Year	%
1984	8.1
1987	8.9
1990	8.8
1993	8.7
1996	8.1
1998	8.7
1999	8.9
2000	9.4
2001	9.4
2002	8.8
2003	8.6
2004	8.2
2005	8.2
2006	7.9
2007	7.6
2008	7.7
2009	7.8
2010	7.4
2011	6.9
2012	7
2013	7
2014	7
2015	6.9
2016	6.8
2017	6.7
2018	6.8
2019	7.1
2020	7.1
2021	7
2022	7.3
2023	7.3