Year	%
1994	9.2
1995	9.7
1996	8.5
1997	9.2
1998	8.7
1999	8
2000	8
2003	8.8
2004	8.5
2005	7.9
2006	8.1
2007	10
2008	10.4
2009	11.3
2010	10.4
2011	10.1
2012	10.7
2013	9.6
2014	10.5
2015	11.3
2016	10.7
2017	10.7
2018	10.2
2019	10.5
2020	11
2021	11.5