Year	%
2000	12.9
2001	12.8
2002	11.9
2003	11.9
2004	12.1
2005	11
2006	11.3
2007	10.1
2008	10
2009	9.8
2010	11.1
2011	10.3
2012	10.3
2013	10.1
2014	9.7
2015	9.8
2016	10
2017	10.2
2018	9.6
2019	9.5