Year	%
1995	87.92
1996	76.15
1997	68.53
1998	76.74
1999	74.2
2000	73.25
2001	70.25
2002	66
2003	72.68
2004	87.89
2005	88.39
2006	89.02
2007	88.95
2008	88.56
2009	88.14
2010	88.13
2011	85.51
2012	88.75
2013	85.77
2014	90.83
2015	88.5
2016	87.91
2017	16.68