| Table 2. Estimated stock numbers. | ||||
| Time\Age | 0 | 1 | 2 | 3 |
| 1984 | 0 | 45248 | 10425 | 575 |
| 1984.25 | 0 | 30999 | 5777 | 330 |
| 1984.5 | 41620 | 21316 | 3286 | 191 |
| 1984.75 | 0 | 11831 | 1329 | 111 |
| 1985 | 0 | 22261 | 5738 | 554 |
| 1985.25 | 0 | 14936 | 2756 | 303 |
| 1985.5 | 28844 | 10598 | 1608 | 180 |
| 1985.75 | 0 | 6080 | 641 | 104 |
| 1986 | 0 | 15173 | 2989 | 292 |
| 1986.25 | 0 | 10379 | 1551 | 166 |
| 1986.5 | 54500 | 7552 | 952 | 102 |
| 1986.75 | 0 | 4779 | 466 | 62 |
| 1987 | 0 | 30595 | 2694 | 254 |
| 1987.25 | 0 | 21752 | 1443 | 145 |
| 1987.5 | 11906 | 15996 | 898 | 90 |
| 1987.75 | 0 | 10685 | 477 | 56 |
| 1988 | 0 | 6183 | 5820 | 226 |
| 1988.25 | 0 | 4582 | 3467 | 132 |
| 1988.5 | 49151 | 3501 | 2309 | 81 |
| 1988.75 | 0 | 2531 | 1396 | 50 |
| 1989 | 0 | 26933 | 1586 | 745 |
| 1989.25 | 0 | 19428 | 1023 | 462 |
| 1989.5 | 51484 | 14011 | 658 | 288 |
| 1989.75 | 0 | 9277 | 367 | 181 |
| 1990 | 0 | 27839 | 5609 | 309 |
| 1990.25 | 0 | 20071 | 3278 | 187 |
| 1990.5 | 62171 | 14199 | 1892 | 112 |
| 1990.75 | 0 | 9773 | 1083 | 71 |
| 1991 | 0 | 34025 | 6345 | 640 |
| 1991.25 | 0 | 24256 | 3649 | 374 |
| 1991.5 | 105139 | 17783 | 2216 | 224 |
| 1991.75 | 0 | 12378 | 1261 | 140 |
| 1992 | 0 | 58170 | 8296 | 785 |
| 1992.25 | 0 | 41305 | 5008 | 491 |
| 1992.5 | 55385 | 29854 | 3243 | 315 |
| 1992.75 | 0 | 19827 | 1896 | 198 |
| 1993 | 0 | 29990 | 12549 | 1218 |
| 1993.25 | 0 | 20942 | 7239 | 749 |
| 1993.5 | 47614 | 14742 | 4365 | 467 |
| 1993.75 | 0 | 9423 | 2276 | 287 |
| 1994 | 0 | 25295 | 5803 | 1332 |
| 1994.25 | 0 | 17552 | 3434 | 789 |
| 1994.5 | 142621 | 12513 | 2147 | 479 |
| 1994.75 | 0 | 8421 | 1220 | 297 |
| 1995 | 0 | 79308 | 5585 | 915 |
| 1995.25 | 0 | 57775 | 3479 | 589 |
| 1995.5 | 56617 | 41965 | 2189 | 381 |
| 1995.75 | 0 | 29131 | 1341 | 243 |
| 1996 | 0 | 29876 | 19471 | 988 |
| 1996.25 | 0 | 22033 | 12201 | 625 |
| 1996.5 | 114203 | 16116 | 7912 | 398 |
| 1996.75 | 0 | 11271 | 4721 | 249 |
| 1997 | 0 | 63718 | 7943 | 3101 |
| 1997.25 | 0 | 46604 | 5127 | 1963 |
| 1997.5 | 24831 | 35550 | 3364 | 1249 |
| 1997.75 | 0 | 24935 | 1970 | 788 |
| 1998 | 0 | 13805 | 17364 | 1682 |
| 1998.25 | 0 | 10281 | 10998 | 1044 |
| 1998.5 | 44298 | 7598 | 7036 | 648 |
| 1998.75 | 0 | 5569 | 4289 | 412 |
| 1999 | 0 | 25315 | 3966 | 2906 |
| 1999.25 | 0 | 19141 | 2666 | 1844 |
| 1999.5 | 99428 | 14393 | 1737 | 1158 |
| 1999.75 | 0 | 10370 | 1025 | 726 |
| 2000 | 0 | 57210 | 7365 | 1048 |
| 2000.25 | 0 | 43261 | 4975 | 658 |
| 2000.5 | 27084 | 33209 | 3330 | 411 |
