Year	%
2000	14
2001	14.3
2002	14.8
2003	14.2
2004	14.5
2005	14.6
2006	13.2
2007	14
2008	14.3
2009	14.2
2010	14
2011	13.9
2012	14
2013	13.5
2014	14.1
2015	13.2
2016	13.7
2017	13.6
2018	13.5
2019	13.4