Year	% of total
1960	0
1961	0
1962	0
1963	0
1964	0
1965	0
1966	0
1967	0
1968	0
1969	0
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0.53475935828877
1989	0.3968253968253968
1990	0.4721459227467811
1991	0.31476394849785405
1992	0.14268482490272372
1993	1.02676
1994	1.4049808429118773
1995	3.3215579710144922
1996	2.878532423208191
1997	1.370841121495327
1998	1.1204722222222223
1999	0.27780303030303033
2000	0
2001	0
2002	0.1601310043668122
2003	0.490022271714922
2004	0.47623376623376623
2005	0.45271604938271603
2006	0.3950089766606822
2007	0.3548709677419355
2008	0.34378125
2009	0.4962857142857143
2010	0.6781081081081081
2011	0.48441215323645975
2012	0.7373324396782842
2013	1.0529463171036204
2014	0.8557759626604435
2015	0.5136961206896552
2016	0.4435887096774193