Year	%
2000	0.433365783382225
2001	0.363276025843569
2002	0.409141946809213
2003	0.427217976831291
2004	0.548024162191506
2005	0.521210663765375
2006	0.494052712135354
2007	0.523248386902897
2008	0.522998007185564
2009	0.554074578863212
2010	0.546228149901689
2011	0.491044914408992
2012	0.421245442119432
2013	0.390556688516766
2014	0.368454541204035
2015	0.370055444203699
2016	0.292477670317941
2017	0.352663580600295
2018	0.332483460090966
2019	0.314757046469472
2020	0.33782697722692