 | 21863 | 4651 | 1729 | 1007 | 403 | 108 | 64 |
| 1972 | 935659 | 279338 | 101158 | 36403 | 26999 | 83411 | 38701 | 7088 | 1712 | 680 | 483 | 205 | 79 |
| 1973 | 2345899 | 690444 | 197056 | 61404 | 20649 | 15253 | 31301 | 10320 | 1855 | 487 | 256 | 166 | 112 |
| 1974 | 721575 | 1538271 | 485351 | 115676 | 33975 | 11056 | 6770 | 10132 | 3616 | 709 | 204 | 126 | 122 |
| 1975 | 619794 | 411062 | 759063 | 247244 | 58184 | 17496 | 5247 | 2981 | 3157 | 1118 | 288 | 61 | 95 |
| 1976 | 733196 | 455844 | 240389 | 337557 | 109106 | 25568 | 7414 | 2289 | 1366 | 931 | 404 | 96 | 78 |
| 1977 | 400410 | 492330 | 275080 | 117023 | 144581 | 44571 | 9248 | 2797 | 1154 | 688 | 318 | 170 | 81 |
| 1978 | 673631 | 250282 | 234681 | 114115 | 47772 | 56200 | 14462 | 2574 | 970 | 480 | 364 | 101 | 87 |
| 1979 | 185467 | 468305 | 152491 | 91797 | 39857 | 16514 | 16549 | 3231 | 635 | 167 | 116 | 64 | 44 |
| 1980 | 115954 | 139591 | 304281 | 87773 | 38865 | 15570 | 6010 | 4786 | 920 | 151 | 37 | 32 | 21 |
| 1981 | 128291 | 92444 | 100217 | 170844 | 40601 | 14578 | 5493 | 1936 | 1366 | 228 | 47 | 9 | 15 |
| 1982 | 193838 | 121544 | 74184 | 63089 | 79819 | 15449 | 4374 | 1586 | 605 | 378 | 75 | 14 | 9 |
| 1983 | 138747 | 144062 | 88012 | 46045 | 29507 | 26844 | 5003 | 1323 | 583 | 224 | 120 | 33 | 9 |
| 1984 | 356656 | 115228 | 87615 | 50511 | 20792 | 9746 | 6806 | 1442 | 477 | 264 | 109 | 40 | 17 |
| 1985 | 650652 | 332403 | 85834 | 47072 | 21004 | 5321 | 2454 | 1911 | 433 | 173 | 106 | 53 | 23 |
| 1986 | 1167629 | 460402 | 225546 | 46809 | 19727 | 6028 | 1412 | 979 | 802 | 198 | 87 | 54 | 33 |
| 1987 | 365507 | 851197 | 262340 | 100095 | 16050 | 5814 | 1490 | 530 | 315 | 292 | 66 | 44 | 32 |
| 1988 | 289006 | 224011 | 502978 | 115038 | 29094 | 4181 | 1467 | 470 | 148 | 102 | 76 | 23 | 18 |
| 1989 | 168986 | 193060 | 146359 | 267111 | 50978 | 8780 | 1375 | 467 | 134 | 47 | 34 | 22 | 16 |
| 1990 | 144278 | 126487 | 121368 | 92414 | 133211 | 20048 | 2888 | 546 | 152 | 59 | 19 | 13 | 11 |
| 1991 | 333390 | 132988 | 100154 | 86216 | 62438 | 81916 | 10666 | 1417 | 260 | 60 | 34 | 10 | 11 |
| 1992 | 812529 | 298897 | 109225 | 68749 | 51371 | 34850 | 47043 | 6284 | 894 | 168 | 28 | 21 | 12 |
| 1993 | 962964 | 608700 | 251095 | 81264 | 38925 | 25982 | 16289 | 24780 | 3209 | 526 | 95 | 19 | 16 |
| 1994 | 781192 | 788536 | 462315 | 156423 | 43916 | 17461 | 11084 | 6350 | 9617 | 1377 | 193 | 33 | 10 |
| 1995 | 578907 | 548649 | 547750 | 264093 | 64934 | 14363 | 5699 | 3473 | 2116 | 3347 | 415 | 65 | 14 |
| 1996 | 524009 | 333216 | 359264 | 302780 | 114481 | 20767 | 4436 | 1585 | 1003 | 672 | 1145 | 143 | 26 |
| 1997 | 846870 | 263202 | 210956 | 197357 | 134297 | 42004 | 6875 | 1753 | 506 | 357 | 213 | 386 | 58 |
| 1998 | 1278086 | 535589 | 151912 | 101042 | 77767 | 44790 | 10353 | 1660 | 357 | 161 | 83 | 58 | 127 |
