Year	%
2000	4.18000937955295
2001	4.11661195831979
2002	3.84383986942576
2003	3.65759044906954
2004	3.52457749846609
2005	3.11151778778477
2006	2.92552914934325
2007	2.44028861765418
2008	2.27020613088181
2009	2.09920929736013
2010	1.77464101598364
2011	1.69159633748795
2012	1.41567446610099
2013	1.3598017000028
2014	1.15017558514773
2015	1.16150196338851
2016	0.980398017692058
2017	0.957754274442858
2018	0.933560870826654
2019	0.761067712175182
2020	0.696312160582492