Year	%
1979	5.7
1986	4.5
1991	4.7
1995	5.5
2000	5
2003	5.8
2004	5.9
2005	6.3
2006	8
2007	6.8
2008	7.2
2009	7.1
2010	7.1
2011	6.9
2012	7.1
2013	7.1
2014	7.6
2015	8
2016	9.2
2017	8.2
2018	8
2019	8.3