Year	%
1997	57.37
2001	57.37
2002	57.37
2003	57.37
2004	56.36
2005	56.36
2006	56.36
2007	55.39
2008	55.39
2009	55.39
2010	55.39
2011	55.39
2012	53.75
2013	53.75
2015	53.75
2016	53.75
2018	54.5
2020	54.46
2021	54.46