*Excludes Observations that spanned multiple years
| B | b | t | W | w | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 1 | 0 | 18 | 0 | 77 | 96 |
| 1970 | 0 | 2 | 0 | 0 | 4 | 6 |
| 1971 | 0 | 1 | 1 | 0 | 8 | 10 |
| 1972 | 0 | 1 | 0 | 0 | 6 | 7 |
| 1973 | 0 | 1 | 0 | 0 | 6 | 7 |
| 1974 | 0 | 1 | 7 | 0 | 4 | 12 |
| 1975 | 1 | 0 | 5 | 0 | 8 | 14 |
| 1976 | 0 | 1 | 2 | 0 | 7 | 10 |
| 1977 | 0 | 2 | 7 | 0 | 9 | 18 |
| 1978 | 0 | 1 | 3 | 0 | 9 | 13 |
| 1979 | 0 | 1 | 5 | 0 | 9 | 15 |
| 1980 | 0 | 1 | 2 | 0 | 12 | 15 |
| 1981 | 0 | 1 | 3 | 0 | 9 | 13 |
| 1982 | 0 | 2 | 7 | 0 | 13 | 22 |
| 1983 | 0 | 1 | 5 | 0 | 12 | 18 |
| 1984 | 0 | 2 | 7 | 0 | 13 | 22 |
| 1985 | 0 | 2 | 6 | 0 | 10 | 18 |
| 1986 | 0 | 5 | 8 | 0 | 14 | 27 |
| 1987 | 0 | 5 | 10 | 0 | 15 | 30 |
| 1988 | 0 | 10 | 8 | 0 | 16 | 34 |
| 1989 | 0 | 31 | 13 | 0 | 14 | 58 |
| 1990 | 1 | 5 | 9 | 0 | 11 | 26 |
| 1991 | 2 | 17 | 23 | 1 | 14 | 57 |
| 1992 | 4 | 20 | 16 | 0 | 11 | 51 |
| 1993 | 1 | 64 | 18 | 0 | 14 | 97 |
| 1994 | 1 | 563 | 35 | 0 | 20 | 619 |
| 1995 | 3 | 586 | 34 | 2 | 17 | 642 |
| 1996 | 1 | 478 | 20 | 1 | 14 | 514 |
| 1997 | 1 | 42 | 29 | 0 | 19 | 91 |
| 1998 | 1 | 364 | 34 | 0 | 13 | 412 |
| 1999 | 0 | 24 | 16 | 0 | 13 | 53 |
| 2000 | 3 | 406 | 54 | 1 | 22 | 486 |
| 2001 | 1 | 253 | 54 | 0 | 21 | 329 |
| 2002 | 1 | 426 | 49 | 1 | 12 | 489 |
| 2003 | 0 | 200 | 59 | 0 | 14 | 273 |
| 2004 | 0 | 450 | 46 | 1 | 21 | 518 |
| 2005 | 0 | 38 | 50 | 1 | 21 | 110 |
| 2006 | 0 | 247 | 109 | 1 | 19 | 376 |
| 2007 | 3 | 188 | 117 | 0 | 22 | 330 |
| 2008 | 1 | 57 | 136 | 0 | 24 | 218 |
| 2009 | 0 | 162 | 129 | 1 | 28 | 320 |
| 2010 | 4 | 134 | 191 | 0 | 31 | 360 |
| 2011 | 2 | 182 | 275 | 0 | 64 | 523 |
| 2012 | 0 | 114 | 270 | 1 | 50 | 435 |
| 2013 | 0 | 154 | 456 | 1 | 58 | 669 |
| 2014 | 3 | 70 | 463 | 0 | 72 | 608 |
| 2015 | 1 | 80 | 537 | 0 | 122 | 740 |
| 2016 | 2 | 146 | 571 | 0 | 110 | 829 |
| 2017 | 2 | 114 | 914 | 0 | 141 | 1171 |
| 2018 | 1 | 77 | 738 | 1 | 145 | 962 |
| 2019 | 2 | 54 | 797 | 2 | 116 | 971 |
| 2020 | 8 | 48 | 1005 | 0 | 173 | 1234 |
| 2021 | 9 | 85 | 1106 | 1 | 213 | 1414 |
| 2022 | 8 | 13 | 915 | 0 | 130 | 1066 |
| 2023 | 4 | 125 | 868 | 1 | 174 | 1172 |
| 2024 | 6 | 57 | 1141 | 0 | 163 | 1367 |
| 2025 | 1 | 1 | 79 | 0 | 2 | 83 |
| 2026 | 0 | 0 | 0 | 0 | 1 | 1 |
| Total | 79 | 6115 | 11480 | 17 | 2390 | 20081 |