Year	%
1995	28.36
1997	28.3
1998	28.36
1999	28.3
2000	28.3
2001	28.3
2002	28.3
2003	28.3
2004	28.23
2005	28.23
2006	28.23
2007	28.35
2008	28.35
2009	28.35
2010	28.35
2011	28.35
2012	28.35
2013	28.35
2014	28.31
2015	28.23
2016	28.23
2017	28.23
2018	28.23
2019	28.2