Year	Percent
1990	0.13037
1991	0.25908
1992	0.64282
1993	0.76534
1994	1.39342
1995	1.89021
1996	6.90916
1997	9.53397
1998	15.42122
1999	23.04432
2000	33.73013
2001	39.18545
2002	36.56
2003	42.7
2004	54.28
2005	58
2006	63.6
2007	69.37
2008	72.87
2009	73.45
2010	75.17
2011	78.73999
2012	80.02999
2013	80.6188
2014	80.99582
2015	83.94014
2016	84.32333
2017	87.93559