Year	Percent
1990	0
1998	0.07281
1999	0.20471
2000	1.0414
2001	3.00294
2002	2.99927
2003	3.90877
2004	5.09039
2005	10.5338
2006	12.30691
2007	14.03
2008	15.7
2009	16
2010	16.3
2011	17.5
2012	19.8
2013	23
2014	28.3
2015	30.24704
2016	34.5