Year	Percent
1990	0
1994	0
1995	0
1996	0
1997	0.00123
1998	0.00481
1999	0.00879
2000	0.02579
2001	0.14019
2002	0.43948
2003	0.53847
2004	0.79156
2005	1.29204
2007	8.66
2010	16.7
2011	17.46
2012	21
2013	22.7
2014	24.64
2015	26.61
2016	28