Year	Percent
1990	0
1991	0.00338
1992	0.04835
1993	0.19341
1994	0.48358
1995	0.67749
1996	0.96924
1997	1.94245
1998	3.89464
1999	5.85784
2000	6.99968
2001	14.52855
2002	16.67
2003	21.63
2004	27.74
2005	38.97
2006	47.06
2007	53.3
2008	61
2009	62
2010	65
2011	68.01999
2012	70.58
2013	72.6439
2014	75.6532
2015	72.8347
2016	79.2594
2017	76.75055