Quarter	Percent
1968-01-01	1.311507151478760
1968-04-01	0.884432954870845
1968-07-01	0.957881781798006
1968-10-01	0.813062712806524
1969-01-01	1.155930863668430
1969-04-01	0.909344001641329
1969-07-01	0.877656077000243
1969-10-01	0.763295911686891
1970-01-01	1.044580753348030
1970-04-01	0.892090896179597
1970-07-01	0.877634399035317
1970-10-01	0.907383211500012
1971-01-01	1.164433200657870
1971-04-01	0.903334844717587
1971-07-01	0.901124190304750
1971-10-01	1.037004798592310
1972-01-01	1.488652536240180
1972-04-01	1.101116553740610
1972-07-01	1.021037147635460
1972-10-01	0.974789421865431
1973-01-01	1.246764383908750
1973-04-01	1.071259784151500
1973-07-01	0.963086894335580
1973-10-01	0.884288325412584
1974-01-01	1.366689035380250
1974-04-01	0.971223067855223
1974-07-01	1.082062781031510
1974-10-01	1.282490973307500
1975-01-01	1.863436790316150
1975-04-01	1.528867401608260
1975-07-01	1.559425512818010
1975-10-01	1.717964525478970
1976-01-01	2.195805440199580
1976-04-01	1.768161492303450
1976-07-01	1.654335043908780
1976-10-01	1.620110327254340
1977-01-01	2.028030848378810
1977-04-01	1.715108708572020
1977-07-01	1.652288248060600
1977-10-01	1.717980478953070
1978-01-01	2.218718354807260
1978-04-01	1.960577490832840
1978-07-01	1.906177814134020
1978-10-01	1.951665469140190
1979-01-01	2.084996211243540
1979-04-01	1.812487552782130
1979-07-01	1.766093456107170
1979-10-01	1.802593871618160
1980-01-01	1.890096441712660
1980-04-01	1.693948398077410
1980-07-01	1.744626294337810
1980-10-01	1.886439667552170
1981-01-01	2.110635746756870
1981-04-01	2.026934239205900
1981-07-01	1.821261049261130
1981-10-01	1.925810360047470
1982-01-01	2.115102494788850
1982-04-01	2.090962268337240
1982-07-01	1.986061846481790
1982-10-01	2.129248950989170
1983-01-01	2.635097692127870
1983-04-01	2.339850999273930
1983-07-01	2.334956628641180
1983-10-01	2.276584305229040
1984-01-01	2.606435263329300
1984-04-01	2.419166457209890
1984-07-01	2.301009488269550
1984-10-01	2.299655186834760
1985-01-01	2.493178024410040
1985-04-01	2.278447608963570
1985-07-01	2.159843458516820
1985-10-01	2.359415192276850
1986-01-01	2.588524346391650
1986-04-01	2.382103348360070
1986-07-01	2.373954621083740
1986-10-01	2.370316079714800
1987-01-01	2.732833270374320
1987-04-01	2.661272692734620
1987-07-01	2.324230400461270
1987-10-01	2.282492072226830
1988-01-01	2.486353495973900
1988-04-01	2.084740170188330
1988-07-01	2.128652788328510
1988-10-01	2.025847314292630
1989-01-01	2.117578994658140
1989-04-01	1.965351697172770
1989-07-01	1.830336820189200
1989-10-01	1.802306830209460
1990-01-01	1.910355248351400
1990-04-01	1.756651704878750
1990-07-01	1.721361607879750
1990-10-01	1.708817459472380
1991-01-01	1.799665728921710
1991-04-01	1.761070908016190
1991-07-01	1.738957321075040
1991-10-01	1.669071551852630
1992-01-01	1.839087464663500
1992-04-01	1.736665248105320
1992-07-01	1.774913771201620
1992-10-01	1.892959348906160
1993-01-01	2.033708858662730
1993-04-01	2.013319709177020
1993-07-01	2.086308624696730
1993-10-01	2.275973856509520
1994-01-01	2.559189688066060
1994-04-01	2.348194450008850
1994-07-01	2.515141864413070
1994-10-01	2.489019600275190
1995-01-01	2.660224625424220
1995-04-01	2.630049963892130
1995-07-01	2.633768101572140
1995-10-01	2.847494913243590
1996-01-01	2.909726673700010
1996-04-01	2.896346656246080
1996-07-01	2.821731010232450
1996-10-01	2.842108427835160
1997-01-01	2.904979347763530
1997-04-01	2.884041583385270
1997-07-01	2.927373962654230
1997-10-01	2.975986281746850
1998-01-01	3.234344143891230
1998-04-01	3.652075777483580
1998-07-01	3.729195139595460
1998-10-01	3.770872164374940
1999-01-01	4.122936818321260
1999-04-01	4.245334333514690
1999-07-01	4.065999944107950
1999-10-01	3.894803361249210
2000-01-01	4.368146126428420
2000-04-01	4.289631554209460
2000-07-01	4.065757896703330
2000-10-01	3.976467989746000
2001-01-01	4.300438537643310
2001-04-01	4.447217527841830
2001-07-01	4.434669709123990
2001-10-01	4.704680552487590
2002-01-01	4.801843272718160
2002-04-01	4.942008479682300
2002-07-01	4.811944581650800
2002-10-01	4.781081385580210
2003-01-01	4.909890231184650
2003-04-01	4.894644114925970
2003-07-01	4.569746681360190
2003-10-01	4.464457929084940
2004-01-01	4.436142476803620
2004-04-01	4.228458197013380
2004-07-01	4.165992778282370
2004-10-01	3.983044531436190
2005-01-01	4.216418741569680
2005-04-01	3.964437366606160
2005-07-01	3.831543770592980
2005-10-01	3.924920725375910
2006-01-01	3.930466149231620
2006-04-01	3.699012524647050
2006-07-01	3.658462030621010
2006-10-01	3.622957447421210
2007-01-01	3.671611891721270
2007-04-01	3.412640805616030
2007-07-01	3.338176557755390
2007-10-01	3.385212660113470
2008-01-01	3.672282192337040
2008-04-01	3.681025424967220
2008-07-01	3.605985231665160
2008-10-01	3.655365358006120
2009-01-01	4.188755780134570
2009-04-01	4.800709470519300
2009-07-01	5.005905396129630
2009-10-01	4.666231225429770
2010-01-01	4.639537807362150
2010-04-01	4.769684562351470
2010-07-01	4.707277335997600
2010-10-01	4.466884081195930
2011-01-01	4.411701856463490
2011-04-01	4.459822664659010
2011-07-01	4.171641836961800
2011-10-01	3.971390763144680
2012-01-01	4.138560409795030
2012-04-01	4.180725969935820
2012-07-01	3.951089152525880
2012-10-01	3.784284960553850
2013-01-01	3.997125992229140
2013-04-01	3.872338394735020
2013-07-01	3.729922045630360
2013-10-01	3.516931377545070
2014-01-01	3.403979321164450
2014-04-01	3.440092738397050
2014-07-01	3.381286424748510
2014-10-01	3.133750545903470
2015-01-01	3.244736627438970
2015-04-01	3.215617796936370
2015-07-01	3.192587402958640
2015-10-01	2.985101364198430
2016-01-01	3.015779164226720
2016-04-01	3.050406124859140
2016-07-01	2.909591397468670
2016-10-01	2.791834797742180
2017-01-01	2.734370702833160
2017-04-01	2.752214179934130
2017-07-01	2.630920167743380
2017-10-01	2.517377333258910
2018-01-01	2.327048902420520
2018-04-01	2.323267838155130
2018-07-01	2.326954980175040