Year	%
1979	1.5
1989	0
1991	0.1
1995	0.1
1997	0.3
1998	0.2
1999	0.3
2000	0.5
2001	0.5
2002	0.8
2003	0.7
2004	0.8
2005	0.8
2006	0.7
2007	1
2008	1
2009	1.2
2010	1.1
2011	1.1
2012	1
2013	1.1
2014	1
2015	1.1
2016	1.1
2017	1.1
2018	1.2
2019	1.2
2021	1.2
2023	1.2