| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1994 | 89539 | 39220 | 38560 | 36880 | 17465 | 9601 | 5132 | 1095 | 2436 |
| 1995 | 105623 | 44537 | 23719 | 24717 | 22113 | 9220 | 4603 | 2515 | 1761 |
| 1996 | 128843 | 54394 | 26641 | 15063 | 14469 | 10875 | 4008 | 1911 | 1827 |
| 1997 | 114540 | 64705 | 31897 | 16101 | 8335 | 6847 | 4635 | 1617 | 1558 |
| 1998 | 109760 | 57043 | 38714 | 18628 | 8268 | 3636 | 2681 | 1771 | 1268 |
| 1999 | 98756 | 54812 | 33784 | 21144 | 8243 | 3206 | 1524 | 1147 | 1411 |
| 2000 | 85341 | 50898 | 32584 | 19265 | 10312 | 3499 | 1435 | 689 | 1246 |
| 2001 | 80867 | 45023 | 31299 | 19460 | 10267 | 5121 | 1761 | 743 | 1101 |
| 2002 | 85376 | 44558 | 28007 | 19780 | 11106 | 5371 | 2684 | 919 | 985 |
| 2003 | 78945 | 46782 | 28173 | 17424 | 11412 | 5700 | 2701 | 1363 | 933 |
| 2004 | 72011 | 42106 | 29010 | 17629 | 9997 | 5811 | 2707 | 1275 | 1040 |
| 2005 | 58114 | 38988 | 25923 | 18854 | 10560 | 5005 | 2503 | 1080 | 816 |
| 2006 | 59889 | 32784 | 24604 | 16817 | 11544 | 5624 | 2300 | 1077 | 662 |
| 2007 | 67854 | 32939 | 20703 | 15816 | 9944 | 6279 | 2632 | 1003 | 570 |
| 2008 | 69561 | 39386 | 20871 | 13150 | 9548 | 5604 | 3412 | 1374 | 703 |
| 2009 | 68351 | 39133 | 25706 | 13498 | 7885 | 5390 | 3140 | 1945 | 1030 |
| 2010 | 67915 | 37604 | 24794 | 17225 | 8390 | 4621 | 3194 | 1921 | 1722 |
| 2011 | 79653 | 38829 | 24032 | 16140 | 10622 | 4738 | 2543 | 1838 | 2005 |
| 2012 | 75349 | 44888 | 24892 | 15854 | 10203 | 6313 | 2716 | 1451 | 2144 |
| 2013 | 78565 | 39617 | 28514 | 16160 | 10093 | 6278 | 3848 | 1685 | 2161 |
| 2014 | 82737 | 42534 | 24179 | 18781 | 10697 | 6459 | 3919 | 2458 | 2417 |
| 2015 | 79913 | 44555 | 26596 | 15625 | 12344 | 6884 | 4050 | 2468 | 2998 |
| 2016 | 74451 | 43398 | 27694 | 16858 | 9810 | 7375 | 3997 | 2257 | 2965 |
| 2017 | 69953 | 40003 | 26457 | 17301 | 10329 | 5585 | 3779 | 1945 | 2437 |
| 2018 | 68863 | 38771 | 24279 | 15580 | 9818 | 5138 | 2535 | 1558 | 1834 |
| 2019 | 54355 | 40080 | 23956 | 15359 | 9447 | 5367 | 2481 | 1161 | 1642 |
| 2020 | 43753 | 29412 | 25246 | 15049 | 9210 | 4987 | 2512 | 1015 | 1308 |