| Table 3. Estimated stock numbers at age. | ||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
| 1999 | 1991304 | 286127 | 92860 | 37005 | 17591 | 14766 | 10296 | 2536 | 
| 2000 | 1753550 | 587379 | 110067 | 31276 | 11556 | 4488 | 3066 | 2010 | 
| 2001 | 1339280 | 515165 | 228394 | 38403 | 9800 | 2802 | 875 | 628 | 
| 2002 | 1219995 | 389551 | 199854 | 82415 | 12557 | 2086 | 362 | 87 | 
| 2003 | 953077 | 359143 | 152075 | 78664 | 32390 | 3706 | 407 | 32 | 
| 2004 | 807039 | 279082 | 138465 | 56453 | 34620 | 11405 | 886 | 61 | 
| 2005 | 704660 | 230176 | 99039 | 37269 | 16363 | 12145 | 3192 | 176 | 
| 2006 | 759105 | 206057 | 80771 | 27567 | 10419 | 4906 | 3921 | 698 | 
| 2007 | 924978 | 219402 | 81332 | 33174 | 9829 | 3329 | 1204 | 706 | 
| 2008 | 1101976 | 271540 | 82363 | 26021 | 7415 | 1670 | 391 | 160 | 
| 2009 | 1302290 | 324353 | 107693 | 32128 | 8508 | 2144 | 413 | 116 | 
| 2010 | 647512 | 391884 | 130469 | 44523 | 11182 | 2462 | 525 | 115 | 
| 2011 | 640425 | 191111 | 164232 | 56036 | 16959 | 3611 | 701 | 160 | 
| 2012 | 570910 | 189736 | 78825 | 75863 | 24216 | 6161 | 1144 | 239 | 
| 2013 | 1380300 | 164063 | 78000 | 35462 | 35442 | 9881 | 2116 | 425 | 
| 2014 | 559906 | 423674 | 66612 | 35076 | 16132 | 14618 | 3315 | 749 | 
| 2015 | 568878 | 165187 | 180448 | 30245 | 15753 | 6124 | 4802 | 1135 | 
| 2016 | 386504 | 166887 | 67071 | 76007 | 12271 | 5374 | 1709 | 1353 | 
| 2017 | 299681 | 112040 | 64792 | 25080 | 25388 | 3517 | 1224 | 554 | 
| 2018 | 566120 | 85346 | 44210 | 25219 | 8846 | 7379 | 853 | 344 | 
| 2019 | 399563 | 169368 | 34067 | 17821 | 9360 | 2721 | 1797 | 239 |