

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 5 | 2 | 12 | 0 | 0 | 19 |
| 1970 | 0 | 0 | 3 | 0 | 0 | 3 |
| 1971 | 0 | 2 | 0 | 0 | 0 | 2 |
| 1972 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1973 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1974 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1975 | 1 | 15 | 2 | 0 | 0 | 18 |
| 1976 | 0 | 2 | 3 | 0 | 0 | 5 |
| 1977 | 0 | 0 | 9 | 0 | 0 | 9 |
| 1978 | 0 | 0 | 6 | 0 | 0 | 6 |
| 1979 | 0 | 6 | 6 | 0 | 0 | 12 |
| 1980 | 0 | 3 | 7 | 0 | 0 | 10 |
| 1981 | 0 | 0 | 5 | 0 | 0 | 5 |
| 1982 | 0 | 1 | 6 | 0 | 0 | 7 |
| 1983 | 0 | 1 | 7 | 0 | 0 | 8 |
| 1984 | 0 | 1 | 3 | 0 | 0 | 4 |
| 1985 | 0 | 1 | 3 | 0 | 0 | 4 |
| 1986 | 0 | 7 | 2 | 0 | 0 | 9 |
| 1987 | 1 | 1 | 3 | 0 | 0 | 5 |
| 1988 | 1 | 12 | 15 | 0 | 0 | 28 |
| 1989 | 1 | 13 | 16 | 0 | 0 | 30 |
| 1990 | 2 | 26 | 9 | 0 | 0 | 37 |
| 1991 | 8 | 10 | 4 | 0 | 0 | 22 |
| 1992 | 0 | 7 | 9 | 0 | 0 | 16 |
| 1993 | 1 | 25 | 22 | 0 | 0 | 48 |
| 1994 | 0 | 46 | 29 | 0 | 0 | 75 |
| 1995 | 1 | 111 | 11 | 0 | 0 | 123 |
| 1996 | 6 | 57 | 16 | 0 | 0 | 79 |
| 1997 | 0 | 577 | 14 | 0 | 0 | 591 |
| 1998 | 4 | 407 | 37 | 0 | 0 | 448 |
| 1999 | 1 | 452 | 24 | 0 | 0 | 477 |
| 2000 | 0 | 449 | 17 | 0 | 0 | 466 |
| 2001 | 1 | 332 | 9 | 0 | 0 | 342 |
| 2002 | 0 | 539 | 46 | 0 | 0 | 585 |
| 2003 | 1 | 754 | 39 | 0 | 0 | 794 |
| 2004 | 0 | 575 | 51 | 0 | 0 | 626 |
| 2005 | 3 | 485 | 66 | 0 | 0 | 554 |
| 2006 | 6 | 595 | 124 | 0 | 0 | 725 |
| 2007 | 3 | 494 | 52 | 0 | 0 | 549 |
| 2008 | 2 | 312 | 60 | 0 | 0 | 374 |
| 2009 | 2 | 397 | 98 | 0 | 0 | 497 |
| 2010 | 3 | 447 | 69 | 0 | 0 | 519 |
| 2011 | 4 | 487 | 127 | 0 | 0 | 618 |
| 2012 | 7 | 852 | 160 | 0 | 0 | 1019 |
| 2013 | 1 | 357 | 124 | 0 | 0 | 482 |
| 2014 | 0 | 322 | 36 | 0 | 0 | 358 |
| 2015 | 0 | 363 | 44 | 0 | 0 | 407 |
| 2016 | 0 | 482 | 105 | 0 | 0 | 587 |
| 2017 | 1 | 365 | 86 | 0 | 0 | 452 |
| 2018 | 1 | 426 | 73 | 0 | 0 | 500 |
| 2019 | 0 | 279 | 59 | 0 | 0 | 338 |
| 2020 | 3 | 396 | 168 | 0 | 0 | 567 |
| 2021 | 2 | 373 | 86 | 0 | 0 | 461 |
| 2022 | 1 | 425 | 155 | 0 | 0 | 581 |
| 2023 | 3 | 419 | 65 | 0 | 0 | 487 |
| 2024 | 6 | 569 | 90 | 0 | 0 | 665 |
| 2025 | 0 | 0 | 6 | 0 | 0 | 6 |
| Total | 82 | 13280 | 2301 | 0 | 0 | 15663 |