| Table 3. Estimated stock numbers at age. | ||||||||||
| Year Age | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1957 | 26033 | 35790 | 25251 | 20641 | 5424 | 2595 | 1226 | 470 | 202 | 116 |
| 1958 | 32619 | 29468 | 25005 | 14196 | 9583 | 2990 | 1321 | 476 | 177 | 120 |
| 1959 | 59396 | 29567 | 22674 | 12878 | 6341 | 4435 | 1291 | 394 | 134 | 68 |
| 1960 | 81207 | 40464 | 24152 | 13010 | 6160 | 3282 | 1798 | 383 | 103 | 40 |
| 1961 | 82755 | 56823 | 24534 | 12853 | 5636 | 3013 | 1349 | 429 | 90 | 23 |
| 1962 | 81750 | 53697 | 36315 | 12436 | 6470 | 2959 | 1345 | 395 | 109 | 26 |
| 1963 | 41537 | 62442 | 28136 | 16634 | 5467 | 3552 | 1246 | 362 | 82 | 24 |
| 1964 | 18291 | 29140 | 33790 | 11894 | 6612 | 2571 | 1683 | 300 | 61 | 11 |
| 1965 | 17296 | 16488 | 20831 | 17358 | 5338 | 3134 | 1135 | 726 | 62 | 11 |
| 1966 | 30729 | 14913 | 13636 | 13324 | 8408 | 2748 | 1290 | 302 | 102 | 11 |
| 1967 | 43968 | 23972 | 12267 | 9008 | 6989 | 4154 | 1218 | 365 | 69 | 20 |
| 1968 | 28851 | 45719 | 18467 | 8722 | 5420 | 4138 | 1935 | 414 | 102 | 19 |
| 1969 | 31908 | 26350 | 32609 | 11661 | 5149 | 3309 | 2092 | 670 | 125 | 29 |
| 1970 | 20031 | 25794 | 20621 | 19229 | 5688 | 3088 | 1567 | 685 | 202 | 30 |
| 1971 | 24213 | 13881 | 19955 | 13191 | 9834 | 3102 | 1550 | 509 | 270 | 109 |
| 1972 | 29361 | 19669 | 10254 | 12981 | 7009 | 5027 | 1435 | 571 | 179 | 131 |
| 1973 | 124125 | 26015 | 19925 | 4842 | 7472 | 3467 | 3090 | 564 | 285 | 80 |
| 1974 | 114540 | 84905 | 16454 | 12074 | 2316 | 4021 | 1867 | 1865 | 291 | 275 |
| 1975 | 71187 | 94774 | 51619 | 9762 | 6707 | 1452 | 2336 | 1058 | 1161 | 372 |
| 1976 | 25710 | 66986 | 55725 | 29159 | 5948 | 4221 | 1082 | 1731 | 654 | 845 |
| 1977 | 8593 | 18327 | 43043 | 30345 | 15296 | 3896 | 2402 | 741 | 971 | 848 |
| 1978 | 1013 | 7902 | 15152 | 28030 | 17407 | 7007 | 1711 | 1104 | 315 | 503 |
| 1979 | 4845 | 547 | 11793 | 12479 | 17945 | 9772 | 3333 | 664 | 385 | 209 |
| 1980 | 6128 | 5279 | 644 | 13053 | 9467 | 11211 | 6082 | 1787 | 277 | 222 |
| 1981 | 18127 | 4559 | 4002 | 726 | 10044 | 5844 | 6844 | 3619 | 811 | 183 |
| 1982 | 22164 | 16378 | 3455 | 2732 | 613 | 7040 | 3659 | 4302 | 2743 | 570 |
| 1983 | 44769 | 17140 | 12808 | 1694 | 1470 | 352 | 4398 | 2174 | 2519 | 1861 |
| 1984 | 40066 | 40128 | 12895 | 8631 | 792 | 798 | 219 | 2567 | 1149 | 2410 |
| 1985 | 19998 | 34035 | 31647 | 9182 | 4729 | 451 | 427 | 167 | 1333 | 1956 |
| 1986 | 13379 | 15835 | 25517 | 21210 | 5712 | 2527 | 214 | 261 | 105 | 1522 |
| 1987 | 21812 | 9908 | 14706 | 18572 | 12870 | 3377 | 1302 | 132 | 114 | 679 |
| 1988 | 9234 | 20761 | 6174 | 12287 | 12553 | 7739 | 1760 | 565 | 51 | 309 |
| 1989 | 6855 | 7096 | 14787 | 4288 | 9050 | 8070 | 4559 | 1004 | 274 | 161 |
