| Table 2. Estimated stock numbers. | ||||
| Time\Age | 0 | 1 | 2 | 3 |
| 1984 | 0 | 30785 | 5063 | 95 |
| 1984.25 | 0 | 21569 | 2929 | 35 |
| 1984.5 | 17653 | 15100 | 1698 | 10 |
| 1984.75 | 0 | 7801 | 487 | 0 |
| 1985 | 0 | 9554 | 3464 | 86 |
| 1985.25 | 0 | 7094 | 1502 | 25 |
| 1985.5 | 15302 | 5421 | 906 | 9 |
| 1985.75 | 0 | 3097 | 260 | 0 |
| 1986 | 0 | 7936 | 1433 | 52 |
| 1986.25 | 0 | 5507 | 629 | 16 |
| 1986.5 | 25332 | 4198 | 364 | 6 |
| 1986.75 | 0 | 2456 | 114 | 0 |
| 1987 | 0 | 15857 | 1125 | 23 |
| 1987.25 | 0 | 12067 | 531 | 7 |
| 1987.5 | 5331 | 9382 | 336 | 3 |
| 1987.75 | 0 | 6323 | 155 | 0 |
| 1988 | 0 | 2376 | 2873 | 22 |
| 1988.25 | 0 | 1977 | 1430 | 7 |
| 1988.5 | 28995 | 1725 | 959 | 3 |
| 1988.75 | 0 | 1362 | 494 | 0 |
| 1989 | 0 | 16189 | 841 | 144 |
| 1989.25 | 0 | 11487 | 545 | 67 |
| 1989.5 | 24179 | 8120 | 343 | 26 |
| 1989.75 | 0 | 4980 | 159 | 2 |
| 1990 | 0 | 12098 | 2415 | 41 |
| 1990.25 | 0 | 9910 | 1392 | 17 |
| 1990.5 | 35829 | 7550 | 768 | 6 |
| 1990.75 | 0 | 5469 | 419 | 1 |
| 1991 | 0 | 19285 | 3457 | 168 |
| 1991.25 | 0 | 13568 | 1689 | 69 |
| 1991.5 | 68485 | 10087 | 873 | 26 |
| 1991.75 | 0 | 6844 | 403 | 2 |
| 1992 | 0 | 37987 | 4139 | 123 |
| 1992.25 | 0 | 26612 | 2204 | 49 |
| 1992.5 | 37383 | 19283 | 1331 | 18 |
| 1992.75 | 0 | 12321 | 656 | 1 |
| 1993 | 0 | 19213 | 6908 | 227 |
| 1993.25 | 0 | 12469 | 3354 | 100 |
| 1993.5 | 29606 | 8129 | 1719 | 37 |
| 1993.75 | 0 | 4628 | 600 | 1 |
| 1994 | 0 | 14568 | 2065 | 93 |
| 1994.25 | 0 | 9643 | 1157 | 37 |
| 1994.5 | 76050 | 6871 | 699 | 14 |
| 1994.75 | 0 | 4136 | 259 | 0 |
| 1995 | 0 | 43416 | 2379 | 86 |
| 1995.25 | 0 | 30020 | 1267 | 42 |
| 1995.5 | 34626 | 20435 | 657 | 16 |
| 1995.75 | 0 | 12800 | 332 | 2 |
| 1996 | 0 | 16933 | 7115 | 144 |
| 1996.25 | 0 | 12948 | 3950 | 76 |
| 1996.5 | 67020 | 9618 | 2348 | 37 |
| 1996.75 | 0 | 6380 | 983 | 2 |
| 1997 | 0 | 38976 | 4325 | 389 |
| 1997.25 | 0 | 26611 | 2692 | 227 |
| 1997.5 | 18368 | 21065 | 1728 | 130 |
| 1997.75 | 0 | 14483 | 861 | 13 |
| 1998 | 0 | 9093 | 9580 | 394 |
| 1998.25 | 0 | 6370 | 5428 | 214 |
| 1998.5 | 28862 | 4326 | 3131 | 106 |
| 1998.75 | 0 | 3003 | 1500 | 16 |
| 1999 | 0 | 17150 | 1910 | 655 |
| 1999.25 | 0 | 13367 | 1371 | 387 |
| 1999.5 | 74405 | 10409 | 892 | 198 |
| 1999.75 | 0 | 7556 | 463 | 28 |
| 2000 | 0 | 46685 | 5479 | 218 |
| 2000.25 | 0 | 34556 | 3037 | 126 |
| 2000.5 | 19313 | 27557 | 1628 | 66 |
| 2000.75 | 0 | 19486 | 953 | 15 |
| 2001 | 0 | 10408 | 11852 | 440 |
| 2001.25 | 0 | 7464 | 6479 | 254 |
| 2001.5 | 19388 | 5354 | 3673 | 138 |
| 2001.75 | 0 | 3579 | 2140 | 54 |
| 2002 | 0 | 11252 | 2237 | 975 |
| 2002.25 | 0 | 7922 | 1164 | 517 |
| 2002.5 | 13776 | 5092 | 665 | 275 |
| 2002.75 | 0 | 3241 | 401 | 38 |
| 2003 | 0 | 6981 | 1909 | 194 |
| 2003.25 | 0 | 4901 | 1060 | 111 |
| 2003.5 | 5512 | 3415 | 577 | 60 |
| 2003.75 | 0 | 2023 | 292 | 9 |
| 2004 | 0 | 2910 | 1317 | 125 |
| 2004.25 | 0 | 2181 | 799 | 75 |
| 2004.5 | 5010 | 1846 | 484 | 45 |
