*Excludes Observations that spanned multiple years
| B | b | t | W | w | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 1 | 8 | 19 | 0 | 6 | 34 |
| 1970 | 0 | 0 | 9 | 0 | 0 | 9 |
| 1971 | 0 | 11 | 0 | 0 | 3 | 14 |
| 1972 | 0 | 0 | 2 | 0 | 1 | 3 |
| 1973 | 0 | 1 | 1 | 0 | 1 | 3 |
| 1974 | 0 | 1 | 5 | 0 | 0 | 6 |
| 1975 | 2 | 4 | 8 | 0 | 1 | 15 |
| 1976 | 0 | 1 | 7 | 0 | 4 | 12 |
| 1977 | 0 | 0 | 14 | 0 | 2 | 16 |
| 1978 | 0 | 2 | 3 | 0 | 0 | 5 |
| 1979 | 0 | 3 | 12 | 0 | 3 | 18 |
| 1980 | 1 | 4 | 8 | 0 | 3 | 16 |
| 1981 | 0 | 1 | 10 | 0 | 8 | 19 |
| 1982 | 0 | 1 | 13 | 0 | 5 | 19 |
| 1983 | 0 | 4 | 9 | 0 | 6 | 19 |
| 1984 | 0 | 3 | 7 | 0 | 6 | 16 |
| 1985 | 0 | 3 | 4 | 0 | 7 | 14 |
| 1986 | 0 | 7 | 8 | 0 | 3 | 18 |
| 1987 | 0 | 4 | 14 | 0 | 5 | 23 |
| 1988 | 1 | 9 | 15 | 0 | 4 | 29 |
| 1989 | 0 | 14 | 18 | 0 | 9 | 41 |
| 1990 | 1 | 59 | 28 | 1 | 7 | 96 |
| 1991 | 2 | 24 | 25 | 1 | 3 | 55 |
| 1992 | 3 | 7 | 38 | 0 | 7 | 55 |
| 1993 | 1 | 36 | 46 | 0 | 7 | 90 |
| 1994 | 3 | 100 | 142 | 0 | 9 | 254 |
| 1995 | 8 | 79 | 117 | 1 | 11 | 216 |
| 1996 | 6 | 76 | 140 | 0 | 7 | 229 |
| 1997 | 3 | 99 | 529 | 0 | 9 | 640 |
| 1998 | 6 | 100 | 407 | 0 | 10 | 523 |
| 1999 | 4 | 74 | 384 | 0 | 10 | 472 |
| 2000 | 4 | 60 | 585 | 0 | 18 | 667 |
| 2001 | 4 | 27 | 579 | 1 | 20 | 631 |
| 2002 | 1 | 43 | 730 | 0 | 2 | 776 |
| 2003 | 4 | 66 | 974 | 0 | 15 | 1059 |
| 2004 | 5 | 244 | 1297 | 0 | 15 | 1561 |
| 2005 | 3 | 209 | 633 | 0 | 17 | 862 |
| 2006 | 5 | 87 | 934 | 0 | 16 | 1042 |
| 2007 | 3 | 78 | 874 | 1 | 22 | 978 |
| 2008 | 6 | 240 | 622 | 1 | 12 | 881 |
| 2009 | 4 | 476 | 410 | 0 | 19 | 909 |
| 2010 | 5 | 456 | 425 | 0 | 18 | 904 |
| 2011 | 2 | 208 | 438 | 0 | 18 | 666 |
| 2012 | 10 | 583 | 526 | 0 | 32 | 1151 |
| 2013 | 8 | 675 | 593 | 1 | 27 | 1304 |
| 2014 | 6 | 1034 | 446 | 1 | 40 | 1527 |
| 2015 | 7 | 1069 | 594 | 0 | 70 | 1740 |
| 2016 | 5 | 1169 | 713 | 0 | 100 | 1987 |
| 2017 | 15 | 1282 | 810 | 0 | 70 | 2177 |
| 2018 | 8 | 1446 | 818 | 0 | 55 | 2327 |
| 2019 | 10 | 1565 | 864 | 2 | 71 | 2512 |
| 2020 | 3 | 1428 | 1200 | 0 | 46 | 2677 |
| 2021 | 12 | 1673 | 1187 | 0 | 92 | 2964 |
| 2022 | 10 | 1769 | 730 | 0 | 71 | 2580 |
| 2023 | 1 | 6 | 14 | 0 | 0 | 21 |
| 2024 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 183 | 16628 | 19038 | 10 | 1023 | 36882 |