Year	%
1980	6.9
1985	7.2
1990	7.7
1993	6.4
1994	6.5
1995	6.4
1996	6
1997	6.5
1998	6.6
1999	7.1
2000	6.9
2003	7.2
2004	6.9
2005	7
2006	6.7
2007	6.7
2008	6.6
2009	6.3
2010	6.3
2011	6
2012	6.1
2013	5.7
2014	5.7
2015	5.8
2016	5.7
2017	6.2
2018	6.2
2019	6.2
2020	6
2021	6.4