Quarter	Percent
1968-01-01	1.335123330739220
1968-04-01	0.903309010711279
1968-07-01	0.994590020382699
1968-10-01	0.709664494745796
1969-01-01	1.149177240190680
1969-04-01	0.953324980200874
1969-07-01	0.908176744467867
1969-10-01	0.784368762515211
1970-01-01	0.913049487604508
1970-04-01	0.864721367384859
1970-07-01	0.770304744269513
1970-10-01	0.767025240138646
1971-01-01	1.026861040926840
1971-04-01	0.978971829774841
1971-07-01	0.979364047031674
1971-10-01	1.016999698476320
1972-01-01	1.342203871354170
1972-04-01	0.997437953390168
1972-07-01	0.950238317195382
1972-10-01	0.862811710782596
1973-01-01	1.119610512944080
1973-04-01	0.968368014645159
1973-07-01	1.064437179227360
1973-10-01	0.883840118949914
1974-01-01	1.424219333713210
1974-04-01	0.877805877175339
1974-07-01	1.140476664831870
1974-10-01	1.486182900198190
1975-01-01	1.867637029013190
1975-04-01	1.599620353864910
1975-07-01	1.487174832704660
1975-10-01	1.489633121225740
1976-01-01	1.940554024867270
1976-04-01	1.445650192742290
1976-07-01	1.496601758203020
1976-10-01	1.394175717991130
1977-01-01	1.876356894539480
1977-04-01	1.679718702593360
1977-07-01	1.702028180666130
1977-10-01	1.740118231249190
1978-01-01	2.149212161169490
1978-04-01	1.926195195952880
1978-07-01	1.960643226671980
1978-10-01	1.707281894024220
1979-01-01	2.062112350416370
1979-04-01	1.877768779854520
1979-07-01	1.885539573554780
1979-10-01	1.834181556279270
1980-01-01	1.964883706910690
1980-04-01	1.853645747614400
1980-07-01	1.948786857000920
1980-10-01	1.887325395152520
1981-01-01	2.093657379060600
1981-04-01	2.143521927958020
1981-07-01	1.823122262916800
1981-10-01	1.756039134891140
1982-01-01	2.048934553720040
1982-04-01	2.134132614780330
1982-07-01	2.104617459760170
1982-10-01	2.123424846374190
1983-01-01	2.629347235971090
1983-04-01	2.541659421193570
1983-07-01	2.577412595744480
1983-10-01	2.306707493858260
1984-01-01	2.803549974809130
1984-04-01	2.667974064396160
1984-07-01	2.539471588001900
1984-10-01	2.390729395125330
1985-01-01	2.589471501924660
1985-04-01	2.545846927803880
1985-07-01	2.439730542789230
1985-10-01	2.353797259056960
1986-01-01	2.772047756709520
1986-04-01	2.645718988744810
1986-07-01	2.556404449107650
1986-10-01	2.433087299714900
1987-01-01	2.936490285209680
1987-04-01	2.905083812506690
1987-07-01	2.276824806163900
1987-10-01	2.363578648391780
1988-01-01	2.624695854396790
1988-04-01	2.310687297278760
1988-07-01	2.353044949461900
1988-10-01	2.342339307370970
1989-01-01	2.423574372452530
1989-04-01	2.082035528327830
1989-07-01	1.977756881435100
1989-10-01	2.051741287310280
1990-01-01	2.098392645747640
1990-04-01	2.134268395418860
1990-07-01	2.031754656229270
1990-10-01	1.910380391898410
1991-01-01	1.999469873274280
1991-04-01	2.202679795528220
1991-07-01	2.112872507486200
1991-10-01	1.944330278774920
1992-01-01	2.197523008411950
1992-04-01	1.958869103497070
1992-07-01	2.071611248201820
1992-10-01	2.210870199892000
1993-01-01	2.389661353374220
1993-04-01	2.289228862149620
1993-07-01	2.422436860510910
1993-10-01	2.600125496915270
1994-01-01	2.930826249103870
1994-04-01	2.632184040717470
1994-07-01	2.875764378177030
1994-10-01	2.788004206471600
1995-01-01	2.957941062009920
1995-04-01	2.966515589180820
1995-07-01	3.068432974360180
1995-10-01	3.116578037638350
1996-01-01	3.048079388031930
1996-04-01	3.124622359154740
1996-07-01	3.097302053326260
1996-10-01	3.098087095616100
1997-01-01	3.187570507853700
1997-04-01	3.426188848621610
1997-07-01	3.197036493274450
1997-10-01	3.238878372756080
1998-01-01	3.315783690511050
1998-04-01	3.946154782089960
1998-07-01	4.178598245127600
1998-10-01	4.046567197279440
1999-01-01	4.422314953590140
1999-04-01	4.521524719218440
1999-07-01	4.513712515688450
1999-10-01	4.073403522594930
2000-01-01	4.567036856889640
2000-04-01	4.594743043306630
2000-07-01	4.329339339551760
2000-10-01	4.014243389623210
2001-01-01	4.424267376120370
2001-04-01	4.629662728635710
2001-07-01	4.745190997433300
2001-10-01	4.607891955312950
2002-01-01	5.293996515200630
2002-04-01	5.324349169052060
2002-07-01	5.206544124906400
2002-10-01	4.900735920824920
2003-01-01	5.078969396879620
2003-04-01	5.063672744148940
2003-07-01	4.918789595336060
2003-10-01	4.595100592665230
2004-01-01	4.619427115253890
2004-04-01	4.657998334468920
2004-07-01	4.402277247482540
2004-10-01	4.138668401311380
2005-01-01	4.452927870287950
2005-04-01	4.471562415589710
2005-07-01	4.354458873026840
2005-10-01	4.366274089194580
2006-01-01	3.950392895211410
2006-04-01	3.960667909604790
2006-07-01	4.000997484852500
2006-10-01	3.755859951771940
2007-01-01	4.024078651068270
2007-04-01	3.797893415896760
2007-07-01	3.827741876846920
2007-10-01	3.699699752842180
2008-01-01	3.991470452664830
2008-04-01	4.248039516007390
2008-07-01	4.121274600593040
2008-10-01	3.925721060706870
2009-01-01	4.676928355158680
2009-04-01	5.128111508256790
2009-07-01	5.444099809735210
2009-10-01	4.973592784476520
2010-01-01	4.884494334905800
2010-04-01	4.993526015640140
2010-07-01	4.873554462991050
2010-10-01	4.514533606950760
2011-01-01	4.464381236987100
2011-04-01	4.705770564243950
2011-07-01	4.371781894965340
2011-10-01	3.957459270927620
2012-01-01	4.336161452555590
2012-04-01	4.447926659565360
2012-07-01	4.205628114223270
2012-10-01	3.883452150164220
2013-01-01	3.863939615758980
2013-04-01	4.199160030925780
2013-07-01	3.886594779548660
2013-10-01	3.621395156926640
2014-01-01	3.576148384298770
2014-04-01	3.900904064536600
2014-07-01	3.668134227981360
2014-10-01	3.202695108672600
2015-01-01	3.205031919079930
2015-04-01	3.522950287691190
2015-07-01	3.378375419708770
2015-10-01	3.138277748675860
2016-01-01	2.970171028433250
2016-04-01	3.428881911111220
2016-07-01	2.919666103371340
2016-10-01	2.838113190431790
2017-01-01	2.770567548068770
2017-04-01	3.028904214808630
2017-07-01	2.665047935793570
2017-10-01	2.608599713732010
2018-01-01	2.459616810975000
2018-04-01	2.426333259249850
2018-07-01	2.400751018291660