*Excludes Observations that spanned multiple years
| B | b | t | W | w | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 0 | 0 | 0 | 5 | 5 |
| 1970 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1971 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1972 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1973 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1974 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1975 | 0 | 0 | 1 | 0 | 1 | 2 |
| 1976 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1977 | 0 | 0 | 0 | 0 | 4 | 4 |
| 1978 | 0 | 0 | 0 | 0 | 3 | 3 |
| 1979 | 0 | 0 | 0 | 0 | 2 | 2 |
| 1980 | 1 | 0 | 0 | 0 | 1 | 2 |
| 1981 | 0 | 0 | 0 | 0 | 3 | 3 |
| 1982 | 0 | 0 | 1 | 0 | 5 | 6 |
| 1983 | 0 | 0 | 1 | 0 | 4 | 5 |
| 1984 | 0 | 0 | 0 | 0 | 5 | 5 |
| 1985 | 0 | 0 | 2 | 0 | 4 | 6 |
| 1986 | 0 | 0 | 1 | 0 | 1 | 2 |
| 1987 | 0 | 3 | 4 | 1 | 4 | 12 |
| 1988 | 0 | 3 | 8 | 0 | 4 | 15 |
| 1989 | 0 | 0 | 3 | 1 | 5 | 9 |
| 1990 | 0 | 4 | 0 | 0 | 6 | 10 |
| 1991 | 0 | 5 | 4 | 0 | 1 | 10 |
| 1992 | 0 | 7 | 1 | 0 | 3 | 11 |
| 1993 | 0 | 10 | 1 | 0 | 1 | 12 |
| 1994 | 1 | 256 | 14 | 0 | 5 | 276 |
| 1995 | 1 | 237 | 13 | 0 | 6 | 257 |
| 1996 | 0 | 205 | 13 | 0 | 3 | 221 |
| 1997 | 2 | 100 | 34 | 0 | 6 | 142 |
| 1998 | 0 | 314 | 1 | 0 | 2 | 317 |
| 1999 | 0 | 25 | 1 | 0 | 6 | 32 |
| 2000 | 2 | 325 | 6 | 0 | 10 | 343 |
| 2001 | 0 | 97 | 5 | 0 | 7 | 109 |
| 2002 | 0 | 218 | 8 | 0 | 7 | 233 |
| 2003 | 0 | 41 | 3 | 0 | 5 | 49 |
| 2004 | 1 | 186 | 5 | 0 | 4 | 196 |
| 2005 | 0 | 88 | 5 | 0 | 7 | 100 |
| 2006 | 1 | 97 | 3 | 0 | 8 | 109 |
| 2007 | 2 | 125 | 9 | 0 | 9 | 145 |
| 2008 | 0 | 53 | 12 | 0 | 4 | 69 |
| 2009 | 0 | 0 | 10 | 0 | 0 | 10 |
| 2010 | 0 | 24 | 24 | 0 | 3 | 51 |
| 2011 | 0 | 18 | 14 | 0 | 4 | 36 |
| 2012 | 0 | 73 | 3 | 0 | 8 | 84 |
| 2013 | 0 | 94 | 5 | 0 | 6 | 105 |
| 2014 | 0 | 60 | 2 | 0 | 7 | 69 |
| 2015 | 0 | 4 | 6 | 0 | 6 | 16 |
| 2016 | 0 | 14 | 0 | 0 | 7 | 21 |
| 2017 | 0 | 2 | 0 | 0 | 4 | 6 |
| 2018 | 0 | 1 | 1 | 0 | 2 | 4 |
| 2019 | 0 | 6 | 7 | 0 | 0 | 13 |
| 2020 | 0 | 6 | 1 | 0 | 1 | 8 |
| 2021 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 11 | 2701 | 232 | 2 | 201 | 3147 |