

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 2 | 2 | 4 | 0 | 94 | 102 |
| 1970 | 0 | 0 | 2 | 0 | 3 | 5 |
| 1971 | 1 | 0 | 0 | 0 | 7 | 8 |
| 1972 | 0 | 0 | 0 | 0 | 5 | 5 |
| 1973 | 0 | 2 | 1 | 0 | 4 | 7 |
| 1974 | 0 | 2 | 2 | 0 | 5 | 9 |
| 1975 | 0 | 1 | 3 | 0 | 5 | 9 |
| 1976 | 0 | 2 | 2 | 0 | 5 | 9 |
| 1977 | 0 | 2 | 3 | 0 | 8 | 13 |
| 1978 | 0 | 0 | 2 | 0 | 5 | 7 |
| 1979 | 0 | 0 | 10 | 0 | 7 | 17 |
| 1980 | 0 | 1 | 4 | 0 | 7 | 12 |
| 1981 | 0 | 1 | 4 | 0 | 8 | 13 |
| 1982 | 0 | 1 | 3 | 0 | 9 | 13 |
| 1983 | 0 | 3 | 1 | 0 | 8 | 12 |
| 1984 | 0 | 2 | 2 | 0 | 11 | 15 |
| 1985 | 0 | 2 | 1 | 0 | 6 | 9 |
| 1986 | 0 | 9 | 10 | 0 | 12 | 31 |
| 1987 | 0 | 5 | 12 | 0 | 12 | 29 |
| 1988 | 0 | 3 | 6 | 0 | 13 | 22 |
| 1989 | 0 | 8 | 7 | 0 | 8 | 23 |
| 1990 | 0 | 23 | 7 | 0 | 9 | 39 |
| 1991 | 1 | 21 | 20 | 0 | 7 | 49 |
| 1992 | 2 | 15 | 29 | 0 | 6 | 52 |
| 1993 | 2 | 19 | 46 | 0 | 9 | 76 |
| 1994 | 1 | 55 | 113 | 0 | 9 | 178 |
| 1995 | 3 | 21 | 135 | 0 | 10 | 169 |
| 1996 | 7 | 46 | 123 | 0 | 11 | 187 |
| 1997 | 1 | 53 | 241 | 0 | 12 | 307 |
| 1998 | 0 | 45 | 247 | 0 | 10 | 302 |
| 1999 | 0 | 32 | 146 | 0 | 12 | 190 |
| 2000 | 2 | 48 | 250 | 0 | 16 | 316 |
| 2001 | 4 | 29 | 363 | 0 | 13 | 409 |
| 2002 | 2 | 42 | 266 | 0 | 10 | 320 |
| 2003 | 0 | 26 | 327 | 0 | 15 | 368 |
| 2004 | 2 | 54 | 262 | 0 | 12 | 330 |
| 2005 | 2 | 137 | 321 | 0 | 13 | 473 |
| 2006 | 2 | 146 | 221 | 0 | 13 | 382 |
| 2007 | 1 | 29 | 147 | 3 | 18 | 198 |
| 2008 | 0 | 39 | 88 | 5 | 7 | 139 |
| 2009 | 0 | 66 | 137 | 0 | 12 | 215 |
| 2010 | 2 | 122 | 125 | 0 | 16 | 265 |
| 2011 | 0 | 168 | 150 | 0 | 16 | 334 |
| 2012 | 1 | 234 | 145 | 0 | 21 | 401 |
| 2013 | 1 | 226 | 107 | 0 | 15 | 349 |
| 2014 | 2 | 292 | 105 | 0 | 22 | 421 |
| 2015 | 0 | 339 | 156 | 0 | 25 | 520 |
| 2016 | 0 | 405 | 231 | 0 | 40 | 676 |
| 2017 | 1 | 527 | 288 | 0 | 40 | 856 |
| 2018 | 3 | 588 | 277 | 0 | 23 | 891 |
| 2019 | 1 | 617 | 286 | 1 | 41 | 946 |
| 2020 | 1 | 691 | 375 | 0 | 34 | 1101 |
| 2021 | 1 | 644 | 269 | 1 | 36 | 951 |
| 2022 | 1 | 651 | 386 | 0 | 34 | 1072 |
| 2023 | 2 | 873 | 262 | 0 | 31 | 1168 |
| 2024 | 3 | 828 | 307 | 0 | 39 | 1177 |
| 2025 | 0 | 17 | 27 | 0 | 3 | 47 |
| Total | 54 | 8214 | 7064 | 10 | 902 | 16244 |