Year	%
2001	15.46
2002	15.36
2003	15.33
2004	15.41
2005	15.37
2006	13.39
2007	13.25
2008	13.25
2009	13.25
2010	13.25
2011	13.24
2012	13.24
2013	13.25
2014	13.32
2015	14.29
2016	13.04
2017	18.44
2018	18.16
2019	15.31
2020	15.31
2021	14.49