

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 6 | 6 | 0 | 108 | 120 |
| 1970 | 0 | 0 | 1 | 0 | 4 | 5 |
| 1971 | 0 | 3 | 0 | 0 | 9 | 12 |
| 1972 | 0 | 0 | 1 | 0 | 7 | 8 |
| 1973 | 0 | 0 | 1 | 0 | 8 | 9 |
| 1974 | 0 | 0 | 3 | 0 | 6 | 9 |
| 1975 | 0 | 1 | 1 | 0 | 9 | 11 |
| 1976 | 0 | 1 | 2 | 0 | 15 | 18 |
| 1977 | 0 | 0 | 5 | 0 | 14 | 19 |
| 1978 | 0 | 0 | 3 | 0 | 11 | 14 |
| 1979 | 0 | 0 | 3 | 0 | 15 | 18 |
| 1980 | 0 | 0 | 2 | 0 | 18 | 20 |
| 1981 | 0 | 0 | 4 | 0 | 19 | 23 |
| 1982 | 0 | 0 | 5 | 0 | 21 | 26 |
| 1983 | 0 | 0 | 1 | 0 | 16 | 17 |
| 1984 | 0 | 0 | 0 | 0 | 21 | 21 |
| 1985 | 0 | 1 | 7 | 1 | 20 | 29 |
| 1986 | 0 | 3 | 8 | 0 | 22 | 33 |
| 1987 | 0 | 1 | 16 | 0 | 25 | 42 |
| 1988 | 0 | 2 | 6 | 0 | 23 | 31 |
| 1989 | 1 | 5 | 10 | 0 | 20 | 36 |
| 1990 | 1 | 8 | 9 | 1 | 21 | 40 |
| 1991 | 2 | 9 | 18 | 0 | 17 | 46 |
| 1992 | 2 | 8 | 14 | 0 | 22 | 46 |
| 1993 | 4 | 12 | 26 | 2 | 26 | 70 |
| 1994 | 5 | 22 | 61 | 0 | 29 | 117 |
| 1995 | 2 | 13 | 44 | 3 | 26 | 88 |
| 1996 | 1 | 14 | 43 | 1 | 20 | 79 |
| 1997 | 1 | 10 | 38 | 0 | 33 | 82 |
| 1998 | 2 | 24 | 45 | 0 | 26 | 97 |
| 1999 | 1 | 13 | 13 | 0 | 25 | 52 |
| 2000 | 3 | 12 | 48 | 0 | 42 | 105 |
| 2001 | 0 | 16 | 37 | 0 | 34 | 87 |
| 2002 | 2 | 23 | 63 | 2 | 18 | 108 |
| 2003 | 6 | 27 | 97 | 3 | 29 | 162 |
| 2004 | 0 | 24 | 135 | 1 | 33 | 193 |
| 2005 | 1 | 51 | 73 | 1 | 37 | 163 |
| 2006 | 5 | 32 | 92 | 2 | 34 | 165 |
| 2007 | 5 | 31 | 104 | 2 | 43 | 185 |
| 2008 | 2 | 27 | 146 | 7 | 30 | 212 |
| 2009 | 1 | 43 | 125 | 1 | 49 | 219 |
| 2010 | 2 | 46 | 151 | 2 | 60 | 261 |
| 2011 | 0 | 53 | 217 | 0 | 72 | 342 |
| 2012 | 11 | 135 | 261 | 1 | 106 | 514 |
| 2013 | 6 | 209 | 317 | 3 | 98 | 633 |
| 2014 | 6 | 223 | 305 | 2 | 133 | 669 |
| 2015 | 9 | 235 | 450 | 4 | 201 | 899 |
| 2016 | 6 | 247 | 448 | 2 | 232 | 935 |
| 2017 | 7 | 267 | 545 | 3 | 235 | 1057 |
| 2018 | 4 | 283 | 508 | 5 | 232 | 1032 |
| 2019 | 13 | 354 | 667 | 9 | 233 | 1276 |
| 2020 | 5 | 347 | 968 | 1 | 286 | 1607 |
| 2021 | 2 | 357 | 903 | 1 | 411 | 1674 |
| 2022 | 2 | 454 | 1085 | 1 | 308 | 1850 |
| 2023 | 17 | 577 | 775 | 0 | 332 | 1701 |
| 2024 | 6 | 616 | 908 | 0 | 376 | 1906 |
| 2025 | 0 | 0 | 16 | 0 | 7 | 23 |
| Total | 143 | 4845 | 9840 | 61 | 4327 | 19216 |