Year	Percent
1994	78.4359
1995	66.11046
1996	79.61105
1997	79.19786
1998	85.38394
1999	86.56069
2000	75.84475
2001	76.29165
2002	73.33568
2003	73.369
2004	76.89666
2005	84.36422
2006	82.91283
2007	87.92881
2008	90.04304
2009	72.25713
2010	81.65723
2011	90.64577
2012	88.1234
2013	87.91837
2014	90.94547
2015	86.89325
2016	85.54514
2017	91.36653