Year	Percent
1990	0
1995	2.20077
1996	2.85845
1997	3.48054
1998	4.07172
1999	5.30068
2000	6.48223
2001	8.89929
2002	12.5
2003	17.22865
2004	24.26654
2005	27
2006	30
2007	34
2008	38
2009	42
2010	47
2011	52
2012	58
2013	63.4
2014	67.78
2015	70
2016	73