Year	%
2003	11.9
2004	12.8
2005	12.7
2006	12.6
2007	13
2008	13
2009	13.2
2010	13.3
2011	13
2012	12.9
2013	12.2
2014	12.3
2015	12.5
2016	12.7
2017	12.8
2018	12.8
2019	12.9
2020	13
2021	12.3