*Excludes Observations that spanned multiple years
| B | b | t | W | w | ||
|---|---|---|---|---|---|---|
| Pre 1970 | 0 | 4 | 13 | 0 | 0 | 17 |
| 1970 | 0 | 0 | 9 | 0 | 0 | 9 |
| 1971 | 0 | 1 | 1 | 0 | 0 | 2 |
| 1972 | 0 | 0 | 1 | 0 | 0 | 1 |
| 1973 | 0 | 1 | 2 | 0 | 0 | 3 |
| 1974 | 0 | 1 | 3 | 0 | 0 | 4 |
| 1975 | 0 | 2 | 3 | 0 | 0 | 5 |
| 1976 | 0 | 3 | 3 | 0 | 0 | 6 |
| 1977 | 1 | 1 | 4 | 0 | 0 | 6 |
| 1978 | 0 | 0 | 3 | 0 | 0 | 3 |
| 1979 | 0 | 4 | 8 | 0 | 0 | 12 |
| 1980 | 0 | 1 | 5 | 0 | 0 | 6 |
| 1981 | 1 | 1 | 5 | 0 | 0 | 7 |
| 1982 | 0 | 2 | 14 | 0 | 0 | 16 |
| 1983 | 0 | 0 | 2 | 0 | 1 | 3 |
| 1984 | 0 | 1 | 3 | 0 | 0 | 4 |
| 1985 | 0 | 3 | 5 | 0 | 0 | 8 |
| 1986 | 0 | 6 | 13 | 0 | 0 | 19 |
| 1987 | 0 | 4 | 14 | 0 | 3 | 21 |
| 1988 | 0 | 5 | 8 | 0 | 0 | 13 |
| 1989 | 0 | 3 | 12 | 0 | 1 | 16 |
| 1990 | 0 | 10 | 11 | 0 | 2 | 23 |
| 1991 | 0 | 25 | 34 | 0 | 0 | 59 |
| 1992 | 1 | 161 | 21 | 0 | 1 | 184 |
| 1993 | 1 | 617 | 31 | 0 | 3 | 652 |
| 1994 | 3 | 2214 | 40 | 0 | 0 | 2257 |
| 1995 | 0 | 2079 | 41 | 0 | 0 | 2120 |
| 1996 | 0 | 1957 | 33 | 0 | 0 | 1990 |
| 1997 | 0 | 620 | 26 | 0 | 2 | 648 |
| 1998 | 1 | 1216 | 46 | 0 | 1 | 1264 |
| 1999 | 0 | 48 | 23 | 0 | 1 | 72 |
| 2000 | 4 | 1452 | 57 | 0 | 1 | 1514 |
| 2001 | 0 | 910 | 62 | 0 | 1 | 973 |
| 2002 | 0 | 1615 | 45 | 0 | 0 | 1660 |
| 2003 | 1 | 1106 | 47 | 0 | 0 | 1154 |
| 2004 | 1 | 1938 | 44 | 0 | 3 | 1986 |
| 2005 | 2 | 216 | 64 | 0 | 1 | 283 |
| 2006 | 1 | 1037 | 74 | 0 | 1 | 1113 |
| 2007 | 1 | 1492 | 128 | 0 | 1 | 1622 |
| 2008 | 0 | 847 | 90 | 0 | 0 | 937 |
| 2009 | 0 | 214 | 127 | 0 | 3 | 344 |
| 2010 | 3 | 415 | 190 | 0 | 3 | 611 |
| 2011 | 0 | 628 | 220 | 0 | 4 | 852 |
| 2012 | 1 | 977 | 289 | 0 | 2 | 1269 |
| 2013 | 12 | 1238 | 343 | 0 | 1 | 1594 |
| 2014 | 2 | 1468 | 331 | 0 | 0 | 1801 |
| 2015 | 5 | 1317 | 416 | 0 | 1 | 1739 |
| 2016 | 3 | 1675 | 491 | 0 | 0 | 2169 |
| 2017 | 5 | 1718 | 560 | 0 | 1 | 2284 |
| 2018 | 6 | 1854 | 630 | 0 | 1 | 2491 |
| 2019 | 6 | 1562 | 668 | 0 | 3 | 2239 |
| 2020 | 2 | 1916 | 891 | 0 | 4 | 2813 |
| 2021 | 3 | 1653 | 760 | 0 | 2 | 2418 |
| 2022 | 4 | 1966 | 342 | 0 | 1 | 2313 |
| 2023 | 0 | 6 | 23 | 0 | 0 | 29 |
| 2024 | 0 | 8 | 31 | 0 | 0 | 39 |
| Total | 70 | 38218 | 7360 | 0 | 49 | 45697 |