Year	%
2001	9.56
2002	9.02
2004	8.56
2005	8.54
2006	8.5
2007	8.25
2008	8.24
2009	8.23
2010	8.13
2011	8.13
2012	8.1
2013	8.11
2014	8.11
2015	8.12
2016	8.19
2017	8.4
2018	8.48
2019	10
2020	8.43
2021	8.44