*Excludes Observations that spanned multiple years
Pre 1970 | 231 |
---|---|
1970 | 28 |
1971 | 44 |
1972 | 31 |
1973 | 31 |
1974 | 37 |
1975 | 35 |
1976 | 43 |
1977 | 27 |
1978 | 33 |
1979 | 27 |
1980 | 37 |
1981 | 50 |
1982 | 42 |
1983 | 31 |
1984 | 30 |
1985 | 41 |
1986 | 33 |
1987 | 24 |
1988 | 38 |
1989 | 37 |
1990 | 46 |
1991 | 24 |
1992 | 63 |
1993 | 72 |
1994 | 55 |
1995 | 105 |
1996 | 100 |
1997 | 107 |
1998 | 77 |
1999 | 53 |
2000 | 86 |
2001 | 62 |
2002 | 64 |
2003 | 33 |
2004 | 32 |
2005 | 30 |
2006 | 32 |
2007 | 18 |
2008 | 21 |
2009 | 45 |
2010 | 19 |
2011 | 54 |
2012 | 76 |
2013 | 70 |
2014 | 35 |
2015 | 43 |
2016 | 17 |
2017 | 22 |
2018 | 29 |
2019 | 20 |
2020 | 12 |
2021 | 10 |
2022 | 22 |
2023 | 29 |
2024 | 19 |
Total | 2532 |