Quarter	Percent
1999-07-01	17.23414745781560
1999-10-01	13.83208158736760
2000-01-01	15.34077223010260
2000-04-01	13.17998210786830
2000-07-01	12.85006205917760
2000-10-01	12.39650908027710
2001-01-01	15.87756133322080
2001-04-01	11.10248456740900
2001-07-01	11.04479003491140
2001-10-01	12.34509572129560
2002-01-01	12.53683402487130
2002-04-01	9.26534878564827
2002-07-01	9.65723965173040
2002-10-01	9.07587411171974
2003-01-01	12.04962214494510
2003-04-01	11.01554590656500
2003-07-01	11.08929779423930
2003-10-01	12.76108741219480
2004-01-01	13.10395258346960
2004-04-01	11.80226964495840
2004-07-01	11.23769049311450
2004-10-01	11.86689996914000
2005-01-01	13.46333526803940
2005-04-01	11.19870410309560
2005-07-01	11.77018547847420
2005-10-01	11.83609686886370
2006-01-01	14.12402760030930
2006-04-01	10.53253774521910
2006-07-01	10.37047492632490
2006-10-01	12.16602719756020
2007-01-01	11.83395263368670
2007-04-01	11.03244906283930
2007-07-01	11.70200221933730
2007-10-01	9.84454048274090
2008-01-01	11.51132048286910
2008-04-01	10.60396885263100
2008-07-01	11.97127647608940
2008-10-01	11.65225033742570
2009-01-01	13.92365631546780
2009-04-01	12.20205945213570
2009-07-01	11.11436743488390
2009-10-01	10.50280491331250
2010-01-01	13.62180142679320
2010-04-01	11.76364850386220
2010-07-01	10.18293796709800
2010-10-01	8.77236287618839
2011-01-01	13.32213286710590
2011-04-01	11.76936249427400
2011-07-01	11.72098682210710
2011-10-01	10.91928646469160
2012-01-01	9.82006084897950
2012-04-01	9.92565658049391
2012-07-01	9.66091086644004
2012-10-01	9.35104863211030
2013-01-01	10.44448536523800
2013-04-01	9.07750539364774
2013-07-01	10.38089637691760
2013-10-01	9.03295090260756
2014-01-01	12.73517040184050
2014-04-01	11.29325108751560
2014-07-01	11.02461179500210
2014-10-01	9.54381297869973
2015-01-01	13.39061247526590
2015-04-01	11.95982854541120
2015-07-01	10.31466001501370
2015-10-01	9.46890809737578
2016-01-01	13.13101316556760
2016-04-01	11.02648160990230
2016-07-01	11.13500768906400
2016-10-01	8.54642092990328
2017-01-01	11.31219157983850
2017-04-01	11.80640408850100
2017-07-01	10.55161656122690
2017-10-01	11.21524998048110
2018-01-01	12.45203544065440
2018-04-01	9.98223266735171
2018-07-01	11.34592396898930