Year	%
1997	93.07
1998	92.85
1999	92.85
2000	92.85
2001	92.85
2002	92.85
2003	92.85
2004	92.88
2005	92.84
2006	92.88
2007	92.88
2008	92.06
2009	92.06
2010	92.06
2011	92.06
2012	80.18
2013	80.18
2015	80.18
2020	80.5
2021	80.5