Year	%
2000	10.6
2001	10.4
2002	10.3
2003	10
2004	9.8
2005	9.7
2006	9.4
2007	9.2
2008	9.2
2009	8.9
2010	8.6
2011	8.2
2012	8.4
2013	8.3
2014	7.7
2015	7.8
2016	7.6
2017	7.6
2018	7.2
2019	7.1