Year	%
2000	27.802653494748103
2001	27.447171875839864
2002	27.262067096973674
2003	27.12025613968026
2004	27.18601828486808
2005	26.662596836170028
2006	25.82255716147259
2007	25.392444509145324
2008	25.262474940323067
2009	25.135038553350856
2010	25.03685869455264
2011	24.891629798735714
2012	24.68296566097695
2013	24.290733796425123
2014	23.765313984040315
2015	23.514970066539757
2016	23.291898559821192
2017	22.80889019560002
2018	22.49088678082805
2019	22.322391114745596