Year	%
2003	6.3
2004	5.7
2005	6.5
2006	6.6
2007	6.2
2008	6.9
2009	7
2010	6.7
2011	7.2
2012	6.7
2013	5.4
2014	6.3
2015	6.1
2016	6.5
2017	6.3