Year	%
2000	12.5
2001	12
2002	11.4
2003	11.5
2004	11
2005	10.8
2006	10.4
2007	10.4
2008	10.1
2009	9.8
2010	9.7
2011	9.4
2012	9.4
2013	9.1
2014	8.8
2015	8.8
2016	8.5
2017	8.2
2018	8.1
2019	7.9