| Table 3. Estimated stock numbers at age. | |||||||||
| Year Age | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 
| 1984 | 64980 | 32732 | 22217 | 16710 | 9713 | 5219 | 1001 | 700 | 1653 | 
| 1985 | 51430 | 64957 | 26968 | 15449 | 8650 | 3571 | 1592 | 487 | 2446 | 
| 1986 | 43038 | 58653 | 44507 | 17482 | 7629 | 4077 | 1560 | 847 | 2048 | 
| 1987 | 29859 | 19975 | 46088 | 31164 | 10113 | 3352 | 1728 | 783 | 1544 | 
| 1988 | 32990 | 22249 | 13925 | 34997 | 18321 | 5790 | 1817 | 1092 | 1343 | 
| 1989 | 51062 | 30697 | 16874 | 9839 | 22169 | 8280 | 2531 | 975 | 1455 | 
| 1990 | 61118 | 44600 | 25811 | 11681 | 6203 | 12557 | 3843 | 1206 | 1539 | 
| 1991 | 44862 | 52154 | 35318 | 20465 | 9386 | 4770 | 8698 | 2329 | 2071 | 
| 1992 | 51229 | 47056 | 43629 | 28899 | 15976 | 6749 | 3074 | 5922 | 3101 | 
| 1993 | 42788 | 35151 | 45941 | 31309 | 20198 | 11398 | 4819 | 2222 | 6372 | 
| 1994 | 51365 | 29968 | 31634 | 39934 | 21529 | 13253 | 7282 | 2993 | 5883 | 
| 1995 | 58343 | 38837 | 26833 | 28083 | 28442 | 14375 | 8115 | 5222 | 5739 | 
| 1996 | 53367 | 51285 | 27872 | 19740 | 20405 | 16592 | 7354 | 4721 | 6340 | 
| 1997 | 71134 | 48235 | 36768 | 18557 | 13242 | 14407 | 9932 | 4522 | 6544 | 
| 1998 | 60048 | 51816 | 38091 | 22237 | 10707 | 6810 | 7456 | 5523 | 6075 | 
| 1999 | 41126 | 44191 | 35806 | 24418 | 12789 | 6158 | 3768 | 5215 | 6984 | 
| 2000 | 25572 | 37994 | 32621 | 22794 | 13514 | 6842 | 3519 | 2417 | 6893 | 
| 2001 | 20319 | 21993 | 26170 | 19148 | 11821 | 7332 | 3887 | 2220 | 5697 | 
| 2002 | 18779 | 15900 | 17032 | 16400 | 11439 | 6412 | 4197 | 2587 | 4252 | 
| 2003 | 18287 | 15904 | 12665 | 12430 | 9617 | 6289 | 3690 | 2679 | 3860 | 
| 2004 | 14643 | 14862 | 12728 | 10496 | 8519 | 5829 | 3510 | 2415 | 3682 | 
| 2005 | 12605 | 12555 | 12713 | 10351 | 7759 | 5427 | 3442 | 2158 | 3337 | 
| 2006 | 15080 | 11177 | 11758 | 9926 | 7884 | 5160 | 3512 | 2287 | 3161 | 
| 2007 | 16112 | 13341 | 11135 | 9631 | 6293 | 4405 | 2758 | 2026 | 2789 | 
| 2008 | 16988 | 13477 | 11804 | 8872 | 6350 | 3836 | 2548 | 1766 | 2525 | 
| 2009 | 14960 | 16560 | 11622 | 8752 | 5724 | 3781 | 2250 | 1478 | 2548 | 
| 2010 | 20731 | 13400 | 12780 | 9190 | 6356 | 3318 | 2379 | 1428 | 2647 | 
| 2011 | 21825 | 15167 | 11367 | 10169 | 5602 | 3647 | 1812 | 1377 | 2578 | 
| 2012 | 27391 | 17862 | 10950 | 7811 | 5893 | 3103 | 2012 | 1104 | 2473 | 
| 2013 | 27227 | 17270 | 13818 | 9034 | 5681 | 4118 | 2220 | 1270 | 2307 | 
| 2014 | 26237 | 19414 | 12397 | 10566 | 6989 | 4356 | 3082 | 1395 | 2378 | 
| 2015 | 27905 | 19988 | 15086 | 9128 | 7894 | 4617 | 2675 | 1812 | 2704 | 
| 2016 | 22530 | 23637 | 15262 | 11373 | 6705 | 5455 | 3023 | 1651 | 2741 | 
| 2017 | 23975 | 17486 | 15945 | 10227 | 7873 | 4196 | 2937 | 1561 | 2115 | 
| 2018 | 28754 | 19087 | 13641 | 10775 | 6913 | 4853 | 2202 | 1466 | 1627 | 
| 2019 | 23941 | 23375 | 15906 | 10722 | 7901 | 4890 | 3057 | 1095 | 1661 |