| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 2000 | 845 | 385 | 191 | 85 | 8 | 1 | 0 | 0 | 0 |
| 2001 | 1334 | 692 | 311 | 93 | 13 | 2 | 0 | 0 | 0 |
| 2002 | 1382 | 1092 | 558 | 150 | 15 | 4 | 1 | 0 | 0 |
| 2003 | 1482 | 1131 | 881 | 266 | 26 | 4 | 1 | 0 | 0 |
| 2004 | 2014 | 1213 | 913 | 436 | 41 | 7 | 1 | 1 | 0 |
| 2005 | 5682 | 1648 | 979 | 453 | 77 | 11 | 2 | 1 | 0 |
| 2006 | 3283 | 4652 | 1331 | 501 | 84 | 23 | 4 | 1 | 0 |
| 2007 | 3496 | 2687 | 3761 | 713 | 96 | 26 | 9 | 2 | 0 |
| 2008 | 2714 | 2862 | 2175 | 2152 | 144 | 28 | 10 | 4 | 1 |
| 2009 | 3684 | 2222 | 2321 | 1322 | 455 | 38 | 12 | 5 | 2 |
| 2010 | 4388 | 3016 | 1805 | 1499 | 401 | 111 | 17 | 6 | 3 |
| 2011 | 17087 | 3592 | 2453 | 1223 | 562 | 116 | 48 | 8 | 4 |
| 2012 | 15310 | 13992 | 2924 | 1720 | 540 | 182 | 53 | 23 | 5 |
| 2013 | 12965 | 12535 | 11398 | 2129 | 908 | 208 | 85 | 27 | 11 |
| 2014 | 10348 | 10615 | 10225 | 8447 | 1231 | 389 | 91 | 40 | 14 |
| 2015 | 7886 | 8473 | 8667 | 7721 | 5002 | 557 | 170 | 34 | 14 |
| 2016 | 9380 | 6456 | 6921 | 6526 | 4544 | 2195 | 222 | 65 | 14 |
| 2017 | 7927 | 7681 | 5272 | 5178 | 3675 | 2033 | 740 | 86 | 30 |
| 2018 | 10629 | 6489 | 6275 | 3928 | 2896 | 1598 | 666 | 220 | 37 |
| 2019 | 13755 | 8703 | 5302 | 4679 | 2122 | 1256 | 492 | 165 | 64 |
| 2020 | 8739 | 11265 | 7109 | 3989 | 2617 | 862 | 439 | 127 | 65 |
| 2021 | 15636 | 7154 | 9204 | 5382 | 2346 | 1210 | 324 | 146 | 60 |
| 2022 | 10860 | 12803 | 5845 | 6993 | 3295 | 1248 | 557 | 130 | 80 |
| 2023 | 12148 | 8891 | 10454 | 4383 | 4386 | 1843 | 640 | 255 | 93 |
| 2024 | 8347 | 9948 | 7254 | 7550 | 2767 | 2452 | 936 | 308 | 180 |
| 2025 | 7856 | 6834 | 8114 | 5137 | 4508 | 1586 | 1210 | 441 | 216 |