

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1970 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1971 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1972 | 0 | 0 | 1 | 0 | 2 | 3 |
| 1973 | 0 | 0 | 2 | 0 | 2 | 4 |
| 1974 | 0 | 0 | 1 | 0 | 1 | 2 |
| 1975 | 0 | 0 | 2 | 0 | 3 | 5 |
| 1976 | 0 | 0 | 0 | 0 | 3 | 3 |
| 1977 | 0 | 0 | 3 | 0 | 2 | 5 |
| 1978 | 0 | 0 | 3 | 0 | 2 | 5 |
| 1979 | 0 | 0 | 2 | 0 | 2 | 4 |
| 1980 | 0 | 2 | 10 | 0 | 2 | 14 |
| 1981 | 0 | 0 | 2 | 0 | 5 | 7 |
| 1982 | 0 | 0 | 2 | 0 | 5 | 7 |
| 1983 | 0 | 0 | 4 | 0 | 2 | 6 |
| 1984 | 0 | 0 | 9 | 0 | 4 | 13 |
| 1985 | 6 | 0 | 10 | 0 | 3 | 19 |
| 1986 | 0 | 1 | 20 | 0 | 4 | 25 |
| 1987 | 2 | 2 | 14 | 0 | 5 | 23 |
| 1988 | 11 | 0 | 44 | 0 | 11 | 66 |
| 1989 | 9 | 2 | 58 | 0 | 10 | 79 |
| 1990 | 27 | 3 | 31 | 3 | 9 | 73 |
| 1991 | 9 | 3 | 29 | 0 | 5 | 46 |
| 1992 | 10 | 3 | 21 | 0 | 5 | 39 |
| 1993 | 4 | 2 | 11 | 1 | 11 | 29 |
| 1994 | 1 | 11 | 21 | 0 | 9 | 42 |
| 1995 | 7 | 3 | 25 | 1 | 9 | 45 |
| 1996 | 0 | 5 | 30 | 0 | 8 | 43 |
| 1997 | 1 | 2 | 15 | 0 | 11 | 29 |
| 1998 | 1 | 6 | 12 | 0 | 7 | 26 |
| 1999 | 1 | 2 | 21 | 0 | 11 | 35 |
| 2000 | 3 | 0 | 16 | 0 | 17 | 36 |
| 2001 | 0 | 2 | 27 | 0 | 13 | 42 |
| 2002 | 1 | 0 | 36 | 0 | 10 | 47 |
| 2003 | 5 | 7 | 45 | 0 | 15 | 72 |
| 2004 | 0 | 0 | 40 | 0 | 15 | 55 |
| 2005 | 1 | 0 | 43 | 0 | 19 | 63 |
| 2006 | 10 | 6 | 73 | 0 | 18 | 107 |
| 2007 | 4 | 12 | 96 | 0 | 17 | 129 |
| 2008 | 5 | 7 | 103 | 0 | 19 | 134 |
| 2009 | 10 | 11 | 111 | 0 | 28 | 160 |
| 2010 | 7 | 14 | 87 | 0 | 24 | 132 |
| 2011 | 4 | 4 | 103 | 2 | 26 | 139 |
| 2012 | 2 | 4 | 144 | 3 | 37 | 190 |
| 2013 | 3 | 19 | 211 | 0 | 62 | 295 |
| 2014 | 5 | 15 | 233 | 0 | 53 | 306 |
| 2015 | 9 | 8 | 289 | 1 | 106 | 413 |
| 2016 | 10 | 4 | 356 | 1 | 95 | 466 |
| 2017 | 18 | 6 | 404 | 0 | 106 | 534 |
| 2018 | 15 | 8 | 491 | 1 | 109 | 624 |
| 2019 | 16 | 6 | 495 | 2 | 75 | 594 |
| 2020 | 12 | 6 | 712 | 0 | 138 | 868 |
| 2021 | 14 | 10 | 711 | 1 | 148 | 884 |
| 2022 | 8 | 6 | 925 | 1 | 198 | 1138 |
| 2023 | 19 | 7 | 833 | 0 | 177 | 1036 |
| 2024 | 20 | 12 | 1053 | 0 | 185 | 1270 |
| 2025 | 1 | 1 | 39 | 0 | 4 | 45 |
| Total | 291 | 222 | 8080 | 17 | 1869 | 10479 |