Year	Percent
1990	0.58419
1991	1.16052
1992	1.49787
1993	1.71636
1994	3.41281
1995	5.09802
1996	9.0436
1997	23.72795
1998	33.46751
1999	41.43278
2000	45.68765
2001	51.76566
2002	70.57
2003	79.13
2004	83.89
2005	84.83
2006	87.76
2007	82.01
2008	90
2009	91
2010	90
2011	92.76999
2012	93.17999
2013	94.7836
2014	92.52
2015	90.6102
2016	89.65095
2017	96.40965