Year	Percent
2005-01-01	59.3447712208398
2006-01-01	60.2756203654150
2007-01-01	60.8094320538834
2008-01-01	62.2699109135486
2009-01-01	62.2920368023305
2010-01-01	64.7781610917480
2011-01-01	66.1881850271057
2012-01-01	66.2694404861418
2013-01-01	66.4376080772997
2014-01-01	66.6275991320306
2015-01-01	66.7565527556520
2016-01-01	66.7781396070383
2017-01-01	67.4032017771491