Year	Percent
1995	84.73499
1996	84.83995
1997	69.69138
1998	70.86815
1999	70.95501
2000	84.63104
2001	84.33563
2002	84.25594
2003	84.24144
2004	85.04204
2005	85.31267
2006	85.38698
2007	85.46224
2008	85.22941
2009	84.67306
2010	84.14897
2011	84.17783
2012	84.38276
2013	84.4353
2014	84.38493
2015	84.60507
2016	84.05384
2017	83.66043