Year	Percent
1990	0.59571
1991	1.17996
1992	1.75171
1993	2.16727
1994	2.72
1995	3.55201
1996	4.54966
1997	15.1
1998	24.8
1999	34
2000	47.1
2001	55.1
2002	61.4
2003	65.1
2004	67.8
2005	70.1
2006	75.7
2007	77.2
2008	79.2
2009	81.3
2010	83.9
2011	85.19303
2012	85.2
2013	86.34
2014	87.4
2015	87.47906
2016	89.13469
2017	93.71387