Year	%
1996	84.22
1997	84.22
1998	84.22
1999	84.22
2000	84.22
2001	84.22
2002	84.22
2003	84.22
2004	83.9
2005	83.9
2006	83.9
2007	83.9
2008	82.74
2009	82.74
2010	82.74
2011	82.74
2012	82.74
2013	81.31
2014	81.31
2016	81.31
2020	81.57
2021	81.57