

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 3 | 1 | 0 | 0 | 4 |
| 1970 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1971 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1972 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1973 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1974 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1975 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1976 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1977 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1978 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1979 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1980 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1981 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1982 | 0 | 1 | 1 | 0 | 0 | 2 |
| 1983 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1984 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1985 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1986 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1987 | 0 | 1 | 12 | 0 | 0 | 13 |
| 1988 | 0 | 0 | 14 | 0 | 0 | 14 |
| 1989 | 0 | 2 | 18 | 0 | 0 | 20 |
| 1990 | 0 | 4 | 3 | 0 | 0 | 7 |
| 1991 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1992 | 0 | 120 | 0 | 0 | 0 | 120 |
| 1993 | 0 | 271 | 3 | 0 | 0 | 274 |
| 1994 | 0 | 578 | 15 | 0 | 0 | 593 |
| 1995 | 0 | 520 | 5 | 0 | 0 | 525 |
| 1996 | 0 | 617 | 1 | 0 | 0 | 618 |
| 1997 | 0 | 511 | 2 | 0 | 0 | 513 |
| 1998 | 0 | 200 | 3 | 0 | 0 | 203 |
| 1999 | 0 | 56 | 3 | 0 | 0 | 59 |
| 2000 | 0 | 387 | 14 | 0 | 0 | 401 |
| 2001 | 0 | 314 | 12 | 0 | 0 | 326 |
| 2002 | 1 | 405 | 16 | 0 | 0 | 422 |
| 2003 | 0 | 348 | 18 | 0 | 0 | 366 |
| 2004 | 0 | 402 | 11 | 0 | 0 | 413 |
| 2005 | 0 | 95 | 11 | 0 | 0 | 106 |
| 2006 | 0 | 146 | 10 | 0 | 0 | 156 |
| 2007 | 0 | 335 | 25 | 0 | 0 | 360 |
| 2008 | 1 | 214 | 28 | 0 | 0 | 243 |
| 2009 | 0 | 10 | 22 | 0 | 0 | 32 |
| 2010 | 0 | 143 | 50 | 0 | 0 | 193 |
| 2011 | 0 | 87 | 29 | 0 | 0 | 116 |
| 2012 | 1 | 148 | 34 | 0 | 0 | 183 |
| 2013 | 1 | 262 | 39 | 0 | 0 | 302 |
| 2014 | 3 | 310 | 76 | 0 | 0 | 389 |
| 2015 | 1 | 360 | 75 | 0 | 0 | 436 |
| 2016 | 3 | 387 | 89 | 0 | 0 | 479 |
| 2017 | 0 | 385 | 94 | 0 | 0 | 479 |
| 2018 | 0 | 446 | 152 | 0 | 0 | 598 |
| 2019 | 1 | 390 | 139 | 0 | 0 | 530 |
| 2020 | 1 | 491 | 203 | 0 | 0 | 695 |
| 2021 | 1 | 388 | 121 | 0 | 0 | 510 |
| 2022 | 2 | 443 | 199 | 0 | 0 | 644 |
| 2023 | 1 | 514 | 129 | 0 | 0 | 644 |
| 2024 | 1 | 624 | 115 | 0 | 0 | 740 |
| 2025 | 0 | 0 | 2 | 0 | 0 | 2 |
| Total | 18 | 10921 | 1801 | 0 | 0 | 12740 |