*Excludes Observations that spanned multiple years
Pre 1970 | 72 |
---|---|
1970 | 181 |
1971 | 163 |
1972 | 195 |
1973 | 52 |
1974 | 93 |
1975 | 105 |
1976 | 53 |
1977 | 74 |
1978 | 93 |
1979 | 24 |
1980 | 35 |
1981 | 124 |
1982 | 42 |
1983 | 29 |
1984 | 71 |
1985 | 40 |
1986 | 17 |
1987 | 5 |
1988 | 152 |
1989 | 168 |
1990 | 157 |
1991 | 161 |
1992 | 133 |
1993 | 639 |
1994 | 355 |
1995 | 306 |
1996 | 183 |
1997 | 145 |
1998 | 115 |
1999 | 203 |
2000 | 330 |
2001 | 225 |
2002 | 222 |
2003 | 105 |
2004 | 32 |
2005 | 100 |
2006 | 179 |
2007 | 267 |
2008 | 158 |
2009 | 108 |
2010 | 119 |
2011 | 117 |
2012 | 106 |
2013 | 149 |
2014 | 79 |
2015 | 35 |
2016 | 44 |
2017 | 38 |
2018 | 49 |
2019 | 73 |
2020 | 46 |
2021 | 37 |
2022 | 62 |
2023 | 30 |
2024 | 1 |
Total | 6896 |