| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 2000 | 848 | 362 | 182 | 141 | 8 | 1 | 0 | 0 | 0 |
| 2001 | 1349 | 694 | 295 | 91 | 27 | 3 | 0 | 0 | 0 |
| 2002 | 1303 | 1104 | 559 | 146 | 17 | 8 | 1 | 0 | 0 |
| 2003 | 1508 | 1067 | 830 | 273 | 27 | 5 | 4 | 1 | 0 |
| 2004 | 2084 | 1234 | 836 | 417 | 43 | 7 | 2 | 2 | 0 |
| 2005 | 5490 | 1706 | 884 | 421 | 73 | 12 | 3 | 1 | 0 |
| 2006 | 3575 | 4496 | 1149 | 457 | 79 | 21 | 5 | 2 | 0 |
| 2007 | 3368 | 2927 | 2938 | 620 | 93 | 24 | 9 | 3 | 0 |
| 2008 | 2735 | 2758 | 2039 | 1679 | 139 | 28 | 11 | 5 | 1 |
| 2009 | 3432 | 2239 | 2154 | 1239 | 399 | 39 | 12 | 6 | 3 |
| 2010 | 4363 | 2810 | 1780 | 1389 | 406 | 110 | 18 | 7 | 5 |
| 2011 | 15753 | 3572 | 2290 | 1203 | 544 | 130 | 50 | 9 | 6 |
| 2012 | 15478 | 12899 | 2913 | 1599 | 542 | 191 | 61 | 18 | 7 |
| 2013 | 13735 | 12673 | 10426 | 2120 | 849 | 224 | 94 | 39 | 12 |
| 2014 | 10986 | 11245 | 10336 | 7722 | 1230 | 379 | 105 | 49 | 21 |
| 2015 | 8198 | 8995 | 9197 | 7824 | 4586 | 565 | 174 | 26 | 12 |
| 2016 | 9793 | 6711 | 7358 | 6942 | 4613 | 2043 | 230 | 69 | 11 |
| 2017 | 7676 | 8018 | 5482 | 5515 | 3864 | 2088 | 744 | 109 | 40 |
| 2018 | 10540 | 6284 | 6554 | 4093 | 3043 | 1663 | 726 | 216 | 50 |
| 2019 | 13599 | 8630 | 5139 | 4891 | 2200 | 1287 | 538 | 154 | 50 |
| 2020 | 9068 | 11137 | 7048 | 3867 | 2723 | 881 | 462 | 117 | 57 |
| 2021 | 17096 | 7424 | 9089 | 5342 | 2259 | 1248 | 348 | 173 | 52 |
| 2022 | 11525 | 14000 | 6077 | 6918 | 3270 | 1186 | 593 | 175 | 98 |
| 2023 | 11813 | 9435 | 11431 | 4569 | 4323 | 1815 | 612 | 322 | 145 |
| 2024 | 8251 | 9673 | 7629 | 8274 | 2876 | 2387 | 908 | 313 | 313 |
| 2025 | 7689 | 6756 | 7816 | 5410 | 4969 | 1629 | 1154 | 414 | 296 |