Quarter	Percent
2005-01-01	50.8701529595319
2005-04-01	51.7258718955834
2005-07-01	51.9670383210733
2005-10-01	52.0345160928938
2006-01-01	51.8510616781416
2006-04-01	52.7815219182501
2006-07-01	52.9852769591588
2006-10-01	53.0995803080299
2007-01-01	52.7563659579734
2007-04-01	53.6316365888561
2007-07-01	53.6723096701272
2007-10-01	53.8097946766612
2008-01-01	53.5492113641934
2008-04-01	54.3068339634306
2008-07-01	54.0054890321558
2008-10-01	54.0554261860080
2009-01-01	53.4982246986360
2009-04-01	53.9375442450526
2009-07-01	53.6398506721588
2009-10-01	53.6624819620638
2010-01-01	53.4863699462014
2010-04-01	54.1563323255179
2010-07-01	54.1146237640820
2010-10-01	53.9696154810397
2011-01-01	53.9031520912826
2011-04-01	54.6953011902934
2011-07-01	54.6652601851103
2011-10-01	54.9118327786325
2012-01-01	54.6657073177682
2012-04-01	55.5194338574040
2012-07-01	55.6436325395313
2012-10-01	55.9803458999676
2013-01-01	55.6047138528003
2013-04-01	56.3451821952867
2013-07-01	56.5332982411959
2013-10-01	56.7727757860473
2014-01-01	56.5058771010150
2014-04-01	57.3895816936388
2014-07-01	57.5371378926080
2014-10-01	57.7957915693781
2015-01-01	57.4348001793704
2015-04-01	58.1636094057261
2015-07-01	58.3181512614408
2015-10-01	58.6421665987222
2016-01-01	58.5273599195454
2016-04-01	59.2704911341076
2016-07-01	59.3713004851540
2016-10-01	59.6973242533685
2017-01-01	59.5946582726024
2017-04-01	60.4198812947595
2017-07-01	60.6343299081042
2017-10-01	60.9458715383886
2018-01-01	60.6589218018012
2018-04-01	61.4022202576454