Quarter	Percent
1968-01-01	1.296836985011450
1968-04-01	0.855075559670099
1968-07-01	0.935630635091268
1968-10-01	0.784440533828289
1969-01-01	1.105873965884630
1969-04-01	0.901580115590596
1969-07-01	0.881887702364272
1969-10-01	0.733476300721654
1970-01-01	1.016916945660180
1970-04-01	0.870284889239774
1970-07-01	0.833984724760111
1970-10-01	0.840600179187560
1971-01-01	1.112958402101020
1971-04-01	0.816885071178237
1971-07-01	0.834907957022595
1971-10-01	0.925112741826188
1972-01-01	1.338514868935060
1972-04-01	0.964307600865312
1972-07-01	0.965513128378840
1972-10-01	0.930207833276202
1973-01-01	1.152203657628160
1973-04-01	1.012414950958500
1973-07-01	0.958482627606178
1973-10-01	0.879327125188720
1974-01-01	1.300929606493980
1974-04-01	0.912130961340434
1974-07-01	1.085382735560280
1974-10-01	1.231615788697690
1975-01-01	1.810954971638250
1975-04-01	1.409167431903550
1975-07-01	1.486826845548600
1975-10-01	1.586445612664540
1976-01-01	2.067640804411380
1976-04-01	1.612079819486970
1976-07-01	1.496436597825250
1976-10-01	1.495957239482050
1977-01-01	1.860357760228340
1977-04-01	1.601268982807720
1977-07-01	1.573851821794170
1977-10-01	1.589934708063960
1978-01-01	2.048213477624410
1978-04-01	1.782224912281670
1978-07-01	1.851573711220050
1978-10-01	1.773012805218790
1979-01-01	1.911094693262440
1979-04-01	1.671450787049400
1979-07-01	1.645609250198170
1979-10-01	1.619118990424560
1980-01-01	1.701575976758170
1980-04-01	1.559784677951000
1980-07-01	1.642367911582070
1980-10-01	1.740393186306620
1981-01-01	1.871014912955650
1981-04-01	1.876812179883800
1981-07-01	1.668494459473070
1981-10-01	1.743874995853970
1982-01-01	1.973608092276440
1982-04-01	1.862461682829990
1982-07-01	1.845739529214910
1982-10-01	1.925085052084410
1983-01-01	2.408521883399320
1983-04-01	2.198742158056350
1983-07-01	2.145491478007480
1983-10-01	2.044566770403770
1984-01-01	2.346525960696840
1984-04-01	2.225285621214130
1984-07-01	2.093867578132160
1984-10-01	2.061785023960460
1985-01-01	2.260760962589050
1985-04-01	2.092295779402880
1985-07-01	1.989054125452070
1985-10-01	2.076318656268540
1986-01-01	2.317964459816090
1986-04-01	2.226428352084890
1986-07-01	2.134964521805260
1986-10-01	2.101950015387180
1987-01-01	2.439385379404250
1987-04-01	2.504489900298450
1987-07-01	2.037408507893460
1987-10-01	2.082408420451410
1988-01-01	2.288630231302250
1988-04-01	1.914770258248330
1988-07-01	1.917070639407610
1988-10-01	1.779117159583620
1989-01-01	1.899735238610750
1989-04-01	1.797860448045100
1989-07-01	1.674256416287760
1989-10-01	1.644623228565470
1990-01-01	1.734032669216140
1990-04-01	1.693836580168410
1990-07-01	1.611087192219440
1990-10-01	1.546427292715380
1991-01-01	1.671003327109540
1991-04-01	1.682882957445580
1991-07-01	1.632204993130040
1991-10-01	1.555582196630240
1992-01-01	1.740687631086480
1992-04-01	1.632437119944050
1992-07-01	1.683722404996790
1992-10-01	1.800820292722060
1993-01-01	1.963351719008240
1993-04-01	1.884107057120610
1993-07-01	1.996576214185360
1993-10-01	2.159017479340350
1994-01-01	2.424417883035870
1994-04-01	2.238173527524670
1994-07-01	2.382124775441610
1994-10-01	2.324530674117780
1995-01-01	2.527775935111070
1995-04-01	2.498817335869490
1995-07-01	2.590755518724850
1995-10-01	2.688309177554230
1996-01-01	2.683351905512190
1996-04-01	2.769823597167730
1996-07-01	2.683579016894320
1996-10-01	2.711855207019870
1997-01-01	2.751209936923430
1997-04-01	2.831684807831690
1997-07-01	2.868054289161880
1997-10-01	2.825304724471630
1998-01-01	2.977671785620610
1998-04-01	3.459380515822160
1998-07-01	3.618709730841520
1998-10-01	3.658265606339500
1999-01-01	3.965279749894460
1999-04-01	4.173963688133730
1999-07-01	3.956478492671430
1999-10-01	3.787685218293320
2000-01-01	4.225326656943810
2000-04-01	4.108942537336650
2000-07-01	3.991830723179910
2000-10-01	3.883358324438360
2001-01-01	4.148993009365230
2001-04-01	4.366083687540720
2001-07-01	4.416583926908310
2001-10-01	4.642341107198420
2002-01-01	4.854226443035070
2002-04-01	4.897768377885020
2002-07-01	4.989413363256090
2002-10-01	4.770774277543310
2003-01-01	4.849766993008890
2003-04-01	4.896145398698410
2003-07-01	4.669256711698640
2003-10-01	4.453372684430490
2004-01-01	4.561935163038530
2004-04-01	4.438281135013330
2004-07-01	4.351184624106700
2004-10-01	4.128367591957500
2005-01-01	4.402230563012680
2005-04-01	4.167742136198610
2005-07-01	4.091055349236030
2005-10-01	4.099828502569760
2006-01-01	4.033680429095030
2006-04-01	3.774828914231780
2006-07-01	3.890948651374980
2006-10-01	3.863589580353640
2007-01-01	3.852044412748570
2007-04-01	3.582442483344060
2007-07-01	3.628248352317500
2007-10-01	3.623376036078900
2008-01-01	3.877055214053770
2008-04-01	3.868018725006300
2008-07-01	3.841875353818300
2008-10-01	3.887841557780230
2009-01-01	4.548992627974200
2009-04-01	5.073563735984950
2009-07-01	5.307136368810570
2009-10-01	4.898145841553710
2010-01-01	4.920599560959340
2010-04-01	4.932862459170020
2010-07-01	4.923403040061860
2010-10-01	4.657544971316030
2011-01-01	4.591510846407860
2011-04-01	4.638409200122150
2011-07-01	4.396063136942380
2011-10-01	4.195314020749840
2012-01-01	4.284550533263190
2012-04-01	4.413460612891400
2012-07-01	4.296811961229630
2012-10-01	3.964804192567420
2013-01-01	4.266434659093160
2013-04-01	4.173922119568400
2013-07-01	3.995003012472430
2013-10-01	3.800399537171580
2014-01-01	3.666201351974470
2014-04-01	3.682077606493790
2014-07-01	3.632094931975760
2014-10-01	3.397715635134200
2015-01-01	3.467539283349540
2015-04-01	3.449446299836710
2015-07-01	3.459761329212920
2015-10-01	3.298289125896810
2016-01-01	3.180526058665630
2016-04-01	3.285861103063840
2016-07-01	3.058737745586580
2016-10-01	3.041064457749870
2017-01-01	2.930287113756710
2017-04-01	2.915200633218820
2017-07-01	2.838538675665520
2017-10-01	2.679024250966680
2018-01-01	2.538746941514350
2018-04-01	2.471438069172640
2018-07-01	2.452648629211760