Quarter	Percent
2005-01-01	16.4281497081609
2005-04-01	16.8348940627054
2005-07-01	15.9676424471697
2005-10-01	16.1711225210914
2006-01-01	16.2151158509266
2006-04-01	15.8054310935714
2006-07-01	15.4488463696010
2006-10-01	15.7049794211834
2007-01-01	16.4374541297854
2007-04-01	16.3457433421252
2007-07-01	16.2966343883375
2007-10-01	15.7293666038631
2008-01-01	16.5839637004631
2008-04-01	16.4424283229406
2008-07-01	16.0624777797096
2008-10-01	17.1751177839903
2009-01-01	17.5910881486907
2009-04-01	17.6892489885171
2009-07-01	17.0897769311116
2009-10-01	16.9065504086665
2010-01-01	17.9626110154950
2010-04-01	17.0612157307949
2010-07-01	17.1750983896312
2010-10-01	18.0096165591059
2011-01-01	18.3106522788357
2011-04-01	17.7424642476036
2011-07-01	17.2857134365809
2011-10-01	17.2146683615246
2012-01-01	17.9734213316608
2012-04-01	17.0152989159647
2012-07-01	16.5253875676956
2012-10-01	17.6058691470192
2013-01-01	18.2596458158779
2013-04-01	17.4729890356608
2013-07-01	17.3322527836934
2013-10-01	17.1854511896294
2014-01-01	17.9682519425976
2014-04-01	17.8954117791662
2014-07-01	17.3409214952405
2014-10-01	17.9754108782164
2015-01-01	18.4002621183656
2015-04-01	18.1637572424559
2015-07-01	17.8847491500403
2015-10-01	17.7024246834525
2016-01-01	18.7015243969340
2016-04-01	18.3042885228163
2016-07-01	17.6363799965037
2016-10-01	17.9780530316796
2017-01-01	18.4533770142819
2017-04-01	18.2159416293962
2017-07-01	17.9780528258097
2017-10-01	18.2390817541247
2018-01-01	18.6064382995906
2018-04-01	18.2335371816088