Year	%
1996	19.77
1997	19.77
1998	19.77
1999	19.77
2000	19.77
2001	19.77
2002	19.77
2003	20.37
2004	20.37
2005	20.37
2006	20.37
2007	20.37
2008	20.37
2009	20.91
2010	20.91
2011	20.91
2012	20.91
2013	20.91
2015	21.62
2016	21.62
2017	21.62
2019	21.77
2020	21.77
2021	21.77