Quarter	Percent
1999-07-01	28.9273476703695
1999-10-01	27.9468940254154
2000-01-01	28.8794187470134
2000-04-01	27.3546031127681
2000-07-01	29.1159479408483
2000-10-01	28.5144074685562
2001-01-01	28.4215821221669
2001-04-01	27.7975945078259
2001-07-01	28.2751929846631
2001-10-01	27.4434967503001
2002-01-01	29.6603508074377
2002-04-01	28.5757177569018
2002-07-01	28.9907518810534
2002-10-01	27.9172300752594
2003-01-01	28.3782274159881
2003-04-01	27.2536721244217
2003-07-01	28.9053306494628
2003-10-01	29.4740059433437
2004-01-01	29.9159912614534
2004-04-01	28.5452397175196
2004-07-01	28.9949414152716
2004-10-01	29.7691356539750
2005-01-01	28.8903036202764
2005-04-01	27.0166644211800
2005-07-01	27.4910137234606
2005-10-01	25.8896020629655
2006-01-01	26.5196380312388
2006-04-01	25.0360318765569
2006-07-01	25.5102012662766
2006-10-01	23.9967465067037
2007-01-01	24.8976739343914
2007-04-01	23.7372250627602
2007-07-01	24.4088265156524
2007-10-01	22.8404876407484
2008-01-01	21.9162801250647
2008-04-01	21.6041227798870
2008-07-01	21.6994876525458
2008-10-01	19.1405693864157
2009-01-01	19.2210084310842
2009-04-01	20.2032051953335
2009-07-01	21.5402200347834
2009-10-01	19.7384147796206
2010-01-01	20.0616069149014
2010-04-01	19.4206834089534
2010-07-01	20.3965256675380
2010-10-01	19.9340367129676
2011-01-01	21.2199262037973
2011-04-01	20.6168525211321
2011-07-01	21.2518659727082
2011-10-01	20.8109775744254
2012-01-01	22.1049391183944
2012-04-01	21.6538064152045
2012-07-01	22.6947963163331
2012-10-01	21.2157212946576
2013-01-01	21.6856109893980
2013-04-01	21.5540512362448
2013-07-01	23.0569020051947
2013-10-01	22.6668320007077
2014-01-01	24.7611857347559
2014-04-01	23.2770140272939
2014-07-01	25.5873864155752
2014-10-01	23.9691810788136
2015-01-01	25.9514820164466
2015-04-01	25.9392454895883
2015-07-01	25.9845744104488
2015-10-01	25.0446811922949
2016-01-01	25.5637302270560
2016-04-01	26.0799881206899
2016-07-01	26.6024579881373
2016-10-01	24.8871043393784
2017-01-01	25.5231297856988
2017-04-01	27.0015786425440
2017-07-01	26.8220096449271
2017-10-01	24.8697656992753
2018-01-01	25.2576883351179
2018-04-01	23.8665349007151
2018-07-01	24.6248313117500