Year	%
1993	13.3
1996	11.62
1997	11.5
1998	11.62
1999	11.54
2000	11.53
2001	11.69
2002	11.57
2003	11.7
2004	11.64
2005	11.63
2006	11.62
2007	11.6
2008	11.59
2009	11.51
2010	11.51
2011	11.51
2012	11.52
2013	10.99
2015	10.98
2016	10.98
2017	10.98
2019	10.98
2020	10.98
2021	10.98