*Excludes Observations that spanned multiple years
Pre 1970 | 154 |
---|---|
1970 | 1 |
1971 | 3 |
1972 | 2 |
1973 | 2 |
1974 | 4 |
1975 | 3 |
1976 | 1 |
1977 | 2 |
1978 | 1 |
1979 | 8 |
1980 | 5 |
1981 | 1 |
1982 | 1 |
1983 | 2 |
1984 | 2 |
1985 | 9 |
1986 | 2 |
1987 | 18 |
1988 | 57 |
1989 | 17 |
1990 | 8 |
1991 | 19 |
1992 | 60 |
1993 | 49 |
1994 | 54 |
1995 | 101 |
1996 | 29 |
1997 | 15 |
1998 | 30 |
1999 | 30 |
2000 | 31 |
2001 | 76 |
2002 | 43 |
2003 | 31 |
2004 | 57 |
2005 | 44 |
2006 | 22 |
2007 | 35 |
2008 | 47 |
2009 | 27 |
2010 | 77 |
2011 | 85 |
2012 | 45 |
2013 | 45 |
2014 | 57 |
2015 | 43 |
2016 | 50 |
2017 | 54 |
2018 | 70 |
2019 | 137 |
2020 | 27 |
2021 | 70 |
2022 | 134 |
2023 | 56 |
2024 | 33 |
Total | 2086 |