*Excludes Observations that spanned multiple years
Pre 1970 | 24 |
---|---|
1970 | 2 |
1971 | 0 |
1972 | 1 |
1973 | 2 |
1974 | 9 |
1975 | 3 |
1976 | 2 |
1977 | 3 |
1978 | 1 |
1979 | 6 |
1980 | 2 |
1981 | 27 |
1982 | 11 |
1983 | 7 |
1984 | 11 |
1985 | 21 |
1986 | 4 |
1987 | 2 |
1988 | 3 |
1989 | 3 |
1990 | 5 |
1991 | 6 |
1992 | 7 |
1993 | 54 |
1994 | 27 |
1995 | 102 |
1996 | 35 |
1997 | 58 |
1998 | 77 |
1999 | 32 |
2000 | 34 |
2001 | 48 |
2002 | 84 |
2003 | 61 |
2004 | 126 |
2005 | 113 |
2006 | 111 |
2007 | 152 |
2008 | 197 |
2009 | 134 |
2010 | 86 |
2011 | 86 |
2012 | 109 |
2013 | 115 |
2014 | 32 |
2015 | 29 |
2016 | 78 |
2017 | 39 |
2018 | 61 |
2019 | 86 |
2020 | 51 |
2021 | 56 |
2022 | 72 |
2023 | 57 |
2024 | 89 |
Total | 2653 |