*Excludes Observations that spanned multiple years
Pre 1970 | 88 |
---|---|
1970 | 227 |
1971 | 254 |
1972 | 262 |
1973 | 80 |
1974 | 136 |
1975 | 120 |
1976 | 104 |
1977 | 302 |
1978 | 234 |
1979 | 255 |
1980 | 607 |
1981 | 180 |
1982 | 605 |
1983 | 163 |
1984 | 195 |
1985 | 191 |
1986 | 56 |
1987 | 76 |
1988 | 104 |
1989 | 48 |
1990 | 109 |
1991 | 76 |
1992 | 48 |
1993 | 98 |
1994 | 52 |
1995 | 50 |
1996 | 63 |
1997 | 65 |
1998 | 62 |
1999 | 54 |
2000 | 47 |
2001 | 37 |
2002 | 66 |
2003 | 57 |
2004 | 50 |
2005 | 108 |
2006 | 78 |
2007 | 552 |
2008 | 189 |
2009 | 206 |
2010 | 130 |
2011 | 152 |
2012 | 164 |
2013 | 763 |
2014 | 109 |
2015 | 252 |
2016 | 399 |
2017 | 80 |
2018 | 85 |
2019 | 116 |
2020 | 43 |
2021 | 45 |
2022 | 72 |
2023 | 47 |
2024 | 53 |
Total | 8864 |