Year	%
1996	61.73
1997	61.78
1998	61.78
1999	61.78
2000	61.78
2001	61.78
2002	61.73
2003	60.76
2004	60.76
2005	60.76
2006	60.76
2007	60.76
2008	60.76
2009	59.45
2010	59.45
2011	59.45
2012	59.45
2013	59.45
2015	57.81
2016	57.81
2017	57.81
2019	58.34
2020	58.34
2021	58.34