Year	%
1995	87.4
1996	85.31
1997	86.33
1998	81.62
1999	83.41
2000	85.16
2001	88.62
2002	88.99
2003	89.38
2004	85.85
2005	86.93
2006	87.75
2007	88.92
2008	89.92
2009	87.41
2010	89.34
2011	89.64
2012	90.4
2013	88.87
2014	94.2
2015	91.46
2016	92.64
2017	28.38