Year	%
2000	10.9
2001	10.7
2002	10.2
2003	10
2004	9.5
2005	9.6
2006	8.8
2007	8.7
2008	8.4
2009	8.4
2010	7.9
2011	8
2012	7.8
2013	7.5
2014	7.4
2015	7.3
2016	7.3
2017	7.3
2018	7.2
2019	7