Year	%
2004	16.52
2005	15.696
2006	17.23
2007	18.046
2008	19.423
2009	20.065
2010	18.763
2011	18.662
2012	14.346
2013	16.572
2014	15.504
2015	14.483
2016	16.732
2017	17.265
2018	16.342
2019	17.523
2020	19.279
2021	20.655
2022	19.645