Year	%
1996	79.69
1997	79.69
1999	79.69
2000	79.69
2001	79.69
2002	79.41
2003	79.41
2004	79.41
2005	79.41
2006	79.41
2007	78.69
2008	78.69
2009	78.69
2010	78.69
2011	77.03
2012	77.03
2013	77.03
2015	77.03
2016	77.03
2017	76.98
2018	76.98
2019	76.92
2020	76.92
2021	76.92