| 1990 | 3255 | 5899 | 7667 | 9626 | 2992 | 5423 | 4543 | 2139 | 404 | 172 |
| 1991 | 2798 | 2492 | 5453 | 6330 | 5681 | 1910 | 2882 | 2144 | 874 | 154 |
| 1992 | 3854 | 2172 | 1641 | 3733 | 4114 | 3482 | 1087 | 1427 | 1111 | 491 |
| 1993 | 20345 | 2713 | 1863 | 1152 | 2376 | 2482 | 2086 | 611 | 794 | 810 |
| 1994 | 25440 | 8536 | 1510 | 1356 | 705 | 1501 | 1603 | 1359 | 394 | 1023 |
| 1995 | 43567 | 37935 | 4110 | 952 | 861 | 430 | 1018 | 1017 | 850 | 902 |
| 1996 | 9680 | 38104 | 45930 | 2455 | 514 | 455 | 338 | 666 | 622 | 1101 |
| 1997 | 3290 | 9269 | 26056 | 44628 | 1493 | 315 | 194 | 222 | 396 | 1065 |
| 1998 | 15574 | 2529 | 6102 | 20544 | 30054 | 869 | 107 | 107 | 115 | 774 |
| 1999 | 21908 | 13756 | 1615 | 3708 | 13451 | 15898 | 360 | 23 | 32 | 329 |
| 2000 | 92773 | 20204 | 11752 | 720 | 1964 | 6905 | 7559 | 131 | 4 | 128 |
| 2001 | 58825 | 88727 | 13957 | 6792 | 360 | 1142 | 3510 | 4067 | 51 | 56 |
| 2002 | 47329 | 41767 | 72728 | 8214 | 3302 | 272 | 676 | 2093 | 2408 | 59 |
| 2003 | 29620 | 26586 | 29135 | 49614 | 4774 | 1510 | 175 | 501 | 1165 | 1318 |
| 2004 | 6830 | 23963 | 20671 | 21041 | 32715 | 2348 | 542 | 90 | 201 | 946 |
| 2005 | 11146 | 4512 | 17725 | 16893 | 16096 | 16886 | 987 | 174 | 30 | 272 |
| 2006 | 2999 | 9379 | 3433 | 11762 | 11830 | 11016 | 5982 | 311 | 55 | 68 |
| 2007 | 3730 | 2474 | 6263 | 2395 | 7807 | 8068 | 5350 | 1665 | 112 | 19 |
| 2008 | 4098 | 2970 | 1894 | 3746 | 1658 | 4794 | 4130 | 2058 | 468 | 38 |
| 2009 | 4676 | 2689 | 2228 | 1286 | 2181 | 1342 | 2946 | 1741 | 637 | 106 |
| 2010 | 13201 | 4214 | 2021 | 1331 | 822 | 1216 | 1062 | 1542 | 741 | 245 |
| 2011 | 955 | 10609 | 3213 | 964 | 659 | 528 | 577 | 611 | 591 | 283 |
| 2012 | 2974 | 750 | 8306 | 1824 | 476 | 307 | 350 | 230 | 269 | 230 |
| 2013 | 4779 | 2835 | 1162 | 5539 | 962 | 252 | 176 | 163 | 105 | 166 |
| 2014 | 9423 | 5148 | 2031 | 1408 | 2998 | 408 | 136 | 85 | 47 | 75 |
| 2015 | 7352 | 7415 | 4849 | 1070 | 1468 | 1117 | 159 | 73 | 38 | 34 |
| 2016 | 25858 | 5834 | 5247 | 2665 | 581 | 968 | 389 | 61 | 35 | 20 |
| 2017 | 28305 | 15766 | 3817 | 3377 | 1328 | 355 | 464 | 154 | 26 | 14 |
| 2018 | 29342 | 30120 | 11535 | 2740 | 2079 | 734 | 248 | 221 | 50 | 10 |
| 2019 | 9206 | 29049 | 20183 | 5884 | 1765 | 1032 | 328 | 166 | 65 | 7 |
| 2020 | 3502 | 9692 | 24690 | 8396 | 1448 | 593 | 276 | 99 | 51 | 4 |
| 2021 | 17167 | 3697 | 15243 | 15908 | 1612 | 267 | 75 | 47 | 19 | 2 |
| 2022 | 33476 | 15993 | 7552 | 19262 | 5897 | 293 | 55 | 14 | 16 | 2 |
| 2023 | 53623 | 23095 | 12076 | 9988 | 13611 | 2022 | 77 | 18 | 7 | 5 |
| 2024 | 142343 | 44756 | 18599 | 7944 | 8975 | 8377 | 1210 | 14 | 9 | 4 |
| 2025 | 84693 | 92417 | 33320 | 13318 | 6104 | 6646 | 4654 | 805 | 9 | 5 |