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	0.1558654284166035
1994	1.2906214264603346
1995	1.0247187961774344
1996	1.0584087105598428
1997	1.005973515589097
1998	0.9577741190567797
1999	0.9584444891964253
2000	0.9840079167363815
2001	0.9452682562634828
2002	1.2279086963931147
2003	1.8594315842613982
2004	1.9021164072988983
2005	1.7848280409869375
2006	1.6282955029700574
2007	1.6276942063848308
2008	1.700148404956052
2009	1.6274601855221535
2010	1.5250128546758632
2011	1.604419163321824
2012	1.70434294902191
2013	1.7991980232751628
2014	2.0463385366443303