| Table 2. Estimated stock numbers. | ||||
| Time\Age | 0 | 1 | 2 | 3 |
| 1984 | 0 | 43094 | 9515 | 400 |
| 1984.25 | 0 | 29536 | 5149 | 223 |
| 1984.5 | 39328 | 20289 | 2845 | 125 |
| 1984.75 | 0 | 11172 | 1070 | 70 |
| 1985 | 0 | 20879 | 5236 | 377 |
| 1985.25 | 0 | 13917 | 2448 | 197 |
| 1985.5 | 25995 | 9874 | 1420 | 115 |
| 1985.75 | 0 | 5566 | 528 | 65 |
| 1986 | 0 | 13587 | 2615 | 201 |
| 1986.25 | 0 | 9202 | 1314 | 109 |
| 1986.5 | 51422 | 6665 | 801 | 66 |
| 1986.75 | 0 | 4134 | 370 | 39 |
| 1987 | 0 | 28522 | 2247 | 177 |
| 1987.25 | 0 | 20034 | 1156 | 97 |
| 1987.5 | 10650 | 14718 | 710 | 59 |
| 1987.75 | 0 | 9689 | 356 | 36 |
| 1988 | 0 | 5499 | 4846 | 137 |
| 1988.25 | 0 | 4014 | 2815 | 78 |
| 1988.5 | 43493 | 3035 | 1854 | 48 |
| 1988.75 | 0 | 2152 | 1083 | 29 |
| 1989 | 0 | 23691 | 1296 | 519 |
| 1989.25 | 0 | 16981 | 808 | 313 |
| 1989.5 | 44964 | 12149 | 501 | 189 |
| 1989.75 | 0 | 7855 | 259 | 116 |
| 1990 | 0 | 24170 | 4527 | 191 |
| 1990.25 | 0 | 17183 | 2545 | 111 |
| 1990.5 | 56957 | 11966 | 1396 | 64 |
| 1990.75 | 0 | 8067 | 755 | 39 |
| 1991 | 0 | 31069 | 5048 | 400 |
| 1991.25 | 0 | 21912 | 2772 | 223 |
| 1991.5 | 93070 | 15929 | 1624 | 129 |
| 1991.75 | 0 | 10913 | 883 | 80 |
| 1992 | 0 | 51218 | 7149 | 507 |
| 1992.25 | 0 | 36047 | 4195 | 304 |
| 1992.5 | 49615 | 25881 | 2662 | 190 |
| 1992.75 | 0 | 16969 | 1482 | 117 |
| 1993 | 0 | 26866 | 10493 | 862 |
| 1993.25 | 0 | 18706 | 5911 | 516 |
| 1993.5 | 42409 | 13157 | 3493 | 316 |
| 1993.75 | 0 | 8274 | 1709 | 190 |
| 1994 | 0 | 22538 | 4919 | 900 |
| 1994.25 | 0 | 15487 | 2825 | 520 |
| 1994.5 | 125023 | 10965 | 1740 | 312 |
| 1994.75 | 0 | 7214 | 937 | 190 |
| 1995 | 0 | 69176 | 4680 | 647 |
| 1995.25 | 0 | 50046 | 2845 | 407 |
| 1995.5 | 48916 | 36144 | 1750 | 258 |
| 1995.75 | 0 | 24906 | 1035 | 162 |
| 1996 | 0 | 25969 | 16445 | 708 |
| 1996.25 | 0 | 19027 | 10204 | 436 |
| 1996.5 | 102916 | 13863 | 6550 | 271 |
| 1996.75 | 0 | 9520 | 3747 | 168 |
| 1997 | 0 | 57301 | 6599 | 2358 |
| 1997.25 | 0 | 41937 | 4209 | 1475 |
| 1997.5 | 21845 | 31838 | 2740 | 933 |
| 1997.75 | 0 | 22052 | 1544 | 580 |
| 1998 | 0 | 12125 | 15180 | 1258 |
| 1998.25 | 0 | 8994 | 9617 | 771 |
| 1998.5 | 38451 | 6629 | 6157 | 473 |
| 1998.75 | 0 | 4791 | 3680 | 298 |
| 1999 | 0 | 21789 | 3359 | 2391 |
| 1999.25 | 0 | 16331 | 2230 | 1513 |
| 1999.5 | 89933 | 12146 | 1432 | 944 |
| 1999.75 | 0 | 8537 | 813 | 583 |
| 2000 | 0 | 51282 | 5882 | 813 |
| 2000.25 | 0 | 38602 | 3888 | 508 |
| 2000.5 | 23589 | 29412 | 2545 | 316 |
