

*Excludes Observations that spanned multiple years
B![]()  |     b![]()  |     t![]()  |     W![]()  |     w![]()  |     ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 8 | 17 | 0 | 0 | 25 | 
| 1970 | 0 | 0 | 2 | 0 | 0 | 2 | 
| 1971 | 0 | 9 | 0 | 0 | 0 | 9 | 
| 1972 | 0 | 0 | 0 | 0 | 0 | 0 | 
| 1973 | 0 | 1 | 2 | 0 | 0 | 3 | 
| 1974 | 0 | 1 | 0 | 0 | 0 | 1 | 
| 1975 | 0 | 3 | 2 | 0 | 0 | 5 | 
| 1976 | 0 | 0 | 4 | 0 | 0 | 4 | 
| 1977 | 0 | 1 | 4 | 0 | 0 | 5 | 
| 1978 | 0 | 0 | 1 | 0 | 0 | 1 | 
| 1979 | 0 | 1 | 1 | 0 | 0 | 2 | 
| 1980 | 0 | 0 | 1 | 0 | 0 | 1 | 
| 1981 | 0 | 2 | 4 | 0 | 0 | 6 | 
| 1982 | 0 | 2 | 4 | 0 | 0 | 6 | 
| 1983 | 0 | 1 | 3 | 0 | 0 | 4 | 
| 1984 | 0 | 0 | 1 | 0 | 0 | 1 | 
| 1985 | 0 | 2 | 2 | 0 | 0 | 4 | 
| 1986 | 0 | 4 | 3 | 0 | 0 | 7 | 
| 1987 | 0 | 6 | 11 | 0 | 0 | 17 | 
| 1988 | 0 | 3 | 6 | 0 | 0 | 9 | 
| 1989 | 0 | 8 | 11 | 0 | 0 | 19 | 
| 1990 | 1 | 36 | 3 | 0 | 0 | 40 | 
| 1991 | 1 | 25 | 13 | 0 | 0 | 39 | 
| 1992 | 2 | 33 | 11 | 0 | 0 | 46 | 
| 1993 | 0 | 120 | 24 | 0 | 0 | 144 | 
| 1994 | 2 | 149 | 27 | 0 | 0 | 178 | 
| 1995 | 1 | 150 | 24 | 0 | 0 | 175 | 
| 1996 | 3 | 162 | 16 | 0 | 0 | 181 | 
| 1997 | 0 | 238 | 21 | 0 | 0 | 259 | 
| 1998 | 2 | 195 | 13 | 0 | 0 | 210 | 
| 1999 | 0 | 118 | 17 | 0 | 0 | 135 | 
| 2000 | 0 | 231 | 47 | 0 | 0 | 278 | 
| 2001 | 3 | 356 | 26 | 0 | 1 | 386 | 
| 2002 | 0 | 170 | 42 | 0 | 0 | 212 | 
| 2003 | 1 | 406 | 37 | 0 | 0 | 444 | 
| 2004 | 0 | 392 | 23 | 0 | 0 | 415 | 
| 2005 | 2 | 261 | 80 | 0 | 1 | 344 | 
| 2006 | 1 | 203 | 49 | 0 | 0 | 253 | 
| 2007 | 0 | 153 | 70 | 0 | 0 | 223 | 
| 2008 | 0 | 163 | 72 | 0 | 0 | 235 | 
| 2009 | 1 | 157 | 82 | 0 | 0 | 240 | 
| 2010 | 1 | 120 | 154 | 0 | 0 | 275 | 
| 2011 | 1 | 80 | 170 | 0 | 0 | 251 | 
| 2012 | 1 | 304 | 142 | 0 | 0 | 447 | 
| 2013 | 3 | 285 | 127 | 0 | 0 | 415 | 
| 2014 | 4 | 331 | 225 | 0 | 0 | 560 | 
| 2015 | 3 | 453 | 180 | 0 | 0 | 636 | 
| 2016 | 4 | 497 | 228 | 0 | 0 | 729 | 
| 2017 | 4 | 651 | 233 | 0 | 0 | 888 | 
| 2018 | 3 | 588 | 282 | 0 | 0 | 873 | 
| 2019 | 7 | 713 | 318 | 0 | 0 | 1038 | 
| 2020 | 0 | 684 | 464 | 0 | 3 | 1151 | 
| 2021 | 1 | 819 | 428 | 0 | 0 | 1248 | 
| 2022 | 5 | 842 | 530 | 0 | 0 | 1377 | 
| 2023 | 12 | 1167 | 293 | 0 | 0 | 1472 | 
| 2024 | 9 | 1248 | 292 | 0 | 0 | 1549 | 
| 2025 | 1 | 2 | 17 | 0 | 0 | 20 | 
| Total | 79 | 12554 | 4859 | 0 | 5 | 17497 |