

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 1 | 7 | 0 | 1 | 9 |
| 1970 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1971 | 0 | 2 | 0 | 0 | 0 | 2 |
| 1972 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1973 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1974 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1975 | 0 | 7 | 4 | 0 | 0 | 11 |
| 1976 | 0 | 1 | 5 | 0 | 0 | 6 |
| 1977 | 1 | 0 | 7 | 0 | 0 | 8 |
| 1978 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1979 | 0 | 3 | 3 | 0 | 0 | 6 |
| 1980 | 0 | 3 | 1 | 0 | 0 | 4 |
| 1981 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1982 | 0 | 0 | 9 | 0 | 0 | 9 |
| 1983 | 0 | 0 | 5 | 0 | 0 | 5 |
| 1984 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1985 | 1 | 3 | 1 | 0 | 0 | 5 |
| 1986 | 0 | 2 | 7 | 0 | 0 | 9 |
| 1987 | 0 | 7 | 4 | 0 | 0 | 11 |
| 1988 | 0 | 8 | 7 | 0 | 0 | 15 |
| 1989 | 0 | 6 | 12 | 0 | 0 | 18 |
| 1990 | 2 | 24 | 9 | 0 | 0 | 35 |
| 1991 | 7 | 13 | 20 | 0 | 0 | 40 |
| 1992 | 2 | 14 | 10 | 0 | 0 | 26 |
| 1993 | 3 | 65 | 19 | 0 | 0 | 87 |
| 1994 | 3 | 182 | 25 | 0 | 0 | 210 |
| 1995 | 3 | 102 | 12 | 0 | 0 | 117 |
| 1996 | 10 | 127 | 12 | 0 | 0 | 149 |
| 1997 | 7 | 491 | 18 | 0 | 0 | 516 |
| 1998 | 2 | 509 | 30 | 0 | 0 | 541 |
| 1999 | 2 | 280 | 14 | 0 | 0 | 296 |
| 2000 | 2 | 457 | 32 | 0 | 0 | 491 |
| 2001 | 2 | 409 | 19 | 0 | 0 | 430 |
| 2002 | 0 | 374 | 53 | 0 | 1 | 428 |
| 2003 | 4 | 420 | 49 | 0 | 0 | 473 |
| 2004 | 1 | 559 | 32 | 0 | 0 | 592 |
| 2005 | 0 | 446 | 93 | 0 | 0 | 539 |
| 2006 | 2 | 458 | 62 | 0 | 0 | 522 |
| 2007 | 0 | 460 | 81 | 0 | 0 | 541 |
| 2008 | 0 | 206 | 120 | 0 | 0 | 326 |
| 2009 | 0 | 131 | 132 | 0 | 0 | 263 |
| 2010 | 1 | 246 | 176 | 0 | 0 | 423 |
| 2011 | 0 | 315 | 244 | 0 | 0 | 559 |
| 2012 | 0 | 673 | 197 | 0 | 0 | 870 |
| 2013 | 3 | 553 | 184 | 0 | 0 | 740 |
| 2014 | 0 | 545 | 106 | 0 | 0 | 651 |
| 2015 | 0 | 717 | 195 | 0 | 0 | 912 |
| 2016 | 1 | 705 | 239 | 0 | 0 | 945 |
| 2017 | 3 | 972 | 313 | 0 | 0 | 1288 |
| 2018 | 2 | 889 | 353 | 0 | 1 | 1245 |
| 2019 | 3 | 916 | 361 | 0 | 1 | 1281 |
| 2020 | 2 | 915 | 524 | 0 | 0 | 1441 |
| 2021 | 1 | 977 | 454 | 0 | 0 | 1432 |
| 2022 | 6 | 1069 | 574 | 0 | 0 | 1649 |
| 2023 | 11 | 1344 | 344 | 0 | 0 | 1699 |
| 2024 | 17 | 1249 | 339 | 0 | 0 | 1605 |
| 2025 | 0 | 19 | 22 | 0 | 0 | 41 |
| Total | 104 | 17874 | 5546 | 0 | 4 | 23528 |