| 2000.75 | 0 | 20958 | 1568 | 200 |
| 2001 | 0 | 12710 | 13520 | 983 |
| 2001.25 | 0 | 9165 | 8464 | 615 |
| 2001.5 | 24011 | 6632 | 5399 | 387 |
| 2001.75 | 0 | 4798 | 3555 | 247 |
| 2002 | 0 | 13630 | 3228 | 2227 |
| 2002.25 | 0 | 10063 | 2036 | 1380 |
| 2002.5 | 18659 | 7315 | 1335 | 866 |
| 2002.75 | 0 | 4986 | 797 | 541 |
| 2003 | 0 | 9785 | 3158 | 760 |
| 2003.25 | 0 | 6946 | 2035 | 471 |
| 2003.5 | 8079 | 4923 | 1314 | 292 |
| 2003.75 | 0 | 3370 | 780 | 183 |
| 2004 | 0 | 4418 | 2309 | 553 |
| 2004.25 | 0 | 3219 | 1523 | 351 |
| 2004.5 | 7729 | 2408 | 1011 | 224 |
| 2004.75 | 0 | 1706 | 630 | 142 |
| 2005 | 0 | 4295 | 1156 | 454 |
| 2005.25 | 0 | 3192 | 787 | 297 |
| 2005.5 | 29561 | 2380 | 535 | 194 |
| 2005.75 | 0 | 1797 | 362 | 126 |
| 2006 | 0 | 16524 | 1373 | 323 |
| 2006.25 | 0 | 12220 | 934 | 209 |
| 2006.5 | 20930 | 9105 | 620 | 133 |
| 2006.75 | 0 | 6709 | 379 | 84 |
| 2007 | 0 | 11652 | 4334 | 250 |
| 2007.25 | 0 | 8725 | 2887 | 164 |
| 2007.5 | 31003 | 6490 | 1912 | 107 |
| 2007.75 | 0 | 4833 | 1261 | 69 |
| 2008 | 0 | 17345 | 3667 | 894 |
| 2008.25 | 0 | 13075 | 2519 | 575 |
| 2008.5 | 50187 | 9824 | 1697 | 369 |
| 2008.75 | 0 | 7366 | 1092 | 234 |
| 2009 | 0 | 29845 | 5370 | 859 |
| 2009.25 | 0 | 22551 | 3615 | 545 |
| 2009.5 | 71260 | 17292 | 2396 | 343 |
| 2009.75 | 0 | 12888 | 1412 | 216 |
| 2010 | 0 | 41018 | 9879 | 1045 |
| 2010.25 | 0 | 31465 | 7132 | 671 |
| 2010.5 | 6803 | 23383 | 4843 | 425 |
| 2010.75 | 0 | 16584 | 3014 | 269 |
| 2011 | 0 | 3839 | 11674 | 2085 |
| 2011.25 | 0 | 2872 | 7671 | 1337 |
| 2011.5 | 11409 | 2187 | 5178 | 860 |
| 2011.75 | 0 | 1634 | 3406 | 549 |
| 2012 | 0 | 6452 | 1215 | 2617 |
| 2012.25 | 0 | 4858 | 832 | 1717 |
| 2012.5 | 53020 | 3690 | 574 | 1125 |
| 2012.75 | 0 | 2813 | 389 | 728 |
| 2013 | 0 | 29661 | 1886 | 686 |
| 2013.25 | 0 | 22109 | 1306 | 440 |
| 2013.5 | 14140 | 15916 | 877 | 280 |
| 2013.75 | 0 | 10966 | 536 | 177 |
| 2014 | 0 | 7703 | 6466 | 373 |
| 2014.25 | 0 | 5630 | 4130 | 237 |
| 2014.5 | 85274 | 4101 | 2599 | 149 |
| 2014.75 | 0 | 2898 | 1480 | 93 |
| 2015 | 0 | 46114 | 1871 | 853 |
| 2015.25 | 0 | 33211 | 1219 | 540 |
| 2015.5 | 34097 | 23601 | 778 | 339 |
| 2015.75 | 0 | 15609 | 426 | 209 |
| 2016 | 0 | 18338 | 10004 | 364 |
| 2016.25 | 0 | 13145 | 6516 | 233 |
| 2016.5 | 79343 | 9203 | 4123 | 146 |
| 2016.75 | 0 | 6150 | 2447 | 91 |
| 2017 | 0 | 43597 | 3892 | 1439 |
| 2017.25 | 0 | 31949 | 2582 | 928 |
| 2017.5 | 37204 | 23478 | 1680 | 592 |
| 2017.75 | 0 | 17245 | 1082 | 378 |