Year	%
2000	0.519085316852717
2001	0.469074777292355
2002	0.424112382530632
2003	0.429295798182361
2004	0.428841506027156
2005	0.433052151390052
2006	0.433016970009624
2007	0.435284847275092
2008	0.384017145610863
2009	0.390809716891216
2010	0.413657490114891
2011	0.422641824336303
2012	0.384868053244202
2013	0.386080210910621
2014	0.410432107956851
2015	0.408140519360409
2016	0.418599123345422
2017	0.418996603852288
2018	0.429077635863797
2019	0.380503052130559
2020	0.387303761189798