*Excludes Observations that spanned multiple years
| B | b | t | W | w | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 0 | 4 | 0 | 3 | 7 |
| 1970 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1971 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1972 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1973 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1974 | 0 | 8 | 2 | 0 | 0 | 10 |
| 1975 | 0 | 6 | 2 | 0 | 1 | 9 |
| 1976 | 0 | 3 | 1 | 0 | 1 | 5 |
| 1977 | 0 | 4 | 4 | 0 | 1 | 9 |
| 1978 | 0 | 4 | 3 | 0 | 1 | 8 |
| 1979 | 0 | 4 | 3 | 0 | 1 | 8 |
| 1980 | 0 | 0 | 4 | 0 | 1 | 5 |
| 1981 | 0 | 0 | 5 | 0 | 5 | 10 |
| 1982 | 0 | 0 | 4 | 0 | 2 | 6 |
| 1983 | 0 | 2 | 5 | 0 | 1 | 8 |
| 1984 | 0 | 0 | 2 | 0 | 3 | 5 |
| 1985 | 0 | 3 | 2 | 0 | 1 | 6 |
| 1986 | 1 | 3 | 10 | 0 | 1 | 15 |
| 1987 | 0 | 3 | 9 | 0 | 3 | 15 |
| 1988 | 0 | 6 | 5 | 0 | 3 | 14 |
| 1989 | 0 | 5 | 8 | 1 | 4 | 18 |
| 1990 | 0 | 13 | 6 | 0 | 4 | 23 |
| 1991 | 0 | 4 | 27 | 0 | 3 | 34 |
| 1992 | 0 | 5 | 21 | 0 | 2 | 28 |
| 1993 | 1 | 3 | 31 | 0 | 3 | 38 |
| 1994 | 1 | 8 | 43 | 0 | 7 | 59 |
| 1995 | 1 | 6 | 31 | 1 | 5 | 44 |
| 1996 | 2 | 1 | 22 | 0 | 4 | 29 |
| 1997 | 0 | 7 | 26 | 0 | 7 | 40 |
| 1998 | 3 | 7 | 34 | 0 | 9 | 53 |
| 1999 | 1 | 7 | 24 | 0 | 12 | 44 |
| 2000 | 0 | 6 | 37 | 0 | 9 | 52 |
| 2001 | 0 | 2 | 31 | 0 | 6 | 39 |
| 2002 | 0 | 0 | 35 | 0 | 5 | 40 |
| 2003 | 0 | 3 | 38 | 0 | 6 | 47 |
| 2004 | 1 | 3 | 20 | 0 | 8 | 32 |
| 2005 | 0 | 7 | 45 | 0 | 6 | 58 |
| 2006 | 0 | 4 | 56 | 1 | 8 | 69 |
| 2007 | 3 | 2 | 38 | 0 | 10 | 53 |
| 2008 | 2 | 2 | 81 | 0 | 5 | 90 |
| 2009 | 1 | 1 | 94 | 0 | 18 | 114 |
| 2010 | 1 | 2 | 207 | 0 | 13 | 223 |
| 2011 | 0 | 3 | 232 | 0 | 15 | 250 |
| 2012 | 1 | 16 | 290 | 0 | 35 | 342 |
| 2013 | 1 | 6 | 323 | 2 | 23 | 355 |
| 2014 | 3 | 8 | 248 | 0 | 32 | 291 |
| 2015 | 3 | 3 | 287 | 0 | 45 | 338 |
| 2016 | 1 | 4 | 423 | 0 | 51 | 479 |
| 2017 | 5 | 8 | 561 | 1 | 56 | 631 |
| 2018 | 5 | 7 | 541 | 1 | 51 | 605 |
| 2019 | 10 | 8 | 561 | 0 | 52 | 631 |
| 2020 | 5 | 5 | 637 | 0 | 55 | 702 |
| 2021 | 2 | 4 | 608 | 0 | 65 | 679 |
| 2022 | 0 | 2 | 598 | 0 | 70 | 670 |
| 2023 | 0 | 1 | 18 | 0 | 0 | 19 |
| 2024 | 0 | 0 | 8 | 0 | 4 | 12 |
| Total | 54 | 219 | 6359 | 7 | 736 | 7375 |