

*Excludes Observations that spanned multiple years
B![]() | b![]() | t![]() | W![]() | w![]() | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 6 | 13 | 0 | 0 | 19 |
| 1970 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1971 | 1 | 7 | 0 | 0 | 0 | 8 |
| 1972 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1973 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1974 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1975 | 0 | 2 | 3 | 0 | 0 | 5 |
| 1976 | 0 | 3 | 0 | 0 | 0 | 3 |
| 1977 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1978 | 0 | 1 | 1 | 0 | 0 | 2 |
| 1979 | 1 | 2 | 0 | 0 | 0 | 3 |
| 1980 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1981 | 0 | 0 | 2 | 0 | 0 | 2 |
| 1982 | 1 | 1 | 6 | 0 | 0 | 8 |
| 1983 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1984 | 1 | 2 | 6 | 0 | 0 | 9 |
| 1985 | 1 | 3 | 2 | 0 | 0 | 6 |
| 1986 | 0 | 3 | 4 | 0 | 0 | 7 |
| 1987 | 1 | 6 | 14 | 0 | 0 | 21 |
| 1988 | 0 | 5 | 21 | 0 | 0 | 26 |
| 1989 | 0 | 7 | 18 | 0 | 0 | 25 |
| 1990 | 1 | 33 | 6 | 0 | 0 | 40 |
| 1991 | 5 | 18 | 7 | 0 | 0 | 30 |
| 1992 | 3 | 98 | 3 | 0 | 0 | 104 |
| 1993 | 0 | 433 | 14 | 0 | 0 | 447 |
| 1994 | 6 | 1043 | 34 | 0 | 0 | 1083 |
| 1995 | 2 | 923 | 8 | 0 | 0 | 933 |
| 1996 | 4 | 879 | 9 | 0 | 0 | 892 |
| 1997 | 3 | 431 | 15 | 0 | 0 | 449 |
| 1998 | 1 | 801 | 12 | 0 | 0 | 814 |
| 1999 | 0 | 301 | 10 | 0 | 0 | 311 |
| 2000 | 4 | 1160 | 22 | 0 | 0 | 1186 |
| 2001 | 3 | 795 | 21 | 0 | 0 | 819 |
| 2002 | 2 | 1172 | 40 | 0 | 0 | 1214 |
| 2003 | 1 | 861 | 28 | 0 | 0 | 890 |
| 2004 | 1 | 1375 | 21 | 0 | 0 | 1397 |
| 2005 | 2 | 450 | 46 | 0 | 0 | 498 |
| 2006 | 0 | 496 | 41 | 0 | 0 | 537 |
| 2007 | 4 | 583 | 78 | 0 | 0 | 665 |
| 2008 | 3 | 450 | 68 | 0 | 0 | 521 |
| 2009 | 2 | 223 | 81 | 0 | 0 | 306 |
| 2010 | 3 | 446 | 144 | 0 | 0 | 593 |
| 2011 | 0 | 175 | 151 | 0 | 0 | 326 |
| 2012 | 9 | 406 | 110 | 0 | 0 | 525 |
| 2013 | 10 | 612 | 174 | 0 | 0 | 796 |
| 2014 | 8 | 649 | 200 | 0 | 0 | 857 |
| 2015 | 13 | 742 | 211 | 0 | 0 | 966 |
| 2016 | 11 | 915 | 238 | 0 | 0 | 1164 |
| 2017 | 8 | 1100 | 292 | 0 | 0 | 1400 |
| 2018 | 16 | 1110 | 398 | 0 | 0 | 1524 |
| 2019 | 22 | 1079 | 453 | 0 | 0 | 1554 |
| 2020 | 6 | 1448 | 563 | 0 | 0 | 2017 |
| 2021 | 10 | 1415 | 461 | 0 | 0 | 1886 |
| 2022 | 4 | 1393 | 674 | 0 | 0 | 2071 |
| 2023 | 15 | 2250 | 284 | 0 | 0 | 2549 |
| 2024 | 20 | 2213 | 306 | 0 | 0 | 2539 |
| 2025 | 0 | 0 | 2 | 0 | 0 | 2 |
| Total | 208 | 28526 | 5319 | 0 | 0 | 34053 |