Year	Percent
1990	0
1995	0
1996	2.31879
1997	4.6013
1998	11.33787
1999	22.29754
2000	32.91639
2001	43.24698
2002	53.29922
2003	58.91264
2004	66.5336
2005	67.90263
2006	69.35945
2007	75.98
2008	75.57
2009	75.18
2010	75.2
2011	80.73217
2012	85.33519
2013	90
2014	93.3
2015	94.2
2016	95.10868