Year	%
2000	37.107024588223744
2001	36.77269759479981
2002	36.41821866799371
2003	36.088891107156805
2004	35.718871941430514
2005	35.36234500786527
2006	35.003674461767964
2007	34.665852629144624
2008	34.310297446453
2009	34.033827573145665
2010	33.810811225050465
2011	33.66692747639122
2012	33.568241359082464
2013	33.507139269590915
2014	33.462622032242166
2015	33.45564096734366
2016	33.45613004297397
2017	33.45780632780113
2018	33.45734878681722
2019	33.45478367708669