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
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	59.3704761904762
2002	56.87034739454094
2003	50.38571705426356
2004	47.54455172413793
2005	54.16644004944375
2006	46.75825327510917
2007	45.16966887417219
2008	52.67739420935412
2009	46.61569358178054
2010	48.418266806722684
2011	54.87282183316169
2012	51.32334665334665
2013	52.12238502673797
2014	54.438405438813355
2015	49.2528431372549
2016	60.767428571428574