

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1970 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1971 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1972 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1973 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1974 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1975 | 0 | 0 | 3 | 0 | 0 | 3 |
| 1976 | 0 | 1 | 2 | 0 | 0 | 3 |
| 1977 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1978 | 0 | 1 | 2 | 0 | 0 | 3 |
| 1979 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1980 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1981 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1982 | 0 | 1 | 3 | 0 | 0 | 4 |
| 1983 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1984 | 0 | 1 | 1 | 0 | 0 | 2 |
| 1985 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1986 | 1 | 2 | 1 | 0 | 0 | 4 |
| 1987 | 0 | 3 | 6 | 0 | 0 | 9 |
| 1988 | 0 | 1 | 3 | 0 | 0 | 4 |
| 1989 | 1 | 4 | 16 | 0 | 0 | 21 |
| 1990 | 1 | 16 | 1 | 0 | 0 | 18 |
| 1991 | 0 | 5 | 1 | 0 | 0 | 6 |
| 1992 | 2 | 91 | 5 | 0 | 0 | 98 |
| 1993 | 0 | 225 | 3 | 0 | 0 | 228 |
| 1994 | 3 | 808 | 9 | 0 | 0 | 820 |
| 1995 | 0 | 568 | 3 | 0 | 0 | 571 |
| 1996 | 0 | 621 | 1 | 0 | 0 | 622 |
| 1997 | 0 | 253 | 5 | 0 | 0 | 258 |
| 1998 | 1 | 533 | 4 | 0 | 0 | 538 |
| 1999 | 1 | 223 | 3 | 0 | 0 | 227 |
| 2000 | 1 | 765 | 15 | 0 | 0 | 781 |
| 2001 | 0 | 619 | 6 | 0 | 0 | 625 |
| 2002 | 0 | 784 | 12 | 0 | 0 | 796 |
| 2003 | 2 | 719 | 15 | 0 | 0 | 736 |
| 2004 | 0 | 862 | 6 | 0 | 0 | 868 |
| 2005 | 2 | 178 | 6 | 0 | 0 | 186 |
| 2006 | 0 | 375 | 20 | 0 | 0 | 395 |
| 2007 | 1 | 341 | 34 | 0 | 0 | 376 |
| 2008 | 0 | 284 | 18 | 0 | 0 | 302 |
| 2009 | 0 | 131 | 34 | 0 | 0 | 165 |
| 2010 | 0 | 370 | 61 | 0 | 0 | 431 |
| 2011 | 0 | 95 | 51 | 0 | 0 | 146 |
| 2012 | 3 | 260 | 32 | 0 | 0 | 295 |
| 2013 | 12 | 326 | 51 | 0 | 0 | 389 |
| 2014 | 0 | 464 | 71 | 0 | 0 | 535 |
| 2015 | 6 | 412 | 80 | 0 | 0 | 498 |
| 2016 | 2 | 576 | 80 | 0 | 0 | 658 |
| 2017 | 2 | 633 | 116 | 0 | 0 | 751 |
| 2018 | 1 | 687 | 139 | 0 | 0 | 827 |
| 2019 | 1 | 545 | 146 | 0 | 0 | 692 |
| 2020 | 3 | 761 | 194 | 0 | 0 | 958 |
| 2021 | 2 | 613 | 139 | 0 | 0 | 754 |
| 2022 | 7 | 679 | 239 | 0 | 0 | 925 |
| 2023 | 2 | 990 | 116 | 0 | 0 | 1108 |
| 2024 | 2 | 937 | 129 | 0 | 0 | 1068 |
| 2025 | 0 | 0 | 1 | 0 | 0 | 1 |
| Total | 59 | 16766 | 1885 | 0 | 0 | 18710 |