Quarter	Percent
1986-01-01	8.86654478976234
1986-04-01	8.14742967992240
1986-07-01	7.68854064642507
1986-10-01	7.95880149812734
1987-01-01	8.46660395108184
1987-04-01	7.89980732177264
1987-07-01	6.32591093117409
1987-10-01	8.14634146341464
1988-01-01	9.20275590551181
1988-04-01	10.50442017680710
1988-07-01	10.47261009667020
1988-10-01	10.04709576138150
1989-01-01	13.47708894878710
1989-04-01	12.54924029262800
1989-07-01	12.62975778546710
1989-10-01	13.22978039635780
1990-01-01	13.49920592906300
1990-04-01	12.49335459861780
1990-07-01	13.07439824945300
1990-10-01	14.90947816826410
1991-01-01	17.48400852878460
1991-04-01	16.60210293303820
1991-07-01	17.95872838817620
1991-10-01	16.68484187568160
1992-01-01	19.56882255389720
1992-04-01	15.15679442508710
1992-07-01	15.94802126402840
1992-10-01	16.89983212087300
1993-01-01	17.57610568638710
1993-04-01	16.64656212303980
1993-07-01	14.84794275491950
1993-10-01	16.34285714285710
1994-01-01	17.42551995503090
1994-04-01	15.91448931116390
1994-07-01	13.09241706161140
1994-10-01	12.63579188107490
1995-01-01	13.58096343586770
1995-04-01	11.16361488481980
1995-07-01	11.18266978922720
1995-10-01	12.85318559556790
1996-01-01	12.53545093590470
1996-04-01	11.00757134536980
1996-07-01	11.59420289855070
1996-10-01	10.89402013025460
1997-01-01	14.07322654462240
1997-04-01	11.91740412979350
1997-07-01	14.21715656868630
1997-10-01	13.22170900692840
1998-01-01	15.68396226415090
1998-04-01	13.48724179829890
1998-07-01	12.67779839208410
1998-10-01	13.49502487562190
1999-01-01	13.99874450721910
1999-04-01	13.30671989354620
1999-07-01	12.34323432343230
1999-10-01	12.31929604022630
2000-01-01	14.07828282828280
2000-04-01	12.98955613577020
2000-07-01	10.45576407506700
2000-10-01	11.89290161892900
2001-01-01	13.41070277240490
2001-04-01	10.70528967254410
2001-07-01	11.90006574621960
2001-10-01	11.44945188794150
2002-01-01	12.72509003601440
2002-04-01	11.09101868595540
2002-07-01	11.36789506558400
2002-10-01	11.52685576342790
2003-01-01	12.84023668639050
2003-04-01	10.08039579468150
2003-07-01	8.94357743097239
2003-10-01	10.61997703788750
2004-01-01	11.07246376811590
2004-04-01	12.19663970130680
2004-07-01	9.48275862068966
2004-10-01	9.21125206839492
2005-01-01	11.28654970760230
2005-04-01	9.93417115499701
2005-07-01	9.87868284228770
2005-10-01	9.74945533769063
2006-01-01	11.90476190476190
2006-04-01	10.12373453318340
2006-07-01	9.81595092024540
2006-10-01	9.82996811902232
2007-01-01	11.71548117154810
2007-04-01	10.43382756727070
2007-07-01	9.61968680089486
2007-10-01	7.61501850872554
2008-01-01	10.87562744004460
2008-04-01	9.94912379875636
2008-07-01	9.23165137614679
2008-10-01	12.02967673555910
2009-01-01	14.35782389231630
2009-04-01	17.92943898207060
2009-07-01	15.38461538461540
2009-10-01	17.37907761529810
2010-01-01	17.01291409320610
2010-04-01	16.96009389671360
2010-07-01	16.64726426076830
2010-10-01	16.27516778523490
2011-01-01	16.51583710407240
2011-04-01	14.90866234531530
2011-07-01	13.91044776119400
2011-10-01	14.39263097294190
2012-01-01	16.54432523997740
2012-04-01	15.85014409221900
2012-07-01	15.33451746595620
2012-10-01	18.89994148624930
2013-01-01	15.72904707233070
2013-04-01	15.38461538461540
2013-07-01	15.29271206690560
2013-10-01	15.25235718247370
2014-01-01	15.56786703601110
2014-04-01	14.42585112521640
2014-07-01	14.08533021624780
2014-10-01	14.19784725781650
2015-01-01	14.44270015698590
2015-04-01	14.23180592991910
2015-07-01	14.04185022026430
2015-10-01	11.99154780771260
2016-01-01	14.45352400408580
2016-04-01	13.02475780409040
2016-07-01	12.06521739130430
2016-10-01	13.95121951219510
2017-01-01	14.32835820895520
2017-04-01	11.78361006963040
2017-07-01	13.31632653061220
2017-10-01	12.66540642722120
2018-01-01	12.12121212121210
2018-04-01	10.91549295774650
2018-07-01	8.06132542037586