Year	%
2000	12.4
2001	12.5
2002	13
2003	12.8
2004	13.1
2005	13.4
2006	13.5
2007	12.9
2008	12.9
2009	12.8
2010	12.3
2011	11.9
2012	12
2013	11.6
2014	11.1
2015	10.9
2016	11.3
2017	10.5
2018	10.5
2019	10.3