Year	%
1993	9.76
1994	9.99
1995	9.66
1996	9.64
1997	9.64
1998	9.63
1999	9.63
2000	9.14
2001	9.14
2002	9.59
2003	9.05
2004	9.21
2005	8.05
2006	8.01
2007	8.01
2008	8
2009	10.02
2010	11.17
2011	11.15
2012	11.15
2013	11.65
2014	11.65
2015	11.65
2016	11.65
2017	11.83
2018	11.83
2019	11.83
2020	11.83
2021	11.86