| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 2000 | 1230 | 412 | 196 | 89 | 8 | 1 | 0 | 0 | 0 |
| 2001 | 1595 | 1007 | 337 | 106 | 11 | 2 | 0 | 0 | 0 |
| 2002 | 1739 | 1306 | 812 | 181 | 14 | 3 | 1 | 0 | 0 |
| 2003 | 1337 | 1424 | 990 | 432 | 24 | 4 | 1 | 0 | 0 |
| 2004 | 1484 | 1095 | 1127 | 532 | 49 | 6 | 1 | 1 | 0 |
| 2005 | 3774 | 1215 | 768 | 606 | 63 | 13 | 2 | 1 | 0 |
| 2006 | 2950 | 3090 | 767 | 424 | 86 | 18 | 5 | 1 | 0 |
| 2007 | 3019 | 2415 | 1783 | 439 | 89 | 26 | 8 | 2 | 0 |
| 2008 | 2701 | 2472 | 1597 | 1060 | 112 | 29 | 11 | 4 | 1 |
| 2009 | 3466 | 2211 | 1921 | 988 | 296 | 36 | 13 | 6 | 2 |
| 2010 | 4307 | 2838 | 1755 | 1251 | 324 | 96 | 17 | 6 | 3 |
| 2011 | 16917 | 3525 | 2314 | 1192 | 481 | 109 | 44 | 8 | 4 |
| 2012 | 15932 | 13851 | 2876 | 1624 | 516 | 170 | 51 | 21 | 6 |
| 2013 | 13542 | 13044 | 11205 | 2096 | 864 | 201 | 82 | 26 | 11 |
| 2014 | 10997 | 11088 | 10639 | 8310 | 1211 | 386 | 89 | 38 | 14 |
| 2015 | 8171 | 9004 | 9068 | 8050 | 4909 | 557 | 173 | 31 | 13 |
| 2016 | 9680 | 6689 | 7365 | 6845 | 4716 | 2152 | 227 | 65 | 13 |
| 2017 | 8496 | 7926 | 5465 | 5525 | 3822 | 2086 | 755 | 89 | 30 |
| 2018 | 11499 | 6955 | 6478 | 4085 | 3048 | 1623 | 690 | 229 | 38 |
| 2019 | 14542 | 9416 | 5688 | 4843 | 2191 | 1262 | 495 | 173 | 65 |
| 2020 | 9211 | 11909 | 7691 | 4294 | 2675 | 837 | 435 | 129 | 67 |
| 2021 | 16741 | 7540 | 9721 | 5849 | 2519 | 1159 | 314 | 147 | 62 |
| 2022 | 11822 | 13708 | 6172 | 7414 | 3615 | 1298 | 527 | 130 | 82 |
| 2023 | 12543 | 9679 | 11192 | 4646 | 4672 | 2024 | 665 | 246 | 95 |
| 2024 | 8072 | 10271 | 7828 | 8124 | 2938 | 2631 | 1040 | 328 | 180 |
| 2025 | 7536 | 6609 | 8306 | 5581 | 4901 | 1679 | 1337 | 510 | 230 |