Year	%
1985	6
1988	6.7
1992	7
1995	8.4
1997	8
2000	7
2003	9.3
2004	9.1
2005	8.5
2006	9.1
2007	9.1
2008	8.8
2009	9.4
2010	9.6
2011	10.2
2012	9.1
2013	10.1
2014	9.7
2015	10.5
2016	10.2
2017	9.9
2018	9.6
2019	8.6
2020	7.9
2021	8.1