Year	%
1996	87.36
1997	87.36
1998	87.19
1999	87.36
2000	87.36
2001	87.36
2002	86.78
2003	86.78
2004	86.78
2005	86.78
2006	86.78
2007	87.4
2008	87.4
2009	87.4
2010	87.4
2011	87.4
2012	88.96
2013	88.96
2014	88.96
2015	88.96
2016	88.96
2017	88.87
2018	88.87
2019	88.8
2020	88.8
2021	88.8