Year	Percent
1990	0
1996	0.81272
1997	2.05345
1998	3.31527
1999	4.38741
2000	6.31906
2001	7.21935
2002	21.94
2003	26.98
2004	38.58
2005	46
2006	53.63
2007	59.17
2008	63.41
2009	66.84
2010	68.42
2011	69.74995
2012	73.11994
2013	75.2344
2014	75.83
2015	79.2006
2016	79.8421
2017	81.31586