

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 4 | 3 | 0 | 0 | 7 |
| 1970 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1971 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1972 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1973 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1974 | 0 | 1 | 2 | 0 | 0 | 3 |
| 1975 | 1 | 0 | 3 | 0 | 0 | 4 |
| 1976 | 0 | 2 | 1 | 0 | 0 | 3 |
| 1977 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1978 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1979 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1980 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1981 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1982 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1983 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1984 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1985 | 1 | 0 | 3 | 0 | 0 | 4 |
| 1986 | 0 | 1 | 1 | 0 | 0 | 2 |
| 1987 | 0 | 1 | 2 | 0 | 0 | 3 |
| 1988 | 0 | 2 | 5 | 0 | 0 | 7 |
| 1989 | 0 | 4 | 6 | 0 | 0 | 10 |
| 1990 | 0 | 12 | 2 | 0 | 0 | 14 |
| 1991 | 3 | 9 | 2 | 0 | 0 | 14 |
| 1992 | 2 | 36 | 6 | 0 | 0 | 44 |
| 1993 | 0 | 77 | 6 | 0 | 0 | 83 |
| 1994 | 2 | 114 | 9 | 0 | 0 | 125 |
| 1995 | 1 | 130 | 5 | 0 | 0 | 136 |
| 1996 | 0 | 147 | 4 | 0 | 0 | 151 |
| 1997 | 0 | 75 | 8 | 0 | 0 | 83 |
| 1998 | 0 | 113 | 6 | 0 | 0 | 119 |
| 1999 | 0 | 45 | 4 | 0 | 0 | 49 |
| 2000 | 0 | 115 | 9 | 0 | 0 | 124 |
| 2001 | 0 | 91 | 7 | 0 | 0 | 98 |
| 2002 | 0 | 149 | 13 | 0 | 0 | 162 |
| 2003 | 0 | 72 | 10 | 0 | 0 | 82 |
| 2004 | 1 | 126 | 4 | 0 | 0 | 131 |
| 2005 | 0 | 74 | 10 | 0 | 0 | 84 |
| 2006 | 0 | 44 | 8 | 0 | 0 | 52 |
| 2007 | 0 | 55 | 21 | 0 | 0 | 76 |
| 2008 | 0 | 74 | 24 | 0 | 0 | 98 |
| 2009 | 0 | 50 | 27 | 0 | 0 | 77 |
| 2010 | 0 | 41 | 52 | 0 | 0 | 93 |
| 2011 | 0 | 21 | 38 | 0 | 0 | 59 |
| 2012 | 0 | 100 | 28 | 0 | 0 | 128 |
| 2013 | 1 | 129 | 37 | 0 | 0 | 167 |
| 2014 | 1 | 144 | 59 | 0 | 0 | 204 |
| 2015 | 0 | 162 | 74 | 0 | 0 | 236 |
| 2016 | 0 | 254 | 62 | 0 | 0 | 316 |
| 2017 | 3 | 273 | 52 | 0 | 0 | 328 |
| 2018 | 6 | 280 | 79 | 0 | 0 | 365 |
| 2019 | 1 | 291 | 100 | 0 | 0 | 392 |
| 2020 | 1 | 266 | 107 | 0 | 0 | 374 |
| 2021 | 1 | 313 | 90 | 0 | 0 | 404 |
| 2022 | 0 | 306 | 112 | 0 | 0 | 418 |
| 2023 | 2 | 397 | 65 | 0 | 0 | 464 |
| 2024 | 1 | 438 | 51 | 0 | 0 | 490 |
| 2025 | 0 | 0 | 6 | 0 | 0 | 6 |
| Total | 28 | 5038 | 1229 | 0 | 0 | 6295 |