Year	%
1995	6.62
1996	6.61
1997	6.61
1998	6.61
1999	6.61
2000	6.61
2001	6.61
2002	6.62
2003	6.62
2004	6.62
2005	6.62
2006	6.62
2007	12.25
2008	12.52
2009	12.46
2010	12.61
2011	12.63
2012	12.6
2013	12.38
2014	12.37
2015	6.88
2016	6.88
2017	6.88
2018	6.88
2019	6.89
2020	6.89
2021	6.89