Year	%
1995	79.16
1997	66.48
1998	86.01
1999	87.22
2000	72.49
2001	91.48
2002	82.24
2003	82.16
2004	87.97
2005	91.97
2006	91.98
2007	94.56
2008	91.29
2009	92.02
2010	90.05
2011	91.3
2012	92.04
2013	90.35
2014	95.03
2015	92.08
2016	91.36
2017	9.03