

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 0 | 7 | 0 | 8 | 15 |
| 1970 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1971 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1972 | 0 | 0 | 3 | 0 | 1 | 4 |
| 1973 | 0 | 0 | 2 | 0 | 1 | 3 |
| 1974 | 0 | 5 | 2 | 0 | 0 | 7 |
| 1975 | 0 | 3 | 2 | 0 | 3 | 8 |
| 1976 | 0 | 1 | 3 | 0 | 5 | 9 |
| 1977 | 0 | 3 | 9 | 0 | 3 | 15 |
| 1978 | 0 | 2 | 7 | 0 | 4 | 13 |
| 1979 | 1 | 0 | 14 | 0 | 2 | 17 |
| 1980 | 1 | 0 | 5 | 0 | 6 | 12 |
| 1981 | 0 | 1 | 8 | 0 | 6 | 15 |
| 1982 | 1 | 1 | 11 | 0 | 6 | 19 |
| 1983 | 0 | 0 | 8 | 0 | 2 | 10 |
| 1984 | 0 | 0 | 4 | 0 | 4 | 8 |
| 1985 | 1 | 3 | 9 | 0 | 5 | 18 |
| 1986 | 0 | 3 | 4 | 0 | 3 | 10 |
| 1987 | 2 | 2 | 16 | 0 | 4 | 24 |
| 1988 | 2 | 6 | 13 | 0 | 7 | 28 |
| 1989 | 5 | 11 | 10 | 0 | 6 | 32 |
| 1990 | 2 | 16 | 19 | 0 | 6 | 43 |
| 1991 | 3 | 18 | 26 | 0 | 8 | 55 |
| 1992 | 0 | 9 | 17 | 0 | 6 | 32 |
| 1993 | 11 | 9 | 47 | 0 | 9 | 76 |
| 1994 | 10 | 30 | 49 | 0 | 12 | 101 |
| 1995 | 7 | 17 | 50 | 0 | 12 | 86 |
| 1996 | 12 | 30 | 42 | 0 | 8 | 92 |
| 1997 | 5 | 26 | 69 | 0 | 10 | 110 |
| 1998 | 2 | 32 | 70 | 0 | 10 | 114 |
| 1999 | 1 | 17 | 67 | 0 | 12 | 97 |
| 2000 | 4 | 14 | 56 | 0 | 15 | 89 |
| 2001 | 3 | 9 | 61 | 0 | 12 | 85 |
| 2002 | 2 | 4 | 107 | 0 | 8 | 121 |
| 2003 | 7 | 6 | 101 | 0 | 8 | 122 |
| 2004 | 1 | 13 | 86 | 0 | 13 | 113 |
| 2005 | 11 | 8 | 139 | 0 | 14 | 172 |
| 2006 | 12 | 6 | 147 | 0 | 12 | 177 |
| 2007 | 5 | 7 | 95 | 0 | 17 | 124 |
| 2008 | 3 | 6 | 154 | 1 | 7 | 171 |
| 2009 | 5 | 3 | 229 | 0 | 18 | 255 |
| 2010 | 3 | 4 | 304 | 0 | 16 | 327 |
| 2011 | 4 | 8 | 355 | 0 | 24 | 391 |
| 2012 | 7 | 6 | 437 | 0 | 36 | 486 |
| 2013 | 4 | 6 | 477 | 0 | 23 | 510 |
| 2014 | 8 | 9 | 377 | 0 | 37 | 431 |
| 2015 | 9 | 5 | 498 | 0 | 34 | 546 |
| 2016 | 11 | 5 | 628 | 2 | 32 | 678 |
| 2017 | 15 | 14 | 894 | 0 | 47 | 970 |
| 2018 | 18 | 7 | 911 | 0 | 44 | 980 |
| 2019 | 19 | 15 | 1022 | 0 | 42 | 1098 |
| 2020 | 12 | 14 | 1095 | 0 | 63 | 1184 |
| 2021 | 6 | 8 | 1118 | 2 | 50 | 1184 |
| 2022 | 8 | 10 | 1395 | 0 | 69 | 1482 |
| 2023 | 39 | 23 | 1145 | 0 | 57 | 1264 |
| 2024 | 37 | 26 | 1160 | 0 | 93 | 1316 |
| 2025 | 0 | 0 | 11 | 0 | 1 | 12 |
| Total | 319 | 481 | 13598 | 5 | 961 | 15364 |