Year	%
1995	68.1
1997	68.1
2001	68.09
2002	68.09
2003	67.2
2004	67.2
2005	67.2
2006	67.2
2007	66.18
2008	66.18
2009	66.18
2010	66.18
2011	66.18
2012	66.18
2013	63.21
2015	63.21
2016	63.21
2017	63.21