| Table 2. Estimated stock numbers. | ||||
| Time\Age | 0 | 1 | 2 | 3 |
| 1984 | 0 | 45418 | 9841 | 587 |
| 1984.25 | 0 | 30992 | 5435 | 335 |
| 1984.5 | 39828 | 21460 | 3204 | 195 |
| 1984.75 | 0 | 12223 | 1378 | 113 |
| 1985 | 0 | 21706 | 6043 | 591 |
| 1985.25 | 0 | 14739 | 2874 | 326 |
| 1985.5 | 28852 | 10429 | 1635 | 191 |
| 1985.75 | 0 | 6207 | 676 | 110 |
| 1986 | 0 | 15307 | 3126 | 308 |
| 1986.25 | 0 | 10462 | 1610 | 176 |
| 1986.5 | 48118 | 7596 | 978 | 107 |
| 1986.75 | 0 | 4830 | 480 | 64 |
| 1987 | 0 | 27909 | 2651 | 259 |
| 1987.25 | 0 | 20198 | 1393 | 147 |
| 1987.5 | 10305 | 14957 | 850 | 90 |
| 1987.75 | 0 | 10031 | 440 | 56 |
| 1988 | 0 | 5238 | 5655 | 213 |
| 1988.25 | 0 | 3985 | 3347 | 120 |
| 1988.5 | 45875 | 3133 | 2257 | 72 |
| 1988.75 | 0 | 2320 | 1370 | 44 |
| 1989 | 0 | 25365 | 1493 | 745 |
| 1989.25 | 0 | 18424 | 975 | 465 |
| 1989.5 | 48210 | 13468 | 648 | 295 |
| 1989.75 | 0 | 9054 | 373 | 189 |
| 1990 | 0 | 25964 | 5517 | 328 |
| 1990.25 | 0 | 19071 | 3243 | 200 |
| 1990.5 | 59287 | 13717 | 1924 | 123 |
| 1990.75 | 0 | 9446 | 1093 | 78 |
| 1991 | 0 | 32379 | 6092 | 645 |
| 1991.25 | 0 | 23407 | 3568 | 375 |
| 1991.5 | 103944 | 17378 | 2189 | 223 |
| 1991.75 | 0 | 12173 | 1233 | 141 |
| 1992 | 0 | 57887 | 8186 | 758 |
| 1992.25 | 0 | 41686 | 5108 | 498 |
| 1992.5 | 55225 | 30415 | 3407 | 334 |
| 1992.75 | 0 | 20171 | 2043 | 211 |
| 1993 | 0 | 29760 | 12724 | 1353 |
| 1993.25 | 0 | 20755 | 7260 | 847 |
| 1993.5 | 47957 | 14537 | 4339 | 537 |
| 1993.75 | 0 | 9173 | 2244 | 329 |
| 1994 | 0 | 25058 | 5586 | 1315 |
| 1994.25 | 0 | 17412 | 3373 | 779 |
| 1994.5 | 135636 | 12372 | 2112 | 470 |
| 1994.75 | 0 | 8443 | 1229 | 290 |
| 1995 | 0 | 75986 | 5617 | 932 |
| 1995.25 | 0 | 55996 | 3548 | 625 |
| 1995.5 | 53682 | 40960 | 2268 | 422 |
| 1995.75 | 0 | 28000 | 1370 | 269 |
| 1996 | 0 | 27170 | 18463 | 1041 |
| 1996.25 | 0 | 20169 | 11468 | 665 |
| 1996.5 | 111405 | 14785 | 7454 | 425 |
| 1996.75 | 0 | 10491 | 4543 | 267 |
| 1997 | 0 | 62779 | 7451 | 3052 |
| 1997.25 | 0 | 45829 | 4786 | 1948 |
| 1997.5 | 22050 | 35702 | 3136 | 1244 |
| 1997.75 | 0 | 25515 | 1860 | 792 |
| 1998 | 0 | 12322 | 18017 | 1631 |
| 1998.25 | 0 | 9236 | 11282 | 1004 |
| 1998.5 | 39760 | 6830 | 7168 | 617 |
| 1998.75 | 0 | 5124 | 4378 | 394 |
| 1999 | 0 | 23415 | 3710 | 2984 |
| 1999.25 | 0 | 17965 | 2533 | 1902 |
| 1999.5 | 92692 | 13690 | 1672 | 1203 |
| 1999.75 | 0 | 10177 | 998 | 755 |
| 2000 | 0 | 55285 | 7410 | 1037 |
| 2000.25 | 0 | 42652 | 5076 | 647 |
| 2000.5 | 26375 | 33673 | 3449 | 402 |
| 2000.75 | 0 | 24127 | 2201 | 257 |
| 2001 | 0 | 14135 | 15826 | 1487 |
| 2001.25 | 0 | 10158 | 9773 | 953 |
| 2001.5 | 25226 | 7292 | 6115 | 608 |
