Quarter	Percent
1968-01-01	1.220667068510460
1968-04-01	0.787698044854146
1968-07-01	0.836078985452630
1968-10-01	0.675082146475581
1969-01-01	1.053672143745770
1969-04-01	0.824024725223111
1969-07-01	0.762599532612125
1969-10-01	0.715986143262900
1970-01-01	0.878604264330936
1970-04-01	0.771315991744906
1970-07-01	0.692409822357544
1970-10-01	0.722774642462946
1971-01-01	0.973072937400632
1971-04-01	0.859557368039625
1971-07-01	0.814369281750760
1971-10-01	0.918367262319755
1972-01-01	1.306033660621300
1972-04-01	1.056424433911230
1972-07-01	0.882794614756569
1972-10-01	0.755525661645144
1973-01-01	1.059736459185590
1973-04-01	0.877578620352040
1973-07-01	0.888248894562218
1973-10-01	0.845877516523943
1974-01-01	1.268557641361130
1974-04-01	0.800488334004545
1974-07-01	1.054100272146110
1974-10-01	1.307382161988290
1975-01-01	1.813269471195050
1975-04-01	1.507687635055320
1975-07-01	1.349888706023550
1975-10-01	1.413189902798180
1976-01-01	1.737966662954280
1976-04-01	1.394180074379620
1976-07-01	1.389299227459610
1976-10-01	1.242337430846890
1977-01-01	1.702796273524260
1977-04-01	1.519635771663690
1977-07-01	1.528786157332650
1977-10-01	1.614892813131060
1978-01-01	2.013894776248600
1978-04-01	1.781234244367400
1978-07-01	1.714328736253200
1978-10-01	1.579238837771550
1979-01-01	1.912246230865890
1979-04-01	1.699718304816940
1979-07-01	1.678705718397230
1979-10-01	1.642157503919470
1980-01-01	1.803415979416450
1980-04-01	1.720879561537340
1980-07-01	1.789541777560170
1980-10-01	1.724692697969670
1981-01-01	2.036029397437180
1981-04-01	1.951694727930730
1981-07-01	1.668892173283060
1981-10-01	1.704651341371540
1982-01-01	1.893246248089660
1982-04-01	1.992895160147600
1982-07-01	1.884294942016310
1982-10-01	1.968011758989240
1983-01-01	2.502175805047870
1983-04-01	2.288455628905560
1983-07-01	2.330594618479880
1983-10-01	2.180394838462970
1984-01-01	2.637089197575880
1984-04-01	2.395517078017040
1984-07-01	2.244858603507410
1984-10-01	2.231208000402110
1985-01-01	2.448832401702130
1985-04-01	2.328744997724390
1985-07-01	2.185162305247070
1985-10-01	2.201411086042970
1986-01-01	2.563836175261090
1986-04-01	2.414223242746610
1986-07-01	2.398994504357500
1986-10-01	2.258068820405610
1987-01-01	2.738325774519440
1987-04-01	2.649600912358950
1987-07-01	2.116282452150660
1987-10-01	2.194620159628540
1988-01-01	2.449978910681180
1988-04-01	2.074973142864520
1988-07-01	2.202145302724690
1988-10-01	2.122384666877900
1989-01-01	2.279170055607360
1989-04-01	1.958295566521520
1989-07-01	1.815862074643620
1989-10-01	1.831546061254990
1990-01-01	1.954559458143380
1990-04-01	1.884569816318680
1990-07-01	1.779589788508120
1990-10-01	1.724442331154540
1991-01-01	1.791414541457940
1991-04-01	1.943706858715700
1991-07-01	1.848286741070170
1991-10-01	1.822552821714720
1992-01-01	1.984294729687520
1992-04-01	1.753681557301540
1992-07-01	1.854994251063300
1992-10-01	1.972770974740630
1993-01-01	2.185188070138500
1993-04-01	2.011165920194360
1993-07-01	2.114938080877830
1993-10-01	2.328987289349240
1994-01-01	2.691322368166530
1994-04-01	2.344162540868130
1994-07-01	2.505730074940340
1994-10-01	2.484387464996230
1995-01-01	2.659976125082550
1995-04-01	2.653830476208520
1995-07-01	2.693708638967820
1995-10-01	2.800912961033640
1996-01-01	2.830382685321170
1996-04-01	2.813391429176910
1996-07-01	2.757580152216170
1996-10-01	2.771485402594010
1997-01-01	2.915432608620160
1997-04-01	3.010830921222460
1997-07-01	2.844665483390830
1997-10-01	2.861588741641860
1998-01-01	3.044248226068550
1998-04-01	3.517395793402790
1998-07-01	3.676250896701520
1998-10-01	3.627431202437800
1999-01-01	3.998930853576010
1999-04-01	3.958613250660400
1999-07-01	3.988125074560620
1999-10-01	3.644913163040300
2000-01-01	4.097487861595940
2000-04-01	4.187692261448100
2000-07-01	3.893708986871320
2000-10-01	3.650663525817970
2001-01-01	4.066431055899070
2001-04-01	4.147400205170050
2001-07-01	4.324061146785640
2001-10-01	4.220511422828150
2002-01-01	4.756002867247730
2002-04-01	4.707714265081510
2002-07-01	4.565472783898690
2002-10-01	4.388834189746610
2003-01-01	4.649195877881090
2003-04-01	4.552744366730660
2003-07-01	4.379506192403840
2003-10-01	4.177497690043170
2004-01-01	4.127213518696390
2004-04-01	4.071059281517170
2004-07-01	3.944848739988260
2004-10-01	3.642710561725300
2005-01-01	3.944757626567560
2005-04-01	3.771894077497880
2005-07-01	3.768738231597220
2005-10-01	3.774983971737050
2006-01-01	3.545263054343310
2006-04-01	3.559978934286650
2006-07-01	3.506084795414500
2006-10-01	3.275419494087220
2007-01-01	3.495752464878220
2007-04-01	3.301593163170410
2007-07-01	3.216675392550080
2007-10-01	3.236761830461910
2008-01-01	3.484453057608030
2008-04-01	3.617078465722410
2008-07-01	3.586011329722930
2008-10-01	3.406730191448730
2009-01-01	4.032305835497200
2009-04-01	4.427443856120500
2009-07-01	4.719409289047230
2009-10-01	4.416715324039020
2010-01-01	4.190828208256150
2010-04-01	4.364048497190710
2010-07-01	4.223225395720580
2010-10-01	3.959626101256810
2011-01-01	3.896043998482040
2011-04-01	4.125652808241950
2011-07-01	3.858281360314460
2011-10-01	3.532268229547600
2012-01-01	3.755224853256180
2012-04-01	3.929627373502550
2012-07-01	3.626837021723450
2012-10-01	3.456131889725030
2013-01-01	3.461948050202910
2013-04-01	3.682020372077010
2013-07-01	3.379707474459380
2013-10-01	3.264062366500010
2014-01-01	3.175012493943400
2014-04-01	3.436626099462200
2014-07-01	3.224545724925270
2014-10-01	2.844514342262740
2015-01-01	2.897382727583150
2015-04-01	3.093902594597640
2015-07-01	2.995669217235470
2015-10-01	2.634274891534650
2016-01-01	2.617913822415740
2016-04-01	2.957857554173030
2016-07-01	2.616706579345870
2016-10-01	2.473078139677550
2017-01-01	2.464373358622670
2017-04-01	2.681126237028740
2017-07-01	2.403658499647130
2017-10-01	2.303226886922760
2018-01-01	2.127650984776170
2018-04-01	2.173328356354680
2018-07-01	2.152578603131530