*Excludes Observations that spanned multiple years
Pre 1970 | 20 |
---|---|
1970 | 56 |
1971 | 43 |
1972 | 69 |
1973 | 24 |
1974 | 8 |
1975 | 90 |
1976 | 147 |
1977 | 110 |
1978 | 54 |
1979 | 117 |
1980 | 297 |
1981 | 307 |
1982 | 346 |
1983 | 239 |
1984 | 227 |
1985 | 292 |
1986 | 47 |
1987 | 109 |
1988 | 39 |
1989 | 25 |
1990 | 30 |
1991 | 23 |
1992 | 34 |
1993 | 35 |
1994 | 12 |
1995 | 29 |
1996 | 33 |
1997 | 29 |
1998 | 47 |
1999 | 15 |
2000 | 28 |
2001 | 14 |
2002 | 25 |
2003 | 69 |
2004 | 30 |
2005 | 40 |
2006 | 22 |
2007 | 51 |
2008 | 108 |
2009 | 162 |
2010 | 166 |
2011 | 153 |
2012 | 139 |
2013 | 332 |
2014 | 54 |
2015 | 112 |
2016 | 92 |
2017 | 59 |
2018 | 70 |
2019 | 110 |
2020 | 52 |
2021 | 56 |
2022 | 80 |
2023 | 31 |
2024 | 65 |
Total | 5073 |