*Excludes Observations that spanned multiple years
Pre 1970 | 0 |
---|---|
1970 | 0 |
1971 | 0 |
1972 | 0 |
1973 | 0 |
1974 | 0 |
1975 | 0 |
1976 | 0 |
1977 | 0 |
1978 | 0 |
1979 | 0 |
1980 | 0 |
1981 | 0 |
1982 | 0 |
1983 | 0 |
1984 | 0 |
1985 | 0 |
1986 | 0 |
1987 | 0 |
1988 | 0 |
1989 | 0 |
1990 | 0 |
1991 | 0 |
1992 | 0 |
1993 | 0 |
1994 | 0 |
1995 | 0 |
1996 | 0 |
1997 | 0 |
1998 | 0 |
1999 | 0 |
2000 | 0 |
2001 | 0 |
2002 | 0 |
2003 | 0 |
2004 | 0 |
2005 | 0 |
2006 | 0 |
2007 | 0 |
2008 | 0 |
2009 | 0 |
2010 | 0 |
2011 | 0 |
2012 | 0 |
2013 | 0 |
2014 | 0 |
2015 | 0 |
2016 | 0 |
2017 | 0 |
2018 | 0 |
2019 | 1 |
2020 | 2 |
2021 | 4 |
2022 | 3 |
2023 | 0 |
2024 | 0 |
Total | 10 |