Year	%
1992	79.44193
1993	80.98839
1994	83.0603
1996	82.92926
1999	88.4342
2000	89.21189
2001	91.39201
2002	92.07787
2003	92.8159
2004	93.13615
2005	93.35749
2006	93.89219
2007	93.78152
2008	94.33598
2009	94.72902
2010	95.70571
2011	96.29303
2012	96.10331
2013	96.34359
2014	96.77
2015	96.31618
2016	96.36549