| Table 3. Estimated stock numbers at age. | |||||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 1946 | 1120545 | 676451 | 373153 | 172562 | 78649 | 84649 | 227822 | 80644 | 36166 | 30599 | 18904 | 8130 | 1994 |
| 1947 | 601107 | 672217 | 497822 | 298177 | 133555 | 53619 | 56358 | 132812 | 45637 | 17350 | 14626 | 8431 | 4498 |
| 1948 | 460958 | 345385 | 461734 | 346880 | 206545 | 75339 | 34883 | 29910 | 69641 | 18390 | 7636 | 6067 | 4952 |
| 1949 | 635190 | 296810 | 266971 | 353071 | 229280 | 103886 | 43001 | 16895 | 15930 | 28219 | 7438 | 2993 | 3597 |
| 1950 | 1009901 | 401944 | 233141 | 188664 | 208390 | 114945 | 57067 | 22801 | 8640 | 6100 | 11046 | 2742 | 1935 |
| 1951 | 2367489 | 761986 | 312613 | 178664 | 115222 | 110905 | 66014 | 28245 | 10907 | 2986 | 2091 | 4020 | 1197 |
| 1952 | 2306516 | 1112839 | 456526 | 190311 | 115892 | 61840 | 60991 | 33234 | 13128 | 4203 | 1025 | 730 | 1279 |
| 1953 | 2381164 | 1107677 | 635305 | 244597 | 91483 | 60079 | 33205 | 28555 | 13978 | 4535 | 1347 | 357 | 480 |
| 1954 | 839365 | 1369366 | 707085 | 386825 | 137679 | 49251 | 34652 | 17295 | 12918 | 5065 | 1648 | 496 | 246 |
| 1955 | 385217 | 557059 | 917156 | 433316 | 223146 | 74843 | 30594 | 18087 | 6932 | 4688 | 1837 | 617 | 240 |
| 1956 | 759200 | 247444 | 396379 | 548528 | 211353 | 112432 | 35611 | 14591 | 7015 | 2280 | 1650 | 691 | 298 |
| 1957 | 1425851 | 412430 | 152059 | 209704 | 237946 | 94737 | 49062 | 15423 | 5679 | 2355 | 669 | 594 | 362 |
| 1958 | 920685 | 709163 | 251357 | 95930 | 100613 | 109347 | 40984 | 23283 | 6439 | 1912 | 778 | 231 | 380 |
| 1959 | 1310999 | 484033 | 426561 | 141776 | 47134 | 47755 | 54728 | 20183 | 9531 | 2304 | 641 | 318 | 268 |
| 1960 | 1465767 | 625144 | 253655 | 207825 | 69635 | 23061 | 23047 | 25339 | 8043 | 3640 | 862 | 257 | 260 |
| 1961 | 1526797 | 700834 | 347517 | 134426 | 102637 | 36316 | 11308 | 12018 | 9808 | 2787 | 1369 | 360 | 209 |
| 1962 | 1243128 | 800192 | 389550 | 168143 | 64295 | 49262 | 15634 | 4554 | 4383 | 3278 | 944 | 539 | 220 |
| 1963 | 917371 | 700448 | 453257 | 165124 | 62484 | 28749 | 20752 | 5758 | 1326 | 1458 | 1160 | 352 | 299 |
| 1964 | 478854 | 415617 | 370232 | 179224 | 54762 | 21568 | 10546 | 6925 | 1523 | 351 | 512 | 432 | 257 |
| 1965 | 889497 | 254078 | 260188 | 200243 | 83192 | 23813 | 8208 | 3222 | 2387 | 453 | 123 | 171 | 266 |
| 1966 | 1842962 | 574036 | 168501 | 145339 | 106306 | 44085 | 10968 | 3048 | 1182 | 893 | 192 | 40 | 163 |
| 1967 | 1304584 | 1270111 | 399683 | 107185 | 80832 | 55329 | 20410 | 4379 | 1137 | 491 | 387 | 73 | 82 |
| 1968 | 180813 | 1005066 | 887763 | 279923 | 72559 | 42392 | 23766 | 7293 | 1618 | 423 | 206 | 145 | 70 |
| 1969 | 111505 | 136516 | 698914 | 494196 | 154296 | 40977 | 19628 | 8557 | 2635 | 649 | 194 | 75 | 95 |
| 1970 | 209926 | 86788 | 87934 | 367317 | 237893 | 64456 | 15082 | 5830 | 2769 | 917 | 280 | 75 | 75 |
