Quarter	Percent
2005-01-01	50.1114788692588
2005-04-01	49.4526912010982
2005-07-01	49.5630376161101
2005-10-01	50.2460931467542
2006-01-01	50.7023623220806
2006-04-01	49.6497547602272
2006-07-01	49.6904064681290
2006-10-01	50.5841886099204
2007-01-01	50.9294569921831
2007-04-01	50.3035849640626
2007-07-01	49.8807007221897
2007-10-01	50.8009094491769
2008-01-01	51.3058214318978
2008-04-01	50.5526617123428
2008-07-01	50.6909580249469
2008-10-01	50.9029728077959
2009-01-01	50.1176560772604
2009-04-01	48.9020531839645
2009-07-01	49.0437767687656
2009-10-01	49.5378394060602
2010-01-01	50.6395603326686
2010-04-01	51.1430092893912
2010-07-01	51.9119515270582
2010-10-01	52.4917596878868
2011-01-01	53.0407460915936
2011-04-01	52.9387368726891
2011-07-01	52.7064292007375
2011-10-01	52.8420029553941
2012-01-01	53.3780815230657
2012-04-01	52.7204028933164
2012-07-01	52.5608319676225
2012-10-01	53.0711953872554
2013-01-01	53.2636019692100
2013-04-01	52.9977923271452
2013-07-01	52.9482455794319
2013-10-01	53.5047897554698
2014-01-01	53.2321474391638
2014-04-01	52.6933685197967
2014-07-01	52.1158812851781
2014-10-01	53.3085097063489
2015-01-01	53.5737835060954
2015-04-01	52.9408800525070
2015-07-01	52.9788085596583
2015-10-01	53.1105113014144
2016-01-01	53.5197674738638
2016-04-01	52.7001372406662
2016-07-01	52.8163508733717
2016-10-01	53.1021951971035
2017-01-01	53.5145410766355
2017-04-01	52.9393595727868
2017-07-01	52.7923241659839
2017-10-01	53.3145450846344
2018-01-01	53.1534245767434
2018-04-01	52.9956790614473
2018-07-01	52.3245615502741