Year	%
2000	9.3
2001	9.1
2002	9
2003	8.8
2004	8.4
2005	8.3
2006	8
2007	8
2008	7.8
2009	7.8
2010	7.6
2011	7.7
2012	7.7
2013	7.4
2014	7.3
2015	7.3
2016	7
2017	7.1
2018	6.9
2019	6.8