Year	Percent
1990	0.09728
1991	0.19406
1992	0.38691
1993	0.57833
1994	1.34431
1995	3.82566
1996	5.71499
1997	11.382
1998	22.66875
1999	30.59204
2000	39.17243
2001	42.95752
2002	64.25
2003	76.26
2004	80.93
2005	82.74
2006	86.65
2007	85.03
2008	85.02
2009	86.84
2010	88.72
2011	89.81001
2012	92.26001
2013	94.6297
2014	95.99
2015	96.3305
2016	96.96779
2017	97.09936