| 1971 | 410696 | 148599 | 58368 | 45640 | 174141 | 103222 | 22577 | 4575 | 1864 | 1031 | 428 | 113 | 65 |
| 1972 | 1059813 | 316013 | 106216 | 37466 | 27378 | 81799 | 36116 | 6975 | 1523 | 696 | 466 | 181 | 80 |
| 1973 | 1671690 | 756021 | 213253 | 64271 | 21304 | 15884 | 32362 | 9743 | 1989 | 499 | 297 | 180 | 114 |
| 1974 | 568250 | 1169629 | 516118 | 123216 | 35521 | 11370 | 6642 | 10170 | 3408 | 703 | 207 | 117 | 130 |
| 1975 | 608078 | 369891 | 663354 | 258055 | 61512 | 18479 | 5377 | 3071 | 3318 | 1119 | 284 | 68 | 109 |
| 1976 | 586476 | 443301 | 228389 | 310608 | 108430 | 26015 | 7498 | 2268 | 1295 | 1008 | 418 | 89 | 82 |
| 1977 | 371400 | 402259 | 272476 | 113024 | 136802 | 43302 | 8833 | 2620 | 1040 | 519 | 350 | 136 | 73 |
| 1978 | 624191 | 248048 | 216120 | 112144 | 47556 | 55659 | 14034 | 2250 | 893 | 379 | 204 | 99 | 76 |
| 1979 | 206786 | 447720 | 155706 | 90490 | 40829 | 17661 | 18386 | 3268 | 698 | 187 | 115 | 50 | 57 |
| 1980 | 132774 | 158576 | 302052 | 87104 | 39173 | 16132 | 6547 | 5032 | 981 | 155 | 49 | 31 | 31 |
| 1981 | 144778 | 104448 | 114160 | 175003 | 37955 | 15646 | 6034 | 2071 | 1394 | 231 | 47 | 12 | 20 |
| 1982 | 180539 | 125084 | 83892 | 64446 | 81921 | 15180 | 4646 | 1522 | 641 | 379 | 74 | 13 | 11 |
| 1983 | 139657 | 135843 | 92106 | 51981 | 28966 | 28241 | 4893 | 1236 | 568 | 230 | 119 | 26 | 9 |
| 1984 | 443033 | 114344 | 83526 | 54229 | 24686 | 10648 | 7697 | 1353 | 438 | 241 | 94 | 42 | 12 |
| 1985 | 523667 | 383958 | 81611 | 44978 | 24403 | 6383 | 2800 | 1907 | 438 | 166 | 100 | 41 | 18 |
| 1986 | 1358255 | 398684 | 242106 | 46148 | 19109 | 7468 | 1602 | 1003 | 745 | 175 | 73 | 46 | 19 |
| 1987 | 353093 | 993375 | 253706 | 108942 | 16318 | 6847 | 1793 | 572 | 285 | 253 | 61 | 35 | 19 |
| 1988 | 331353 | 237717 | 591787 | 118722 | 32829 | 4983 | 1733 | 626 | 133 | 89 | 72 | 27 | 12 |
| 1989 | 158962 | 228992 | 148026 | 306562 | 54723 | 9822 | 1474 | 485 | 126 | 40 | 28 | 27 | 10 |
| 1990 | 133865 | 130032 | 130803 | 95980 | 143341 | 22758 | 2902 | 533 | 137 | 48 | 16 | 11 | 7 |
| 1991 | 299548 | 127354 | 98258 | 86647 | 61814 | 82590 | 11390 | 1370 | 248 | 55 | 21 | 7 | 4 |
| 1992 | 710450 | 271265 | 100980 | 69188 | 48885 | 33851 | 46529 | 5989 | 791 | 131 | 25 | 10 | 3 |
| 1993 | 987133 | 503144 | 239850 | 72437 | 36628 | 23591 | 15474 | 23787 | 2969 | 423 | 56 | 13 | 3 |
| 1994 | 746290 | 733662 | 397546 | 146460 | 38747 | 15880 | 10603 | 6333 | 9644 | 1288 | 156 | 24 | 4 |
| 1995 | 534187 | 491272 | 522518 | 231225 | 63087 | 12372 | 5284 | 3402 | 2180 | 3166 | 412 | 59 | 7 |
| 1996 | 394906 | 301288 | 334434 | 283561 | 104173 | 19747 | 4269 | 1568 | 1098 | 613 | 995 | 143 | 17 |
| 1997 | 763843 | 204579 | 202322 | 182270 | 120218 | 37496 | 6249 | 1637 | 423 | 333 | 191 | 325 | 46 |
| 1998 | 1029738 | 466037 | 124851 | 97099 | 71008 | 41784 | 9434 | 1621 | 349 | 126 | 94 | 61 | 117 |
| 1999 | 618744 | 594215 | 261237 | 61819 | 32871 | 26130 | 11572 | 2502 | 339 | 97 | 43 | 32 | 66 |
