*Excludes Observations that spanned multiple years
Pre 1970 | 156 |
---|---|
1970 | 17 |
1971 | 8 |
1972 | 20 |
1973 | 28 |
1974 | 72 |
1975 | 52 |
1976 | 33 |
1977 | 33 |
1978 | 30 |
1979 | 40 |
1980 | 23 |
1981 | 35 |
1982 | 36 |
1983 | 35 |
1984 | 89 |
1985 | 32 |
1986 | 54 |
1987 | 50 |
1988 | 54 |
1989 | 48 |
1990 | 53 |
1991 | 57 |
1992 | 62 |
1993 | 75 |
1994 | 63 |
1995 | 120 |
1996 | 110 |
1997 | 96 |
1998 | 84 |
1999 | 96 |
2000 | 104 |
2001 | 109 |
2002 | 115 |
2003 | 96 |
2004 | 114 |
2005 | 96 |
2006 | 90 |
2007 | 87 |
2008 | 103 |
2009 | 114 |
2010 | 131 |
2011 | 187 |
2012 | 228 |
2013 | 189 |
2014 | 205 |
2015 | 167 |
2016 | 163 |
2017 | 129 |
2018 | 125 |
2019 | 129 |
2020 | 189 |
2021 | 150 |
2022 | 101 |
2023 | 6 |
2024 | 11 |
Total | 4899 |