Year	%
2000	24.235658879525424
2001	23.94704346907102
2002	23.833748738451817
2003	23.625826485003568
2004	23.187154400460038
2005	22.883530910753738
2006	22.50031540958012
2007	22.231070019275077
2008	22.070697266961858
2009	21.837648079458685
2010	21.733423871686668
2011	21.51806660269178
2012	21.252130553220965
2013	20.731249954525254
2014	20.36637733062669
2015	20.33795544105156
2016	20.21694665628107
2017	19.914170850677316
2018	19.718429296067587
2019	19.584589406552528