Year	%
1995	30.63
1996	30.58
1997	30.58
1998	30.58
1999	30.58
2000	30.58
2001	30.58
2002	30.58
2003	30.58
2004	30.58
2005	30.58
2006	30.58
2007	30.59
2008	30.59
2009	30.59
2010	30.59
2011	30.59
2012	30.6
2013	30.57
2014	30.57
2015	30.57
2016	30.57
2017	30.59
2018	30.59
2019	30.59
2020	30.59
2021	30.59