Year	%
1992	11.6
1993	7.7
1995	15.3
1996	12.3
2002	7.7
2003	6.8
2004	8.5
2005	8
2006	7.8
2007	6.3
2008	6
2009	5.1
2010	4.4
2011	4.6
2012	4.2
2013	4.6
2014	4.2
2015	5
2016	5.2
2017	5.9
2018	5
2019	6.1
2020	5.1