Year	Percent
1990	0
1996	0.06585
1997	0.13183
1998	0.26409
1999	3.96635
2000	6.61149
2001	13.20699
2007	13.8
2008	18.2
2009	23.9
2010	29.9
2011	30
2012	30.5
2013	31
2014	32
2015	34
2016	35.66