Quarter	Percent
2005-01-01	58.4969696969697
2005-04-01	57.7355625848022
2005-07-01	59.3544156350035
2005-10-01	58.7904406890706
2006-01-01	58.1509200004909
2006-04-01	59.3050923126135
2006-07-01	59.4465246671277
2006-10-01	58.8969634309403
2007-01-01	57.5045025122527
2007-04-01	57.9917188699954
2007-07-01	58.3760581779786
2007-10-01	60.1560989700801
2008-01-01	57.4773250666363
2008-04-01	58.2123315012559
2008-07-01	58.9806337791922
2008-10-01	56.5709648891054
2009-01-01	54.2622942467571
2009-04-01	54.1478331952239
2009-07-01	54.9682163913837
2009-10-01	56.8544152406499
2010-01-01	54.6055385806050
2010-04-01	56.1611510429100
2010-07-01	56.3442889596504
2010-10-01	54.8907846959562
2011-01-01	53.7661545897951
2011-04-01	54.6101363673282
2011-07-01	55.3110689102198
2011-10-01	56.6191108968033
2012-01-01	54.0413090998618
2012-04-01	55.6433964022914
2012-07-01	56.6699865832089
2012-10-01	55.2599130154013
2013-01-01	53.3690522447657
2013-04-01	54.7842801959734
2013-07-01	55.1641191769800
2013-10-01	55.0095257581429
2014-01-01	53.5509901058602
2014-04-01	53.3349011158367
2014-07-01	54.5028994775551
2014-10-01	53.4785634814593
2015-01-01	52.3163759454813
2015-04-01	52.7239200681609
2015-07-01	53.9775600112968
2015-10-01	54.5828058852129
2016-01-01	51.8037353887085
2016-04-01	52.4652095800319
2016-07-01	54.9181978768492
2016-10-01	53.3522203749117
2017-01-01	52.4688445617538
2017-04-01	53.0906723613519
2017-07-01	53.5346881494793
2017-10-01	53.5132415455919
2018-01-01	51.6640592782121
2018-04-01	52.4697336650339