Year	Percent
1990	0
1994	0.00143
1995	0.00206
1996	0.00635
1997	0.02519
1998	0.03749
1999	0.09923
2000	0.14776
2001	0.30556
2002	4.99971
2005	8.03038
2006	11.99218
2007	14.54
2008	17.08
2009	27.4
2010	46
2011	50
2012	54.2
2013	73
2014	75.00002
2015	77
2016	78.2
2017	79