| Table 2a. Lower bound of estimated stock numbers. | ||||||||
| Year\Age | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7+ | 
| 1994 | 60250 | 29064 | 10735 | 16868 | 2532 | 165 | 30 | 26 | 
| 1995 | 74380 | 32167 | 25237 | 5121 | 5350 | 889 | 71 | 14 | 
| 1996 | 109807 | 35796 | 35803 | 13397 | 1110 | 1663 | 199 | 12 | 
| 1997 | 120052 | 61867 | 9499 | 21420 | 2902 | 381 | 380 | 62 | 
| 1998 | 51217 | 79671 | 37122 | 3596 | 5226 | 760 | 119 | 96 | 
| 1999 | 47064 | 23998 | 53174 | 14535 | 1102 | 1214 | 224 | 69 | 
| 2000 | 45112 | 25267 | 16627 | 21951 | 3375 | 205 | 292 | 61 | 
| 2001 | 39108 | 24847 | 20403 | 7086 | 4689 | 857 | 56 | 86 | 
| 2002 | 28950 | 21787 | 16241 | 8256 | 1604 | 963 | 255 | 31 | 
| 2003 | 48467 | 13429 | 26210 | 6336 | 1765 | 348 | 234 | 67 | 
| 2004 | 20865 | 34373 | 7500 | 12476 | 1685 | 403 | 119 | 82 | 
| 2005 | 17216 | 10277 | 28461 | 2899 | 3209 | 396 | 98 | 47 | 
| 2006 | 5722 | 11795 | 9142 | 14787 | 904 | 779 | 102 | 29 | 
| 2007 | 3193 | 3058 | 9994 | 4739 | 4303 | 443 | 256 | 38 | 
| 2008 | 15367 | 1372 | 2771 | 4535 | 1602 | 1040 | 175 | 94 | 
| 2009 | 12271 | 10144 | 2076 | 2119 | 1507 | 552 | 243 | 74 | 
| 2010 | 14046 | 6405 | 11210 | 1839 | 888 | 412 | 131 | 66 | 
| 2011 | 13990 | 6751 | 4254 | 6680 | 1112 | 286 | 86 | 41 | 
| 2012 | 30069 | 6810 | 5347 | 2526 | 2474 | 496 | 81 | 25 | 
| 2013 | 18669 | 17356 | 4146 | 3224 | 959 | 674 | 177 | 37 | 
| 2014 | 9173 | 6978 | 10053 | 1681 | 688 | 169 | 121 | 33 |