Year	Percent
1990	0
1991	0.10023
1992	0.25043
1993	0.45016
1994	0.71891
1995	1.49433
1996	2.98088
1997	4.953
1998	9.87045
1999	14.74234
2000	16.43047
2001	18.08714
2002	19.37
2003	29.67
2004	31.78
2005	34.99
2006	38.01
2007	42.09
2008	44.13
2009	48.27
2010	53.3
2011	55.25
2012	60.34
2013	62.0956
2014	64.59
2015	68.6329
2016	70.42357
2017	73.79121