| Table 3. Estimated stock numbers at age. | |||||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 1946 | 725447 | 596110 | 364582 | 172793 | 78530 | 84785 | 226875 | 80970 | 35549 | 29203 | 19311 | 8188 | 1915 |
| 1947 | 381411 | 581432 | 485949 | 299553 | 134246 | 53829 | 56620 | 132462 | 46023 | 17044 | 13715 | 8441 | 4261 |
| 1948 | 310946 | 307551 | 450604 | 347372 | 207306 | 75613 | 35087 | 30079 | 69136 | 18500 | 7384 | 5676 | 4758 |
| 1949 | 458622 | 268665 | 263422 | 354056 | 229563 | 103863 | 43097 | 16934 | 16090 | 27812 | 7445 | 2905 | 3424 |
| 1950 | 708475 | 368141 | 229305 | 189305 | 208140 | 114750 | 56928 | 22947 | 8677 | 6184 | 10755 | 2771 | 1888 |
| 1951 | 1201068 | 606678 | 298439 | 178250 | 115605 | 110799 | 65929 | 28125 | 11013 | 2990 | 2125 | 3931 | 1238 |
| 1952 | 1239601 | 933295 | 438110 | 189998 | 116200 | 62151 | 60818 | 33173 | 13049 | 4279 | 1029 | 750 | 1318 |
| 1953 | 1558660 | 983527 | 627115 | 243460 | 90870 | 60099 | 33379 | 28305 | 13871 | 4477 | 1381 | 362 | 521 |
| 1954 | 620212 | 1254200 | 699608 | 389600 | 137440 | 49077 | 34687 | 17503 | 12770 | 5005 | 1620 | 506 | 262 |
| 1955 | 264636 | 498719 | 893720 | 434854 | 224553 | 74901 | 30726 | 18138 | 7078 | 4605 | 1806 | 603 | 249 |
| 1956 | 428844 | 208164 | 381865 | 546031 | 211905 | 112792 | 35504 | 14668 | 7019 | 2363 | 1609 | 676 | 295 |
| 1957 | 741888 | 339282 | 145605 | 207982 | 236503 | 94814 | 48874 | 15292 | 5724 | 2359 | 710 | 584 | 354 |
| 1958 | 527666 | 615790 | 246373 | 96251 | 100141 | 108810 | 40957 | 23128 | 6369 | 1937 | 785 | 250 | 368 |
| 1959 | 672567 | 392625 | 412759 | 142297 | 47290 | 47572 | 54683 | 20263 | 9410 | 2266 | 656 | 315 | 263 |
| 1960 | 782380 | 522905 | 242904 | 207714 | 69773 | 23152 | 22963 | 25276 | 8119 | 3574 | 843 | 261 | 250 |
| 1961 | 893578 | 606819 | 340331 | 134170 | 102683 | 36463 | 11410 | 12041 | 9789 | 2833 | 1330 | 345 | 205 |
| 1962 | 729891 | 696560 | 382474 | 169306 | 64419 | 49264 | 15655 | 4608 | 4394 | 3270 | 967 | 521 | 215 |
| 1963 | 460999 | 558448 | 434063 | 165215 | 62680 | 28852 | 20730 | 5754 | 1357 | 1465 | 1156 | 361 | 289 |
| 1964 | 297843 | 366895 | 359192 | 177868 | 54389 | 21436 | 10545 | 6873 | 1504 | 365 | 515 | 429 | 256 |
| 1965 | 674487 | 234420 | 260107 | 200561 | 82794 | 23675 | 8136 | 3205 | 2356 | 444 | 131 | 176 | 266 |
| 1966 | 1546507 | 540038 | 166213 | 146609 | 106526 | 44050 | 10952 | 3022 | 1177 | 876 | 188 | 44 | 168 |
| 1967 | 1200809 | 1241357 | 395405 | 107065 | 81227 | 55421 | 20411 | 4390 | 1121 | 490 | 376 | 70 | 86 |
| 1968 | 175286 | 997705 | 885039 | 280770 | 72913 | 42524 | 23737 | 7265 | 1624 | 412 | 204 | 140 | 69 |
| 1969 | 107385 | 135399 | 696612 | 493588 | 154856 | 41334 | 19755 | 8549 | 2616 | 652 | 187 | 75 | 91 |
| 1970 | 189358 | 83969 | 86858 | 366346 | 237381 | 64322 | 15119 | 5830 | 2747 | 899 | 280 | 72 | 72 |
