

*Excludes Observations that spanned multiple years
B![]()  |     b![]()  |     t![]()  |     W![]()  |     w![]()  |     ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 1 | 7 | 0 | 0 | 8 | 
| 1970 | 0 | 0 | 2 | 0 | 0 | 2 | 
| 1971 | 0 | 1 | 0 | 0 | 0 | 1 | 
| 1972 | 0 | 0 | 0 | 0 | 1 | 1 | 
| 1973 | 0 | 0 | 1 | 0 | 0 | 1 | 
| 1974 | 2 | 1 | 3 | 0 | 0 | 6 | 
| 1975 | 0 | 1 | 0 | 0 | 0 | 1 | 
| 1976 | 0 | 3 | 1 | 0 | 0 | 4 | 
| 1977 | 0 | 0 | 1 | 0 | 0 | 1 | 
| 1978 | 0 | 1 | 2 | 0 | 0 | 3 | 
| 1979 | 0 | 2 | 0 | 0 | 0 | 2 | 
| 1980 | 0 | 0 | 0 | 0 | 0 | 0 | 
| 1981 | 0 | 1 | 0 | 0 | 0 | 1 | 
| 1982 | 0 | 0 | 3 | 0 | 0 | 3 | 
| 1983 | 0 | 2 | 1 | 0 | 1 | 4 | 
| 1984 | 0 | 2 | 0 | 0 | 1 | 3 | 
| 1985 | 0 | 2 | 2 | 0 | 0 | 4 | 
| 1986 | 0 | 0 | 9 | 0 | 0 | 9 | 
| 1987 | 0 | 4 | 6 | 0 | 0 | 10 | 
| 1988 | 0 | 4 | 9 | 0 | 0 | 13 | 
| 1989 | 3 | 6 | 19 | 0 | 0 | 28 | 
| 1990 | 4 | 16 | 13 | 0 | 0 | 33 | 
| 1991 | 4 | 6 | 15 | 0 | 0 | 25 | 
| 1992 | 10 | 12 | 87 | 0 | 0 | 109 | 
| 1993 | 8 | 30 | 110 | 0 | 0 | 148 | 
| 1994 | 8 | 72 | 196 | 0 | 0 | 276 | 
| 1995 | 8 | 35 | 173 | 0 | 2 | 218 | 
| 1996 | 2 | 34 | 128 | 0 | 0 | 164 | 
| 1997 | 10 | 48 | 43 | 0 | 0 | 101 | 
| 1998 | 5 | 25 | 120 | 0 | 0 | 150 | 
| 1999 | 2 | 21 | 28 | 0 | 0 | 51 | 
| 2000 | 7 | 47 | 160 | 0 | 0 | 214 | 
| 2001 | 4 | 17 | 92 | 0 | 1 | 114 | 
| 2002 | 3 | 28 | 147 | 0 | 0 | 178 | 
| 2003 | 19 | 36 | 143 | 0 | 0 | 198 | 
| 2004 | 3 | 45 | 273 | 0 | 0 | 321 | 
| 2005 | 5 | 37 | 119 | 0 | 0 | 161 | 
| 2006 | 4 | 38 | 96 | 0 | 0 | 138 | 
| 2007 | 5 | 40 | 137 | 0 | 0 | 182 | 
| 2008 | 3 | 90 | 152 | 0 | 0 | 245 | 
| 2009 | 2 | 21 | 110 | 0 | 0 | 133 | 
| 2010 | 10 | 102 | 169 | 0 | 2 | 283 | 
| 2011 | 2 | 76 | 122 | 0 | 0 | 200 | 
| 2012 | 11 | 168 | 88 | 0 | 0 | 267 | 
| 2013 | 19 | 272 | 121 | 0 | 0 | 412 | 
| 2014 | 19 | 287 | 161 | 0 | 0 | 467 | 
| 2015 | 19 | 414 | 225 | 0 | 0 | 658 | 
| 2016 | 18 | 488 | 297 | 0 | 0 | 803 | 
| 2017 | 25 | 405 | 217 | 0 | 0 | 647 | 
| 2018 | 28 | 382 | 219 | 0 | 0 | 629 | 
| 2019 | 29 | 378 | 265 | 0 | 0 | 672 | 
| 2020 | 12 | 440 | 355 | 0 | 0 | 807 | 
| 2021 | 19 | 491 | 323 | 0 | 0 | 833 | 
| 2022 | 17 | 499 | 424 | 0 | 0 | 940 | 
| 2023 | 38 | 762 | 276 | 0 | 0 | 1076 | 
| 2024 | 55 | 833 | 309 | 0 | 0 | 1197 | 
| 2025 | 0 | 1 | 24 | 0 | 0 | 25 | 
| Total | 442 | 6727 | 6003 | 0 | 8 | 13180 |