Year	Percent
1990	0
1991	0.1615
1992	0.47137
1993	0.76328
1994	1.1852
1995	2.87342
1996	8.34996
1997	13.47162
1998	19.59077
1999	24.15544
2000	36
2001	41.67043
2002	47
2003	53.83794
2004	62
2005	61
2006	59
2007	69.9
2008	69
2009	69
2010	71
2011	71
2012	72
2013	80.90206
2014	79.02924
2015	79.01296
2016	84.45
2017	84.44954