Year	Percent
2005-01-01	3.18056941061841
2006-01-01	2.80187301559277
2007-01-01	2.58736960414750
2008-01-01	3.00595419329544
2009-01-01	3.43240607653890
2010-01-01	3.41742791429779
2011-01-01	3.22663382078022
2012-01-01	2.97233450008979
2013-01-01	2.60711098946566
2014-01-01	2.66093741044955
2015-01-01	2.64000360944291
2016-01-01	2.71032868633390
2017-01-01	2.82456374877187