*Excludes Observations that spanned multiple years
Pre 1970 | 52 |
---|---|
1970 | 0 |
1971 | 1 |
1972 | 0 |
1973 | 1 |
1974 | 0 |
1975 | 1 |
1976 | 1 |
1977 | 0 |
1978 | 0 |
1979 | 2 |
1980 | 1 |
1981 | 0 |
1982 | 1 |
1983 | 1 |
1984 | 0 |
1985 | 0 |
1986 | 32 |
1987 | 22 |
1988 | 49 |
1989 | 18 |
1990 | 9 |
1991 | 28 |
1992 | 11 |
1993 | 16 |
1994 | 15 |
1995 | 20 |
1996 | 13 |
1997 | 27 |
1998 | 5 |
1999 | 36 |
2000 | 222 |
2001 | 363 |
2002 | 261 |
2003 | 163 |
2004 | 82 |
2005 | 74 |
2006 | 153 |
2007 | 74 |
2008 | 279 |
2009 | 1958 |
2010 | 118 |
2011 | 206 |
2012 | 173 |
2013 | 124 |
2014 | 201 |
2015 | 340 |
2016 | 216 |
2017 | 207 |
2018 | 421 |
2019 | 226 |
2020 | 459 |
2021 | 496 |
2022 | 2585 |
2023 | 253 |
2024 | 52 |
Total | 10068 |