Year	Percent
1990	0
1993	0.00668
1994	0.00791
1995	0.00912
1996	0.06444
1997	0.22345
1998	0.63317
1999	0.94246
2000	1.49685
2001	1.85798
2002	6.15265
2003	6.72543
2004	7.41294
2005	8.45364
2006	9.60004
2007	10.89783
2008	13
2009	17
2010	20
2011	28
2012	33.74236
2013	35.2
2014	37.4
2015	42.5
2016	46.50698