Year	%
2003	6.1
2004	7.1
2005	7.4
2006	7.5
2007	8
2008	7.8
2009	7.7
2010	7.2
2011	7.3
2012	7.3
2013	6.8
2014	7
2015	7.5
2016	7.8
2017	8.1
2018	8.1
2019	8.1
2020	8.1
2021	8.1