*Excludes Observations that spanned multiple years
Pre 1970 | 33 |
---|---|
1970 | 5 |
1971 | 11 |
1972 | 3 |
1973 | 7 |
1974 | 26 |
1975 | 32 |
1976 | 19 |
1977 | 10 |
1978 | 14 |
1979 | 12 |
1980 | 8 |
1981 | 7 |
1982 | 7 |
1983 | 15 |
1984 | 30 |
1985 | 18 |
1986 | 10 |
1987 | 10 |
1988 | 10 |
1989 | 10 |
1990 | 23 |
1991 | 9 |
1992 | 15 |
1993 | 21 |
1994 | 14 |
1995 | 141 |
1996 | 133 |
1997 | 83 |
1998 | 37 |
1999 | 44 |
2000 | 30 |
2001 | 37 |
2002 | 33 |
2003 | 28 |
2004 | 29 |
2005 | 25 |
2006 | 29 |
2007 | 38 |
2008 | 67 |
2009 | 75 |
2010 | 79 |
2011 | 74 |
2012 | 108 |
2013 | 114 |
2014 | 107 |
2015 | 141 |
2016 | 155 |
2017 | 95 |
2018 | 55 |
2019 | 83 |
2020 | 87 |
2021 | 90 |
2022 | 54 |
2023 | 8 |
2024 | 3 |
Total | 2461 |