*Excludes Observations that spanned multiple years
Pre 1970 | 10 |
---|---|
1970 | 0 |
1971 | 4 |
1972 | 0 |
1973 | 1 |
1974 | 0 |
1975 | 2 |
1976 | 0 |
1977 | 4 |
1978 | 3 |
1979 | 0 |
1980 | 0 |
1981 | 0 |
1982 | 2 |
1983 | 1 |
1984 | 3 |
1985 | 80 |
1986 | 64 |
1987 | 206 |
1988 | 408 |
1989 | 59 |
1990 | 32 |
1991 | 223 |
1992 | 184 |
1993 | 430 |
1994 | 208 |
1995 | 288 |
1996 | 286 |
1997 | 210 |
1998 | 39 |
1999 | 112 |
2000 | 51 |
2001 | 157 |
2002 | 67 |
2003 | 71 |
2004 | 97 |
2005 | 91 |
2006 | 49 |
2007 | 74 |
2008 | 64 |
2009 | 78 |
2010 | 94 |
2011 | 80 |
2012 | 109 |
2013 | 90 |
2014 | 86 |
2015 | 87 |
2016 | 86 |
2017 | 81 |
2018 | 51 |
2019 | 135 |
2020 | 100 |
2021 | 80 |
2022 | 99 |
2023 | 77 |
2024 | 91 |
Total | 5004 |