Year	%
2000	17.9
2001	17.9
2002	17.46
2003	17.46
2004	17.46
2005	17.46
2006	17.46
2007	17.46
2008	16.1
2009	16.1
2010	16.1
2011	16.1
2012	16.97
2013	16.97
2014	16.97
2015	16.97
2016	16.97
2018	17.07
2019	17.07
2020	17.07
2021	17.07