| 1971 | 374753 | 146189 | 57853 | 45178 | 173470 | 103009 | 22502 | 4578 | 1860 | 1016 | 416 | 110 | 61 |
| 1972 | 945568 | 304799 | 105604 | 37393 | 27174 | 81644 | 36083 | 6968 | 1527 | 693 | 455 | 170 | 74 |
| 1973 | 1631759 | 760037 | 213455 | 64507 | 21214 | 15782 | 32478 | 9711 | 1970 | 499 | 294 | 172 | 103 |
| 1974 | 558863 | 1162338 | 518369 | 123606 | 35669 | 11275 | 6523 | 10226 | 3418 | 695 | 206 | 112 | 117 |
| 1975 | 589689 | 367630 | 657890 | 258857 | 61760 | 18612 | 5310 | 2990 | 3346 | 1124 | 278 | 67 | 95 |
| 1976 | 570271 | 443673 | 227547 | 309062 | 108420 | 26064 | 7575 | 2210 | 1223 | 1016 | 417 | 86 | 69 |
| 1977 | 355513 | 399606 | 272637 | 113020 | 136594 | 43289 | 8844 | 2673 | 993 | 470 | 348 | 129 | 59 |
| 1978 | 602820 | 247715 | 215400 | 112069 | 47544 | 55738 | 14030 | 2250 | 925 | 348 | 170 | 94 | 60 |
| 1979 | 205555 | 447244 | 155788 | 89970 | 40621 | 17577 | 18426 | 3257 | 700 | 198 | 94 | 39 | 40 |
| 1980 | 132117 | 158912 | 302235 | 87418 | 39103 | 16079 | 6516 | 5075 | 980 | 156 | 52 | 22 | 16 |
| 1981 | 143550 | 103829 | 114684 | 175261 | 38095 | 15659 | 6039 | 2063 | 1414 | 231 | 48 | 13 | 8 |
| 1982 | 177980 | 124482 | 84025 | 64617 | 82280 | 15210 | 4623 | 1511 | 630 | 389 | 75 | 14 | 7 |
| 1983 | 136572 | 134307 | 91845 | 52000 | 29040 | 28373 | 4891 | 1223 | 563 | 223 | 123 | 26 | 7 |
| 1984 | 423192 | 112675 | 82257 | 53865 | 24754 | 10683 | 7747 | 1353 | 429 | 238 | 90 | 45 | 10 |
| 1985 | 488525 | 370164 | 80868 | 44887 | 24378 | 6351 | 2768 | 1916 | 435 | 159 | 97 | 39 | 17 |
| 1986 | 1192145 | 381060 | 233902 | 45495 | 19090 | 7429 | 1584 | 974 | 761 | 172 | 67 | 46 | 17 |
| 1987 | 318354 | 946335 | 247963 | 106655 | 16426 | 6845 | 1763 | 557 | 258 | 251 | 56 | 33 | 18 |
| 1988 | 306379 | 230348 | 574273 | 117673 | 33062 | 4977 | 1730 | 602 | 119 | 67 | 62 | 27 | 12 |
| 1989 | 150707 | 220849 | 145983 | 301492 | 54342 | 9740 | 1447 | 476 | 105 | 30 | 14 | 28 | 10 |
| 1990 | 126760 | 126999 | 129054 | 95217 | 142983 | 22459 | 2805 | 507 | 129 | 33 | 8 | 7 | 7 |
| 1991 | 282928 | 124318 | 97186 | 86118 | 61806 | 82509 | 11187 | 1302 | 227 | 48 | 11 | 4 | 3 |
| 1992 | 655463 | 262498 | 99717 | 68842 | 48979 | 33958 | 46636 | 5813 | 733 | 113 | 19 | 6 | 1 |
| 1993 | 852206 | 475475 | 234345 | 71963 | 36583 | 23628 | 15522 | 23944 | 2801 | 371 | 40 | 10 | 1 |
| 1994 | 577147 | 658797 | 379809 | 142738 | 38665 | 15867 | 10682 | 6374 | 9735 | 1146 | 110 | 16 | 2 |
| 1995 | 364765 | 426722 | 494738 | 225292 | 62387 | 12276 | 5227 | 3422 | 2202 | 3220 | 291 | 35 | 2 |
| 1996 | 282884 | 268618 | 318879 | 275434 | 102574 | 19594 | 4228 | 1517 | 1116 | 625 | 973 | 79 | 2 |
| 1997 | 594041 | 192208 | 197049 | 179227 | 119207 | 37341 | 6229 | 1632 | 384 | 345 | 191 | 300 | 7 |
| 1998 | 818608 | 437192 | 122697 | 94660 | 70683 | 41641 | 9384 | 1598 | 344 | 102 | 94 | 57 | 69 |
| 1999 | 557185 | 576115 | 256083 | 61139 | 33003 | 26103 | 11590 | 2481 | 327 | 94 | 28 | 29 | 41 |
