| Table 3. Estimated stock numbers at age. | |||||||
| Year Age | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
| 1981 | 10306 | 19821 | 6992 | 1961 | 457 | 58 | 49 | 
| 1982 | 23813 | 5207 | 7779 | 2556 | 713 | 178 | 38 | 
| 1983 | 14107 | 11870 | 2192 | 2753 | 887 | 252 | 71 | 
| 1984 | 23773 | 6547 | 4652 | 766 | 879 | 293 | 97 | 
| 1985 | 10499 | 11418 | 2409 | 1467 | 231 | 255 | 109 | 
| 1986 | 20628 | 4615 | 4113 | 733 | 379 | 66 | 92 | 
| 1987 | 44491 | 10119 | 1736 | 1304 | 216 | 106 | 44 | 
| 1988 | 7191 | 19591 | 3702 | 524 | 351 | 62 | 41 | 
| 1989 | 21022 | 3044 | 6391 | 1131 | 155 | 98 | 29 | 
| 1990 | 8184 | 9452 | 1041 | 1711 | 323 | 44 | 33 | 
| 1991 | 11776 | 3451 | 3342 | 344 | 474 | 102 | 23 | 
| 1992 | 21250 | 5032 | 1086 | 1016 | 110 | 130 | 35 | 
| 1993 | 7623 | 9350 | 1709 | 300 | 289 | 34 | 48 | 
| 1994 | 14013 | 3428 | 3256 | 488 | 90 | 85 | 24 | 
| 1995 | 10165 | 6078 | 1240 | 1008 | 138 | 27 | 30 | 
| 1996 | 4237 | 4471 | 1922 | 366 | 294 | 41 | 16 | 
| 1997 | 16893 | 1841 | 1422 | 505 | 105 | 87 | 15 | 
| 1998 | 5532 | 7487 | 557 | 372 | 139 | 31 | 28 | 
| 1999 | 4211 | 2218 | 2194 | 141 | 102 | 42 | 17 | 
| 2000 | 14258 | 1764 | 643 | 560 | 38 | 29 | 17 | 
| 2001 | 4144 | 5927 | 556 | 174 | 160 | 11 | 13 | 
| 2002 | 6894 | 1700 | 1851 | 147 | 43 | 43 | 6 | 
| 2003 | 2313 | 2772 | 494 | 499 | 40 | 11 | 12 | 
| 2004 | 3165 | 909 | 771 | 115 | 129 | 11 | 6 | 
| 2005 | 2197 | 1229 | 259 | 194 | 30 | 31 | 4 | 
| 2006 | 7140 | 877 | 401 | 60 | 46 | 7 | 8 | 
| 2007 | 2552 | 3061 | 286 | 106 | 13 | 11 | 3 | 
| 2008 | 1788 | 995 | 1057 | 72 | 26 | 3 | 3 | 
| 2009 | 5582 | 734 | 338 | 254 | 16 | 6 | 1 | 
| 2010 | 6290 | 2411 | 262 | 79 | 53 | 3 | 2 | 
| 2011 | 2578 | 2740 | 883 | 62 | 17 | 13 | 1 | 
| 2012 | 4322 | 1129 | 1092 | 214 | 13 | 4 | 3 | 
| 2013 | 7774 | 1850 | 496 | 336 | 50 | 3 | 2 | 
| 2014 | 5978 | 3463 | 785 | 166 | 94 | 13 | 1 | 
| 2015 | 5676 | 2626 | 1536 | 251 | 51 | 29 | 4 | 
| 2016 | 2431 | 2654 | 1149 | 545 | 76 | 16 | 10 | 
| 2017 | 1982 | 1072 | 1269 | 407 | 175 | 24 | 8 | 
| 2018 | 1414 | 902 | 446 | 429 | 119 | 53 | 9 | 
| 2019 | 2928 | 602 | 379 | 137 | 115 | 32 | 17 |