Year	%
2000	14.3
2001	14.7
2002	14.2
2003	14.4
2004	13.9
2005	13.7
2006	13.4
2007	13.5
2008	12.9
2009	13.1
2010	12.9
2011	12.7
2012	12.5
2013	12.3
2014	11.9
2015	11.6
2016	11.1
2017	10.6
2018	10.3
2019	10