Year	%
1992	84.75618
1993	87.01699
1994	88.77337
1996	88.00468
1999	91.6781
2000	92.00894
2001	94.08076
2002	94.52016
2003	95.37538
2004	95.42928
2005	95.30264
2006	95.48848
2007	94.7039
2008	95.3849
2009	95.87122
2010	96.98848
2011	97.40805
2012	96.98047
2013	97.18998
2014	97.35168
2015	96.13582
2016	96.77178