Year	Percent
1995	94.08623
1996	94.23812
1997	94.45557
1998	94.49439
1999	94.63611
2000	94.87155
2001	94.86486
2002	95.03742
2003	95.21235
2004	95.05885
2005	94.76162
2006	94.71679
2007	94.68518
2008	94.52605
2009	94.21686
2010	93.99812
2011	94.38278
2012	94.52297
2013	94.24654
2014	94.24981
2015	94.30525
2016	94.40127
2017	94.76037