| 2004.75 | 0 | 1133 | 254 | 11 |
| 2005 | 0 | 2830 | 653 | 104 |
| 2005.25 | 0 | 2045 | 421 | 69 |
| 2005.5 | 11235 | 1505 | 269 | 45 |
| 2005.75 | 0 | 1095 | 161 | 29 |
| 2006 | 0 | 7108 | 840 | 107 |
| 2006.25 | 0 | 6153 | 616 | 67 |
| 2006.5 | 10273 | 5465 | 431 | 39 |
| 2006.75 | 0 | 3866 | 232 | 14 |
| 2007 | 0 | 5885 | 2070 | 79 |
| 2007.25 | 0 | 4510 | 1252 | 50 |
| 2007.5 | 18569 | 3337 | 755 | 32 |
| 2007.75 | 0 | 2378 | 407 | 18 |
| 2008 | 0 | 10414 | 1834 | 243 |
| 2008.25 | 0 | 7221 | 1210 | 139 |
| 2008.5 | 20641 | 4973 | 760 | 78 |
| 2008.75 | 0 | 3498 | 425 | 34 |
| 2009 | 0 | 13493 | 2152 | 259 |
| 2009.25 | 0 | 8759 | 1233 | 158 |
| 2009.5 | 34771 | 6038 | 669 | 92 |
| 2009.75 | 0 | 4425 | 297 | 19 |
| 2010 | 0 | 21309 | 3442 | 178 |
| 2010.25 | 0 | 17365 | 3058 | 121 |
| 2010.5 | 2841 | 12427 | 2175 | 75 |
| 2010.75 | 0 | 8045 | 1059 | 24 |
| 2011 | 0 | 1806 | 4966 | 503 |
| 2011.25 | 0 | 1379 | 2845 | 286 |
| 2011.5 | 6343 | 1141 | 1848 | 166 |
| 2011.75 | 0 | 805 | 986 | 78 |
| 2012 | 0 | 3845 | 579 | 559 |
| 2012.25 | 0 | 2844 | 399 | 355 |
| 2012.5 | 35986 | 2194 | 288 | 224 |
| 2012.75 | 0 | 1715 | 207 | 128 |
| 2013 | 0 | 22485 | 1073 | 164 |
| 2013.25 | 0 | 17769 | 794 | 109 |
| 2013.5 | 9989 | 12316 | 547 | 68 |
| 2013.75 | 0 | 7484 | 306 | 25 |
| 2014 | 0 | 5550 | 3615 | 98 |
| 2014.25 | 0 | 3742 | 1940 | 58 |
| 2014.5 | 46694 | 2540 | 1020 | 32 |
| 2014.75 | 0 | 1765 | 442 | 6 |
| 2015 | 0 | 28339 | 1024 | 151 |
| 2015.25 | 0 | 21828 | 640 | 96 |
| 2015.5 | 18089 | 16263 | 390 | 56 |
| 2015.75 | 0 | 8603 | 159 | 10 |
| 2016 | 0 | 10409 | 4284 | 61 |
| 2016.25 | 0 | 7245 | 2508 | 37 |
| 2016.5 | 36651 | 4674 | 1368 | 19 |
| 2016.75 | 0 | 2562 | 586 | 2 |
| 2017 | 0 | 20148 | 1291 | 207 |
| 2017.25 | 0 | 12937 | 823 | 136 |
| 2017.5 | 11091 | 8357 | 519 | 83 |
| 2017.75 | 0 | 4800 | 243 | 19 |
| 2018 | 0 | 5439 | 2481 | 90 |
| 2018.25 | 0 | 3866 | 1461 | 58 |
| 2018.5 | 32662 | 2636 | 804 | 32 |
| 2018.75 | 0 | 1676 | 365 | 6 |
| 2019 | 0 | 16577 | 895 | 95 |
| 2019.25 | 0 | 11502 | 627 | 56 |
| 2019.5 | 50482 | 7604 | 328 | 24 |
| 2019.75 | 0 | 5313 | 131 | 2 |
| 2020 | 0 | 27711 | 3313 | 51 |
| 2020.25 | 0 | 20388 | 2275 | 33 |
| 2020.5 | 32115 | 15336 | 1405 | 18 |
| 2020.75 | 0 | 9929 | 595 | 3 |
| 2021 | 0 | 17107 | 5269 | 169 |
| 2021.25 | 0 | 11801 | 3226 | 101 |
| 2021.5 | 13770 | 7844 | 1789 | 52 |
| 2021.75 | 0 | 4920 | 903 | 13 |
| 2022 | 0 | 6976 | 2676 | 310 |
| 2022.25 | 0 | 4899 | 1480 | 198 |
| 2022.5 | 33445 | 3213 | 834 | 117 |
| 2022.75 | 0 | 2251 | 409 | 35 |
| 2023 | 0 | 15004 | 1344 | 150 |
| 2023.25 | 0 | 11163 | 766 | 95 |
| 2023.5 | 5777 | 7215 | 424 | 58 |
| 2023.75 | 0 | 3860 | 188 | 18 |
| 2024 | 0 | 2510 | 2082 | 101 |
| 2024.25 | 0 | 1338 | 1052 | 56 |
| 2024.5 | 4951 | 874 | 541 | 31 |
| 2024.75 | 0 | 556 | 288 | 15 |
| 2025 | 0 | 2748 | 367 | 156 |
| 2025.25 | 0 | 2002 | 250 | 99 |
| 2025.5 | 2430 | 1514 | 156 | 61 |
| 2025.75 | 0 | 1121 | 102 | 35 |