| Table 3. Estimated stock numbers at age. | ||||||||||
| Year Age | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 1996 | 1623 | 1989 | 2283 | 2318 | 1846 | 1000 | 441 | 185 | 76 | 119 |
| 1997 | 1865 | 1381 | 1670 | 1839 | 1697 | 1170 | 588 | 237 | 93 | 108 |
| 1998 | 2898 | 1615 | 1189 | 1339 | 1381 | 1099 | 676 | 299 | 112 | 105 |
| 1999 | 3042 | 2470 | 1412 | 1015 | 993 | 868 | 603 | 310 | 124 | 102 |
| 2000 | 2971 | 2566 | 2105 | 1235 | 796 | 598 | 435 | 249 | 115 | 97 |
| 2001 | 2592 | 2561 | 2170 | 1732 | 1002 | 534 | 319 | 193 | 108 | 102 |
| 2002 | 2535 | 2232 | 2182 | 1821 | 1348 | 680 | 319 | 158 | 91 | 113 |
| 2003 | 2763 | 2201 | 1913 | 1810 | 1424 | 891 | 409 | 182 | 85 | 121 |
| 2004 | 3110 | 2385 | 1912 | 1587 | 1328 | 878 | 488 | 211 | 97 | 118 |
| 2005 | 3990 | 2653 | 2004 | 1545 | 1134 | 744 | 433 | 228 | 98 | 114 |
| 2006 | 3791 | 3439 | 2225 | 1581 | 1101 | 640 | 368 | 197 | 102 | 104 |
| 2007 | 3647 | 3261 | 2869 | 1788 | 1129 | 637 | 321 | 169 | 82 | 95 |
| 2008 | 3893 | 3094 | 2713 | 2274 | 1274 | 663 | 339 | 156 | 80 | 91 |
| 2009 | 3872 | 3353 | 2590 | 2178 | 1625 | 814 | 388 | 179 | 76 | 91 |
| 2010 | 3200 | 3375 | 2825 | 2158 | 1641 | 1018 | 483 | 205 | 85 | 86 |
| 2011 | 2201 | 2781 | 2937 | 2337 | 1671 | 1069 | 579 | 240 | 93 | 82 |
| 2012 | 2591 | 1852 | 2402 | 2438 | 1793 | 1096 | 620 | 273 | 105 | 81 |
| 2013 | 4633 | 2163 | 1523 | 2024 | 1894 | 1132 | 600 | 268 | 106 | 80 |
| 2014 | 4743 | 4119 | 1826 | 1291 | 1586 | 1409 | 694 | 317 | 132 | 96 |
| 2015 | 4294 | 4054 | 3605 | 1511 | 973 | 1001 | 788 | 253 | 129 | 98 |
| 2016 | 4364 | 3597 | 3452 | 2854 | 1169 | 632 | 571 | 338 | 112 | 105 |
| 2017 | 3491 | 3791 | 2963 | 2767 | 2118 | 816 | 387 | 304 | 183 | 120 |
| 2018 | 1781 | 3114 | 3249 | 2415 | 2132 | 1468 | 532 | 229 | 187 | 186 |
| 2019 | 1254 | 1516 | 2732 | 2721 | 1960 | 1432 | 999 | 327 | 148 | 233 |
| 2020 | 1102 | 1070 | 1311 | 2286 | 2144 | 1384 | 860 | 534 | 189 | 206 |
| 2021 | 992 | 944 | 883 | 1138 | 1747 | 1362 | 808 | 385 | 271 | 178 |
| 2022 | 1510 | 843 | 812 | 727 | 879 | 1119 | 763 | 402 | 198 | 197 |
| 2023 | 1623 | 1320 | 735 | 681 | 555 | 602 | 645 | 369 | 223 | 178 |
| 2024 | 934 | 1423 | 1165 | 608 | 510 | 353 | 362 | 315 | 202 | 181 |
| 2025 | 864 | 806 | 1234 | 994 | 469 | 330 | 213 | 185 | 164 | 156 |