

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 1 | 0 | 2 | 0 | 0 | 3 |
| 1970 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1971 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1972 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1973 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1974 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1975 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1976 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1977 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1978 | 0 | 0 | 6 | 0 | 0 | 6 |
| 1979 | 0 | 0 | 9 | 0 | 0 | 9 |
| 1980 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1981 | 0 | 0 | 3 | 0 | 0 | 3 |
| 1982 | 0 | 0 | 3 | 0 | 0 | 3 |
| 1983 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1984 | 0 | 0 | 3 | 0 | 0 | 3 |
| 1985 | 1 | 0 | 6 | 0 | 0 | 7 |
| 1986 | 0 | 0 | 6 | 0 | 0 | 6 |
| 1987 | 0 | 0 | 6 | 0 | 0 | 6 |
| 1988 | 0 | 0 | 9 | 0 | 0 | 9 |
| 1989 | 0 | 0 | 9 | 0 | 0 | 9 |
| 1990 | 1 | 3 | 7 | 0 | 0 | 11 |
| 1991 | 2 | 4 | 7 | 0 | 0 | 13 |
| 1992 | 0 | 4 | 10 | 0 | 0 | 14 |
| 1993 | 0 | 2 | 11 | 0 | 0 | 13 |
| 1994 | 1 | 10 | 17 | 0 | 0 | 28 |
| 1995 | 4 | 4 | 24 | 0 | 0 | 32 |
| 1996 | 2 | 1 | 11 | 0 | 0 | 14 |
| 1997 | 1 | 4 | 6 | 0 | 0 | 11 |
| 1998 | 1 | 5 | 8 | 0 | 0 | 14 |
| 1999 | 0 | 1 | 10 | 0 | 0 | 11 |
| 2000 | 1 | 1 | 25 | 0 | 0 | 27 |
| 2001 | 1 | 1 | 20 | 0 | 0 | 22 |
| 2002 | 0 | 0 | 40 | 0 | 0 | 40 |
| 2003 | 1 | 11 | 38 | 0 | 0 | 50 |
| 2004 | 0 | 2 | 31 | 0 | 0 | 33 |
| 2005 | 1 | 5 | 11 | 0 | 0 | 17 |
| 2006 | 0 | 1 | 50 | 0 | 0 | 51 |
| 2007 | 0 | 4 | 34 | 0 | 0 | 38 |
| 2008 | 0 | 0 | 33 | 0 | 0 | 33 |
| 2009 | 2 | 6 | 44 | 0 | 0 | 52 |
| 2010 | 1 | 9 | 40 | 0 | 0 | 50 |
| 2011 | 0 | 7 | 40 | 0 | 0 | 47 |
| 2012 | 2 | 22 | 59 | 0 | 0 | 83 |
| 2013 | 3 | 6 | 111 | 0 | 0 | 120 |
| 2014 | 0 | 6 | 110 | 0 | 0 | 116 |
| 2015 | 4 | 14 | 159 | 0 | 0 | 177 |
| 2016 | 0 | 4 | 161 | 0 | 0 | 165 |
| 2017 | 2 | 2 | 186 | 0 | 0 | 190 |
| 2018 | 0 | 2 | 175 | 0 | 0 | 177 |
| 2019 | 1 | 7 | 218 | 0 | 0 | 226 |
| 2020 | 1 | 6 | 208 | 0 | 0 | 215 |
| 2021 | 5 | 2 | 248 | 0 | 0 | 255 |
| 2022 | 0 | 0 | 259 | 0 | 0 | 259 |
| 2023 | 2 | 8 | 261 | 0 | 0 | 271 |
| 2024 | 0 | 10 | 254 | 0 | 0 | 264 |
| 2025 | 0 | 2 | 5 | 0 | 0 | 7 |
| Total | 41 | 176 | 3003 | 0 | 0 | 3220 |