Year	%
2000	11.2
2001	10.8
2002	10.7
2003	10.5
2004	10.1
2005	9.9
2006	9.6
2007	9.6
2008	9.6
2009	9.5
2010	9.3
2011	9.4
2012	9.2
2013	9.4
2014	9.1
2015	9.2
2016	9.2
2017	9
2018	9.1
2019	9