*Excludes Observations that spanned multiple years

	B	b	t	W	w
Pre 1970	2	0	4	0	0	6
1970	0	0	1	0	0	1
1971	0	0	0	0	0	0
1972	0	0	1	0	0	1
1973	0	0	0	0	0	0
1974	0	0	0	0	0	0
1975	0	0	2	0	0	2
1976	0	0	2	0	0	2
1977	0	0	3	0	0	3
1978	0	0	2	0	0	2
1979	0	2	6	0	0	8
1980	0	5	2	0	0	7
1981	1	0	2	0	0	3
1982	0	0	2	0	0	2
1983	0	0	3	0	0	3
1984	0	0	1	0	0	1
1985	0	0	4	0	0	4
1986	0	0	5	0	0	5
1987	0	1	9	0	0	10
1988	0	1	3	0	0	4
1989	1	2	8	0	0	11
1990	8	15	7	0	0	30
1991	1	9	19	0	0	29
1992	1	3	9	0	0	13
1993	2	14	9	0	0	25
1994	1	47	14	0	0	62
1995	5	26	11	0	0	42
1996	8	34	13	0	0	55
1997	3	141	24	0	0	168
1998	1	79	20	0	0	100
1999	2	100	34	0	0	136
2000	3	71	49	0	0	123
2001	2	136	17	0	0	155
2002	0	135	49	0	0	184
2003	2	244	42	0	0	288
2004	3	193	46	0	0	242
2005	8	204	211	0	0	423
2006	6	180	40	0	0	226
2007	1	144	34	0	0	179
2008	5	138	57	0	0	200
2009	7	58	87	0	0	152
2010	9	196	152	0	0	357
2011	0	112	134	0	0	246
2012	3	249	138	0	0	390
2013	3	17	73	0	0	93
2014	0	19	73	0	0	92
2015	6	380	111	0	0	497
2016	1	48	73	0	0	122
2017	0	117	72	0	0	189
2018	5	44	59	0	0	108
Total	100	3164	1737	0	0	5001