| Table 3. Estimated stock numbers at age. | |||||||
| Year Age | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
| 1999 | 52527 | 26949 | 7320 | 3730 | 2342 | 856 | 862 | 
| 2000 | 45618 | 41180 | 17101 | 3065 | 1065 | 851 | 624 | 
| 2001 | 29308 | 35684 | 25788 | 7039 | 830 | 356 | 494 | 
| 2002 | 33447 | 22888 | 22379 | 11199 | 2112 | 283 | 290 | 
| 2003 | 25408 | 26084 | 14178 | 9963 | 3762 | 785 | 213 | 
| 2004 | 29275 | 19901 | 16672 | 6688 | 3697 | 1520 | 403 | 
| 2005 | 24575 | 23041 | 13062 | 8089 | 2544 | 1541 | 802 | 
| 2006 | 22493 | 19385 | 15356 | 6410 | 3067 | 1056 | 972 | 
| 2007 | 22880 | 17762 | 12872 | 7343 | 2316 | 1234 | 816 | 
| 2008 | 23753 | 18056 | 11758 | 6086 | 2640 | 966 | 855 | 
| 2009 | 28656 | 18665 | 11722 | 5556 | 2235 | 1162 | 802 | 
| 2010 | 35161 | 22548 | 12265 | 5766 | 2227 | 1080 | 949 | 
| 2011 | 39058 | 27680 | 15047 | 6272 | 2509 | 1189 | 1083 | 
| 2012 | 35284 | 30749 | 18704 | 8019 | 2906 | 1417 | 1284 | 
| 2013 | 30420 | 27999 | 22306 | 11539 | 4593 | 1929 | 1792 | 
| 2014 | 30972 | 24217 | 20861 | 14588 | 7211 | 3273 | 2651 | 
| 2015 | 29896 | 24759 | 18504 | 14186 | 9567 | 5325 | 4374 | 
| 2016 | 30040 | 23914 | 19034 | 12678 | 9421 | 7148 | 7245 | 
| 2017 | 24820 | 23956 | 17986 | 12617 | 8193 | 6970 | 10648 |