Year	%
2000	1.24386016991276
2001	1.05784522959781
2002	1.02664865747485
2003	1.0196261488598
2004	0.876672447223023
2005	0.857134058898601
2006	0.814660400148283
2007	0.819500476347731
2008	0.787534513857745
2009	0.635395257509958
2010	0.626477165462256
2011	0.606703385167091
2012	0.609206212050108
2013	0.595423080083743
2014	0.501270684545066
2015	0.505955510878601
2016	0.494279537022706
2017	0.504201143826901
2018	0.526694779263617
2019	0.5399460680929
2020	0.438285855372626