*Excludes Observations that spanned multiple years
| B | b | t | W | w | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 1 | 0 | 18 | 0 | 2 | 21 |
| 1970 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1971 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1972 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1973 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1974 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1975 | 0 | 0 | 3 | 0 | 0 | 3 |
| 1976 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1977 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1978 | 0 | 0 | 6 | 0 | 1 | 7 |
| 1979 | 0 | 1 | 1 | 0 | 0 | 2 |
| 1980 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1981 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1982 | 0 | 0 | 1 | 0 | 2 | 3 |
| 1983 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1984 | 1 | 0 | 4 | 0 | 0 | 5 |
| 1985 | 2 | 0 | 2 | 0 | 0 | 4 |
| 1986 | 1 | 1 | 3 | 0 | 2 | 7 |
| 1987 | 2 | 0 | 3 | 0 | 0 | 5 |
| 1988 | 1 | 0 | 2 | 0 | 2 | 5 |
| 1989 | 1 | 1 | 10 | 0 | 2 | 14 |
| 1990 | 2 | 1 | 8 | 0 | 1 | 12 |
| 1991 | 4 | 3 | 11 | 0 | 2 | 20 |
| 1992 | 2 | 1 | 13 | 0 | 0 | 16 |
| 1993 | 5 | 2 | 7 | 0 | 2 | 16 |
| 1994 | 5 | 1 | 12 | 0 | 1 | 19 |
| 1995 | 1 | 2 | 12 | 0 | 2 | 17 |
| 1996 | 3 | 0 | 11 | 0 | 1 | 15 |
| 1997 | 1 | 1 | 21 | 0 | 2 | 25 |
| 1998 | 4 | 2 | 15 | 0 | 1 | 22 |
| 1999 | 3 | 1 | 17 | 0 | 2 | 23 |
| 2000 | 3 | 0 | 11 | 0 | 5 | 19 |
| 2001 | 5 | 0 | 14 | 0 | 2 | 21 |
| 2002 | 3 | 3 | 15 | 0 | 0 | 21 |
| 2003 | 7 | 3 | 12 | 0 | 3 | 25 |
| 2004 | 3 | 1 | 14 | 0 | 5 | 23 |
| 2005 | 2 | 1 | 18 | 0 | 3 | 24 |
| 2006 | 7 | 2 | 15 | 0 | 2 | 26 |
| 2007 | 3 | 4 | 9 | 0 | 3 | 19 |
| 2008 | 1 | 0 | 14 | 0 | 2 | 17 |
| 2009 | 8 | 2 | 10 | 0 | 1 | 21 |
| 2010 | 12 | 7 | 18 | 0 | 1 | 38 |
| 2011 | 7 | 4 | 25 | 0 | 4 | 40 |
| 2012 | 3 | 2 | 18 | 0 | 4 | 27 |
| 2013 | 2 | 1 | 38 | 0 | 7 | 48 |
| 2014 | 3 | 6 | 24 | 0 | 4 | 37 |
| 2015 | 10 | 2 | 43 | 0 | 5 | 60 |
| 2016 | 10 | 2 | 49 | 0 | 4 | 65 |
| 2017 | 5 | 3 | 43 | 0 | 9 | 60 |
| 2018 | 1 | 3 | 44 | 0 | 10 | 58 |
| 2019 | 3 | 36 | 42 | 0 | 7 | 88 |
| 2020 | 6 | 35 | 50 | 0 | 9 | 100 |
| 2021 | 1 | 18 | 40 | 0 | 3 | 62 |
| 2022 | 6 | 11 | 46 | 0 | 9 | 72 |
| 2023 | 6 | 4 | 52 | 0 | 7 | 69 |
| 2024 | 9 | 4 | 71 | 0 | 0 | 84 |
| 2025 | 0 | 0 | 3 | 0 | 1 | 4 |
| 2026 | 0 | 0 | 0 | 0 | 1 | 1 |
| Total | 165 | 171 | 925 | 0 | 138 | 1399 |