*Excludes Observations that spanned multiple years

	B	b	t	W	w
Pre 1970	0	0	0	0	0	0
1970	0	0	0	0	0	0
1971	0	0	0	0	0	0
1972	0	0	0	0	0	0
1973	0	0	0	0	0	0
1974	0	0	0	0	0	0
1975	0	0	0	0	0	0
1976	0	0	0	0	0	0
1977	0	0	1	0	0	1
1978	0	0	0	0	0	0
1979	0	0	0	0	0	0
1980	0	0	0	0	0	0
1981	0	0	1	0	0	1
1982	0	0	0	0	0	0
1983	0	0	1	0	0	1
1984	0	0	0	0	0	0
1985	0	0	0	0	0	0
1986	0	0	0	0	0	0
1987	0	0	0	0	0	0
1988	0	0	0	0	0	0
1989	0	0	1	0	0	1
1990	0	0	1	0	0	1
1991	0	0	0	0	0	0
1992	0	0	0	0	0	0
1993	0	0	2	0	0	2
1994	0	0	2	0	0	2
1995	0	0	0	0	0	0
1996	0	0	1	0	0	1
1997	0	0	0	0	0	0
1998	0	0	2	0	0	2
1999	0	0	0	0	0	0
2000	0	0	1	0	0	1
2001	0	0	2	0	0	2
2002	0	0	1	0	0	1
2003	0	0	0	0	0	0
2004	0	0	3	0	0	3
2005	0	0	4	0	0	4
2006	0	0	1	0	0	1
2007	0	0	3	0	0	3
2008	0	0	2	0	0	2
2009	0	0	1	0	0	1
2010	0	0	1	0	0	1
2011	0	0	1	0	0	1
2012	0	0	1	0	0	1
2013	0	0	2	0	0	2
2014	0	0	1	0	0	1
2015	0	0	2	0	0	2
2016	0	0	4	0	0	4
2017	0	0	2	0	0	2
2018	0	0	2	0	0	2
2019	0	0	3	0	0	3
2020	0	0	3	0	0	3
2021	0	0	4	0	0	4
2022	0	0	3	0	0	3
2023	0	0	0	0	0	0
2024	0	0	0	0	0	0
Total	0	0	59	0	0	59