| Table 3. Estimated stock numbers at age. | |||||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 
| 1946 | 1418455 | 680868 | 383883 | 180688 | 85103 | 89669 | 241850 | 85545 | 36548 | 32417 | 18294 | 8025 | 2537 | 
| 1947 | 618153 | 821761 | 494639 | 292046 | 132444 | 55811 | 59374 | 145959 | 50852 | 19657 | 17769 | 9999 | 5824 | 
| 1948 | 407605 | 358650 | 554008 | 353634 | 198574 | 75914 | 34143 | 31135 | 74168 | 19472 | 8256 | 7125 | 6001 | 
| 1949 | 577552 | 274488 | 268060 | 396706 | 234777 | 110018 | 44403 | 17756 | 16059 | 30232 | 7570 | 3104 | 4095 | 
| 1950 | 877373 | 375226 | 221690 | 190726 | 236441 | 120544 | 60595 | 22816 | 8851 | 6186 | 11943 | 2687 | 2084 | 
| 1951 | 2464376 | 675590 | 291232 | 169811 | 117520 | 123830 | 67185 | 30124 | 10729 | 3037 | 2026 | 3959 | 1120 | 
| 1952 | 2324011 | 1154573 | 417369 | 179040 | 104295 | 60233 | 66578 | 32998 | 14033 | 4125 | 1077 | 673 | 1259 | 
| 1953 | 2580328 | 1107903 | 666464 | 232993 | 90115 | 53327 | 30937 | 29904 | 12970 | 4218 | 1158 | 302 | 377 | 
| 1954 | 850205 | 1455742 | 703593 | 400503 | 132395 | 49817 | 32261 | 16315 | 14293 | 5166 | 1691 | 468 | 228 | 
| 1955 | 388862 | 557437 | 964104 | 425962 | 224539 | 72330 | 29222 | 17381 | 7147 | 5440 | 1952 | 658 | 239 | 
| 1956 | 744609 | 251192 | 386639 | 563681 | 213449 | 110996 | 36037 | 13943 | 7234 | 2315 | 1916 | 736 | 313 | 
| 1957 | 1417463 | 406063 | 155086 | 211295 | 248719 | 90778 | 49028 | 15075 | 5097 | 2163 | 600 | 606 | 344 | 
| 1958 | 1031665 | 701870 | 246199 | 91843 | 106427 | 116393 | 42054 | 22721 | 6097 | 1690 | 720 | 201 | 371 | 
| 1959 | 1324982 | 542472 | 423439 | 135474 | 44830 | 51462 | 56691 | 19772 | 9643 | 2319 | 639 | 342 | 280 | 
| 1960 | 1479197 | 626484 | 286804 | 216353 | 66419 | 21964 | 25602 | 26510 | 8123 | 3859 | 950 | 279 | 309 | 
| 1961 | 1527068 | 700808 | 346439 | 147739 | 109004 | 34569 | 10976 | 12813 | 10860 | 2918 | 1546 | 413 | 248 | 
| 1962 | 1250110 | 796756 | 383486 | 163069 | 65738 | 51146 | 15263 | 4358 | 4676 | 3407 | 925 | 559 | 246 | 
| 1963 | 840542 | 707426 | 443051 | 161870 | 60841 | 27203 | 21186 | 5546 | 1341 | 1522 | 1207 | 337 | 324 | 
| 1964 | 484448 | 385824 | 371365 | 183848 | 55831 | 21125 | 9333 | 6695 | 1449 | 328 | 500 | 429 | 257 | 
| 1965 | 906258 | 263114 | 244455 | 201520 | 86715 | 24661 | 8268 | 3136 | 2220 | 433 | 104 | 152 | 250 | 
| 1966 | 1897625 | 585527 | 179547 | 144042 | 107628 | 44535 | 11174 | 3188 | 1159 | 870 | 182 | 32 | 141 | 
| 1967 | 1261522 | 1288940 | 406927 | 114012 | 81844 | 56875 | 20975 | 4559 | 1268 | 503 | 411 | 79 | 73 | 
| 1968 | 186574 | 956430 | 887757 | 262854 | 71216 | 43781 | 25349 | 7826 | 1679 | 477 | 215 | 164 | 73 | 
