

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 4 | 6 | 10 | 3 | 106 | 129 |
| 1970 | 0 | 0 | 1 | 0 | 4 | 5 |
| 1971 | 0 | 2 | 0 | 0 | 9 | 11 |
| 1972 | 0 | 0 | 1 | 0 | 7 | 8 |
| 1973 | 0 | 1 | 0 | 0 | 5 | 6 |
| 1974 | 0 | 0 | 1 | 0 | 7 | 8 |
| 1975 | 0 | 3 | 2 | 0 | 5 | 10 |
| 1976 | 0 | 0 | 3 | 0 | 11 | 14 |
| 1977 | 0 | 1 | 5 | 0 | 12 | 18 |
| 1978 | 0 | 0 | 3 | 0 | 11 | 14 |
| 1979 | 0 | 1 | 7 | 0 | 15 | 23 |
| 1980 | 0 | 2 | 20 | 0 | 14 | 36 |
| 1981 | 0 | 1 | 9 | 0 | 20 | 30 |
| 1982 | 0 | 2 | 9 | 0 | 18 | 29 |
| 1983 | 0 | 2 | 17 | 0 | 17 | 36 |
| 1984 | 0 | 1 | 7 | 0 | 16 | 24 |
| 1985 | 0 | 2 | 3 | 0 | 15 | 20 |
| 1986 | 0 | 2 | 10 | 0 | 17 | 29 |
| 1987 | 0 | 5 | 10 | 0 | 19 | 34 |
| 1988 | 0 | 8 | 11 | 4 | 18 | 41 |
| 1989 | 0 | 5 | 12 | 1 | 20 | 38 |
| 1990 | 1 | 31 | 7 | 3 | 15 | 57 |
| 1991 | 6 | 20 | 14 | 1 | 16 | 57 |
| 1992 | 2 | 8 | 19 | 0 | 15 | 44 |
| 1993 | 4 | 16 | 18 | 1 | 19 | 58 |
| 1994 | 2 | 51 | 43 | 0 | 23 | 119 |
| 1995 | 4 | 20 | 41 | 1 | 19 | 85 |
| 1996 | 7 | 34 | 39 | 0 | 16 | 96 |
| 1997 | 4 | 33 | 305 | 1 | 25 | 368 |
| 1998 | 2 | 44 | 229 | 0 | 27 | 302 |
| 1999 | 1 | 41 | 202 | 0 | 20 | 264 |
| 2000 | 1 | 34 | 322 | 0 | 33 | 390 |
| 2001 | 5 | 23 | 355 | 0 | 23 | 406 |
| 2002 | 3 | 16 | 360 | 0 | 15 | 394 |
| 2003 | 8 | 18 | 451 | 0 | 20 | 497 |
| 2004 | 2 | 155 | 446 | 0 | 21 | 624 |
| 2005 | 2 | 110 | 308 | 0 | 20 | 440 |
| 2006 | 4 | 27 | 463 | 0 | 27 | 521 |
| 2007 | 0 | 46 | 393 | 3 | 29 | 471 |
| 2008 | 2 | 77 | 251 | 10 | 25 | 365 |
| 2009 | 6 | 190 | 166 | 0 | 43 | 405 |
| 2010 | 0 | 183 | 146 | 0 | 35 | 364 |
| 2011 | 2 | 72 | 241 | 0 | 44 | 359 |
| 2012 | 0 | 248 | 382 | 1 | 82 | 713 |
| 2013 | 3 | 262 | 266 | 3 | 73 | 607 |
| 2014 | 3 | 291 | 206 | 1 | 81 | 582 |
| 2015 | 4 | 461 | 342 | 0 | 168 | 975 |
| 2016 | 5 | 459 | 456 | 0 | 208 | 1128 |
| 2017 | 5 | 542 | 548 | 2 | 208 | 1305 |
| 2018 | 3 | 572 | 474 | 3 | 242 | 1294 |
| 2019 | 6 | 552 | 455 | 4 | 173 | 1190 |
| 2020 | 4 | 557 | 613 | 0 | 182 | 1356 |
| 2021 | 2 | 697 | 597 | 1 | 219 | 1516 |
| 2022 | 2 | 727 | 742 | 0 | 255 | 1726 |
| 2023 | 5 | 828 | 516 | 0 | 270 | 1619 |
| 2024 | 14 | 917 | 802 | 0 | 311 | 2044 |
| 2025 | 0 | 1 | 13 | 0 | 2 | 16 |
| Total | 128 | 8407 | 11372 | 43 | 3370 | 23320 |