

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 4 | 7 | 0 | 0 | 11 |
| 1970 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1971 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1972 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1973 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1974 | 0 | 1 | 2 | 0 | 0 | 3 |
| 1975 | 0 | 1 | 1 | 0 | 0 | 2 |
| 1976 | 0 | 3 | 0 | 0 | 0 | 3 |
| 1977 | 0 | 0 | 3 | 0 | 0 | 3 |
| 1978 | 0 | 1 | 1 | 0 | 0 | 2 |
| 1979 | 0 | 1 | 1 | 0 | 0 | 2 |
| 1980 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1981 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1982 | 0 | 1 | 2 | 0 | 0 | 3 |
| 1983 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1984 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1985 | 0 | 0 | 5 | 0 | 0 | 5 |
| 1986 | 0 | 2 | 3 | 0 | 0 | 5 |
| 1987 | 0 | 1 | 15 | 0 | 0 | 16 |
| 1988 | 0 | 1 | 16 | 0 | 0 | 17 |
| 1989 | 0 | 2 | 18 | 0 | 0 | 20 |
| 1990 | 1 | 12 | 5 | 0 | 0 | 18 |
| 1991 | 0 | 7 | 7 | 0 | 0 | 14 |
| 1992 | 1 | 96 | 7 | 0 | 0 | 104 |
| 1993 | 0 | 317 | 7 | 0 | 0 | 324 |
| 1994 | 1 | 942 | 21 | 0 | 0 | 964 |
| 1995 | 1 | 911 | 10 | 0 | 0 | 922 |
| 1996 | 1 | 899 | 4 | 0 | 0 | 904 |
| 1997 | 0 | 554 | 10 | 0 | 0 | 564 |
| 1998 | 0 | 696 | 9 | 0 | 0 | 705 |
| 1999 | 0 | 108 | 8 | 0 | 0 | 116 |
| 2000 | 0 | 850 | 11 | 0 | 0 | 861 |
| 2001 | 1 | 409 | 15 | 0 | 0 | 425 |
| 2002 | 0 | 879 | 19 | 0 | 0 | 898 |
| 2003 | 0 | 359 | 8 | 0 | 0 | 367 |
| 2004 | 0 | 893 | 9 | 0 | 0 | 902 |
| 2005 | 0 | 249 | 11 | 0 | 0 | 260 |
| 2006 | 0 | 339 | 6 | 0 | 0 | 345 |
| 2007 | 0 | 647 | 26 | 0 | 0 | 673 |
| 2008 | 0 | 262 | 27 | 0 | 0 | 289 |
| 2009 | 0 | 11 | 24 | 0 | 0 | 35 |
| 2010 | 1 | 198 | 65 | 0 | 0 | 264 |
| 2011 | 0 | 147 | 48 | 0 | 0 | 195 |
| 2012 | 0 | 290 | 43 | 0 | 0 | 333 |
| 2013 | 0 | 313 | 45 | 0 | 0 | 358 |
| 2014 | 2 | 399 | 63 | 0 | 0 | 464 |
| 2015 | 1 | 382 | 78 | 0 | 0 | 461 |
| 2016 | 0 | 525 | 78 | 0 | 0 | 603 |
| 2017 | 1 | 514 | 103 | 0 | 0 | 618 |
| 2018 | 3 | 657 | 133 | 0 | 0 | 793 |
| 2019 | 1 | 481 | 104 | 0 | 0 | 586 |
| 2020 | 0 | 619 | 161 | 0 | 0 | 780 |
| 2021 | 2 | 460 | 123 | 0 | 0 | 585 |
| 2022 | 0 | 537 | 129 | 0 | 0 | 666 |
| 2023 | 1 | 534 | 101 | 0 | 0 | 636 |
| 2024 | 0 | 651 | 83 | 0 | 0 | 734 |
| 2025 | 0 | 0 | 3 | 0 | 0 | 3 |
| Total | 18 | 16167 | 1687 | 0 | 0 | 17872 |