Quarter	Percent
1968-01-01	1.288850455515950
1968-04-01	0.873755604777293
1968-07-01	0.931986145825062
1968-10-01	0.845356568534003
1969-01-01	1.080736014286650
1969-04-01	0.869985857698187
1969-07-01	0.882379052285308
1969-10-01	0.669951084063419
1970-01-01	1.059748773070870
1970-04-01	0.841770253869758
1970-07-01	0.873633386448541
1970-10-01	0.836676338561470
1971-01-01	1.160782034296930
1971-04-01	0.769193093732104
1971-07-01	0.735613376292885
1971-10-01	0.902884932563687
1972-01-01	1.335612373280300
1972-04-01	0.976144652534636
1972-07-01	0.974343240837099
1972-10-01	0.998902064119455
1973-01-01	1.170530198354160
1973-04-01	1.037763029324130
1973-07-01	0.882321478931451
1973-10-01	0.904719250188879
1974-01-01	1.261538474382760
1974-04-01	0.902782933107177
1974-07-01	1.025749713640000
1974-10-01	1.118202887735790
1975-01-01	1.765193670210390
1975-04-01	1.301831661580360
1975-07-01	1.499620567435110
1975-10-01	1.652519464501910
1976-01-01	2.147161526941500
1976-04-01	1.637866782974090
1976-07-01	1.509153057018010
1976-10-01	1.593406413197680
1977-01-01	1.864618398180870
1977-04-01	1.529589095030670
1977-07-01	1.485903832327950
1977-10-01	1.504887906042430
1978-01-01	2.044553370298540
1978-04-01	1.711797210167470
1978-07-01	1.800838755030790
1978-10-01	1.836697479494660
1979-01-01	1.852369746526130
1979-04-01	1.498617386583700
1979-07-01	1.532011940504250
1979-10-01	1.518698479378620
1980-01-01	1.538796252914770
1980-04-01	1.398717267693890
1980-07-01	1.436025910419930
1980-10-01	1.641036449369020
1981-01-01	1.681222659262870
1981-04-01	1.743958820852830
1981-07-01	1.563912154215360
1981-10-01	1.736636781813350
1982-01-01	1.903614602328710
1982-04-01	1.686121919584950
1982-07-01	1.702865725512850
1982-10-01	1.779253942243370
1983-01-01	2.276291061624810
1983-04-01	1.973379283628820
1983-07-01	1.903567659944640
1983-10-01	1.871347495656480
1984-01-01	2.059430188471170
1984-04-01	1.936875566560480
1984-07-01	1.841760190910990
1984-10-01	1.856160211943880
1985-01-01	2.047622657257390
1985-04-01	1.794804409312540
1985-07-01	1.718218271441320
1985-10-01	1.915347918291720
1986-01-01	2.050344817819230
1986-04-01	1.972211261179350
1986-07-01	1.870203866898380
1986-10-01	1.906465542443200
1987-01-01	2.156907920532210
1987-04-01	2.221370745718090
1987-07-01	1.872319875730120
1987-10-01	1.891738016203670
1988-01-01	2.077651766243280
1988-04-01	1.683235748838200
1988-07-01	1.625427411623320
1988-10-01	1.444803773663420
1989-01-01	1.566172634938170
1989-04-01	1.598796259985420
1989-07-01	1.477500867006840
1989-10-01	1.404391224508960
1990-01-01	1.484177011044430
1990-04-01	1.414590417735030
1990-07-01	1.334459919591610
1990-10-01	1.332680202788910
1991-01-01	1.455039305096950
1991-04-01	1.361895204395500
1991-07-01	1.325499350865040
1991-10-01	1.296686573840250
1992-01-01	1.453211187824880
1992-04-01	1.427214274166950
1992-07-01	1.413774588016470
1992-10-01	1.537994744275550
1993-01-01	1.660172140793180
1993-04-01	1.627234619238430
1993-07-01	1.702920231338210
1993-10-01	1.852568266840830
1994-01-01	2.091682325284350
1994-04-01	1.971920147450340
1994-07-01	2.055365489424140
1994-10-01	2.016774117538360
1995-01-01	2.243885248283640
1995-04-01	2.210290797587120
1995-07-01	2.274156193732730
1995-10-01	2.417618635638660
1996-01-01	2.429263543756470
1996-04-01	2.519011206531550
1996-07-01	2.395516427594790
1996-10-01	2.466085257239530
1997-01-01	2.447410684411020
1997-04-01	2.440537942889990
1997-07-01	2.645370458048210
1997-10-01	2.546090554801380
1998-01-01	2.737706229191800
1998-04-01	3.152673340399500
1998-07-01	3.238986922807750
1998-10-01	3.382946377423240
1999-01-01	3.659936068602910
1999-04-01	3.961770076622860
1999-07-01	3.566101557853790
1999-10-01	3.582304583734330
2000-01-01	4.033500414552240
2000-04-01	3.800551115967570
2000-07-01	3.762482889978080
2000-10-01	3.770271458245880
2001-01-01	3.948959520567670
2001-04-01	4.161034712200580
2001-07-01	4.192356750325200
2001-10-01	4.666711550057450
2002-01-01	4.553042782596050
2002-04-01	4.614988185765260
2002-07-01	4.828348360498690
2002-10-01	4.693933709079790
2003-01-01	4.643215723510630
2003-04-01	4.779688437496560
2003-07-01	4.485028589707050
2003-10-01	4.389692943591520
2004-01-01	4.509656969944440
2004-04-01	4.309178081218650
2004-07-01	4.277964777522280
2004-10-01	4.132929832413850
2005-01-01	4.316178341273540
2005-04-01	3.964520741810080
2005-07-01	3.877965522578530
2005-10-01	3.923953942566840
2006-01-01	4.107218011515200
2006-04-01	3.640731114523580
2006-07-01	3.811043618486120
2006-10-01	3.901721743663100
2007-01-01	3.757700429835700
2007-04-01	3.442236414072800
2007-07-01	3.513297090398820
2007-10-01	3.568718820978580
2008-01-01	3.795895884973870
2008-04-01	3.609111778352280
2008-07-01	3.642245049244520
2008-10-01	3.889079595981870
2009-01-01	4.458159250801700
2009-04-01	5.057954818609600
2009-07-01	5.195731090673630
2009-10-01	4.846675996804080
2010-01-01	4.935589418348040
2010-04-01	4.919373644045100
2010-07-01	4.934457079266550
2010-10-01	4.803534192916630
2011-01-01	4.710099684039570
2011-04-01	4.614786736247410
2011-07-01	4.361799816345270
2011-10-01	4.369372687189640
2012-01-01	4.259481593555960
2012-04-01	4.374081950830240
2012-07-01	4.376735809056170
2012-10-01	4.028070331953340
2013-01-01	4.555989268196550
2013-04-01	4.084707582470870
2013-07-01	4.049077901363010
2013-10-01	3.882277833360170
2014-01-01	3.693852062007060
2014-04-01	3.502186905627360
2014-07-01	3.564857089284070
2014-10-01	3.481288091335260
2015-01-01	3.625071493814780
2015-04-01	3.338560417316190
2015-07-01	3.482634227281460
2015-10-01	3.408935097369590
2016-01-01	3.328835730714180
2016-04-01	3.175011617873570
2016-07-01	3.126626029050130
2016-10-01	3.171871447016460
2017-01-01	3.039665474855110
2017-04-01	2.852863071207420
2017-07-01	2.975177639063580
2017-10-01	2.749053388477810
2018-01-01	2.615784297270000
2018-04-01	2.508245883989260
2018-07-01	2.522312496537160