| Table 3. Estimated stock numbers at age. | ||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 1985 | 448372 | 52079 | 24447 | 21809 | 4191 | 1129 | 363 | 207 |
| 1986 | 172471 | 129787 | 23134 | 8857 | 4871 | 846 | 286 | 140 |
| 1987 | 87534 | 45129 | 66489 | 8289 | 2047 | 982 | 207 | 109 |
| 1988 | 87124 | 22172 | 22044 | 23153 | 2086 | 459 | 250 | 89 |
| 1989 | 130159 | 22557 | 8915 | 8570 | 5372 | 504 | 125 | 90 |
| 1990 | 227227 | 34398 | 11338 | 3499 | 2251 | 1272 | 148 | 66 |
| 1991 | 403447 | 60738 | 18038 | 4286 | 809 | 492 | 333 | 67 |
| 1992 | 178298 | 121023 | 29433 | 6471 | 976 | 151 | 119 | 101 |
| 1993 | 324116 | 42504 | 59395 | 11585 | 1485 | 195 | 26 | 51 |
| 1994 | 490643 | 88067 | 21411 | 26883 | 3537 | 286 | 34 | 17 |
| 1995 | 211618 | 145559 | 51942 | 8937 | 8297 | 1084 | 76 | 9 |
| 1996 | 473132 | 49500 | 104873 | 23748 | 2140 | 2193 | 248 | 13 |
| 1997 | 663223 | 131581 | 14583 | 49169 | 5096 | 572 | 508 | 78 |
| 1998 | 260792 | 197010 | 57950 | 5845 | 9936 | 1180 | 157 | 141 |
| 1999 | 228216 | 65378 | 88380 | 20623 | 1694 | 1908 | 295 | 90 |
| 2000 | 155010 | 66890 | 29361 | 29053 | 5436 | 356 | 420 | 84 |
| 2001 | 283090 | 45055 | 38298 | 10854 | 7253 | 1368 | 84 | 120 |
| 2002 | 107945 | 86311 | 24400 | 15133 | 2530 | 1496 | 359 | 40 |
| 2003 | 307154 | 28952 | 52723 | 8547 | 3019 | 557 | 344 | 99 |
| 2004 | 108672 | 98591 | 14400 | 21706 | 2263 | 598 | 153 | 116 |
| 2005 | 100575 | 29332 | 65545 | 5720 | 5683 | 566 | 134 | 68 |
| 2006 | 34499 | 32028 | 16294 | 29815 | 1844 | 1394 | 139 | 40 |
| 2007 | 13680 | 9361 | 17376 | 7820 | 8270 | 694 | 404 | 49 |
| 2008 | 116707 | 3238 | 6137 | 6774 | 2661 | 1822 | 246 | 144 |
| 2009 | 53780 | 36068 | 3342 | 4053 | 2120 | 782 | 383 | 108 |
| 2010 | 74988 | 13954 | 26817 | 2293 | 1454 | 589 | 198 | 109 |
| 2011 | 65284 | 19473 | 7690 | 15673 | 1155 | 419 | 121 | 68 |
| 2012 | 138600 | 16407 | 11126 | 4304 | 4681 | 582 | 124 | 37 |
| 2013 | 89496 | 39331 | 8748 | 6246 | 1514 | 1255 | 207 | 56 |
| 2014 | 52049 | 23943 | 22173 | 4300 | 2135 | 377 | 304 | 59 |
| 2015 | 14124 | 13385 | 12367 | 10284 | 1386 | 545 | 89 | 98 |
| 2016 | 138257 | 2871 | 7327 | 4416 | 3517 | 401 | 126 | 50 |
| 2017 | 8226 | 43370 | 1628 | 4041 | 1421 | 781 | 95 | 45 |
| 2018 | 11608 | 2028 | 24395 | 705 | 1420 | 352 | 154 | 34 |
| 2019 | 22116 | 2942 | 949 | 12234 | 285 | 383 | 73 | 38 |
| 2020 | 25655 | 5591 | 1354 | 480 | 4795 | 80 | 76 | 24 |
| 2021 | 33747 | 6397 | 2561 | 609 | 138 | 1212 | 17 | 20 |
| 2022 | 56871 | 7831 | 2430 | 988 | 183 | 38 | 201 | 8 |
| 2023 | 42362 | 13681 | 2423 | 773 | 286 | 49 | 8 | 37 |
| 2024 | 37851 | 10619 | 4744 | 605 | 217 | 73 | 11 | 9 |
| 2025 | 6200 | 10845 | 4222 | 1402 | 151 | 64 | 16 | 4 |
| 2026 | 6200 | 1678 | 5180 | 2338 | 428 | 45 | 14 | 5 |