| 2000 | 744883 | 409141 | 373672 | 121661 | 24367 | 11222 | 7403 | 2620 | 571 | 106 | 32 | 18 | 40 |
| 2001 | 587942 | 534588 | 290773 | 184520 | 51898 | 8952 | 3388 | 1925 | 651 | 195 | 34 | 15 | 24 |
| 2002 | 373919 | 429366 | 367998 | 185925 | 82045 | 20261 | 3061 | 1165 | 554 | 244 | 75 | 18 | 15 |
| 2003 | 756990 | 287537 | 287373 | 235123 | 84426 | 30194 | 6702 | 1105 | 428 | 254 | 93 | 43 | 13 |
| 2004 | 240700 | 577006 | 214538 | 182083 | 115692 | 33826 | 10869 | 2591 | 451 | 212 | 119 | 52 | 24 |
| 2005 | 688306 | 185115 | 406225 | 135861 | 93815 | 39050 | 11135 | 3860 | 788 | 193 | 91 | 73 | 36 |
| 2006 | 534817 | 466269 | 140815 | 231744 | 68377 | 33811 | 13363 | 3281 | 1247 | 340 | 74 | 54 | 59 |
| 2007 | 1251986 | 437373 | 303390 | 88620 | 119517 | 30276 | 12389 | 4355 | 1127 | 510 | 129 | 41 | 52 |
| 2008 | 1015735 | 977320 | 336258 | 167325 | 53108 | 62153 | 15157 | 5533 | 1857 | 492 | 188 | 71 | 44 |
| 2009 | 592582 | 797565 | 745300 | 248457 | 89234 | 33255 | 28594 | 7572 | 2907 | 862 | 199 | 99 | 60 |
| 2010 | 206843 | 463270 | 654543 | 552898 | 165278 | 54124 | 18625 | 14314 | 4366 | 1481 | 310 | 102 | 87 |
| 2011 | 364720 | 183715 | 382161 | 533472 | 385353 | 85566 | 30888 | 10383 | 7724 | 1855 | 663 | 137 | 105 |
| 2012 | 508128 | 278540 | 147642 | 315687 | 403335 | 218958 | 44195 | 15634 | 4986 | 3526 | 878 | 321 | 141 |
| 2013 | 466692 | 372152 | 227034 | 129251 | 239524 | 262140 | 132561 | 22536 | 8047 | 2254 | 1739 | 426 | 285 |
| 2014 | 844782 | 354627 | 297987 | 182069 | 100955 | 166912 | 143706 | 63175 | 10654 | 3536 | 1074 | 854 | 411 |
| 2015 | 445310 | 565561 | 299336 | 214681 | 130672 | 67258 | 94416 | 72333 | 28648 | 4789 | 1599 | 509 | 699 |
| 2016 | 280933 | 311882 | 416216 | 216116 | 135319 | 75790 | 42692 | 51783 | 32971 | 10714 | 2041 | 724 | 631 |
| 2017 | 750044 | 234414 | 226317 | 286554 | 143882 | 78666 | 40556 | 23597 | 22055 | 11855 | 4315 | 863 | 641 |
| 2018 | 478218 | 522298 | 185046 | 158313 | 184252 | 84515 | 39635 | 21168 | 10430 | 7015 | 4344 | 1659 | 643 |
| 2019 | 610584 | 356241 | 379647 | 147080 | 90203 | 106319 | 44730 | 19128 | 8695 | 3552 | 2302 | 1483 | 894 |
| 2020 | 524385 | 415614 | 272639 | 246169 | 98570 | 52989 | 53238 | 21517 | 7737 | 3076 | 1168 | 743 | 869 |
| 2021 | 365272 | 334911 | 307891 | 191002 | 143570 | 52066 | 25826 | 22577 | 8022 | 2505 | 968 | 332 | 542 |
| 2022 | 183327 | 242069 | 238702 | 192517 | 118415 | 71902 | 22805 | 9602 | 6509 | 2397 | 629 | 224 | 234 |
| 2023 | 233237 | 139957 | 162073 | 138983 | 105565 | 60087 | 31405 | 8367 | 2584 | 1678 | 452 | 102 | 104 |
| 2024 | 589269 | 173525 | 102835 | 94840 | 78020 | 48494 | 27833 | 10654 | 2147 | 633 | 318 | 70 | 37 |
| 2025 | 349977 | 372169 | 120413 | 61230 | 51840 | 38588 | 21383 | 9483 | 3294 | 664 | 137 | 56 | 22 |
| 2026 | 120618 | 255873 | 280554 | 84727 | 38260 | 27167 | 18273 | 8357 | 2715 | 1203 | 138 | 24 | 17 |