Year	% of total
1990	59.96479493046999
1991	57.89599155399653
1992	78.91956006038386
1993	87.9862207549878
1994	78.99538698103537
1995	87.44082840236686
1996	85.84446770519057
1997	83.5696413678065
1998	79.01824753687401
1999	75.34571013828405
2000	75.7036237748404
2001	79.11154435315416
2002	81.77402567364403
2003	82.2392181856809
2004	80.535409556314
2005	71.71002428026362
2006	71.63202782147884
2007	72.99925760950259
2008	74.2402641254596
2009	74.11049648296114
2010	0
2011	0
2012	0
2013	0
2014	0