Year	%
2000	11.5
2001	10.8
2002	10.3
2003	10.1
2004	9.3
2005	9.6
2006	9.1
2007	9
2008	8.8
2009	8.2
2010	8.2
2011	7.8
2012	7.8
2013	7.8
2014	7.5
2015	7.4
2016	7.2
2017	7
2018	6.8
2019	6.8