Year	%
1994	80.0879
1995	85.3059
1996	85.66264
1997	84.96394
1998	84.07325
1999	85.49218
2000	86.81142
2001	88.47075
2002	89.92144
2003	91.13736
2004	91.11713
2005	93.77939
2006	95.91994
2007	96.68907
2009	96.65861
2010	97.08002
2013	94.18937
2014	95.64163
2015	96.11886
2016	95.91668
2017	95.99507