Year	%
2000	18.4
2001	17.9
2002	17.3
2003	16.5
2004	15.8
2005	15.1
2006	15.1
2007	14.7
2008	14.1
2009	13.9
2010	13.5
2011	12.9
2012	12.7
2013	12.3
2014	12.3
2015	11.9
2016	11.9
2017	11.2
2018	11.3
2019	10.8