

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 1 | 1 | 4 | 0 | 62 | 68 |
| 1970 | 0 | 0 | 1 | 0 | 3 | 4 |
| 1971 | 0 | 0 | 0 | 0 | 7 | 7 |
| 1972 | 0 | 0 | 0 | 0 | 3 | 3 |
| 1973 | 0 | 0 | 0 | 0 | 5 | 5 |
| 1974 | 0 | 0 | 1 | 0 | 6 | 7 |
| 1975 | 0 | 0 | 0 | 0 | 7 | 7 |
| 1976 | 0 | 0 | 0 | 0 | 6 | 6 |
| 1977 | 0 | 0 | 0 | 0 | 10 | 10 |
| 1978 | 0 | 0 | 0 | 0 | 6 | 6 |
| 1979 | 0 | 0 | 0 | 0 | 8 | 8 |
| 1980 | 0 | 0 | 2 | 0 | 8 | 10 |
| 1981 | 0 | 0 | 0 | 0 | 13 | 13 |
| 1982 | 0 | 0 | 0 | 0 | 11 | 11 |
| 1983 | 0 | 0 | 0 | 0 | 6 | 6 |
| 1984 | 0 | 0 | 1 | 0 | 4 | 5 |
| 1985 | 0 | 0 | 2 | 0 | 3 | 5 |
| 1986 | 0 | 0 | 1 | 0 | 11 | 12 |
| 1987 | 0 | 0 | 5 | 0 | 9 | 14 |
| 1988 | 0 | 0 | 2 | 0 | 9 | 11 |
| 1989 | 0 | 2 | 21 | 0 | 12 | 35 |
| 1990 | 0 | 11 | 1 | 0 | 11 | 23 |
| 1991 | 0 | 0 | 6 | 0 | 6 | 12 |
| 1992 | 1 | 1 | 4 | 0 | 9 | 15 |
| 1993 | 0 | 156 | 1 | 0 | 13 | 170 |
| 1994 | 0 | 287 | 8 | 0 | 10 | 305 |
| 1995 | 0 | 243 | 6 | 0 | 15 | 264 |
| 1996 | 1 | 352 | 4 | 0 | 11 | 368 |
| 1997 | 0 | 527 | 7 | 0 | 14 | 548 |
| 1998 | 2 | 252 | 12 | 0 | 10 | 276 |
| 1999 | 0 | 205 | 4 | 0 | 11 | 220 |
| 2000 | 0 | 239 | 4 | 0 | 15 | 258 |
| 2001 | 0 | 197 | 5 | 0 | 11 | 213 |
| 2002 | 0 | 208 | 9 | 0 | 6 | 223 |
| 2003 | 0 | 242 | 9 | 0 | 8 | 259 |
| 2004 | 0 | 319 | 4 | 0 | 10 | 333 |
| 2005 | 0 | 262 | 9 | 0 | 12 | 283 |
| 2006 | 1 | 315 | 24 | 0 | 10 | 350 |
| 2007 | 0 | 265 | 13 | 1 | 13 | 292 |
| 2008 | 0 | 26 | 25 | 0 | 6 | 57 |
| 2009 | 1 | 3 | 35 | 0 | 8 | 47 |
| 2010 | 0 | 8 | 60 | 0 | 12 | 80 |
| 2011 | 0 | 2 | 44 | 0 | 14 | 60 |
| 2012 | 0 | 30 | 67 | 0 | 28 | 125 |
| 2013 | 0 | 22 | 86 | 0 | 17 | 125 |
| 2014 | 2 | 46 | 118 | 1 | 31 | 198 |
| 2015 | 0 | 55 | 167 | 0 | 43 | 265 |
| 2016 | 3 | 79 | 214 | 1 | 66 | 363 |
| 2017 | 8 | 115 | 242 | 0 | 68 | 433 |
| 2018 | 5 | 149 | 291 | 0 | 55 | 500 |
| 2019 | 9 | 131 | 313 | 1 | 73 | 527 |
| 2020 | 2 | 164 | 429 | 0 | 58 | 653 |
| 2021 | 5 | 107 | 279 | 0 | 60 | 451 |
| 2022 | 2 | 134 | 280 | 0 | 70 | 486 |
| 2023 | 2 | 103 | 198 | 0 | 60 | 363 |
| 2024 | 7 | 227 | 262 | 0 | 60 | 556 |
| 2025 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 52 | 5485 | 3280 | 4 | 1133 | 9954 |