Year	Percent
1995	87.43357
1996	86.99645
1997	86.17384
1999	94.21571
2000	94.15282
2001	95.74198
2002	92.90476
2003	97.45973
2004	90.47664
2005	93.00887
2007	86.12953
2008	87.75898
2009	89.7329
2010	94.69743
2011	91.20485
2012	91.10972
2013	94.13382
2014	97.35582
2015	95.79075
2016	93.40588