Year	Percent
1990	0.05278
1991	0.14011
1992	0.27905
1993	0.59062
1994	0.89987
1995	1.63795
1996	2.58403
1997	4.255
1998	6.31978
1999	9.12532
2000	14.30792
2001	26.3259
2002	30.18
2003	36.14
2004	39.15
2005	42.87
2006	46.87
2007	66.09
2008	70.68
2009	71.58
2010	77.28
2011	77.82
2012	81.44
2013	81.9198
2014	83.75
2015	78.01
2016	79.27
2017	80.5