Quarter	Percent
1999-07-01	63.6687353574329
1999-10-01	63.9069477634558
2000-01-01	61.8347073971733
2000-04-01	63.6642220102270
2000-07-01	63.0714473271595
2000-10-01	63.4809894023226
2001-01-01	61.4066041032907
2001-04-01	61.9334733365930
2001-07-01	61.3801010005699
2001-10-01	61.4232738737758
2002-01-01	59.2556208768148
2002-04-01	60.5507880483543
2002-07-01	60.7889843612315
2002-10-01	61.7613212541346
2003-01-01	59.3986932894674
2003-04-01	61.0009858211020
2003-07-01	59.9687015268797
2003-10-01	61.3045657638710
2004-01-01	59.2681041804264
2004-04-01	59.9376548123077
2004-07-01	59.4966637221408
2004-10-01	60.6716713616675
2005-01-01	59.5044830143562
2005-04-01	60.3975131234594
2005-07-01	60.5008896242056
2005-10-01	62.7589058873558
2006-01-01	62.3801478965609
2006-04-01	63.7955879323934
2006-07-01	64.1716283863287
2006-10-01	66.0184716000446
2007-01-01	65.2468017780252
2007-04-01	66.8933325793215
2007-07-01	66.8830158187197
2007-10-01	68.3371227782427
2008-01-01	67.5601533860960
2008-04-01	68.0018928609048
2008-07-01	69.0873813403850
2008-10-01	71.4346241756714
2009-01-01	70.6037930179602
2009-04-01	70.0255038327406
2009-07-01	69.4641166636425
2009-10-01	71.4483499092954
2010-01-01	69.2712895620033
2010-04-01	69.3327405708399
2010-07-01	69.4506786202306
2010-10-01	71.3904532744568
2011-01-01	69.6877036335634
2011-04-01	70.4199108253634
2011-07-01	69.6717229068928
2011-10-01	71.0863774962062
2012-01-01	69.6692756489453
2012-04-01	68.3638306110824
2012-07-01	68.8214603583895
2012-10-01	70.2118806062460
2013-01-01	69.5793360785620
2013-04-01	69.7131127807293
2013-07-01	69.3874591926878
2013-10-01	69.9522756478349
2014-01-01	68.0652650193646
2014-04-01	67.8958383734403
2014-07-01	66.8146208087276
2014-10-01	68.0340568365164
2015-01-01	66.5488882431993
2015-04-01	65.9347369615216
2015-07-01	65.6888042341256
2015-10-01	66.6676659160129
2016-01-01	65.5460079452357
2016-04-01	65.6219533648032
2016-07-01	65.1543130355390
2016-10-01	66.5806617079159
2017-01-01	65.3868844437394
2017-04-01	64.8308994742443
2017-07-01	65.3523953968212
2017-10-01	67.4363771619660
2018-01-01	65.9806149923080
2018-04-01	65.9480476266270
2018-07-01	65.8933753467612