| Table 3. Estimated stock numbers at age. | ||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 2000 | 145 | 122 | 97 | 6 | 1 | 0 | 0 | 0 |
| 2001 | 243 | 117 | 58 | 20 | 2 | 0 | 0 | 0 |
| 2002 | 299 | 196 | 56 | 12 | 7 | 1 | 0 | 0 |
| 2003 | 242 | 240 | 96 | 13 | 5 | 4 | 1 | 0 |
| 2004 | 467 | 194 | 126 | 28 | 4 | 2 | 2 | 0 |
| 2005 | 991 | 374 | 90 | 36 | 9 | 2 | 1 | 0 |
| 2006 | 2513 | 793 | 159 | 22 | 13 | 5 | 1 | 0 |
| 2007 | 3098 | 2013 | 291 | 31 | 8 | 7 | 2 | 0 |
| 2008 | 2749 | 2491 | 782 | 18 | 11 | 4 | 3 | 1 |
| 2009 | 1349 | 2218 | 1206 | 100 | 5 | 5 | 2 | 1 |
| 2010 | 2805 | 1091 | 1282 | 347 | 24 | 2 | 3 | 1 |
| 2011 | 2284 | 2275 | 697 | 504 | 82 | 11 | 1 | 1 |
| 2012 | 3026 | 1857 | 1481 | 283 | 123 | 33 | 5 | 1 |
| 2013 | 3741 | 2463 | 1232 | 629 | 79 | 47 | 16 | 2 |
| 2014 | 5190 | 3052 | 1663 | 606 | 179 | 28 | 20 | 6 |
| 2015 | 5139 | 4238 | 2197 | 799 | 220 | 65 | 12 | 10 |
| 2016 | 5704 | 4199 | 3116 | 1051 | 280 | 80 | 26 | 8 |
| 2017 | 6896 | 4661 | 3154 | 1548 | 419 | 110 | 31 | 14 |
| 2018 | 5546 | 5637 | 3560 | 1806 | 710 | 152 | 39 | 17 |
| 2019 | 5816 | 4534 | 4286 | 1973 | 749 | 201 | 44 | 18 |
| 2020 | 6569 | 4756 | 3398 | 2312 | 675 | 202 | 50 | 20 |
| 2021 | 4341 | 5372 | 3545 | 1895 | 963 | 206 | 52 | 23 |
| 2022 | 6649 | 3551 | 4068 | 2119 | 1009 | 405 | 70 | 27 |
| 2023 | 2933 | 5439 | 2729 | 2466 | 1190 | 471 | 151 | 38 |
| 2024 | 1651 | 2399 | 4089 | 1668 | 1268 | 528 | 190 | 80 |
| 2025 | 1078 | 1350 | 1815 | 2418 | 895 | 492 | 198 | 94 |