| Table 2. Estimated stock numbers. | ||||
| Time\Age | 0 | 1 | 2 | 3 |
| 1984 | 0 | 42033 | 8625 | 401 |
| 1984.25 | 0 | 28614 | 4566 | 221 |
| 1984.5 | 36468 | 19891 | 2633 | 126 |
| 1984.75 | 0 | 11301 | 1064 | 71 |
| 1985 | 0 | 19726 | 5376 | 387 |
| 1985.25 | 0 | 13346 | 2498 | 206 |
| 1985.5 | 25687 | 9466 | 1411 | 119 |
| 1985.75 | 0 | 5582 | 557 | 67 |
| 1986 | 0 | 13543 | 2694 | 214 |
| 1986.25 | 0 | 9146 | 1347 | 117 |
| 1986.5 | 43730 | 6588 | 812 | 70 |
| 1986.75 | 0 | 4104 | 381 | 41 |
| 1987 | 0 | 25059 | 2140 | 177 |
| 1987.25 | 0 | 17984 | 1073 | 96 |
| 1987.5 | 8934 | 13351 | 638 | 58 |
| 1987.75 | 0 | 8853 | 309 | 35 |
| 1988 | 0 | 4537 | 4749 | 127 |
| 1988.25 | 0 | 3396 | 2729 | 70 |
| 1988.5 | 39601 | 2640 | 1813 | 41 |
| 1988.75 | 0 | 1907 | 1051 | 25 |
| 1989 | 0 | 21758 | 1175 | 511 |
| 1989.25 | 0 | 15657 | 728 | 307 |
| 1989.5 | 41107 | 11373 | 465 | 189 |
| 1989.75 | 0 | 7506 | 250 | 118 |
| 1990 | 0 | 22024 | 4387 | 193 |
| 1990.25 | 0 | 15955 | 2469 | 115 |
| 1990.5 | 53394 | 11382 | 1416 | 69 |
| 1990.75 | 0 | 7656 | 751 | 42 |
| 1991 | 0 | 29099 | 4724 | 389 |
| 1991.25 | 0 | 20940 | 2645 | 215 |
| 1991.5 | 89993 | 15488 | 1562 | 121 |
| 1991.75 | 0 | 10687 | 840 | 75 |
| 1992 | 0 | 49796 | 6986 | 470 |
| 1992.25 | 0 | 35530 | 4255 | 297 |
| 1992.5 | 48106 | 25716 | 2786 | 193 |
| 1992.75 | 0 | 16761 | 1581 | 119 |
| 1993 | 0 | 25911 | 10266 | 938 |
| 1993.25 | 0 | 17994 | 5687 | 576 |
| 1993.5 | 42599 | 12580 | 3314 | 360 |
| 1993.75 | 0 | 7830 | 1616 | 217 |
| 1994 | 0 | 22355 | 4643 | 867 |
| 1994.25 | 0 | 15393 | 2739 | 507 |
| 1994.5 | 116447 | 10837 | 1689 | 302 |
| 1994.75 | 0 | 7234 | 937 | 184 |
| 1995 | 0 | 64893 | 4697 | 654 |
| 1995.25 | 0 | 47527 | 2892 | 430 |
| 1995.5 | 45299 | 34630 | 1812 | 285 |
| 1995.75 | 0 | 23346 | 1034 | 179 |
| 1996 | 0 | 23013 | 15151 | 719 |
| 1996.25 | 0 | 16921 | 9291 | 439 |
| 1996.5 | 98901 | 12329 | 5955 | 269 |
| 1996.75 | 0 | 8569 | 3484 | 166 |
| 1997 | 0 | 55695 | 5937 | 2216 |
| 1997.25 | 0 | 40756 | 3743 | 1393 |
| 1997.5 | 18658 | 31563 | 2412 | 879 |
| 1997.75 | 0 | 22336 | 1378 | 552 |
| 1998 | 0 | 10404 | 15579 | 1148 |
| 1998.25 | 0 | 7762 | 9792 | 693 |
| 1998.5 | 33780 | 5722 | 6255 | 417 |
| 1998.75 | 0 | 4218 | 3729 | 263 |
| 1999 | 0 | 19712 | 2990 | 2409 |
| 1999.25 | 0 | 14958 | 2008 | 1533 |
| 1999.5 | 82187 | 11263 | 1310 | 968 |
| 1999.75 | 0 | 8166 | 754 | 598 |
| 2000 | 0 | 48687 | 5732 | 774 |
| 2000.25 | 0 | 37496 | 3804 | 481 |
| 2000.5 | 22507 | 29436 | 2504 | 297 |
| 2000.75 | 0 | 21037 | 1550 | 188 |
| 2001 | 0 | 12053 | 13731 | 997 |
| 2001.25 | 0 | 8645 | 8573 | 629 |
| 2001.5 | 21575 | 6192 | 5436 | 396 |
