Year	%
1996	20.82
1999	17.39
2000	9.24
2001	9.28
2002	9.27
2003	9.28
2006	9.04
2007	9.04
2008	9.04
2009	9.04
2010	8.76
2011	8.75
2012	8.95
2013	8.95
2014	8.8
2015	8.8
2016	8.81
2017	8.81
2018	8.97
2019	10.33
2020	8.7