Year	Percent
1990	0
1996	0.09097
1997	0.21439
1998	1.31616
1999	3.4489
2000	6.35706
2001	6.25159
2002	8.20022
2003	14.12429
2004	17.88454
2005	21.54219
2006	25.10796
2007	28.59
2008	33.87
2009	44.6
2010	49
2011	49
2012	52.87663
2013	56.8
2014	60.68
2015	64.56021
2016	68.44042