Year	Percent
2005-01-01	2.62990503219570
2006-01-01	2.63485346025855
2007-01-01	2.73696634980930
2008-01-01	2.93098406258812
2009-01-01	4.22610921815812
2010-01-01	4.19939329858518
2011-01-01	4.03762546344851
2012-01-01	3.82261996294664
2013-01-01	3.85047516129476
2014-01-01	3.75653595015107
2015-01-01	3.39740354512502
2016-01-01	3.06158118504600
2017-01-01	2.69376092921637