Year	Percent
1990	0
1991	0.00329
1992	0.01295
1993	0.0255
1994	0.03767
1995	0.10514
1996	0.45079
1997	0.78608
1998	1.47787
1999	2.03873
2000	2.87069
2001	4.52849
2002	9.14943
2003	13.20759
2004	19.07367
2005	21.02275
2006	28.17838
2007	30.88
2008	33.83
2009	39.22
2010	40.65
2011	45.69
2012	48.56
2013	51.04
2014	54.551
2015	58.32795
2016	60.87254