*Excludes Observations that spanned multiple years
Pre 1970 | 0 |
---|---|
1970 | 0 |
1971 | 0 |
1972 | 3 |
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 | 6 |
1995 | 6 |
1996 | 6 |
1997 | 6 |
1998 | 11 |
1999 | 23 |
2000 | 67 |
2001 | 156 |
2002 | 129 |
2003 | 375 |
2004 | 407 |
2005 | 277 |
2006 | 113 |
2007 | 121 |
2008 | 61 |
2009 | 54 |
2010 | 153 |
2011 | 125 |
2012 | 180 |
2013 | 92 |
2014 | 107 |
2015 | 128 |
2016 | 99 |
2017 | 89 |
2018 | 61 |
2019 | 0 |
2020 | 0 |
2021 | 0 |
2022 | 0 |
2023 | 0 |
2024 | 0 |
2025 | 0 |
Total | 2855 |