Year	Percent
1990	0
2000	42.18486
2001	46.64614
2002	48.04712
2003	49.49117
2004	52.4902
2005	55.46483
2006	61.47604
2007	64.37768
2008	67.25
2009	70.1
2010	75
2011	80.3
2012	87
2013	90.7
2014	92.4
2015	93.3633
2016	95.20818