| Table 3. Estimated stock numbers at age. | ||||||||
| Year Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
| 1994 | 194922 | 64220 | 18312 | 30291 | 4462 | 217 | 25 | 20 | 
| 1995 | 61215 | 91060 | 44963 | 8426 | 9123 | 1400 | 65 | 8 | 
| 1996 | 184078 | 25495 | 67932 | 20936 | 1875 | 2413 | 259 | 9 | 
| 1997 | 247278 | 84981 | 12031 | 34810 | 4802 | 567 | 541 | 81 | 
| 1998 | 86864 | 116231 | 55622 | 5441 | 8526 | 1225 | 160 | 148 | 
| 1999 | 86211 | 37692 | 79367 | 23569 | 1590 | 2021 | 315 | 94 | 
| 2000 | 56895 | 39272 | 25538 | 33024 | 5289 | 295 | 404 | 80 | 
| 2001 | 91084 | 24814 | 27672 | 10095 | 7065 | 1343 | 65 | 110 | 
| 2002 | 30253 | 42328 | 18175 | 11292 | 2069 | 1477 | 336 | 32 | 
| 2003 | 140428 | 14028 | 33892 | 7571 | 2276 | 495 | 335 | 91 | 
| 2004 | 51511 | 69346 | 10488 | 16604 | 2145 | 557 | 149 | 116 | 
| 2005 | 49783 | 23032 | 54106 | 4893 | 4724 | 563 | 128 | 67 | 
| 2006 | 16731 | 24372 | 15504 | 24426 | 1652 | 1285 | 145 | 40 | 
| 2007 | 7738 | 7327 | 16377 | 7625 | 7374 | 739 | 429 | 59 | 
| 2008 | 65148 | 3462 | 5348 | 6901 | 2555 | 1816 | 284 | 167 | 
| 2009 | 26138 | 28429 | 4155 | 3703 | 2124 | 810 | 399 | 123 | 
| 2010 | 39314 | 11568 | 21814 | 3096 | 1498 | 613 | 201 | 120 | 
| 2011 | 27361 | 16364 | 8262 | 11882 | 1647 | 516 | 128 | 71 | 
| 2012 | 66243 | 11746 | 11154 | 4619 | 4531 | 748 | 141 | 40 | 
| 2013 | 40723 | 28366 | 8113 | 5875 | 1699 | 1398 | 255 | 63 | 
| 2014 | 25275 | 17297 | 19614 | 3842 | 1765 | 333 | 290 | 56 | 
| 2015 | 7273 | 10626 | 11330 | 9438 | 1235 | 482 | 83 | 102 | 
| 2016 | 159542 | 3316 | 7048 | 4908 | 3070 | 385 | 137 | 61 | 
| 2017 | 4010 | 80306 | 2790 | 3971 | 1815 | 961 | 132 | 72 | 
| 2018 | 4010 | 1809 | 65581 | 2065 | 2023 | 836 | 415 | 88 |