| Table 2. Estimated stock numbers. | ||||
| Time\Age | 0 | 1 | 2 | 3 |
| 1984 | 0 | 43249 | 9336 | 410 |
| 1984.25 | 0 | 29602 | 5063 | 228 |
| 1984.5 | 38818 | 20390 | 2839 | 128 |
| 1984.75 | 0 | 11284 | 1085 | 72 |
| 1985 | 0 | 20781 | 5323 | 390 |
| 1985.25 | 0 | 13927 | 2488 | 206 |
| 1985.5 | 26058 | 9877 | 1432 | 120 |
| 1985.75 | 0 | 5636 | 539 | 67 |
| 1986 | 0 | 13677 | 2674 | 208 |
| 1986.25 | 0 | 9274 | 1344 | 114 |
| 1986.5 | 49357 | 6724 | 817 | 69 |
| 1986.75 | 0 | 4185 | 379 | 41 |
| 1987 | 0 | 27753 | 2253 | 182 |
| 1987.25 | 0 | 19662 | 1152 | 100 |
| 1987.5 | 9936 | 14485 | 701 | 61 |
| 1987.75 | 0 | 9558 | 349 | 37 |
| 1988 | 0 | 5106 | 4876 | 137 |
| 1988.25 | 0 | 3780 | 2834 | 77 |
| 1988.5 | 42848 | 2898 | 1882 | 47 |
| 1988.75 | 0 | 2082 | 1105 | 29 |
| 1989 | 0 | 23422 | 1268 | 537 |
| 1989.25 | 0 | 16805 | 798 | 325 |
| 1989.5 | 43959 | 12068 | 502 | 197 |
| 1989.75 | 0 | 7851 | 263 | 121 |
| 1990 | 0 | 23626 | 4547 | 199 |
| 1990.25 | 0 | 16922 | 2559 | 117 |
| 1990.5 | 55480 | 11867 | 1419 | 68 |
| 1990.75 | 0 | 8014 | 764 | 42 |
| 1991 | 0 | 30268 | 5014 | 407 |
| 1991.25 | 0 | 21485 | 2769 | 226 |
| 1991.5 | 93783 | 15742 | 1623 | 129 |
| 1991.75 | 0 | 10852 | 883 | 80 |
| 1992 | 0 | 51743 | 7152 | 506 |
| 1992.25 | 0 | 36559 | 4265 | 310 |
| 1992.5 | 49731 | 26316 | 2750 | 197 |
| 1992.75 | 0 | 17207 | 1552 | 121 |
| 1993 | 0 | 26900 | 10604 | 919 |
| 1993.25 | 0 | 18683 | 5934 | 557 |
| 1993.5 | 42942 | 13095 | 3489 | 344 |
| 1993.75 | 0 | 8199 | 1705 | 207 |
| 1994 | 0 | 22709 | 4872 | 907 |
| 1994.25 | 0 | 15564 | 2831 | 526 |
| 1994.5 | 124603 | 10986 | 1749 | 315 |
| 1994.75 | 0 | 7270 | 956 | 192 |
| 1995 | 0 | 69168 | 4720 | 668 |
| 1995.25 | 0 | 50231 | 2882 | 429 |
| 1995.5 | 48165 | 36358 | 1782 | 277 |
| 1995.75 | 0 | 24884 | 1048 | 174 |
| 1996 | 0 | 25166 | 16312 | 729 |
| 1996.25 | 0 | 18508 | 10067 | 448 |
| 1996.5 | 102801 | 13488 | 6464 | 277 |
| 1996.75 | 0 | 9326 | 3740 | 172 |
| 1997 | 0 | 57416 | 6493 | 2379 |
| 1997.25 | 0 | 41953 | 4135 | 1492 |
| 1997.5 | 20733 | 32170 | 2685 | 943 |
| 1997.75 | 0 | 22482 | 1523 | 588 |
| 1998 | 0 | 11572 | 15593 | 1255 |
| 1998.25 | 0 | 8633 | 9839 | 765 |
| 1998.5 | 36955 | 6377 | 6287 | 466 |
| 1998.75 | 0 | 4666 | 3764 | 294 |
| 1999 | 0 | 21213 | 3303 | 2461 |
| 1999.25 | 0 | 16006 | 2211 | 1562 |
| 1999.5 | 88721 | 11987 | 1430 | 978 |
| 1999.75 | 0 | 8537 | 816 | 603 |
| 2000 | 0 | 51308 | 5951 | 822 |
| 2000.25 | 0 | 38922 | 3954 | 513 |
| 2000.5 | 23572 | 30045 | 2598 | 318 |
| 2000.75 | 0 | 21465 | 1610 | 201 |
| 2001 | 0 | 12675 | 13886 | 1024 |
