*Excludes Observations that spanned multiple years
| B | b | t | W | w | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 0 | 7 | 0 | 4 | 11 |
| 1970 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1971 | 0 | 0 | 2 | 0 | 1 | 3 |
| 1972 | 0 | 0 | 1 | 0 | 1 | 2 |
| 1973 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1974 | 0 | 6 | 1 | 0 | 0 | 7 |
| 1975 | 0 | 3 | 3 | 0 | 3 | 9 |
| 1976 | 0 | 2 | 1 | 0 | 3 | 6 |
| 1977 | 0 | 5 | 9 | 0 | 1 | 15 |
| 1978 | 0 | 3 | 5 | 0 | 2 | 10 |
| 1979 | 0 | 4 | 9 | 0 | 2 | 15 |
| 1980 | 0 | 0 | 3 | 0 | 2 | 5 |
| 1981 | 0 | 0 | 11 | 0 | 5 | 16 |
| 1982 | 0 | 0 | 10 | 0 | 3 | 13 |
| 1983 | 0 | 1 | 5 | 0 | 0 | 6 |
| 1984 | 0 | 0 | 3 | 0 | 2 | 5 |
| 1985 | 1 | 4 | 5 | 0 | 3 | 13 |
| 1986 | 1 | 2 | 9 | 0 | 1 | 13 |
| 1987 | 2 | 3 | 13 | 0 | 3 | 21 |
| 1988 | 2 | 5 | 8 | 0 | 3 | 18 |
| 1989 | 3 | 7 | 10 | 0 | 4 | 24 |
| 1990 | 1 | 12 | 18 | 0 | 3 | 34 |
| 1991 | 6 | 9 | 21 | 0 | 3 | 39 |
| 1992 | 1 | 3 | 14 | 0 | 2 | 20 |
| 1993 | 2 | 9 | 27 | 0 | 2 | 40 |
| 1994 | 3 | 15 | 35 | 0 | 7 | 60 |
| 1995 | 4 | 6 | 30 | 0 | 5 | 45 |
| 1996 | 6 | 5 | 35 | 0 | 5 | 51 |
| 1997 | 2 | 17 | 45 | 0 | 10 | 74 |
| 1998 | 0 | 11 | 43 | 0 | 9 | 63 |
| 1999 | 0 | 5 | 35 | 0 | 11 | 51 |
| 2000 | 1 | 6 | 38 | 0 | 7 | 52 |
| 2001 | 1 | 6 | 38 | 0 | 6 | 51 |
| 2002 | 0 | 1 | 59 | 0 | 5 | 65 |
| 2003 | 3 | 5 | 75 | 0 | 4 | 87 |
| 2004 | 0 | 8 | 48 | 0 | 8 | 64 |
| 2005 | 1 | 4 | 84 | 0 | 5 | 94 |
| 2006 | 0 | 4 | 76 | 1 | 7 | 88 |
| 2007 | 0 | 3 | 65 | 1 | 10 | 79 |
| 2008 | 0 | 2 | 92 | 0 | 5 | 99 |
| 2009 | 2 | 0 | 162 | 0 | 8 | 172 |
| 2010 | 1 | 0 | 249 | 0 | 7 | 257 |
| 2011 | 1 | 2 | 304 | 0 | 9 | 316 |
| 2012 | 2 | 6 | 429 | 0 | 20 | 457 |
| 2013 | 0 | 4 | 321 | 0 | 18 | 343 |
| 2014 | 4 | 0 | 204 | 0 | 27 | 235 |
| 2015 | 5 | 1 | 271 | 0 | 27 | 304 |
| 2016 | 5 | 1 | 340 | 0 | 34 | 380 |
| 2017 | 3 | 1 | 456 | 0 | 37 | 497 |
| 2018 | 7 | 6 | 496 | 1 | 41 | 551 |
| 2019 | 6 | 1 | 518 | 0 | 24 | 549 |
| 2020 | 1 | 4 | 554 | 0 | 48 | 607 |
| 2021 | 0 | 0 | 552 | 0 | 40 | 592 |
| 2022 | 4 | 2 | 594 | 0 | 45 | 645 |
| 2023 | 8 | 9 | 486 | 0 | 35 | 538 |
| 2024 | 15 | 4 | 532 | 0 | 37 | 588 |
| 2025 | 0 | 0 | 4 | 0 | 0 | 4 |
| Total | 104 | 217 | 7465 | 3 | 615 | 8404 |