Year	Percent
1990	0
1995	0.00518
1996	0.25298
1997	0.98933
1998	1.93604
1999	5.68815
2000	13.93955
2001	18.23711
2002	22.3898
2003	26.40833
2004	30.29805
2005	32.35901
2006	33.51571
2007	35.05
2008	34.51
2009	33.99
2010	42
2011	50
2012	58
2013	66
2014	70
2015	74.00175