| Table 3. Estimated stock numbers at age. | ||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 
| 1994 | 36847 | 36606 | 37204 | 17812 | 10079 | 4678 | 1126 | 1742 | 
| 1995 | 41656 | 22549 | 23729 | 21334 | 9179 | 4787 | 2386 | 1293 | 
| 1996 | 54098 | 24596 | 14514 | 14122 | 10242 | 3713 | 1891 | 1360 | 
| 1997 | 68647 | 30701 | 14471 | 8037 | 7043 | 4307 | 1562 | 1268 | 
| 1998 | 59479 | 42531 | 17749 | 7779 | 3415 | 2619 | 1549 | 907 | 
| 1999 | 52087 | 34472 | 22967 | 7973 | 3122 | 1576 | 1228 | 1002 | 
| 2000 | 49821 | 30923 | 19490 | 10949 | 3464 | 1462 | 728 | 944 | 
| 2001 | 43689 | 31397 | 18069 | 9707 | 5443 | 1740 | 738 | 939 | 
| 2002 | 44923 | 26691 | 19988 | 10274 | 4968 | 2900 | 928 | 816 | 
| 2003 | 43359 | 29460 | 16021 | 11993 | 5256 | 2529 | 1487 | 733 | 
| 2004 | 39294 | 28966 | 18049 | 10275 | 5823 | 2569 | 1180 | 1021 | 
| 2005 | 41033 | 23656 | 19090 | 12264 | 5106 | 2621 | 1078 | 868 | 
| 2006 | 36619 | 25744 | 15191 | 11746 | 6853 | 2517 | 1265 | 717 | 
| 2007 | 32409 | 24294 | 15870 | 9212 | 6495 | 2691 | 1241 | 687 | 
| 2008 | 40376 | 21039 | 13900 | 10101 | 5412 | 3517 | 1379 | 950 | 
| 2009 | 39870 | 28118 | 13549 | 7944 | 5615 | 3130 | 2181 | 1153 | 
| 2010 | 40342 | 25662 | 19714 | 8297 | 4563 | 3396 | 1871 | 2108 | 
| 2011 | 37335 | 26241 | 16183 | 11850 | 4564 | 2614 | 1922 | 2200 | 
| 2012 | 48115 | 24831 | 15481 | 10600 | 6822 | 2690 | 1352 | 2386 | 
| 2013 | 33449 | 29179 | 16444 | 10695 | 6777 | 4191 | 1733 | 2110 | 
| 2014 | 39047 | 19556 | 20184 | 10668 | 6849 | 4211 | 2745 | 2271 | 
| 2015 | 41123 | 25624 | 13113 | 13206 | 6801 | 4036 | 2801 | 2945 | 
| 2016 | 44710 | 23785 | 17768 | 8434 | 7860 | 4215 | 2311 | 3097 | 
| 2017 | 46379 | 24489 | 16221 | 10674 | 5168 | 3777 | 2153 | 2400 | 
| 2018 | 37193 | 28123 | 14494 | 10155 | 5533 | 2584 | 1719 | 1926 | 
| 2019 | 47667 | 21760 | 17281 | 9639 | 5887 | 2580 | 1332 | 1699 | 
| 2020 | 43724 | 30810 | 15197 | 9752 | 5454 | 2978 | 1173 | 1374 |