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	1.2345679012345678
1980	0.7407407407407407
1981	0.6097560975609756
1982	0.6024096385542169
1983	0.5263157894736842
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0.7333999999999999
2000	0.7051923076923077
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0.5641538461538461
2012	0.5093055555555556
2013	0.4701282051282051
2014	0.9054320987654321
2015	1.1829032258064516
2016	5.238571428571428