| 2000.75 | 0 | 23753 | 2106 | 262 |
| 2001 | 0 | 14579 | 15508 | 1393 |
| 2001.25 | 0 | 10514 | 9693 | 884 |
| 2001.5 | 27139 | 7604 | 6154 | 562 |
| 2001.75 | 0 | 5518 | 4072 | 360 |
| 2002 | 0 | 15539 | 3761 | 2676 |
| 2002.25 | 0 | 11536 | 2395 | 1659 |
| 2002.5 | 21487 | 8386 | 1584 | 1039 |
| 2002.75 | 0 | 5752 | 973 | 654 |
| 2003 | 0 | 11195 | 3702 | 948 |
| 2003.25 | 0 | 7895 | 2390 | 586 |
| 2003.5 | 9200 | 5556 | 1543 | 362 |
| 2003.75 | 0 | 3804 | 929 | 229 |
| 2004 | 0 | 5013 | 2626 | 671 |
| 2004.25 | 0 | 3631 | 1735 | 425 |
| 2004.5 | 8757 | 2717 | 1152 | 270 |
| 2004.75 | 0 | 1919 | 723 | 172 |
| 2005 | 0 | 4871 | 1302 | 534 |
| 2005.25 | 0 | 3610 | 887 | 348 |
| 2005.5 | 32926 | 2690 | 603 | 227 |
| 2005.75 | 0 | 2034 | 408 | 147 |
| 2006 | 0 | 18379 | 1563 | 366 |
| 2006.25 | 0 | 13543 | 1083 | 237 |
| 2006.5 | 23435 | 10086 | 731 | 152 |
| 2006.75 | 0 | 7437 | 461 | 97 |
| 2007 | 0 | 13060 | 4898 | 322 |
| 2007.25 | 0 | 9762 | 3224 | 215 |
| 2007.5 | 35994 | 7246 | 2113 | 143 |
| 2007.75 | 0 | 5383 | 1389 | 93 |
| 2008 | 0 | 20170 | 4092 | 992 |
| 2008.25 | 0 | 15254 | 2817 | 639 |
| 2008.5 | 56140 | 11516 | 1901 | 411 |
| 2008.75 | 0 | 8729 | 1231 | 261 |
| 2009 | 0 | 33795 | 6408 | 969 |
| 2009.25 | 0 | 25530 | 4338 | 614 |
| 2009.5 | 79390 | 19663 | 2898 | 387 |
| 2009.75 | 0 | 14832 | 1745 | 245 |
| 2010 | 0 | 45968 | 11468 | 1287 |
| 2010.25 | 0 | 35430 | 8369 | 828 |
| 2010.5 | 7721 | 26326 | 5725 | 527 |
| 2010.75 | 0 | 18589 | 3641 | 335 |
| 2011 | 0 | 4352 | 12995 | 2551 |
| 2011.25 | 0 | 3244 | 8427 | 1621 |
| 2011.5 | 13105 | 2476 | 5654 | 1034 |
| 2011.75 | 0 | 1854 | 3733 | 661 |
| 2012 | 0 | 7422 | 1388 | 2928 |
| 2012.25 | 0 | 5598 | 953 | 1918 |
| 2012.5 | 62570 | 4274 | 660 | 1256 |
| 2012.75 | 0 | 3287 | 453 | 817 |
| 2013 | 0 | 35143 | 2270 | 795 |
| 2013.25 | 0 | 26304 | 1585 | 510 |
| 2013.5 | 17598 | 18923 | 1075 | 325 |
| 2013.75 | 0 | 13079 | 672 | 207 |
| 2014 | 0 | 9611 | 8064 | 485 |
| 2014.25 | 0 | 7056 | 5115 | 308 |
| 2014.5 | 102563 | 5175 | 3210 | 194 |
| 2014.75 | 0 | 3759 | 1894 | 122 |
| 2015 | 0 | 55303 | 2545 | 1158 |
| 2015.25 | 0 | 39666 | 1671 | 740 |
| 2015.5 | 41138 | 28060 | 1084 | 470 |
| 2015.75 | 0 | 18678 | 624 | 294 |
| 2016 | 0 | 22004 | 12158 | 544 |
| 2016.25 | 0 | 15688 | 7853 | 346 |
| 2016.5 | 91206 | 10911 | 4958 | 218 |
| 2016.75 | 0 | 7274 | 3015 | 137 |
| 2017 | 0 | 49954 | 4659 | 1854 |
| 2017.25 | 0 | 36444 | 3078 | 1195 |
| 2017.5 | 43238 | 26735 | 2003 | 764 |
| 2017.75 | 0 | 19683 | 1300 | 489 |