Year	%
1981	5
1989	5.3
1992	5.4
1995	5.4
1996	5.4
1997	5.4
1998	5.1
2000	5.1
2001	4.8
2002	4.7
2003	5.1
2004	4.7
2005	4.8
2006	4.9
2007	4.8
2008	5
2009	4.8
2010	5
2011	5.4
2012	5.6
2013	5.5
2014	5.6
2015	5.6
2016	5.7
2017	5.9
2018	5.9
2019	5.8
2020	5.7
2021	5.7
2022	5.6