Year	%
2000	12.8
2001	13
2002	13.9
2003	13.7
2004	14
2005	14.4
2006	14.4
2007	13.9
2008	14
2009	13.6
2010	13.1
2011	12.9
2012	12.8
2013	12.4
2014	11.9
2015	11.7
2016	11.9
2017	11.4
2018	11.3
2019	11