*Excludes Observations that spanned multiple years
| B | b | t | W | w | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1970 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1971 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1972 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1973 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1974 | 0 | 3 | 2 | 0 | 0 | 5 |
| 1975 | 0 | 3 | 0 | 0 | 1 | 4 |
| 1976 | 0 | 2 | 1 | 0 | 1 | 4 |
| 1977 | 0 | 2 | 4 | 0 | 2 | 8 |
| 1978 | 0 | 2 | 1 | 0 | 0 | 3 |
| 1979 | 0 | 2 | 3 | 0 | 1 | 6 |
| 1980 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1981 | 0 | 0 | 3 | 0 | 2 | 5 |
| 1982 | 0 | 0 | 3 | 0 | 3 | 6 |
| 1983 | 0 | 0 | 5 | 0 | 2 | 7 |
| 1984 | 0 | 0 | 1 | 0 | 4 | 5 |
| 1985 | 1 | 2 | 4 | 0 | 2 | 9 |
| 1986 | 1 | 1 | 6 | 0 | 4 | 12 |
| 1987 | 1 | 3 | 10 | 0 | 6 | 20 |
| 1988 | 0 | 1 | 7 | 0 | 5 | 13 |
| 1989 | 1 | 2 | 5 | 1 | 4 | 13 |
| 1990 | 0 | 5 | 4 | 0 | 7 | 16 |
| 1991 | 5 | 5 | 14 | 0 | 3 | 27 |
| 1992 | 1 | 3 | 19 | 0 | 7 | 30 |
| 1993 | 1 | 8 | 16 | 0 | 6 | 31 |
| 1994 | 7 | 9 | 21 | 0 | 6 | 43 |
| 1995 | 6 | 8 | 16 | 0 | 5 | 35 |
| 1996 | 7 | 1 | 18 | 0 | 2 | 28 |
| 1997 | 4 | 1 | 22 | 0 | 5 | 32 |
| 1998 | 2 | 9 | 27 | 0 | 3 | 41 |
| 1999 | 2 | 9 | 26 | 0 | 4 | 41 |
| 2000 | 3 | 5 | 20 | 0 | 4 | 32 |
| 2001 | 4 | 1 | 30 | 0 | 8 | 43 |
| 2002 | 4 | 1 | 28 | 0 | 1 | 34 |
| 2003 | 2 | 8 | 26 | 0 | 2 | 38 |
| 2004 | 3 | 5 | 15 | 0 | 5 | 28 |
| 2005 | 4 | 5 | 32 | 0 | 7 | 48 |
| 2006 | 6 | 7 | 40 | 0 | 8 | 61 |
| 2007 | 8 | 7 | 45 | 0 | 8 | 68 |
| 2008 | 3 | 2 | 68 | 0 | 5 | 78 |
| 2009 | 4 | 5 | 77 | 0 | 10 | 96 |
| 2010 | 4 | 9 | 87 | 0 | 12 | 112 |
| 2011 | 3 | 1 | 73 | 0 | 13 | 90 |
| 2012 | 7 | 9 | 148 | 0 | 16 | 180 |
| 2013 | 11 | 6 | 201 | 0 | 12 | 230 |
| 2014 | 9 | 7 | 174 | 0 | 8 | 198 |
| 2015 | 7 | 8 | 210 | 0 | 15 | 240 |
| 2016 | 13 | 14 | 246 | 0 | 26 | 299 |
| 2017 | 21 | 18 | 257 | 0 | 26 | 322 |
| 2018 | 20 | 13 | 290 | 0 | 17 | 340 |
| 2019 | 31 | 16 | 320 | 1 | 7 | 375 |
| 2020 | 14 | 9 | 400 | 0 | 18 | 441 |
| 2021 | 12 | 5 | 424 | 0 | 12 | 453 |
| 2022 | 7 | 7 | 321 | 0 | 7 | 342 |
| 2023 | 0 | 3 | 14 | 0 | 0 | 17 |
| 2024 | 0 | 0 | 2 | 0 | 1 | 3 |
| Total | 239 | 252 | 3790 | 2 | 333 | 4616 |