*Excludes Observations that spanned multiple years
Pre 1970 | 36 |
---|---|
1970 | 1 |
1971 | 1 |
1972 | 3 |
1973 | 0 |
1974 | 1 |
1975 | 2 |
1976 | 2 |
1977 | 3 |
1978 | 0 |
1979 | 4 |
1980 | 2 |
1981 | 1 |
1982 | 1 |
1983 | 3 |
1984 | 0 |
1985 | 2 |
1986 | 8 |
1987 | 21 |
1988 | 111 |
1989 | 7 |
1990 | 10 |
1991 | 62 |
1992 | 66 |
1993 | 118 |
1994 | 186 |
1995 | 144 |
1996 | 128 |
1997 | 76 |
1998 | 11 |
1999 | 5 |
2000 | 4 |
2001 | 6 |
2002 | 19 |
2003 | 33 |
2004 | 54 |
2005 | 47 |
2006 | 52 |
2007 | 58 |
2008 | 97 |
2009 | 71 |
2010 | 70 |
2011 | 49 |
2012 | 44 |
2013 | 52 |
2014 | 40 |
2015 | 45 |
2016 | 59 |
2017 | 58 |
2018 | 29 |
2019 | 39 |
2020 | 34 |
2021 | 51 |
2022 | 59 |
2023 | 45 |
2024 | 7 |
Total | 2137 |