Quarter	Percent
2005-01-01	91.7216707210876
2005-04-01	92.0982241602022
2005-07-01	92.1232852977867
2005-10-01	92.0307480763569
2006-01-01	91.7845498312819
2006-04-01	92.1825604161839
2006-07-01	92.1600517697580
2006-10-01	92.1718594514709
2007-01-01	91.9146032213976
2007-04-01	92.2490433029670
2007-07-01	92.1799397083134
2007-10-01	92.1279010527918
2008-01-01	91.8456926625970
2008-04-01	92.1954680707869
2008-07-01	92.1593554235288
2008-10-01	92.0015113149184
2009-01-01	91.6363023951744
2009-04-01	91.7835444891017
2009-07-01	91.6844186579154
2009-10-01	91.5738118203854
2010-01-01	91.4249432883677
2010-04-01	91.7553183760380
2010-07-01	91.5586654131664
2010-10-01	91.3996344382923
2011-01-01	91.2554730669424
2011-04-01	91.5845160291254
2011-07-01	91.4285425210293
2011-10-01	91.3877352890075
2012-01-01	91.2150339590426
2012-04-01	91.5808791135194
2012-07-01	91.4920447916984
2012-10-01	91.4231788666694
2013-01-01	91.0846415122996
2013-04-01	91.4966672131841
2013-07-01	91.2810484942051
2013-10-01	91.2701261059337
2014-01-01	91.0819459572453
2014-04-01	91.2854649806469
2014-07-01	91.2864334076740
2014-10-01	91.2417880058168
2015-01-01	91.1511915557260
2015-04-01	91.3308660359654
2015-07-01	91.2573401868928
2015-10-01	91.2702416468135
2016-01-01	91.1884019763646
2016-04-01	91.4358491534825
2016-07-01	91.4017106041917
2016-10-01	91.3327421456346
2017-01-01	91.2608802880648
2017-04-01	91.4754960302206
2017-07-01	91.4648855576646
2017-10-01	91.4078761122026
2018-01-01	91.3903065925932
2018-04-01	91.6403373014140