Year	%
1980	6
1988	7.2
1989	7.2
1991	7.6
1992	8
1996	7
1999	6.5
2000	6.7
2001	6.9
2002	6.8
2003	7.5
2004	7.1
2005	7.3
2008	6.9
2009	7.1
2010	7.1
2011	7.3
2012	7.5
2013	7.5
2014	7.6
2015	7.9
2016	8.1
2017	8.3
2018	8.1
2019	7.9
2020	7.5
2021	7
2022	7.1