*Excludes Observations that spanned multiple years
| B | b | t | W | w | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 2 | 11 | 0 | 0 | 13 |
| 1970 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1971 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1972 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1973 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1974 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1975 | 0 | 2 | 5 | 0 | 0 | 7 |
| 1976 | 0 | 2 | 1 | 0 | 0 | 3 |
| 1977 | 1 | 0 | 3 | 0 | 0 | 4 |
| 1978 | 0 | 1 | 3 | 0 | 0 | 4 |
| 1979 | 0 | 1 | 2 | 0 | 0 | 3 |
| 1980 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1981 | 0 | 0 | 4 | 0 | 0 | 4 |
| 1982 | 0 | 0 | 4 | 0 | 0 | 4 |
| 1983 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1984 | 0 | 3 | 4 | 0 | 0 | 7 |
| 1985 | 0 | 1 | 3 | 0 | 0 | 4 |
| 1986 | 0 | 4 | 5 | 0 | 0 | 9 |
| 1987 | 1 | 5 | 16 | 0 | 0 | 22 |
| 1988 | 0 | 3 | 20 | 0 | 0 | 23 |
| 1989 | 0 | 5 | 26 | 0 | 0 | 31 |
| 1990 | 0 | 23 | 7 | 0 | 0 | 30 |
| 1991 | 3 | 15 | 7 | 0 | 0 | 25 |
| 1992 | 1 | 189 | 11 | 0 | 0 | 201 |
| 1993 | 1 | 400 | 12 | 0 | 0 | 413 |
| 1994 | 3 | 1025 | 22 | 0 | 0 | 1050 |
| 1995 | 1 | 684 | 16 | 0 | 0 | 701 |
| 1996 | 2 | 796 | 7 | 0 | 0 | 805 |
| 1997 | 1 | 356 | 13 | 0 | 0 | 370 |
| 1998 | 0 | 727 | 7 | 0 | 0 | 734 |
| 1999 | 0 | 173 | 15 | 0 | 0 | 188 |
| 2000 | 0 | 940 | 17 | 0 | 0 | 957 |
| 2001 | 0 | 479 | 19 | 0 | 0 | 498 |
| 2002 | 0 | 627 | 28 | 0 | 0 | 655 |
| 2003 | 1 | 427 | 26 | 0 | 0 | 454 |
| 2004 | 0 | 761 | 13 | 0 | 0 | 774 |
| 2005 | 1 | 301 | 27 | 0 | 0 | 329 |
| 2006 | 2 | 299 | 26 | 0 | 0 | 327 |
| 2007 | 2 | 447 | 51 | 0 | 0 | 500 |
| 2008 | 0 | 244 | 38 | 0 | 0 | 282 |
| 2009 | 1 | 41 | 41 | 0 | 0 | 83 |
| 2010 | 1 | 271 | 98 | 0 | 0 | 370 |
| 2011 | 1 | 74 | 77 | 0 | 0 | 152 |
| 2012 | 3 | 260 | 80 | 0 | 0 | 343 |
| 2013 | 6 | 398 | 116 | 0 | 0 | 520 |
| 2014 | 2 | 326 | 162 | 0 | 0 | 490 |
| 2015 | 5 | 464 | 153 | 0 | 0 | 622 |
| 2016 | 3 | 585 | 174 | 0 | 0 | 762 |
| 2017 | 5 | 587 | 199 | 0 | 0 | 791 |
| 2018 | 2 | 603 | 230 | 0 | 0 | 835 |
| 2019 | 7 | 519 | 260 | 0 | 0 | 786 |
| 2020 | 2 | 627 | 305 | 0 | 0 | 934 |
| 2021 | 4 | 489 | 276 | 0 | 0 | 769 |
| 2022 | 0 | 576 | 303 | 0 | 0 | 879 |
| 2023 | 9 | 873 | 133 | 0 | 0 | 1015 |
| 2024 | 7 | 956 | 141 | 0 | 0 | 1104 |
| 2025 | 0 | 1 | 8 | 0 | 0 | 9 |
| Total | 78 | 16594 | 3228 | 0 | 0 | 19900 |