| Table 3. Estimated stock numbers at age. | ||||||||||
| Year Age | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1994 | 1040 | 942 | 191 | 106 | 52 | 34 | 59 | 48 | 26 | 5 |
| 1995 | 1306 | 809 | 419 | 114 | 63 | 30 | 23 | 42 | 29 | 13 |
| 1996 | 646 | 1312 | 1154 | 370 | 90 | 60 | 25 | 24 | 44 | 18 |
| 1997 | 25 | 634 | 1006 | 895 | 320 | 82 | 51 | 20 | 14 | 63 |
| 1998 | 446 | 9 | 426 | 543 | 513 | 177 | 54 | 32 | 8 | 26 |
| 1999 | 944 | 402 | 5 | 243 | 287 | 156 | 44 | 7 | 5 | 3 |
| 2000 | 2455 | 893 | 283 | 9 | 163 | 170 | 73 | 13 | 1 | 2 |
| 2001 | 1053 | 1932 | 475 | 145 | 19 | 141 | 90 | 34 | 7 | 1 |
| 2002 | 1515 | 725 | 1148 | 312 | 78 | 45 | 157 | 42 | 10 | 3 |
| 2003 | 378 | 1438 | 510 | 633 | 192 | 80 | 80 | 119 | 10 | 16 |
| 2004 | 516 | 442 | 824 | 348 | 302 | 50 | 16 | 6 | 3 | 1 |
| 2005 | 496 | 411 | 211 | 311 | 148 | 44 | 4 | 0 | 0 | 0 |
| 2006 | 159 | 387 | 188 | 88 | 105 | 66 | 19 | 3 | 1 | 0 |
| 2007 | 26 | 149 | 240 | 83 | 45 | 30 | 11 | 2 | 1 | 0 |
| 2008 | 27 | 25 | 76 | 136 | 46 | 21 | 9 | 3 | 1 | 0 |
| 2009 | 29 | 39 | 23 | 38 | 75 | 25 | 17 | 5 | 1 | 0 |
| 2010 | 5 | 25 | 48 | 28 | 38 | 53 | 19 | 15 | 11 | 1 |
| 2011 | 5 | 2 | 21 | 55 | 30 | 52 | 62 | 22 | 11 | 12 |
| 2012 | 6 | 3 | 1 | 12 | 26 | 19 | 31 | 28 | 13 | 12 |
| 2013 | 6 | 5 | 2 | 1 | 11 | 18 | 13 | 17 | 10 | 11 |
| 2014 | 11 | 4 | 5 | 3 | 3 | 12 | 17 | 10 | 14 | 14 |
| 2015 | 46 | 8 | 2 | 2 | 1 | 3 | 11 | 12 | 7 | 19 |
| 2016 | 177 | 28 | 10 | 1 | 1 | 1 | 1 | 6 | 5 | 22 |
| 2017 | 383 | 107 | 31 | 7 | 0 | 0 | 1 | 1 | 5 | 18 |
| 2018 | 55 | 376 | 86 | 30 | 5 | 1 | 1 | 1 | 0 | 18 |
| 2019 | 203 | 55 | 345 | 78 | 14 | 1 | 1 | 1 | 1 | 18 |
| 2020 | 36 | 251 | 63 | 191 | 37 | 6 | 1 | 0 | 0 | 8 |
| 2021 | 121 | 31 | 206 | 96 | 124 | 20 | 2 | 0 | 0 | 5 |
| 2022 | 161 | 145 | 64 | 221 | 201 | 131 | 15 | 4 | 0 | 10 |
| 2023 | 390 | 96 | 155 | 179 | 419 | 389 | 116 | 13 | 1 | 8 |
| 2024 | 816 | 266 | 87 | 114 | 221 | 369 | 242 | 49 | 2 | 7 |
| 2025 | 277 | 857 | 185 | 69 | 75 | 162 | 273 | 161 | 23 | 8 |