Year	Percent
1990	0
1996	0.27742
1997	0.97842
1998	1.97206
1999	2.92305
2000	6.42707
2001	7.17936
2002	17.69
2003	25.91
2004	31.23
2005	36.22
2006	43.9
2007	49.9
2008	55.22
2009	59.76
2010	62.12
2011	63.63998
2012	67.22999
2013	68.4529
2014	72.13
2015	71.378
2016	74.37665
2017	77.61526