Year	Percent
2005-01-01	6.84038951421201
2006-01-01	6.68906645197786
2007-01-01	6.01432515408023
2008-01-01	6.55118974743593
2009-01-01	8.50142819064530
2010-01-01	7.12756803876668
2011-01-01	6.00360500280883
2012-01-01	5.49724371048925
2013-01-01	5.05724435798511
2014-01-01	5.51860795544455
2015-01-01	5.66082031678982
2016-01-01	6.02972206440421
2017-01-01	6.26538658519595