Year	Percent
1990	0
1997	0.04146
1998	0.09442
1999	0.09742
2000	0.13235
2001	0.16526
2002	0.3212
2003	0.52052
2004	0.84393
2005	1.14979
2006	1.27919
2007	1.55712
2008	1.82
2009	2.13
2010	6
2011	11.5
2012	13.94318
2013	16.4
2014	18.86
2015	21.32
2016	23.78