*Excludes Observations that spanned multiple years
| B | b | t | W | w | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 1 | 4 | 5 | 0 | 114 | 124 |
| 1970 | 0 | 0 | 0 | 0 | 4 | 4 |
| 1971 | 0 | 0 | 0 | 0 | 10 | 10 |
| 1972 | 0 | 0 | 0 | 0 | 7 | 7 |
| 1973 | 0 | 0 | 1 | 0 | 7 | 8 |
| 1974 | 1 | 0 | 1 | 0 | 6 | 8 |
| 1975 | 0 | 0 | 1 | 0 | 6 | 7 |
| 1976 | 0 | 0 | 1 | 0 | 9 | 10 |
| 1977 | 0 | 0 | 2 | 0 | 10 | 12 |
| 1978 | 0 | 0 | 1 | 0 | 9 | 10 |
| 1979 | 0 | 0 | 1 | 0 | 11 | 12 |
| 1980 | 0 | 2 | 1 | 0 | 10 | 13 |
| 1981 | 0 | 0 | 0 | 0 | 14 | 14 |
| 1982 | 0 | 0 | 3 | 0 | 16 | 19 |
| 1983 | 0 | 0 | 2 | 0 | 7 | 9 |
| 1984 | 0 | 1 | 4 | 0 | 10 | 15 |
| 1985 | 0 | 2 | 0 | 0 | 7 | 9 |
| 1986 | 0 | 1 | 3 | 0 | 18 | 22 |
| 1987 | 0 | 2 | 16 | 0 | 21 | 39 |
| 1988 | 0 | 2 | 15 | 0 | 20 | 37 |
| 1989 | 0 | 6 | 21 | 0 | 19 | 46 |
| 1990 | 1 | 23 | 1 | 0 | 14 | 39 |
| 1991 | 1 | 4 | 7 | 0 | 12 | 24 |
| 1992 | 1 | 4 | 6 | 0 | 16 | 27 |
| 1993 | 2 | 13 | 19 | 0 | 19 | 53 |
| 1994 | 1 | 64 | 22 | 0 | 20 | 107 |
| 1995 | 3 | 11 | 18 | 2 | 19 | 53 |
| 1996 | 1 | 48 | 14 | 1 | 9 | 73 |
| 1997 | 2 | 29 | 126 | 0 | 20 | 177 |
| 1998 | 4 | 48 | 136 | 0 | 15 | 203 |
| 1999 | 0 | 34 | 132 | 0 | 15 | 181 |
| 2000 | 1 | 36 | 161 | 0 | 24 | 222 |
| 2001 | 0 | 6 | 121 | 0 | 21 | 148 |
| 2002 | 0 | 2 | 111 | 0 | 8 | 121 |
| 2003 | 0 | 13 | 135 | 0 | 13 | 161 |
| 2004 | 0 | 3 | 146 | 0 | 21 | 170 |
| 2005 | 1 | 4 | 134 | 0 | 19 | 158 |
| 2006 | 3 | 5 | 242 | 0 | 15 | 265 |
| 2007 | 0 | 7 | 166 | 1 | 24 | 198 |
| 2008 | 2 | 9 | 104 | 1 | 16 | 132 |
| 2009 | 0 | 28 | 126 | 0 | 27 | 181 |
| 2010 | 3 | 52 | 168 | 0 | 33 | 256 |
| 2011 | 0 | 28 | 133 | 0 | 36 | 197 |
| 2012 | 5 | 98 | 134 | 2 | 60 | 299 |
| 2013 | 7 | 164 | 256 | 2 | 62 | 491 |
| 2014 | 3 | 185 | 296 | 2 | 88 | 574 |
| 2015 | 8 | 289 | 354 | 0 | 99 | 750 |
| 2016 | 7 | 259 | 408 | 0 | 154 | 828 |
| 2017 | 10 | 329 | 507 | 1 | 160 | 1007 |
| 2018 | 13 | 321 | 435 | 1 | 171 | 941 |
| 2019 | 11 | 275 | 495 | 1 | 168 | 950 |
| 2020 | 3 | 293 | 537 | 0 | 203 | 1036 |
| 2021 | 4 | 256 | 609 | 1 | 179 | 1049 |
| 2022 | 3 | 289 | 280 | 0 | 119 | 691 |
| 2023 | 1 | 0 | 12 | 0 | 2 | 15 |
| 2024 | 0 | 0 | 0 | 0 | 1 | 1 |
| Total | 103 | 3249 | 6629 | 15 | 2217 | 12213 |