| 1969 | 111320 | 143515 | 657066 | 498290 | 143581 | 38699 | 19403 | 9226 | 2898 | 677 | 221 | 81 | 107 | 
| 1970 | 213633 | 88593 | 95692 | 343304 | 230227 | 60718 | 13976 | 5473 | 2737 | 933 | 274 | 84 | 83 | 
| 1971 | 388947 | 152507 | 61365 | 53016 | 164813 | 100204 | 21532 | 4361 | 1791 | 1043 | 442 | 117 | 78 | 
| 1972 | 993080 | 300206 | 109840 | 39866 | 31585 | 80768 | 38872 | 7013 | 1576 | 710 | 504 | 209 | 97 | 
| 1973 | 1863770 | 702572 | 203037 | 65546 | 22808 | 17057 | 29295 | 10284 | 1888 | 464 | 276 | 178 | 132 | 
| 1974 | 642986 | 1325149 | 463530 | 113618 | 35342 | 12221 | 7715 | 9540 | 3557 | 701 | 204 | 122 | 149 | 
| 1975 | 598879 | 429680 | 728004 | 230362 | 55238 | 17576 | 5661 | 3241 | 3088 | 1093 | 268 | 63 | 114 | 
| 1976 | 610339 | 434674 | 257389 | 341347 | 104467 | 24689 | 7338 | 2370 | 1416 | 951 | 404 | 90 | 85 | 
| 1977 | 373823 | 423403 | 258124 | 123079 | 145219 | 44086 | 9345 | 2795 | 1115 | 650 | 370 | 157 | 81 | 
| 1978 | 623567 | 249700 | 220553 | 108778 | 49059 | 54771 | 14623 | 2778 | 1014 | 424 | 291 | 114 | 84 | 
| 1979 | 208481 | 446449 | 148365 | 91168 | 39161 | 17377 | 15636 | 3312 | 693 | 189 | 96 | 47 | 39 | 
| 1980 | 129861 | 160510 | 298044 | 81041 | 38869 | 15760 | 6419 | 4366 | 950 | 159 | 44 | 18 | 12 | 
| 1981 | 160047 | 102035 | 115679 | 170114 | 36081 | 14653 | 5480 | 1982 | 1178 | 221 | 42 | 9 | 4 | 
| 1982 | 175415 | 131639 | 81348 | 62226 | 77721 | 13729 | 4611 | 1609 | 660 | 328 | 74 | 14 | 5 | 
| 1983 | 157375 | 130057 | 93130 | 47819 | 25303 | 24360 | 4151 | 1398 | 582 | 238 | 109 | 30 | 7 | 
| 1984 | 416380 | 124035 | 84857 | 54886 | 21300 | 8451 | 6994 | 1243 | 531 | 247 | 103 | 43 | 13 | 
| 1985 | 562243 | 366403 | 83671 | 44927 | 23750 | 5314 | 2156 | 2027 | 392 | 206 | 102 | 49 | 19 | 
| 1986 | 1117550 | 438231 | 247279 | 43418 | 18729 | 6999 | 1416 | 802 | 842 | 180 | 99 | 56 | 26 | 
| 1987 | 330561 | 966693 | 264593 | 104822 | 14842 | 6043 | 1685 | 480 | 243 | 281 | 63 | 49 | 25 | 
| 1988 | 301045 | 244011 | 621740 | 114690 | 29951 | 4337 | 1461 | 461 | 120 | 53 | 59 | 25 | 13 | 
| 1989 | 191052 | 224694 | 154943 | 336965 | 49168 | 8481 | 1294 | 395 | 90 | 24 | 9 | 21 | 9 | 
| 1990 | 157320 | 148820 | 145115 | 104338 | 164688 | 20485 | 2919 | 531 | 125 | 29 | 8 | 5 | 6 | 
| 1991 | 400967 | 135462 | 109406 | 97791 | 66534 | 94140 | 10984 | 1511 | 265 | 53 | 11 | 3 | 3 | 
| 1992 | 748905 | 320318 | 107555 | 75167 | 57409 | 37493 | 53091 | 6401 | 945 | 162 | 29 | 7 | 2 | 
| 1993 | 928263 | 543193 | 253433 | 70748 | 37981 | 28007 | 17543 | 27570 | 3279 | 522 | 80 | 18 | 2 | 
| 1994 | 739038 | 716299 | 405932 | 147339 | 35452 | 16565 | 11996 | 7117 | 11793 | 1312 | 182 | 31 | 3 | 
| 1995 | 511654 | 505767 | 525398 | 223619 | 57577 | 12082 | 5372 | 3610 | 2281 | 3548 | 300 | 43 | 1 | 
