Year	Percent
1994	40.06314
1995	59.34392
1996	71.82536
1997	62.5319
1998	65.21224
1999	74.18469
2000	91.25914
2001	84.29506
2002	82.40508
2003	91.92935
2004	95.03698
2005	81.68453
2006	77.40531
2007	77.01434
2008	84.72007
2009	72.73788
2010	82.63098
2011	92.58048
2012	87.13608
2013	76.98701
2014	81.29305
2015	81.48481
2016	80.96345
2017	82.58274