Year	%
2001	28.34
2002	28.34
2003	28.55
2004	28.55
2005	28.55
2006	28.55
2007	28.4
2008	28.4
2009	28.4
2010	28.4
2011	28.4
2012	28.4
2013	28.4
2014	28.4
2015	29.37
2016	29.37
2017	29.53
2018	29.53
2019	29.53
2020	29.53
2021	29.53