Year	%
2004	11.2
2005	11.7
2006	12.1
2007	12.3
2008	12.4
2009	12.4
2010	12.5
2011	12.4
2012	12.5
2013	12.4
2014	12.6
2015	12.8
2016	13
2017	13.4
2018	13.3
2019	13.7
2020	13.8
2021	13.8