| 1996 | 412129 | 306518 | 345392 | 285309 | 97906 | 18813 | 4188 | 1589 | 1132 | 650 | 1043 | 65 | 1 | 
| 1997 | 672873 | 222410 | 206899 | 183656 | 122077 | 37293 | 6035 | 1537 | 501 | 340 | 181 | 293 | 3 | 
| 1998 | 982501 | 437106 | 127581 | 98341 | 70697 | 41669 | 9992 | 1548 | 359 | 124 | 81 | 57 | 69 | 
| 1999 | 560843 | 601564 | 252441 | 59015 | 33085 | 25437 | 11620 | 2611 | 329 | 101 | 31 | 27 | 44 | 
| 2000 | 673915 | 409838 | 379971 | 117881 | 23218 | 11206 | 7058 | 2666 | 624 | 94 | 27 | 9 | 29 | 
| 2001 | 552118 | 525240 | 301586 | 187798 | 51119 | 8825 | 3513 | 1903 | 695 | 232 | 29 | 13 | 19 | 
| 2002 | 418677 | 419569 | 373440 | 191196 | 83812 | 20080 | 3112 | 1235 | 616 | 274 | 97 | 14 | 12 | 
| 2003 | 701431 | 313111 | 295290 | 244915 | 87615 | 32896 | 7018 | 1163 | 461 | 306 | 116 | 57 | 10 | 
| 2004 | 253885 | 569134 | 220415 | 190381 | 122839 | 36369 | 12850 | 2877 | 498 | 261 | 177 | 70 | 36 | 
| 2005 | 631562 | 194267 | 406751 | 136742 | 98744 | 41638 | 11721 | 4303 | 946 | 216 | 130 | 120 | 60 | 
| 2006 | 541737 | 458554 | 142557 | 236643 | 70892 | 36383 | 13726 | 3736 | 1478 | 450 | 101 | 86 | 127 | 
| 2007 | 1432635 | 447595 | 301566 | 88439 | 126800 | 31499 | 13185 | 4514 | 1278 | 638 | 186 | 54 | 108 | 
| 2008 | 1261332 | 1078039 | 355964 | 171224 | 53692 | 67544 | 16241 | 6136 | 1956 | 685 | 283 | 112 | 91 | 
| 2009 | 695740 | 940231 | 845107 | 268734 | 96217 | 36385 | 35643 | 9376 | 3428 | 1108 | 371 | 173 | 132 | 
| 2010 | 291574 | 517760 | 762526 | 640358 | 186298 | 59947 | 22143 | 19040 | 5854 | 1967 | 534 | 235 | 204 | 
| 2011 | 493993 | 223288 | 437711 | 620303 | 452754 | 99082 | 36033 | 12424 | 10021 | 2804 | 1118 | 280 | 291 | 
| 2012 | 586912 | 343949 | 171632 | 363355 | 473481 | 269530 | 54207 | 19882 | 6839 | 5220 | 1612 | 754 | 402 | 
| 2013 | 647775 | 410778 | 257993 | 145903 | 274400 | 320535 | 162807 | 29468 | 11257 | 3911 | 3131 | 1075 | 907 | 
| 2014 | 838302 | 437871 | 332036 | 200982 | 113844 | 193740 | 186349 | 83876 | 15316 | 5978 | 2281 | 2102 | 1459 | 
| 2015 | 498453 | 583952 | 327275 | 234376 | 145524 | 79492 | 116798 | 99253 | 40591 | 8287 | 3444 | 1512 | 2568 | 
| 2016 | 339936 | 336976 | 450432 | 236385 | 149436 | 91118 | 50000 | 64330 | 49505 | 18628 | 4790 | 2276 | 2907 | 
| 2017 | 931483 | 276927 | 251495 | 317088 | 165841 | 90788 | 51645 | 28382 | 30280 | 23881 | 10556 | 3182 | 3573 | 
| 2018 | 652281 | 610729 | 216885 | 185790 | 214755 | 102498 | 49393 | 27679 | 13385 | 13407 | 13127 | 7068 | 4650 | 
| 2019 | 796723 | 471939 | 471647 | 178538 | 113320 | 135212 | 57102 | 26292 | 12793 | 5963 | 7117 | 8913 | 8282 | 
| 2020 | 796723 | 540761 | 360761 | 327897 | 123469 | 74330 | 79156 | 31901 | 13258 | 6372 | 3480 | 5041 | 13135 |