Year	Percent
1990	0.02029
1991	0.04044
1992	0.09668
1993	0.40128
1994	0.79968
1995	1.59436
1996	4.37298
1997	9.16308
1998	13.41404
1999	21.39129
2000	29.99074
2001	38.53206
2002	46.5942
2003	48.43527
2004	62.39393
2005	66.92107
2006	68.68527
2007	74.3
2008	75.4
2009	78
2010	78.21
2011	79.05411
2012	79.4964
2013	88.21943
2014	89.10683
2015	91.05803
2016	93.18272
2017	90.87304