| 1999 | 627448 | 682894 | 288380 | 68208 | 34076 | 27474 | 12057 | 2478 | 353 | 114 | 64 | 28 | 73 |
| 2000 | 686450 | 449683 | 412665 | 133589 | 26363 | 11660 | 7617 | 2618 | 604 | 127 | 38 | 30 | 45 |
| 2001 | 609159 | 532582 | 314641 | 200190 | 53227 | 9218 | 3317 | 1780 | 595 | 202 | 39 | 19 | 42 |
| 2002 | 397434 | 458270 | 385980 | 195340 | 89291 | 20774 | 3218 | 1133 | 545 | 220 | 96 | 23 | 28 |
| 2003 | 790871 | 316451 | 331758 | 244227 | 93911 | 34708 | 7210 | 1147 | 422 | 270 | 92 | 68 | 27 |
| 2004 | 249190 | 570623 | 232074 | 197026 | 117324 | 38404 | 12855 | 2721 | 500 | 288 | 156 | 53 | 44 |
| 2005 | 532089 | 178245 | 377618 | 133998 | 88978 | 39207 | 11293 | 3817 | 787 | 228 | 125 | 113 | 49 |
| 2006 | 491063 | 392006 | 129737 | 213165 | 65834 | 33559 | 13216 | 3447 | 1299 | 399 | 88 | 84 | 146 |
| 2007 | 1213318 | 398695 | 260871 | 80076 | 106334 | 29443 | 12004 | 4014 | 1160 | 559 | 149 | 42 | 105 |
| 2008 | 1026423 | 976068 | 327456 | 164741 | 52174 | 59093 | 14811 | 5108 | 1599 | 629 | 201 | 86 | 69 |
| 2009 | 554639 | 784779 | 753980 | 250167 | 101054 | 35388 | 33074 | 8178 | 2920 | 1041 | 306 | 108 | 89 |
| 2010 | 225546 | 435443 | 669723 | 605695 | 181389 | 69187 | 22727 | 17693 | 5331 | 2058 | 415 | 179 | 120 |
| 2011 | 346931 | 198173 | 390224 | 562062 | 425132 | 100169 | 37974 | 12014 | 8526 | 2456 | 1173 | 151 | 166 |
| 2012 | 500807 | 279346 | 163763 | 334224 | 438739 | 262261 | 53342 | 19476 | 6348 | 4670 | 1344 | 675 | 187 |
| 2013 | 520383 | 373652 | 238158 | 145969 | 275900 | 316978 | 167910 | 28374 | 10878 | 3949 | 2529 | 768 | 657 |
| 2014 | 814358 | 393897 | 310320 | 193475 | 114465 | 193758 | 173228 | 75692 | 12782 | 5397 | 1893 | 1491 | 929 |
| 2015 | 469900 | 593176 | 326502 | 241565 | 143429 | 80231 | 117966 | 89037 | 32973 | 7238 | 2585 | 1039 | 1481 |
| 2016 | 281652 | 297783 | 422308 | 227348 | 148970 | 82883 | 48508 | 61107 | 39492 | 14206 | 3582 | 1431 | 1497 |
| 2017 | 728698 | 239325 | 223278 | 291376 | 146023 | 85114 | 44063 | 25453 | 24299 | 18851 | 6872 | 1941 | 1548 |
| 2018 | 570034 | 525623 | 199204 | 162792 | 196062 | 86081 | 42781 | 23323 | 12105 | 10934 | 7991 | 3696 | 1742 |
| 2019 | 658053 | 432402 | 419688 | 161365 | 102809 | 119309 | 47157 | 21386 | 9477 | 5907 | 4388 | 3890 | 2637 |
| 2020 | 467300 | 414252 | 287916 | 258301 | 102163 | 60107 | 61749 | 24630 | 9973 | 5690 | 3015 | 2439 | 3032 |
| 2021 | 283483 | 284620 | 284132 | 184826 | 140856 | 50372 | 27838 | 25840 | 10704 | 4853 | 3089 | 1721 | 2750 |
| 2022 | 184620 | 199298 | 213162 | 188194 | 117581 | 75470 | 23025 | 10772 | 8450 | 5192 | 2604 | 1782 | 1999 |
| 2023 | 233674 | 125361 | 136833 | 128626 | 102340 | 60052 | 33575 | 8853 | 2945 | 2885 | 2736 | 1408 | 2138 |
| 2024 | 591160 | 170186 | 92709 | 82003 | 71224 | 50315 | 29328 | 13602 | 2551 | 981 | 1691 | 2053 | 2661 |