Year	%
1996	6.1
1997	5.1
1998	5.2
1999	5.4
2000	5.4
2001	5.8
2002	6.3
2003	6.3
2004	6.2
2005	6.2
2006	6.3
2007	6.2
2008	6.1
2009	6.1
2010	5.7
2011	5.6
2012	5.9
2013	6.1
2014	6.4
2015	6.7
2016	6.7
2017	6.3
2018	6.5
2019	6.8
2020	7
2021	7