Year	%
2006	22.1
2007	22.6
2008	22.5
2009	23.8
2010	22.7
2011	23.2
2012	23.4
2013	23.2
2014	23.3
2015	23.6
2016	23.1
2017	23.3
2018	22.9
2019	24.8
2020	25.1