

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 2 | 6 | 0 | 117 | 125 |
| 1970 | 0 | 0 | 4 | 0 | 4 | 8 |
| 1971 | 0 | 1 | 1 | 0 | 10 | 12 |
| 1972 | 0 | 0 | 1 | 0 | 7 | 8 |
| 1973 | 0 | 1 | 1 | 0 | 7 | 9 |
| 1974 | 0 | 1 | 6 | 0 | 7 | 14 |
| 1975 | 0 | 2 | 3 | 0 | 9 | 14 |
| 1976 | 0 | 3 | 3 | 0 | 13 | 19 |
| 1977 | 0 | 1 | 10 | 0 | 12 | 23 |
| 1978 | 0 | 2 | 1 | 0 | 12 | 15 |
| 1979 | 0 | 1 | 2 | 0 | 16 | 19 |
| 1980 | 0 | 0 | 2 | 0 | 17 | 19 |
| 1981 | 0 | 0 | 0 | 0 | 18 | 18 |
| 1982 | 0 | 2 | 3 | 0 | 20 | 25 |
| 1983 | 0 | 1 | 3 | 0 | 21 | 25 |
| 1984 | 0 | 1 | 0 | 0 | 21 | 22 |
| 1985 | 0 | 0 | 2 | 0 | 20 | 22 |
| 1986 | 1 | 5 | 5 | 0 | 21 | 32 |
| 1987 | 0 | 4 | 10 | 0 | 20 | 34 |
| 1988 | 0 | 8 | 5 | 0 | 21 | 34 |
| 1989 | 2 | 8 | 12 | 0 | 19 | 41 |
| 1990 | 3 | 34 | 11 | 2 | 17 | 67 |
| 1991 | 12 | 11 | 13 | 2 | 14 | 52 |
| 1992 | 5 | 11 | 16 | 1 | 21 | 54 |
| 1993 | 2 | 24 | 22 | 1 | 21 | 70 |
| 1994 | 0 | 81 | 43 | 0 | 25 | 149 |
| 1995 | 3 | 20 | 13 | 1 | 23 | 60 |
| 1996 | 4 | 37 | 24 | 1 | 19 | 85 |
| 1997 | 1 | 98 | 23 | 1 | 28 | 151 |
| 1998 | 6 | 110 | 42 | 0 | 22 | 180 |
| 1999 | 2 | 58 | 30 | 0 | 19 | 109 |
| 2000 | 1 | 76 | 31 | 0 | 29 | 137 |
| 2001 | 3 | 80 | 29 | 0 | 30 | 142 |
| 2002 | 0 | 69 | 57 | 0 | 17 | 143 |
| 2003 | 2 | 82 | 55 | 0 | 18 | 157 |
| 2004 | 1 | 96 | 30 | 0 | 26 | 153 |
| 2005 | 0 | 80 | 53 | 0 | 30 | 163 |
| 2006 | 4 | 79 | 99 | 0 | 31 | 213 |
| 2007 | 2 | 85 | 84 | 4 | 33 | 208 |
| 2008 | 1 | 45 | 138 | 8 | 31 | 223 |
| 2009 | 1 | 22 | 146 | 0 | 38 | 207 |
| 2010 | 3 | 29 | 228 | 0 | 54 | 314 |
| 2011 | 0 | 18 | 331 | 1 | 65 | 415 |
| 2012 | 3 | 184 | 305 | 1 | 128 | 621 |
| 2013 | 7 | 270 | 403 | 3 | 126 | 809 |
| 2014 | 10 | 331 | 372 | 0 | 171 | 884 |
| 2015 | 14 | 468 | 551 | 0 | 300 | 1333 |
| 2016 | 13 | 531 | 635 | 3 | 405 | 1587 |
| 2017 | 13 | 622 | 778 | 3 | 375 | 1791 |
| 2018 | 15 | 698 | 845 | 3 | 377 | 1938 |
| 2019 | 16 | 833 | 1032 | 9 | 328 | 2218 |
| 2020 | 3 | 772 | 1390 | 1 | 393 | 2559 |
| 2021 | 9 | 967 | 1423 | 3 | 514 | 2916 |
| 2022 | 13 | 1089 | 1686 | 2 | 460 | 3250 |
| 2023 | 33 | 1285 | 1011 | 0 | 423 | 2752 |
| 2024 | 22 | 1370 | 1189 | 0 | 490 | 3071 |
| 2025 | 1 | 9 | 25 | 0 | 2 | 37 |
| Total | 231 | 10717 | 13243 | 50 | 5515 | 29756 |