

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 0 | 18 | 0 | 81 | 99 |
| 1970 | 0 | 0 | 3 | 0 | 3 | 6 |
| 1971 | 0 | 0 | 1 | 0 | 6 | 7 |
| 1972 | 0 | 0 | 1 | 0 | 5 | 6 |
| 1973 | 0 | 0 | 2 | 0 | 6 | 8 |
| 1974 | 0 | 0 | 9 | 0 | 5 | 14 |
| 1975 | 0 | 0 | 4 | 0 | 8 | 12 |
| 1976 | 0 | 0 | 6 | 0 | 8 | 14 |
| 1977 | 0 | 0 | 5 | 0 | 10 | 15 |
| 1978 | 0 | 0 | 3 | 0 | 9 | 12 |
| 1979 | 0 | 0 | 4 | 0 | 13 | 17 |
| 1980 | 0 | 0 | 3 | 0 | 11 | 14 |
| 1981 | 0 | 0 | 4 | 0 | 15 | 19 |
| 1982 | 0 | 0 | 12 | 0 | 22 | 34 |
| 1983 | 0 | 0 | 5 | 0 | 12 | 17 |
| 1984 | 0 | 0 | 10 | 0 | 18 | 28 |
| 1985 | 0 | 1 | 6 | 0 | 14 | 21 |
| 1986 | 0 | 1 | 20 | 0 | 18 | 39 |
| 1987 | 0 | 4 | 24 | 1 | 23 | 52 |
| 1988 | 0 | 0 | 31 | 0 | 21 | 52 |
| 1989 | 0 | 4 | 36 | 0 | 19 | 59 |
| 1990 | 1 | 22 | 25 | 0 | 17 | 65 |
| 1991 | 6 | 19 | 76 | 1 | 22 | 124 |
| 1992 | 4 | 57 | 41 | 1 | 17 | 120 |
| 1993 | 2 | 141 | 137 | 0 | 25 | 305 |
| 1994 | 4 | 557 | 247 | 0 | 23 | 831 |
| 1995 | 3 | 572 | 217 | 2 | 26 | 820 |
| 1996 | 4 | 537 | 232 | 0 | 21 | 794 |
| 1997 | 2 | 227 | 244 | 0 | 33 | 506 |
| 1998 | 4 | 384 | 97 | 0 | 29 | 514 |
| 1999 | 3 | 78 | 86 | 0 | 26 | 193 |
| 2000 | 0 | 480 | 112 | 0 | 38 | 630 |
| 2001 | 4 | 329 | 131 | 0 | 40 | 504 |
| 2002 | 3 | 390 | 122 | 0 | 26 | 541 |
| 2003 | 2 | 395 | 134 | 2 | 25 | 558 |
| 2004 | 2 | 546 | 111 | 0 | 32 | 691 |
| 2005 | 3 | 160 | 198 | 0 | 46 | 407 |
| 2006 | 2 | 411 | 221 | 0 | 35 | 669 |
| 2007 | 3 | 409 | 224 | 7 | 50 | 693 |
| 2008 | 1 | 225 | 334 | 21 | 42 | 623 |
| 2009 | 4 | 79 | 376 | 0 | 69 | 528 |
| 2010 | 1 | 125 | 551 | 0 | 84 | 761 |
| 2011 | 0 | 5 | 832 | 0 | 117 | 954 |
| 2012 | 5 | 16 | 1100 | 2 | 243 | 1366 |
| 2013 | 6 | 19 | 1641 | 0 | 275 | 1941 |
| 2014 | 6 | 21 | 1728 | 2 | 363 | 2120 |
| 2015 | 21 | 8 | 2348 | 1 | 602 | 2980 |
| 2016 | 18 | 7 | 2733 | 2 | 721 | 3481 |
| 2017 | 28 | 14 | 3421 | 1 | 863 | 4327 |
| 2018 | 22 | 16 | 3769 | 4 | 976 | 4787 |
| 2019 | 32 | 14 | 4144 | 2 | 873 | 5065 |
| 2020 | 16 | 16 | 4994 | 3 | 1122 | 6151 |
| 2021 | 17 | 7 | 5049 | 2 | 1160 | 6235 |
| 2022 | 23 | 6 | 5812 | 4 | 1133 | 6978 |
| 2023 | 43 | 15 | 5295 | 0 | 1279 | 6632 |
| 2024 | 45 | 19 | 5886 | 0 | 1402 | 7352 |
| 2025 | 0 | 7 | 28 | 0 | 8 | 43 |
| Total | 340 | 6343 | 52903 | 58 | 12190 | 71834 |