

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 1 | 13 | 0 | 85 | 99 |
| 1970 | 0 | 0 | 0 | 0 | 3 | 3 |
| 1971 | 0 | 0 | 0 | 0 | 10 | 10 |
| 1972 | 0 | 0 | 1 | 0 | 5 | 6 |
| 1973 | 0 | 0 | 1 | 0 | 5 | 6 |
| 1974 | 0 | 2 | 4 | 0 | 4 | 10 |
| 1975 | 0 | 1 | 3 | 0 | 7 | 11 |
| 1976 | 0 | 2 | 5 | 0 | 8 | 15 |
| 1977 | 0 | 1 | 5 | 0 | 11 | 17 |
| 1978 | 0 | 0 | 3 | 0 | 8 | 11 |
| 1979 | 0 | 2 | 5 | 0 | 10 | 17 |
| 1980 | 0 | 1 | 3 | 0 | 12 | 16 |
| 1981 | 0 | 0 | 5 | 0 | 16 | 21 |
| 1982 | 0 | 2 | 8 | 0 | 17 | 27 |
| 1983 | 0 | 2 | 4 | 0 | 11 | 17 |
| 1984 | 0 | 1 | 4 | 0 | 17 | 22 |
| 1985 | 1 | 1 | 2 | 0 | 13 | 17 |
| 1986 | 0 | 2 | 16 | 0 | 17 | 35 |
| 1987 | 0 | 3 | 19 | 0 | 18 | 40 |
| 1988 | 0 | 11 | 10 | 0 | 21 | 42 |
| 1989 | 0 | 8 | 10 | 0 | 15 | 33 |
| 1990 | 1 | 19 | 16 | 1 | 16 | 53 |
| 1991 | 3 | 15 | 42 | 1 | 14 | 75 |
| 1992 | 1 | 10 | 30 | 0 | 12 | 53 |
| 1993 | 0 | 16 | 45 | 0 | 17 | 78 |
| 1994 | 0 | 26 | 59 | 1 | 28 | 114 |
| 1995 | 2 | 18 | 37 | 0 | 21 | 78 |
| 1996 | 1 | 10 | 36 | 0 | 12 | 59 |
| 1997 | 1 | 17 | 54 | 0 | 25 | 97 |
| 1998 | 1 | 26 | 51 | 1 | 20 | 99 |
| 1999 | 0 | 10 | 40 | 0 | 25 | 75 |
| 2000 | 1 | 14 | 101 | 0 | 33 | 149 |
| 2001 | 1 | 15 | 90 | 0 | 30 | 136 |
| 2002 | 1 | 15 | 84 | 0 | 16 | 116 |
| 2003 | 1 | 35 | 106 | 0 | 22 | 164 |
| 2004 | 0 | 36 | 80 | 0 | 24 | 140 |
| 2005 | 2 | 24 | 97 | 1 | 36 | 160 |
| 2006 | 1 | 20 | 131 | 1 | 26 | 179 |
| 2007 | 1 | 26 | 128 | 3 | 27 | 185 |
| 2008 | 1 | 34 | 120 | 4 | 20 | 179 |
| 2009 | 2 | 16 | 126 | 0 | 32 | 176 |
| 2010 | 0 | 19 | 184 | 0 | 32 | 235 |
| 2011 | 0 | 16 | 189 | 0 | 39 | 244 |
| 2012 | 3 | 89 | 243 | 0 | 84 | 419 |
| 2013 | 4 | 184 | 361 | 1 | 70 | 620 |
| 2014 | 2 | 167 | 292 | 1 | 85 | 547 |
| 2015 | 1 | 259 | 434 | 1 | 103 | 798 |
| 2016 | 3 | 323 | 633 | 2 | 148 | 1109 |
| 2017 | 2 | 298 | 566 | 1 | 127 | 994 |
| 2018 | 3 | 282 | 559 | 2 | 158 | 1004 |
| 2019 | 1 | 274 | 483 | 3 | 147 | 908 |
| 2020 | 2 | 261 | 728 | 0 | 111 | 1102 |
| 2021 | 1 | 276 | 715 | 2 | 141 | 1135 |
| 2022 | 3 | 347 | 846 | 2 | 153 | 1351 |
| 2023 | 5 | 497 | 683 | 0 | 185 | 1370 |
| 2024 | 7 | 568 | 746 | 0 | 182 | 1503 |
| 2025 | 0 | 3 | 20 | 0 | 0 | 23 |
| Total | 59 | 4305 | 9276 | 28 | 2534 | 16202 |