

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 2 | 0 | 28 | 0 | 24 | 54 |
| 1970 | 0 | 1 | 4 | 0 | 3 | 8 |
| 1971 | 1 | 0 | 4 | 0 | 4 | 9 |
| 1972 | 1 | 0 | 3 | 0 | 5 | 9 |
| 1973 | 0 | 0 | 2 | 0 | 4 | 6 |
| 1974 | 0 | 0 | 5 | 0 | 3 | 8 |
| 1975 | 0 | 1 | 7 | 0 | 4 | 12 |
| 1976 | 1 | 0 | 7 | 0 | 6 | 14 |
| 1977 | 1 | 0 | 11 | 0 | 5 | 17 |
| 1978 | 0 | 0 | 18 | 0 | 8 | 26 |
| 1979 | 9 | 0 | 20 | 0 | 6 | 35 |
| 1980 | 18 | 3 | 6 | 0 | 5 | 32 |
| 1981 | 2 | 2 | 22 | 0 | 13 | 39 |
| 1982 | 8 | 1 | 18 | 0 | 11 | 38 |
| 1983 | 16 | 2 | 16 | 0 | 9 | 43 |
| 1984 | 13 | 8 | 6 | 0 | 5 | 32 |
| 1985 | 0 | 1 | 5 | 0 | 4 | 10 |
| 1986 | 1 | 2 | 24 | 0 | 12 | 39 |
| 1987 | 0 | 6 | 29 | 2 | 18 | 55 |
| 1988 | 2 | 4 | 37 | 0 | 13 | 56 |
| 1989 | 2 | 8 | 36 | 0 | 15 | 61 |
| 1990 | 29 | 37 | 45 | 0 | 13 | 124 |
| 1991 | 19 | 30 | 69 | 0 | 12 | 130 |
| 1992 | 11 | 8 | 91 | 0 | 13 | 123 |
| 1993 | 12 | 17 | 191 | 0 | 21 | 241 |
| 1994 | 15 | 55 | 303 | 0 | 19 | 392 |
| 1995 | 9 | 17 | 241 | 0 | 24 | 291 |
| 1996 | 9 | 35 | 213 | 0 | 18 | 275 |
| 1997 | 12 | 39 | 190 | 0 | 23 | 264 |
| 1998 | 9 | 61 | 223 | 0 | 18 | 311 |
| 1999 | 11 | 31 | 124 | 0 | 21 | 187 |
| 2000 | 6 | 40 | 247 | 0 | 29 | 322 |
| 2001 | 24 | 13 | 275 | 0 | 23 | 335 |
| 2002 | 10 | 5 | 289 | 0 | 18 | 322 |
| 2003 | 29 | 16 | 326 | 0 | 20 | 391 |
| 2004 | 23 | 10 | 333 | 0 | 16 | 382 |
| 2005 | 15 | 11 | 269 | 0 | 25 | 320 |
| 2006 | 28 | 18 | 342 | 0 | 32 | 420 |
| 2007 | 23 | 21 | 367 | 12 | 36 | 459 |
| 2008 | 35 | 42 | 438 | 10 | 30 | 555 |
| 2009 | 25 | 23 | 557 | 0 | 49 | 654 |
| 2010 | 39 | 23 | 572 | 0 | 45 | 679 |
| 2011 | 33 | 16 | 701 | 1 | 62 | 813 |
| 2012 | 51 | 19 | 877 | 0 | 121 | 1068 |
| 2013 | 44 | 35 | 1320 | 3 | 177 | 1579 |
| 2014 | 66 | 107 | 1388 | 2 | 234 | 1797 |
| 2015 | 151 | 49 | 1712 | 2 | 371 | 2285 |
| 2016 | 141 | 26 | 2117 | 5 | 491 | 2780 |
| 2017 | 124 | 49 | 2796 | 2 | 543 | 3514 |
| 2018 | 101 | 45 | 3110 | 5 | 578 | 3839 |
| 2019 | 77 | 57 | 3308 | 5 | 540 | 3987 |
| 2020 | 88 | 35 | 3620 | 2 | 626 | 4371 |
| 2021 | 56 | 36 | 3766 | 0 | 609 | 4467 |
| 2022 | 108 | 32 | 3953 | 4 | 702 | 4799 |
| 2023 | 101 | 26 | 3524 | 0 | 628 | 4279 |
| 2024 | 140 | 36 | 3942 | 0 | 752 | 4870 |
| 2025 | 2 | 1 | 65 | 0 | 11 | 79 |
| Total | 1753 | 1160 | 42212 | 55 | 7127 | 52307 |