Year	%
2004	18.2
2005	18.2
2006	18.2
2007	18.2
2008	18.3
2009	18.2
2010	18.2
2011	18.2
2012	18.2
2013	18.1
2014	18.1
2015	18.2
2016	18.3
2017	18.3
2018	18.1
2019	18.2
2020	18.2
2021	18.1