Year	Percent
1990	0
1999	0.13362
2000	0.18704
2001	0.36653
2002	2.24442
2003	2.81452
2004	3.53284
2005	3.91779
2006	4.30105
2007	4.722
2008	9
2009	10.8
2010	14
2011	14
2013	16.5
2014	17.76
2015	19.01608
2016	20.27216