

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 0 | 1 | 0 | 93 | 94 |
| 1970 | 0 | 0 | 2 | 0 | 4 | 6 |
| 1971 | 0 | 0 | 0 | 0 | 10 | 10 |
| 1972 | 0 | 0 | 0 | 0 | 4 | 4 |
| 1973 | 0 | 0 | 0 | 0 | 7 | 7 |
| 1974 | 0 | 0 | 1 | 0 | 5 | 6 |
| 1975 | 0 | 0 | 1 | 0 | 8 | 9 |
| 1976 | 0 | 0 | 2 | 0 | 13 | 15 |
| 1977 | 0 | 0 | 4 | 0 | 13 | 17 |
| 1978 | 0 | 0 | 1 | 0 | 13 | 14 |
| 1979 | 0 | 0 | 1 | 0 | 15 | 16 |
| 1980 | 0 | 0 | 1 | 0 | 16 | 17 |
| 1981 | 0 | 0 | 2 | 0 | 20 | 22 |
| 1982 | 0 | 0 | 2 | 0 | 25 | 27 |
| 1983 | 0 | 0 | 2 | 0 | 17 | 19 |
| 1984 | 0 | 0 | 1 | 0 | 24 | 25 |
| 1985 | 0 | 0 | 2 | 0 | 21 | 23 |
| 1986 | 0 | 0 | 5 | 0 | 21 | 26 |
| 1987 | 0 | 0 | 8 | 1 | 23 | 32 |
| 1988 | 0 | 0 | 4 | 0 | 26 | 30 |
| 1989 | 0 | 0 | 5 | 0 | 21 | 26 |
| 1990 | 0 | 0 | 3 | 0 | 21 | 24 |
| 1991 | 0 | 0 | 41 | 0 | 21 | 62 |
| 1992 | 0 | 0 | 23 | 0 | 24 | 47 |
| 1993 | 0 | 0 | 23 | 1 | 34 | 58 |
| 1994 | 0 | 0 | 21 | 2 | 32 | 55 |
| 1995 | 0 | 0 | 29 | 1 | 37 | 67 |
| 1996 | 0 | 0 | 29 | 0 | 26 | 55 |
| 1997 | 0 | 0 | 21 | 2 | 35 | 58 |
| 1998 | 0 | 0 | 37 | 0 | 38 | 75 |
| 1999 | 0 | 0 | 36 | 0 | 26 | 62 |
| 2000 | 0 | 0 | 33 | 0 | 40 | 73 |
| 2001 | 0 | 0 | 15 | 0 | 30 | 45 |
| 2002 | 0 | 0 | 19 | 0 | 20 | 39 |
| 2003 | 0 | 0 | 17 | 0 | 19 | 36 |
| 2004 | 0 | 0 | 6 | 0 | 23 | 29 |
| 2005 | 0 | 0 | 30 | 0 | 28 | 58 |
| 2006 | 0 | 0 | 28 | 1 | 34 | 63 |
| 2007 | 0 | 0 | 16 | 3 | 41 | 60 |
| 2008 | 0 | 0 | 26 | 7 | 35 | 68 |
| 2009 | 0 | 0 | 23 | 0 | 46 | 69 |
| 2010 | 0 | 0 | 35 | 0 | 44 | 79 |
| 2011 | 0 | 0 | 60 | 1 | 42 | 103 |
| 2012 | 0 | 0 | 73 | 0 | 80 | 153 |
| 2013 | 0 | 0 | 94 | 0 | 63 | 157 |
| 2014 | 0 | 0 | 129 | 0 | 87 | 216 |
| 2015 | 0 | 0 | 151 | 0 | 146 | 297 |
| 2016 | 0 | 0 | 183 | 0 | 155 | 338 |
| 2017 | 0 | 0 | 170 | 0 | 176 | 346 |
| 2018 | 0 | 0 | 225 | 0 | 149 | 374 |
| 2019 | 0 | 0 | 258 | 2 | 144 | 404 |
| 2020 | 0 | 0 | 409 | 0 | 170 | 579 |
| 2021 | 0 | 0 | 329 | 0 | 219 | 548 |
| 2022 | 0 | 0 | 361 | 0 | 236 | 597 |
| 2023 | 0 | 0 | 321 | 0 | 187 | 508 |
| 2024 | 0 | 0 | 442 | 0 | 266 | 708 |
| 2025 | 0 | 0 | 5 | 0 | 13 | 18 |
| Total | 0 | 0 | 3766 | 21 | 3186 | 6973 |