| 2001.25 | 0 | 9125 | 8651 | 643 |
| 2001.5 | 23781 | 6582 | 5489 | 405 |
| 2001.75 | 0 | 4753 | 3627 | 258 |
| 2002 | 0 | 13668 | 3206 | 2301 |
| 2002.25 | 0 | 10138 | 2019 | 1425 |
| 2002.5 | 19083 | 7340 | 1324 | 894 |
| 2002.75 | 0 | 4989 | 801 | 559 |
| 2003 | 0 | 9877 | 3162 | 776 |
| 2003.25 | 0 | 6923 | 2023 | 477 |
| 2003.5 | 7910 | 4840 | 1296 | 293 |
| 2003.75 | 0 | 3285 | 764 | 183 |
| 2004 | 0 | 4332 | 2245 | 534 |
| 2004.25 | 0 | 3142 | 1479 | 339 |
| 2004.5 | 7463 | 2364 | 982 | 216 |
| 2004.75 | 0 | 1667 | 610 | 137 |
| 2005 | 0 | 4171 | 1124 | 437 |
| 2005.25 | 0 | 3098 | 770 | 289 |
| 2005.5 | 29400 | 2314 | 526 | 190 |
| 2005.75 | 0 | 1755 | 356 | 124 |
| 2006 | 0 | 16467 | 1353 | 317 |
| 2006.25 | 0 | 12152 | 933 | 206 |
| 2006.5 | 20636 | 9081 | 624 | 132 |
| 2006.75 | 0 | 6728 | 380 | 83 |
| 2007 | 0 | 11531 | 4371 | 250 |
| 2007.25 | 0 | 8629 | 2899 | 164 |
| 2007.5 | 30385 | 6410 | 1914 | 108 |
| 2007.75 | 0 | 4771 | 1257 | 70 |
| 2008 | 0 | 17102 | 3643 | 894 |
| 2008.25 | 0 | 12963 | 2521 | 576 |
| 2008.5 | 47176 | 9802 | 1707 | 371 |
| 2008.75 | 0 | 7429 | 1096 | 234 |
| 2009 | 0 | 28852 | 5418 | 860 |
| 2009.25 | 0 | 21894 | 3641 | 542 |
| 2009.5 | 69738 | 16979 | 2405 | 339 |
| 2009.75 | 0 | 12850 | 1414 | 213 |
| 2010 | 0 | 40710 | 9949 | 1037 |
| 2010.25 | 0 | 31648 | 7342 | 665 |
| 2010.5 | 6339 | 23619 | 5040 | 421 |
| 2010.75 | 0 | 16723 | 3145 | 265 |
| 2011 | 0 | 3611 | 11673 | 2154 |
| 2011.25 | 0 | 2708 | 7574 | 1377 |
| 2011.5 | 10789 | 2090 | 5114 | 884 |
| 2011.75 | 0 | 1569 | 3359 | 563 |
| 2012 | 0 | 6157 | 1175 | 2615 |
| 2012.25 | 0 | 4654 | 809 | 1729 |
| 2012.5 | 53238 | 3571 | 562 | 1143 |
| 2012.75 | 0 | 2760 | 384 | 741 |
| 2013 | 0 | 30015 | 1893 | 697 |
| 2013.25 | 0 | 22488 | 1325 | 446 |
| 2013.5 | 14118 | 16123 | 896 | 283 |
| 2013.75 | 0 | 11045 | 549 | 179 |
| 2014 | 0 | 7696 | 6615 | 385 |
| 2014.25 | 0 | 5603 | 4160 | 243 |
| 2014.5 | 86227 | 4072 | 2581 | 152 |
| 2014.75 | 0 | 2897 | 1451 | 94 |
| 2015 | 0 | 46317 | 1879 | 835 |
| 2015.25 | 0 | 32928 | 1210 | 527 |
| 2015.5 | 32512 | 23074 | 764 | 329 |
| 2015.75 | 0 | 14950 | 407 | 201 |
| 2016 | 0 | 17329 | 9372 | 342 |
| 2016.25 | 0 | 12188 | 5999 | 218 |
| 2016.5 | 67050 | 8327 | 3726 | 137 |
| 2016.75 | 0 | 5322 | 2096 | 84 |
| 2017 | 0 | 36368 | 3244 | 1208 |
| 2017.25 | 0 | 25752 | 2111 | 769 |
| 2017.5 | 21801 | 18195 | 1360 | 485 |
| 2017.75 | 0 | 12710 | 815 | 305 |
| 2018 | 0 | 11365 | 8594 | 664 |
| 2018.25 | 0 | 8283 | 5726 | 430 |
| 2018.5 | 80801 | 5946 | 3735 | 275 |
| 2018.75 | 0 | 4341 | 2344 | 174 |