*Excludes Observations that spanned multiple years
| B | b | t | W | w | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 3 | 16 | 0 | 1 | 20 |
| 1970 | 0 | 0 | 4 | 0 | 0 | 4 |
| 1971 | 0 | 8 | 0 | 0 | 1 | 9 |
| 1972 | 0 | 0 | 0 | 0 | 2 | 2 |
| 1973 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1974 | 0 | 0 | 1 | 0 | 1 | 2 |
| 1975 | 0 | 2 | 0 | 0 | 0 | 2 |
| 1976 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1977 | 1 | 0 | 3 | 0 | 1 | 5 |
| 1978 | 0 | 1 | 4 | 0 | 1 | 6 |
| 1979 | 0 | 4 | 5 | 0 | 0 | 9 |
| 1980 | 1 | 1 | 5 | 0 | 0 | 7 |
| 1981 | 0 | 1 | 5 | 0 | 1 | 7 |
| 1982 | 0 | 0 | 3 | 0 | 1 | 4 |
| 1983 | 0 | 1 | 5 | 0 | 0 | 6 |
| 1984 | 0 | 3 | 3 | 0 | 2 | 8 |
| 1985 | 0 | 2 | 3 | 0 | 0 | 5 |
| 1986 | 0 | 4 | 6 | 0 | 0 | 10 |
| 1987 | 0 | 3 | 12 | 0 | 1 | 16 |
| 1988 | 0 | 3 | 8 | 0 | 0 | 11 |
| 1989 | 0 | 11 | 11 | 0 | 3 | 25 |
| 1990 | 0 | 20 | 9 | 0 | 1 | 30 |
| 1991 | 4 | 12 | 11 | 0 | 1 | 28 |
| 1992 | 1 | 26 | 11 | 1 | 1 | 40 |
| 1993 | 0 | 55 | 16 | 0 | 1 | 72 |
| 1994 | 1 | 131 | 23 | 0 | 1 | 156 |
| 1995 | 2 | 118 | 26 | 0 | 0 | 146 |
| 1996 | 1 | 122 | 19 | 0 | 2 | 144 |
| 1997 | 1 | 148 | 25 | 0 | 1 | 175 |
| 1998 | 1 | 155 | 22 | 0 | 0 | 178 |
| 1999 | 1 | 118 | 16 | 0 | 0 | 135 |
| 2000 | 1 | 156 | 24 | 0 | 2 | 183 |
| 2001 | 2 | 141 | 25 | 0 | 3 | 171 |
| 2002 | 0 | 259 | 43 | 0 | 2 | 304 |
| 2003 | 0 | 347 | 40 | 0 | 2 | 389 |
| 2004 | 1 | 363 | 35 | 0 | 0 | 399 |
| 2005 | 3 | 234 | 38 | 0 | 1 | 276 |
| 2006 | 0 | 363 | 59 | 0 | 0 | 422 |
| 2007 | 0 | 355 | 53 | 0 | 0 | 408 |
| 2008 | 1 | 304 | 59 | 0 | 4 | 368 |
| 2009 | 1 | 194 | 94 | 0 | 1 | 290 |
| 2010 | 2 | 353 | 111 | 0 | 2 | 468 |
| 2011 | 1 | 158 | 125 | 0 | 3 | 287 |
| 2012 | 3 | 389 | 123 | 0 | 4 | 519 |
| 2013 | 5 | 525 | 125 | 0 | 2 | 657 |
| 2014 | 5 | 909 | 152 | 0 | 8 | 1074 |
| 2015 | 1 | 457 | 180 | 0 | 6 | 644 |
| 2016 | 3 | 373 | 186 | 0 | 4 | 566 |
| 2017 | 10 | 521 | 247 | 0 | 2 | 780 |
| 2018 | 9 | 476 | 261 | 0 | 0 | 746 |
| 2019 | 8 | 609 | 259 | 0 | 4 | 880 |
| 2020 | 3 | 576 | 400 | 0 | 2 | 981 |
| 2021 | 3 | 660 | 421 | 0 | 4 | 1088 |
| 2022 | 7 | 753 | 523 | 0 | 1 | 1284 |
| 2023 | 11 | 1002 | 311 | 0 | 2 | 1326 |
| 2024 | 17 | 990 | 336 | 0 | 3 | 1346 |
| 2025 | 0 | 1 | 16 | 0 | 0 | 17 |
| Total | 111 | 12420 | 4520 | 1 | 85 | 17137 |