

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 2 | 9 | 0 | 59 | 70 |
| 1970 | 0 | 0 | 1 | 0 | 1 | 2 |
| 1971 | 0 | 0 | 1 | 0 | 4 | 5 |
| 1972 | 0 | 0 | 0 | 0 | 4 | 4 |
| 1973 | 0 | 0 | 2 | 0 | 7 | 9 |
| 1974 | 0 | 1 | 2 | 0 | 6 | 9 |
| 1975 | 0 | 0 | 2 | 0 | 7 | 9 |
| 1976 | 0 | 0 | 2 | 0 | 9 | 11 |
| 1977 | 0 | 0 | 0 | 0 | 9 | 9 |
| 1978 | 0 | 0 | 0 | 0 | 6 | 6 |
| 1979 | 0 | 0 | 2 | 0 | 11 | 13 |
| 1980 | 0 | 0 | 0 | 0 | 10 | 10 |
| 1981 | 0 | 0 | 0 | 0 | 16 | 16 |
| 1982 | 0 | 0 | 5 | 0 | 8 | 13 |
| 1983 | 0 | 0 | 1 | 0 | 7 | 8 |
| 1984 | 0 | 1 | 3 | 0 | 10 | 14 |
| 1985 | 0 | 1 | 0 | 0 | 11 | 12 |
| 1986 | 0 | 1 | 5 | 0 | 11 | 17 |
| 1987 | 0 | 0 | 5 | 0 | 10 | 15 |
| 1988 | 0 | 1 | 4 | 0 | 12 | 17 |
| 1989 | 0 | 2 | 0 | 0 | 12 | 14 |
| 1990 | 0 | 1 | 1 | 0 | 14 | 16 |
| 1991 | 0 | 5 | 14 | 0 | 7 | 26 |
| 1992 | 1 | 3 | 7 | 0 | 9 | 20 |
| 1993 | 0 | 17 | 4 | 0 | 18 | 39 |
| 1994 | 0 | 39 | 9 | 0 | 17 | 65 |
| 1995 | 1 | 74 | 16 | 2 | 9 | 102 |
| 1996 | 1 | 63 | 5 | 0 | 10 | 79 |
| 1997 | 1 | 31 | 6 | 0 | 14 | 52 |
| 1998 | 0 | 100 | 6 | 0 | 13 | 119 |
| 1999 | 0 | 5 | 5 | 0 | 17 | 27 |
| 2000 | 0 | 110 | 18 | 0 | 18 | 146 |
| 2001 | 1 | 54 | 18 | 0 | 21 | 94 |
| 2002 | 0 | 128 | 22 | 0 | 15 | 165 |
| 2003 | 0 | 97 | 13 | 0 | 18 | 128 |
| 2004 | 0 | 129 | 18 | 0 | 20 | 167 |
| 2005 | 0 | 23 | 14 | 1 | 20 | 58 |
| 2006 | 0 | 52 | 15 | 1 | 22 | 90 |
| 2007 | 3 | 183 | 30 | 0 | 17 | 233 |
| 2008 | 0 | 31 | 20 | 1 | 13 | 65 |
| 2009 | 0 | 10 | 24 | 0 | 22 | 56 |
| 2010 | 0 | 24 | 50 | 0 | 20 | 94 |
| 2011 | 0 | 19 | 48 | 0 | 25 | 92 |
| 2012 | 0 | 62 | 95 | 0 | 43 | 200 |
| 2013 | 1 | 67 | 117 | 0 | 42 | 227 |
| 2014 | 2 | 79 | 116 | 0 | 51 | 248 |
| 2015 | 0 | 103 | 192 | 0 | 81 | 376 |
| 2016 | 0 | 108 | 207 | 1 | 77 | 393 |
| 2017 | 2 | 143 | 231 | 0 | 64 | 440 |
| 2018 | 1 | 140 | 230 | 1 | 99 | 471 |
| 2019 | 5 | 116 | 312 | 1 | 79 | 513 |
| 2020 | 5 | 137 | 325 | 0 | 127 | 594 |
| 2021 | 1 | 105 | 236 | 1 | 117 | 460 |
| 2022 | 1 | 128 | 257 | 0 | 73 | 459 |
| 2023 | 2 | 177 | 338 | 0 | 90 | 607 |
| 2024 | 1 | 141 | 345 | 0 | 129 | 616 |
| 2025 | 0 | 5 | 1 | 0 | 0 | 6 |
| 2026 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 29 | 2718 | 3409 | 9 | 1661 | 7826 |