Year	%
1987	4
1991	4
1995	3.2
2000	5.7
2003	6.2
2004	6
2005	5.9
2006	6.5
2007	6.8
2008	6.7
2009	7.1
2010	7.2
2011	6.7
2012	6.4
2013	6.7
2014	6.7
2015	6.5
2016	6.5
2017	6.9
2018	6.8
2019	7.2
2020	6.6
2021	6.7