Year	%
1996	26.07
1997	27
1999	27
2000	27
2001	27
2002	26.86
2003	26.86
2004	26.86
2005	26.86
2006	26.86
2007	27.16
2008	27.16
2009	27.16
2010	27.16
2011	27.16
2012	27.32
2013	27.32
2014	27.32
2015	27.32
2016	27.32
2017	27.54
2018	27.54
2019	27.54
2020	27.54
2021	27.54