Year	%
1994	78.45516
1995	84.18167
1996	84.62335
1997	83.96508
1998	83.10635
1999	84.68391
2000	86.15038
2001	87.93249
2002	89.4702
2003	90.75405
2004	90.6921
2005	93.55264
2006	95.86404
2007	96.64828
2008	96.44065
2009	96.61746
2010	97.08446
2013	93.97242
2014	95.56477
2015	96.08988
2016	95.88959
2017	96.00385