

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 23 | 213 | 12 | 0 | 4 | 252 |
| 1970 | 4 | 46 | 2 | 0 | 1 | 53 |
| 1971 | 3 | 46 | 1 | 0 | 1 | 51 |
| 1972 | 4 | 62 | 8 | 0 | 2 | 76 |
| 1973 | 2 | 84 | 2 | 0 | 0 | 88 |
| 1974 | 2 | 96 | 4 | 0 | 0 | 102 |
| 1975 | 4 | 118 | 9 | 0 | 2 | 133 |
| 1976 | 7 | 88 | 16 | 0 | 2 | 113 |
| 1977 | 8 | 106 | 24 | 0 | 2 | 140 |
| 1978 | 0 | 106 | 17 | 0 | 14 | 137 |
| 1979 | 7 | 117 | 13 | 0 | 2 | 139 |
| 1980 | 10 | 162 | 47 | 0 | 3 | 222 |
| 1981 | 7 | 145 | 24 | 0 | 4 | 180 |
| 1982 | 9 | 162 | 14 | 0 | 2 | 187 |
| 1983 | 11 | 182 | 26 | 0 | 1 | 220 |
| 1984 | 6 | 199 | 30 | 0 | 2 | 237 |
| 1985 | 1 | 148 | 28 | 0 | 2 | 179 |
| 1986 | 1 | 148 | 9 | 0 | 1 | 159 |
| 1987 | 1 | 181 | 9 | 0 | 3 | 194 |
| 1988 | 4 | 185 | 16 | 0 | 2 | 207 |
| 1989 | 1 | 161 | 8 | 0 | 0 | 170 |
| 1990 | 1 | 174 | 8 | 0 | 1 | 184 |
| 1991 | 3 | 104 | 10 | 0 | 3 | 120 |
| 1992 | 1 | 128 | 8 | 0 | 1 | 138 |
| 1993 | 1 | 138 | 12 | 0 | 1 | 152 |
| 1994 | 3 | 149 | 6 | 0 | 2 | 160 |
| 1995 | 2 | 110 | 11 | 0 | 1 | 124 |
| 1996 | 4 | 118 | 7 | 0 | 1 | 130 |
| 1997 | 0 | 126 | 7 | 0 | 2 | 135 |
| 1998 | 0 | 127 | 7 | 0 | 1 | 135 |
| 1999 | 1 | 229 | 11 | 0 | 1 | 242 |
| 2000 | 3 | 401 | 35 | 0 | 0 | 439 |
| 2001 | 6 | 433 | 42 | 1 | 0 | 482 |
| 2002 | 7 | 399 | 26 | 0 | 1 | 433 |
| 2003 | 7 | 463 | 69 | 0 | 3 | 542 |
| 2004 | 10 | 409 | 26 | 0 | 10 | 455 |
| 2005 | 8 | 442 | 30 | 0 | 1 | 481 |
| 2006 | 12 | 586 | 58 | 0 | 10 | 666 |
| 2007 | 5 | 473 | 36 | 0 | 3 | 517 |
| 2008 | 4 | 450 | 27 | 0 | 0 | 481 |
| 2009 | 1 | 459 | 114 | 0 | 1 | 575 |
| 2010 | 2 | 580 | 161 | 0 | 2 | 745 |
| 2011 | 1 | 422 | 120 | 0 | 1 | 544 |
| 2012 | 4 | 445 | 58 | 0 | 0 | 507 |
| 2013 | 3 | 501 | 75 | 0 | 1 | 580 |
| 2014 | 40 | 489 | 35 | 0 | 2 | 566 |
| 2015 | 20 | 493 | 150 | 0 | 2 | 665 |
| 2016 | 21 | 540 | 111 | 0 | 4 | 676 |
| 2017 | 40 | 583 | 130 | 0 | 5 | 758 |
| 2018 | 13 | 459 | 231 | 0 | 6 | 709 |
| 2019 | 2 | 543 | 71 | 0 | 0 | 616 |
| 2020 | 9 | 537 | 55 | 0 | 2 | 603 |
| 2021 | 2 | 548 | 94 | 0 | 5 | 649 |
| 2022 | 3 | 449 | 89 | 0 | 3 | 544 |
| 2023 | 3 | 442 | 111 | 0 | 2 | 558 |
| 2024 | 6 | 444 | 100 | 0 | 4 | 554 |
| 2025 | 0 | 1 | 4 | 0 | 0 | 5 |
| Total | 363 | 16149 | 2464 | 1 | 132 | 19109 |