Year	%
2000	25.37631078717366
2001	25.261208845517448
2002	25.105037784662713
2003	24.708765782614755
2004	23.91331489498534
2005	23.925721757996648
2006	24.083766565670178
2007	24.14420871220118
2008	24.147166646438624
2009	23.987692509228456
2010	24.13567034552168
2011	24.062273476591365
2012	23.904633368026207
2013	23.252106992229308
2014	22.78352090862645
2015	23.055012920523527
2016	22.934315603188303
2017	22.595912074578365
2018	22.43149185802328
2019	22.284401311293138