Year	Percent
1990	0
1992	0.05006
1993	0.05637
1994	0.11103
1995	0.41012
1996	0.67334
1997	4.37827
1998	8.89054
1999	11.3424
2000	15.25539
2001	18.81876
2002	28.32
2003	30.09
2004	33.83
2005	32.81
2006	35.83
2007	40.77
2008	42.31
2009	49.81
2010	52.99
2011	56.85989
2012	60.68987
2013	65.4548
2014	69.33
2015	71.7159
2016	75.90036
2017	80.74319