Year	Percent
1990	0
1994	0.02725
1995	0.1351
1996	0.26816
1997	1.33182
1998	2.64765
1999	5.26568
2000	10.47465
2001	15.63003
2002	17.54765
2003	19.70703
2004	22.13074
2005	23.40005
2006	25.44242
2007	27.86
2008	38
2009	41.5
2010	45.3
2011	48
2012	68.99998
2013	68.99999
2015	63.47
2016	68.64