Year	%
2000	21.74082984957273
2001	21.115267489993613
2002	20.72685129564589
2003	20.349111170780635
2004	19.726961925040424
2005	19.434007021764923
2006	18.81755462787609
2007	18.523740958477706
2008	18.15550559667228
2009	17.714353041270773
2010	17.322264009475425
2011	16.9397768523372
2012	16.625426979130893
2013	16.30298913974514
2014	16.025329606771834
2015	15.926762691926735
2016	15.830829113442013
2017	15.511844595125885
2018	15.366475236988455
2019	15.111134909585184