| Table 3. Estimated stock numbers at age. | |||||||
| Year Age | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 2000 | 123 | 82 | 6 | 1 | 0 | 0 | 0 |
| 2001 | 129 | 62 | 16 | 2 | 0 | 0 | 0 |
| 2002 | 196 | 65 | 13 | 5 | 1 | 0 | 0 |
| 2003 | 222 | 101 | 15 | 4 | 3 | 0 | 0 |
| 2004 | 186 | 118 | 27 | 5 | 2 | 1 | 0 |
| 2005 | 327 | 95 | 33 | 9 | 2 | 1 | 0 |
| 2006 | 686 | 163 | 25 | 11 | 4 | 1 | 0 |
| 2007 | 1315 | 336 | 41 | 8 | 5 | 2 | 0 |
| 2008 | 2196 | 662 | 73 | 14 | 4 | 3 | 1 |
| 2009 | 2100 | 1206 | 149 | 20 | 6 | 2 | 1 |
| 2010 | 1311 | 1248 | 378 | 40 | 9 | 3 | 1 |
| 2011 | 1934 | 828 | 469 | 100 | 16 | 4 | 1 |
| 2012 | 2047 | 1264 | 331 | 125 | 38 | 7 | 2 |
| 2013 | 2394 | 1376 | 539 | 96 | 46 | 17 | 3 |
| 2014 | 3130 | 1651 | 647 | 161 | 33 | 19 | 7 |
| 2015 | 4057 | 2234 | 789 | 222 | 56 | 13 | 9 |
| 2016 | 4090 | 2954 | 1080 | 278 | 77 | 22 | 8 |
| 2017 | 4353 | 3027 | 1476 | 415 | 100 | 29 | 11 |
| 2018 | 5378 | 3260 | 1642 | 618 | 142 | 35 | 14 |
| 2019 | 4312 | 4042 | 1754 | 662 | 188 | 44 | 16 |
| 2020 | 4810 | 3237 | 2177 | 667 | 201 | 54 | 20 |
| 2021 | 5066 | 3619 | 1794 | 933 | 219 | 58 | 24 |
| 2022 | 3727 | 3837 | 2112 | 893 | 366 | 71 | 28 |
| 2023 | 4887 | 2840 | 2273 | 1113 | 376 | 126 | 35 |
| 2024 | 2507 | 3709 | 1685 | 1158 | 458 | 135 | 58 |
| 2025 | 1773 | 1909 | 2175 | 868 | 442 | 160 | 63 |