| 2001.75 | 0 | 4433 | 3536 | 251 |
| 2002 | 0 | 12590 | 2982 | 2242 |
| 2002.25 | 0 | 9392 | 1869 | 1390 |
| 2002.5 | 18753 | 6800 | 1215 | 871 |
| 2002.75 | 0 | 4621 | 743 | 547 |
| 2003 | 0 | 9547 | 2927 | 740 |
| 2003.25 | 0 | 6581 | 1848 | 449 |
| 2003.5 | 7557 | 4532 | 1172 | 271 |
| 2003.75 | 0 | 3044 | 681 | 170 |
| 2004 | 0 | 4136 | 2033 | 462 |
| 2004.25 | 0 | 2972 | 1329 | 295 |
| 2004.5 | 6913 | 2242 | 884 | 189 |
| 2004.75 | 0 | 1553 | 542 | 120 |
| 2005 | 0 | 3878 | 1024 | 382 |
| 2005.25 | 0 | 2864 | 705 | 257 |
| 2005.5 | 28123 | 2132 | 484 | 172 |
| 2005.75 | 0 | 1617 | 327 | 112 |
| 2006 | 0 | 15894 | 1251 | 291 |
| 2006.25 | 0 | 11684 | 874 | 192 |
| 2006.5 | 19410 | 8711 | 593 | 124 |
| 2006.75 | 0 | 6447 | 360 | 78 |
| 2007 | 0 | 10904 | 4166 | 230 |
| 2007.25 | 0 | 8078 | 2746 | 153 |
| 2007.5 | 28438 | 5924 | 1802 | 102 |
| 2007.75 | 0 | 4363 | 1166 | 66 |
| 2008 | 0 | 16192 | 3332 | 833 |
| 2008.25 | 0 | 12266 | 2323 | 539 |
| 2008.5 | 40899 | 9245 | 1582 | 349 |
| 2008.75 | 0 | 7041 | 1016 | 220 |
| 2009 | 0 | 25906 | 5139 | 798 |
| 2009.25 | 0 | 19837 | 3432 | 500 |
| 2009.5 | 62657 | 15496 | 2254 | 310 |
| 2009.75 | 0 | 11828 | 1351 | 196 |
| 2010 | 0 | 37354 | 9125 | 972 |
| 2010.25 | 0 | 29692 | 6851 | 624 |
| 2010.5 | 5617 | 22399 | 4754 | 396 |
| 2010.75 | 0 | 15875 | 3000 | 250 |
| 2011 | 0 | 3213 | 11004 | 2032 |
| 2011.25 | 0 | 2392 | 7061 | 1293 |
| 2011.5 | 9653 | 1856 | 4792 | 829 |
| 2011.75 | 0 | 1391 | 3134 | 526 |
| 2012 | 0 | 5556 | 1039 | 2440 |
| 2012.25 | 0 | 4210 | 718 | 1636 |
| 2012.5 | 49388 | 3263 | 505 | 1096 |
| 2012.75 | 0 | 2542 | 342 | 713 |
| 2013 | 0 | 28176 | 1801 | 667 |
| 2013.25 | 0 | 21243 | 1268 | 427 |
| 2013.5 | 13908 | 15203 | 861 | 271 |
| 2013.75 | 0 | 10393 | 531 | 172 |
| 2014 | 0 | 7583 | 6434 | 383 |
| 2014.25 | 0 | 5472 | 4002 | 240 |
| 2014.5 | 87302 | 3936 | 2454 | 149 |
| 2014.75 | 0 | 2810 | 1389 | 91 |
| 2015 | 0 | 46791 | 1828 | 789 |
| 2015.25 | 0 | 32807 | 1160 | 495 |
| 2015.5 | 31892 | 22633 | 721 | 308 |
| 2015.75 | 0 | 14359 | 385 | 188 |
| 2016 | 0 | 16782 | 8654 | 309 |
| 2016.25 | 0 | 11509 | 5466 | 197 |
| 2016.5 | 57662 | 7642 | 3338 | 123 |
| 2016.75 | 0 | 4668 | 1832 | 75 |
| 2017 | 0 | 30523 | 2680 | 994 |
| 2017.25 | 0 | 20800 | 1689 | 628 |
| 2017.5 | 21241 | 14147 | 1048 | 391 |
| 2017.75 | 0 | 9174 | 578 | 241 |
| 2018 | 0 | 10874 | 5649 | 442 |
| 2018.25 | 0 | 7872 | 3504 | 272 |
| 2018.5 | 55779 | 5605 | 2104 | 164 |
| 2018.75 | 0 | 4159 | 1179 | 100 |
| 2019 | 0 | 28772 | 2916 | 660 |
| 2019.25 | 0 | 21321 | 2058 | 427 |
| 2019.5 | 79616 | 15637 | 1305 | 267 |
| 2019.75 | 0 | 11075 | 744 | 166 |