| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 1984 | 6323 | 2726 | 1674 | 497 | 374 | 121 | 78 | 127 | 470 |
| 1985 | 5133 | 5864 | 2417 | 934 | 245 | 227 | 81 | 46 | 359 |
| 1986 | 4871 | 4560 | 4865 | 1736 | 629 | 154 | 149 | 59 | 270 |
| 1987 | 4260 | 4450 | 3786 | 3172 | 1030 | 401 | 108 | 95 | 215 |
| 1988 | 5934 | 3648 | 3855 | 2668 | 1816 | 508 | 207 | 64 | 181 |
| 1989 | 7613 | 5421 | 2705 | 2620 | 1669 | 1156 | 285 | 120 | 147 |
| 1990 | 7579 | 7098 | 4482 | 1825 | 1618 | 996 | 698 | 159 | 152 |
| 1991 | 8936 | 6722 | 5609 | 2850 | 1092 | 963 | 628 | 442 | 192 |
| 1992 | 6770 | 8520 | 5477 | 3578 | 1567 | 659 | 533 | 357 | 375 |
| 1993 | 3569 | 6393 | 7253 | 3785 | 2273 | 880 | 344 | 282 | 378 |
| 1994 | 3614 | 2990 | 5437 | 5145 | 2357 | 1382 | 405 | 182 | 329 |
| 1995 | 2169 | 3479 | 2611 | 4119 | 3324 | 1530 | 864 | 244 | 317 |
| 1996 | 1461 | 1936 | 3049 | 1828 | 2520 | 1789 | 927 | 489 | 356 |
| 1997 | 3782 | 1128 | 1372 | 1782 | 1233 | 1524 | 1115 | 640 | 545 |
| 1998 | 3601 | 3851 | 852 | 928 | 1055 | 776 | 859 | 720 | 744 |
| 1999 | 2964 | 3315 | 3743 | 600 | 729 | 629 | 517 | 521 | 908 |
| 2000 | 4250 | 2512 | 2687 | 2548 | 423 | 498 | 372 | 344 | 940 |
| 2001 | 5618 | 3882 | 2075 | 1967 | 1480 | 292 | 377 | 203 | 851 |
| 2002 | 4266 | 5428 | 3591 | 1407 | 1473 | 1066 | 215 | 251 | 744 |
| 2003 | 4348 | 3728 | 4048 | 2566 | 1003 | 1042 | 580 | 116 | 580 |
| 2004 | 2709 | 4170 | 3669 | 3094 | 1618 | 714 | 567 | 334 | 412 |
| 2005 | 2300 | 2520 | 4145 | 3402 | 2063 | 906 | 369 | 300 | 361 |
| 2006 | 2891 | 2185 | 2112 | 3234 | 2196 | 1373 | 497 | 233 | 427 |
| 2007 | 3229 | 2477 | 1842 | 1552 | 2174 | 1179 | 790 | 336 | 502 |
| 2008 | 2288 | 3006 | 1842 | 1365 | 1048 | 1480 | 726 | 531 | 567 |
| 2009 | 2231 | 2182 | 2586 | 1279 | 987 | 677 | 977 | 444 | 687 |
| 2010 | 1865 | 2060 | 2070 | 1740 | 763 | 665 | 447 | 711 | 819 |
| 2011 | 1621 | 1693 | 1909 | 1513 | 1124 | 476 | 463 | 289 | 1099 |
| 2012 | 1336 | 1470 | 1395 | 1416 | 948 | 800 | 334 | 355 | 1049 |
| 2013 | 1367 | 1178 | 1336 | 1147 | 1057 | 699 | 632 | 244 | 1009 |
| 2014 | 2264 | 1169 | 994 | 975 | 802 | 828 | 478 | 518 | 933 |
| 2015 | 2614 | 2084 | 1016 | 882 | 644 | 627 | 555 | 328 | 1240 |
| 2016 | 2279 | 2402 | 2008 | 865 | 831 | 425 | 440 | 390 | 1312 |
| 2017 | 1271 | 2308 | 2140 | 1604 | 624 | 702 | 297 | 305 | 1340 |
| 2018 | 3045 | 946 | 1888 | 1750 | 1050 | 381 | 481 | 211 | 1164 |
| 2019 | 2202 | 2831 | 668 | 1556 | 1295 | 691 | 224 | 318 | 1011 |
| 2020 | 1873 | 1967 | 2310 | 503 | 1056 | 991 | 517 | 141 | 1022 |
| 2021 | 1036 | 1586 | 1688 | 1505 | 351 | 621 | 651 | 337 | 771 |
| 2022 | 941 | 929 | 1162 | 1372 | 1025 | 250 | 420 | 504 | 822 |
| 2023 | 715 | 854 | 830 | 880 | 950 | 679 | 182 | 280 | 977 |
| 2024 | 1408 | 626 | 721 | 653 | 674 | 703 | 499 | 133 | 976 |
| 2025 | 1791 | 1311 | 563 | 577 | 516 | 560 | 583 | 416 | 893 |