| 2001.75 | 0 | 5286 | 4051 | 388 |
| 2002 | 0 | 14879 | 3639 | 2733 |
| 2002.25 | 0 | 11172 | 2310 | 1687 |
| 2002.5 | 21846 | 8091 | 1525 | 1051 |
| 2002.75 | 0 | 5530 | 956 | 664 |
| 2003 | 0 | 11073 | 3559 | 948 |
| 2003.25 | 0 | 7610 | 2261 | 574 |
| 2003.5 | 8755 | 5218 | 1438 | 347 |
| 2003.75 | 0 | 3511 | 850 | 219 |
| 2004 | 0 | 4776 | 2390 | 592 |
| 2004.25 | 0 | 3413 | 1571 | 376 |
| 2004.5 | 8001 | 2579 | 1046 | 239 |
| 2004.75 | 0 | 1789 | 649 | 152 |
| 2005 | 0 | 4493 | 1192 | 473 |
| 2005.25 | 0 | 3305 | 820 | 315 |
| 2005.5 | 31817 | 2457 | 562 | 209 |
| 2005.75 | 0 | 1863 | 380 | 137 |
| 2006 | 0 | 17942 | 1450 | 340 |
| 2006.25 | 0 | 13136 | 1036 | 225 |
| 2006.5 | 22316 | 9811 | 718 | 146 |
| 2006.75 | 0 | 7274 | 456 | 93 |
| 2007 | 0 | 12565 | 4815 | 318 |
| 2007.25 | 0 | 9298 | 3117 | 219 |
| 2007.5 | 33637 | 6815 | 2009 | 151 |
| 2007.75 | 0 | 5012 | 1300 | 98 |
| 2008 | 0 | 19216 | 3844 | 942 |
| 2008.25 | 0 | 14642 | 2688 | 611 |
| 2008.5 | 47797 | 11134 | 1832 | 398 |
| 2008.75 | 0 | 8616 | 1189 | 250 |
| 2009 | 0 | 30639 | 6352 | 934 |
| 2009.25 | 0 | 23387 | 4301 | 587 |
| 2009.5 | 72117 | 18352 | 2870 | 366 |
| 2009.75 | 0 | 14123 | 1742 | 233 |
| 2010 | 0 | 43277 | 11021 | 1258 |
| 2010.25 | 0 | 34543 | 8389 | 813 |
| 2010.5 | 6610 | 25988 | 5844 | 520 |
| 2010.75 | 0 | 18240 | 3770 | 330 |
| 2011 | 0 | 3777 | 12503 | 2607 |
| 2011.25 | 0 | 2801 | 7877 | 1635 |
| 2011.5 | 11423 | 2182 | 5297 | 1034 |
| 2011.75 | 0 | 1640 | 3496 | 659 |
| 2012 | 0 | 6589 | 1239 | 2815 |
| 2012.25 | 0 | 5000 | 856 | 1877 |
| 2012.5 | 59222 | 3903 | 604 | 1253 |
| 2012.75 | 0 | 3084 | 420 | 824 |
| 2013 | 0 | 34006 | 2228 | 802 |
| 2013.25 | 0 | 25851 | 1590 | 515 |
| 2013.5 | 17237 | 18528 | 1094 | 328 |
| 2013.75 | 0 | 12741 | 688 | 209 |
| 2014 | 0 | 9454 | 8057 | 506 |
| 2014.25 | 0 | 6892 | 4990 | 318 |
| 2014.5 | 104612 | 5028 | 3062 | 198 |
| 2014.75 | 0 | 3721 | 1795 | 123 |
| 2015 | 0 | 56036 | 2551 | 1092 |
| 2015.25 | 0 | 39259 | 1650 | 699 |
| 2015.5 | 39531 | 27066 | 1055 | 445 |
| 2015.75 | 0 | 17268 | 592 | 277 |
| 2016 | 0 | 20826 | 10675 | 495 |
| 2016.25 | 0 | 14329 | 6675 | 314 |
| 2016.5 | 69380 | 9538 | 4062 | 196 |
| 2016.75 | 0 | 5920 | 2334 | 121 |
| 2017 | 0 | 36724 | 3526 | 1369 |
| 2017.25 | 0 | 24829 | 2250 | 865 |
| 2017.5 | 24700 | 16821 | 1434 | 541 |
| 2017.75 | 0 | 11000 | 845 | 341 |
| 2018 | 0 | 12470 | 6970 | 694 |
| 2018.25 | 0 | 8920 | 4279 | 419 |
| 2018.5 | 68546 | 6284 | 2571 | 249 |
| 2018.75 | 0 | 4651 | 1496 | 153 |
| 2019 | 0 | 35366 | 3302 | 896 |
| 2019.25 | 0 | 26465 | 2326 | 579 |
| 2019.5 | 94591 | 19377 | 1495 | 365 |
| 2019.75 | 0 | 13851 | 887 | 229 |