Year	%
1990	9.7
1992	8.5
1997	6.4
1999	5.7
2000	5.3
2001	6.5
2002	6.1
2004	7.2
2005	6.1
2006	6.5
2007	6.8
2008	8
2009	8.5
2011	9.2
2012	9
2013	8.8
2014	8.8
2015	9
2016	9.3
2017	9.4
2018	10
2019	10.3
2020	9.8
2021	10.4