Year	%
1980	2.6
1985	2.7
1990	2.9
1993	2.2
1994	2.3
1995	2.2
1996	2
1997	2.2
1998	2.4
1999	2.6
2000	2.5
2003	2.6
2004	2.4
2005	2.5
2006	2.3
2007	2.4
2008	2.3
2009	2.1
2010	2.1
2011	1.9
2012	2
2013	1.8
2014	1.8
2015	1.9
2016	1.8
2017	2.1
2018	2.1
2019	2
2020	1.9
2021	2.2