Year	Percent
1990	0
1994	0.00083
1995	0.00346
1996	0.00464
1997	0.02813
1998	0.26082
1999	0.6007
2000	1.28285
2001	1.48781
2002	3.78724
2003	7.40754
2004	10.62939
2005	14.63027
2006	19.62065
2007	20.45
2008	23.39
2009	27.5
2010	32.3
2011	38
2012	43.37
2013	60
2014	67
2015	69
2016	71