Year	%
1982	2.9
1992	2.8
2000	3.1
2002	3.3
2006	2.9
2007	2.9
2008	3
2009	3.1
2010	3.1
2011	3.2
2012	3.3
2013	3.3
2014	3.2
2015	3.2
2016	3
2017	3.1
2018	2.9
2019	2.9
2020	2.9