

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 4 | 6 | 8 | 0 | 0 | 18 |
| 1970 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1971 | 0 | 2 | 0 | 0 | 0 | 2 |
| 1972 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1973 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1974 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1975 | 0 | 6 | 2 | 0 | 0 | 8 |
| 1976 | 0 | 1 | 4 | 0 | 0 | 5 |
| 1977 | 0 | 0 | 9 | 0 | 0 | 9 |
| 1978 | 0 | 1 | 4 | 0 | 0 | 5 |
| 1979 | 0 | 2 | 3 | 0 | 0 | 5 |
| 1980 | 0 | 0 | 6 | 0 | 0 | 6 |
| 1981 | 0 | 0 | 5 | 0 | 0 | 5 |
| 1982 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1983 | 0 | 0 | 4 | 0 | 0 | 4 |
| 1984 | 0 | 2 | 2 | 0 | 0 | 4 |
| 1985 | 0 | 2 | 1 | 0 | 0 | 3 |
| 1986 | 0 | 4 | 1 | 0 | 0 | 5 |
| 1987 | 2 | 5 | 7 | 0 | 0 | 14 |
| 1988 | 0 | 7 | 7 | 0 | 0 | 14 |
| 1989 | 1 | 9 | 12 | 0 | 0 | 22 |
| 1990 | 3 | 21 | 21 | 0 | 0 | 45 |
| 1991 | 1 | 10 | 6 | 0 | 0 | 17 |
| 1992 | 3 | 9 | 11 | 0 | 0 | 23 |
| 1993 | 1 | 18 | 18 | 0 | 0 | 37 |
| 1994 | 0 | 59 | 28 | 0 | 0 | 87 |
| 1995 | 3 | 37 | 21 | 0 | 0 | 61 |
| 1996 | 5 | 38 | 18 | 0 | 0 | 61 |
| 1997 | 5 | 127 | 21 | 0 | 0 | 153 |
| 1998 | 4 | 116 | 20 | 0 | 0 | 140 |
| 1999 | 3 | 103 | 23 | 0 | 0 | 129 |
| 2000 | 1 | 107 | 29 | 0 | 0 | 137 |
| 2001 | 0 | 145 | 29 | 0 | 0 | 174 |
| 2002 | 0 | 133 | 52 | 0 | 0 | 185 |
| 2003 | 3 | 159 | 38 | 0 | 0 | 200 |
| 2004 | 1 | 280 | 50 | 0 | 0 | 331 |
| 2005 | 2 | 138 | 88 | 0 | 0 | 228 |
| 2006 | 3 | 160 | 99 | 0 | 0 | 262 |
| 2007 | 4 | 170 | 104 | 0 | 0 | 278 |
| 2008 | 5 | 152 | 128 | 0 | 0 | 285 |
| 2009 | 2 | 115 | 117 | 0 | 0 | 234 |
| 2010 | 3 | 81 | 172 | 0 | 0 | 256 |
| 2011 | 1 | 119 | 179 | 0 | 0 | 299 |
| 2012 | 6 | 213 | 131 | 0 | 0 | 350 |
| 2013 | 8 | 330 | 195 | 0 | 0 | 533 |
| 2014 | 8 | 324 | 153 | 0 | 0 | 485 |
| 2015 | 11 | 359 | 184 | 0 | 0 | 554 |
| 2016 | 14 | 394 | 200 | 0 | 0 | 608 |
| 2017 | 12 | 505 | 237 | 0 | 0 | 754 |
| 2018 | 15 | 581 | 250 | 0 | 0 | 846 |
| 2019 | 7 | 505 | 280 | 0 | 0 | 792 |
| 2020 | 10 | 648 | 305 | 0 | 0 | 963 |
| 2021 | 6 | 660 | 389 | 0 | 0 | 1055 |
| 2022 | 9 | 666 | 384 | 0 | 1 | 1060 |
| 2023 | 15 | 865 | 234 | 0 | 0 | 1114 |
| 2024 | 19 | 928 | 312 | 0 | 0 | 1259 |
| 2025 | 2 | 4 | 18 | 0 | 0 | 24 |
| Total | 202 | 9326 | 4625 | 0 | 1 | 14154 |