Year	%
2000	21.743159022380535
2001	21.529788643973212
2002	21.4130155706262
2003	21.314741247242303
2004	20.984318652999942
2005	20.610352288854507
2006	20.3549076073145
2007	20.075117284041735
2008	19.784300192206885
2009	19.561903185440944
2010	19.208562238276187
2011	18.813258633723795
2012	18.65390796226612
2013	18.425116872220734
2014	18.181436667436877
2015	17.94965479674518
2016	17.77520607204884
2017	17.583939091269066
2018	17.440627291912634
2019	17.316521559446862