| 2000 | 675989 | 396237 | 364490 | 120340 | 24346 | 11213 | 7379 | 2606 | 555 | 101 | 28 | 9 | 27 |
| 2001 | 539023 | 516562 | 286589 | 182419 | 51968 | 8952 | 3365 | 1894 | 642 | 188 | 29 | 11 | 14 |
| 2002 | 335562 | 415686 | 363340 | 183339 | 82379 | 20307 | 3056 | 1152 | 530 | 241 | 69 | 13 | 9 |
| 2003 | 690263 | 282111 | 284177 | 232569 | 84369 | 30180 | 6688 | 1099 | 420 | 240 | 90 | 36 | 7 |
| 2004 | 217423 | 557125 | 212396 | 181084 | 115582 | 33841 | 10873 | 2593 | 449 | 208 | 108 | 48 | 18 |
| 2005 | 598280 | 178386 | 398928 | 135179 | 93611 | 38943 | 11121 | 3857 | 776 | 192 | 86 | 63 | 29 |
| 2006 | 498274 | 447667 | 139013 | 229459 | 68153 | 33653 | 13317 | 3260 | 1237 | 333 | 72 | 50 | 47 |
| 2007 | 1128066 | 422154 | 292406 | 87818 | 118922 | 30128 | 12283 | 4317 | 1105 | 509 | 124 | 39 | 43 |
| 2008 | 906040 | 937351 | 330069 | 163970 | 52901 | 62037 | 15111 | 5483 | 1841 | 479 | 189 | 67 | 38 |
| 2009 | 512900 | 760337 | 731240 | 246575 | 89187 | 33239 | 28505 | 7537 | 2859 | 864 | 190 | 98 | 53 |
| 2010 | 171516 | 431606 | 635562 | 546299 | 164843 | 54163 | 18619 | 14286 | 4354 | 1444 | 311 | 97 | 80 |
| 2011 | 279025 | 164842 | 372425 | 526447 | 383192 | 85244 | 30946 | 10424 | 7719 | 1846 | 633 | 141 | 95 |
| 2012 | 412478 | 257317 | 146074 | 312947 | 401296 | 217887 | 44075 | 15650 | 4999 | 3555 | 878 | 308 | 134 |
| 2013 | 372581 | 353104 | 225769 | 129000 | 239340 | 262087 | 132755 | 22580 | 8091 | 2289 | 1784 | 427 | 261 |
| 2014 | 683335 | 328859 | 292652 | 182055 | 101317 | 167399 | 143995 | 63211 | 10688 | 3597 | 1114 | 871 | 386 |
| 2015 | 370290 | 531594 | 294558 | 214133 | 131107 | 67545 | 94761 | 72532 | 28720 | 4841 | 1666 | 524 | 680 |
| 2016 | 257642 | 299371 | 405231 | 215899 | 135996 | 76117 | 43016 | 52183 | 33171 | 10788 | 2100 | 749 | 620 |
| 2017 | 614333 | 224127 | 224256 | 289746 | 145471 | 79098 | 40769 | 23791 | 22340 | 12032 | 4450 | 885 | 648 |
| 2018 | 426628 | 510500 | 183001 | 157695 | 185464 | 85047 | 39788 | 21253 | 10537 | 7191 | 4555 | 1714 | 664 |
| 2019 | 523647 | 342490 | 373312 | 146710 | 90598 | 106884 | 44988 | 19182 | 8714 | 3587 | 2469 | 1567 | 945 |
| 2020 | 403059 | 388227 | 267154 | 243820 | 98703 | 53207 | 53578 | 21672 | 7797 | 3063 | 1214 | 790 | 937 |
| 2021 | 292589 | 316200 | 299121 | 189583 | 143723 | 52155 | 25960 | 22773 | 8152 | 2536 | 986 | 339 | 587 |
| 2022 | 164542 | 237571 | 237937 | 193206 | 118475 | 71917 | 22825 | 9641 | 6600 | 2470 | 674 | 225 | 258 |
| 2023 | 198345 | 134853 | 159639 | 139258 | 105996 | 60190 | 31424 | 8389 | 2604 | 1712 | 520 | 110 | 114 |
| 2024 | 476512 | 161014 | 100966 | 94305 | 78282 | 48624 | 27909 | 10628 | 2148 | 635 | 361 | 78 | 44 |
| 2025 | 308341 | 365091 | 120346 | 61126 | 51986 | 38664 | 21459 | 9478 | 3304 | 662 | 148 | 60 | 26 |
| 2026 | 103995 | 244531 | 276835 | 84624 | 38350 | 27293 | 18411 | 8405 | 2724 | 1210 | 146 | 24 | 19 |