Year	%
1994	86.55475
1995	91.25128
1996	91.71768
1997	90.88262
1998	89.88365
1999	90.7793
2000	91.57768
2001	92.49608
2002	93.55026
2003	94.31245
2004	95.16357
2005	95.88113
2006	96.68165
2007	97.42165
2008	97.69735
2009	97.4756
2010	97.53669
2011	97.22314
2012	96.76748
2013	96.25644
2014	97.89643
2015	97.68413
2016	97.94198
2017	98.04459