Year	%
1995	39.5
1997	39.41
1998	39.41
1999	39.41
2000	39.41
2001	39.41
2002	39.25
2003	39.25
2004	39.25
2005	39.25
2006	39.25
2007	39.51
2008	39.51
2009	39.51
2010	39.51
2011	39.51
2012	39.47
2013	39.47
2014	39.47
2015	39.47
2020	39.55
2021	39.55