Year	%
1994	78.34131
1995	84.13453
1996	84.58145
1997	83.91482
1998	83.04876
1999	84.64297
2000	86.12694
2001	87.91191
2002	89.45833
2003	90.74643
2004	90.69333
2005	93.57469
2006	95.91298
2007	96.70048
2008	96.49053
2009	96.66223
2010	97.12747
2013	93.97405
2014	95.58352
2015	96.10863
2016	95.89781
2017	96.01004