

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 1 | 8 | 0 | 17 | 26 |
| 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 | 1 | 0 | 0 | 1 |
| 1975 | 0 | 0 | 2 | 0 | 1 | 3 |
| 1976 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1977 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1978 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1979 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1980 | 0 | 0 | 1 | 0 | 1 | 2 |
| 1981 | 0 | 0 | 3 | 0 | 2 | 5 |
| 1982 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1983 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1984 | 0 | 0 | 1 | 0 | 1 | 2 |
| 1985 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1986 | 0 | 1 | 1 | 0 | 0 | 2 |
| 1987 | 0 | 0 | 1 | 0 | 1 | 2 |
| 1988 | 0 | 0 | 3 | 0 | 2 | 5 |
| 1989 | 0 | 0 | 10 | 0 | 0 | 10 |
| 1990 | 0 | 0 | 4 | 0 | 1 | 5 |
| 1991 | 2 | 1 | 8 | 0 | 0 | 11 |
| 1992 | 3 | 0 | 17 | 0 | 0 | 20 |
| 1993 | 3 | 1 | 17 | 0 | 1 | 22 |
| 1994 | 5 | 4 | 23 | 0 | 1 | 33 |
| 1995 | 6 | 3 | 24 | 0 | 4 | 37 |
| 1996 | 6 | 1 | 23 | 0 | 1 | 31 |
| 1997 | 1 | 2 | 14 | 0 | 1 | 18 |
| 1998 | 1 | 0 | 20 | 0 | 0 | 21 |
| 1999 | 2 | 1 | 15 | 0 | 1 | 19 |
| 2000 | 1 | 0 | 9 | 0 | 2 | 12 |
| 2001 | 1 | 13 | 35 | 0 | 0 | 49 |
| 2002 | 7 | 4 | 70 | 0 | 0 | 81 |
| 2003 | 4 | 4 | 16 | 0 | 1 | 25 |
| 2004 | 1 | 6 | 40 | 0 | 4 | 51 |
| 2005 | 30 | 8 | 19 | 1 | 5 | 63 |
| 2006 | 1 | 4 | 24 | 0 | 2 | 31 |
| 2007 | 2 | 18 | 30 | 0 | 3 | 53 |
| 2008 | 1 | 3 | 9 | 0 | 0 | 13 |
| 2009 | 0 | 1 | 7 | 0 | 0 | 8 |
| 2010 | 0 | 1 | 17 | 0 | 1 | 19 |
| 2011 | 0 | 2 | 11 | 0 | 1 | 14 |
| 2012 | 1 | 12 | 17 | 0 | 2 | 32 |
| 2013 | 3 | 16 | 21 | 0 | 0 | 40 |
| 2014 | 4 | 32 | 25 | 0 | 0 | 61 |
| 2015 | 0 | 23 | 26 | 0 | 3 | 52 |
| 2016 | 3 | 15 | 26 | 0 | 0 | 44 |
| 2017 | 4 | 20 | 37 | 0 | 1 | 62 |
| 2018 | 1 | 29 | 35 | 0 | 0 | 65 |
| 2019 | 4 | 28 | 39 | 0 | 0 | 71 |
| 2020 | 2 | 30 | 29 | 0 | 4 | 65 |
| 2021 | 0 | 21 | 33 | 0 | 5 | 59 |
| 2022 | 1 | 30 | 39 | 0 | 2 | 72 |
| 2023 | 2 | 27 | 49 | 0 | 4 | 82 |
| 2024 | 3 | 45 | 42 | 0 | 1 | 91 |
| 2025 | 0 | 0 | 2 | 0 | 0 | 2 |
| Total | 105 | 407 | 908 | 1 | 79 | 1500 |