Year	%
1981	1.1
1986	1.5
1989	0.9
1990	1
1991	1
1992	1.1
1993	1
1994	1.1
1995	1.1
1996	1
1997	1.3
1998	1.4
1999	1.2
2000	1.1
2001	1.1
2002	1.1
2003	1.1
2004	1.3
2005	1.4
2006	1.4
2007	1.5
2008	1.5
2009	1.3
2010	1.6
2011	1.5
2012	1.5
2013	1.4
2014	1.5
2015	1.5
2016	1.5
2017	1.6
2018	1.5
2019	1.6
2020	1.4
2021	1.6
2022	1.7