| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 1984 | 6305 | 2695 | 1679 | 500 | 374 | 121 | 78 | 127 | 471 |
| 1985 | 5104 | 5864 | 2408 | 926 | 243 | 227 | 81 | 46 | 359 |
| 1986 | 4841 | 4524 | 4855 | 1742 | 630 | 152 | 148 | 60 | 269 |
| 1987 | 4282 | 4420 | 3754 | 3158 | 1035 | 403 | 107 | 95 | 216 |
| 1988 | 5944 | 3655 | 3846 | 2664 | 1805 | 504 | 206 | 64 | 181 |
| 1989 | 7605 | 5436 | 2686 | 2613 | 1667 | 1153 | 281 | 118 | 147 |
| 1990 | 7546 | 7111 | 4500 | 1818 | 1617 | 993 | 696 | 156 | 151 |
| 1991 | 8848 | 6681 | 5593 | 2854 | 1088 | 960 | 628 | 442 | 190 |
| 1992 | 6697 | 8473 | 5439 | 3546 | 1561 | 658 | 530 | 357 | 375 |
| 1993 | 3552 | 6346 | 7227 | 3763 | 2258 | 877 | 342 | 280 | 375 |
| 1994 | 3605 | 2955 | 5403 | 5138 | 2341 | 1373 | 399 | 181 | 324 |
| 1995 | 2184 | 3487 | 2596 | 4116 | 3318 | 1518 | 858 | 240 | 313 |
| 1996 | 1471 | 1949 | 3074 | 1819 | 2509 | 1769 | 919 | 484 | 354 |
| 1997 | 3730 | 1121 | 1358 | 1775 | 1227 | 1517 | 1105 | 641 | 543 |
| 1998 | 3582 | 3828 | 842 | 913 | 1047 | 769 | 849 | 716 | 743 |
| 1999 | 2961 | 3305 | 3762 | 593 | 724 | 623 | 513 | 514 | 904 |
| 2000 | 4213 | 2498 | 2667 | 2546 | 419 | 494 | 369 | 342 | 936 |
| 2001 | 5574 | 3848 | 2063 | 1947 | 1459 | 290 | 378 | 199 | 851 |
| 2002 | 4172 | 5430 | 3587 | 1388 | 1458 | 1062 | 216 | 251 | 745 |
| 2003 | 4233 | 3629 | 3993 | 2558 | 991 | 1037 | 574 | 115 | 582 |
| 2004 | 2648 | 4078 | 3617 | 3049 | 1601 | 706 | 553 | 329 | 411 |
| 2005 | 2310 | 2482 | 4112 | 3402 | 2013 | 890 | 356 | 284 | 354 |
| 2006 | 2884 | 2177 | 2093 | 3213 | 2188 | 1353 | 487 | 225 | 414 |
| 2007 | 3209 | 2470 | 1829 | 1550 | 2153 | 1161 | 775 | 333 | 487 |
| 2008 | 2271 | 2981 | 1823 | 1357 | 1046 | 1469 | 711 | 522 | 557 |
| 2009 | 2239 | 2180 | 2573 | 1275 | 994 | 677 | 969 | 432 | 674 |
| 2010 | 1839 | 2081 | 2076 | 1721 | 758 | 669 | 444 | 706 | 808 |
| 2011 | 1602 | 1663 | 1916 | 1520 | 1111 | 471 | 461 | 282 | 1084 |
| 2012 | 1308 | 1455 | 1369 | 1406 | 942 | 787 | 328 | 352 | 1028 |
| 2013 | 1339 | 1149 | 1332 | 1137 | 1047 | 695 | 618 | 237 | 981 |
| 2014 | 2215 | 1139 | 965 | 966 | 796 | 817 | 468 | 506 | 899 |
| 2015 | 2553 | 2041 | 992 | 856 | 632 | 629 | 534 | 317 | 1195 |
| 2016 | 2211 | 2348 | 1975 | 851 | 815 | 412 | 431 | 368 | 1275 |
| 2017 | 1262 | 2273 | 2113 | 1589 | 617 | 689 | 293 | 291 | 1302 |
| 2018 | 2972 | 932 | 1855 | 1742 | 1041 | 376 | 471 | 207 | 1127 |
| 2019 | 2162 | 2767 | 658 | 1548 | 1288 | 685 | 221 | 310 | 992 |
| 2020 | 1812 | 1931 | 2299 | 499 | 1057 | 995 | 522 | 139 | 1016 |
| 2021 | 1014 | 1527 | 1670 | 1493 | 346 | 616 | 644 | 342 | 765 |
| 2022 | 880 | 912 | 1107 | 1358 | 1017 | 244 | 414 | 506 | 831 |
| 2023 | 666 | 798 | 815 | 831 | 926 | 663 | 178 | 275 | 962 |
| 2024 | 1327 | 571 | 660 | 631 | 617 | 649 | 474 | 129 | 918 |
| 2025 | 1327 | 1251 | 490 | 488 | 479 | 474 | 483 | 372 | 754 |