Year	%
2001	13.8
2002	8.77
2005	6.64
2007	6.64
2008	6.58
2009	6.55
2010	6.56
2011	6.56
2013	6.54
2015	6.54
2016	6.55
2017	6.55
2018	6.55
2021	6.55