Year	%
1983	8.8
1987	9.7
1990	8.3
1993	7.9
1999	9.1
2004	8.4
2005	8.7
2006	8.7
2007	8.8
2008	8.7
2009	9
2010	9
2011	9.1
2012	9.1
2013	8.9
2014	8.8
2015	8.9
2016	8.8
2017	8.8
2018	8.9
2019	8.6
2020	9.2
2021	9.4