Year	% of total
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	0.8130081300813009
2002	0.6578947368421052
2003	1.1363636363636365
2004	1.0752688172043012
2005	1.0582010582010581
2006	1.3574660633484164
2007	5.1020408163265305
2008	1.6260162601626018
2009	2.631578947368421
2010	2.2346368715083798
2011	3.90625
2012	4.504504504504505
2013	5.376344086021505
2014	3.4482758620689653
2015	6.172839506172839