Year	%
1996	29.98
1997	29.98
1998	29.98
1999	29.98
2000	29.98
2001	29.98
2002	29.98
2003	29.98
2004	29.98
2005	28.82
2006	28.82
2007	28.7
2008	28.7
2010	28.27
2011	28.27
2012	28.33
2013	28.33
2015	28.31
2019	28.73
2021	28.73