Quarter	Percent
1986-01-01	2.90020988361000
1986-04-01	3.00737658407414
1986-07-01	3.07183364839319
1986-10-01	2.90632054176072
1987-01-01	2.97713485767616
1987-04-01	2.87510400295831
1987-07-01	3.08130978660780
1987-10-01	2.89218378180487
1988-01-01	3.58822986809335
1988-04-01	3.91816604256096
1988-07-01	4.96525237746891
1988-10-01	4.45090380597693
1989-01-01	5.31924583295382
1989-04-01	5.71663019693654
1989-07-01	5.40074430425706
1989-10-01	5.29220191785779
1990-01-01	5.82637579675016
1990-04-01	5.88969081350798
1990-07-01	6.25333570539050
1990-10-01	6.80623686054660
1991-01-01	8.12244543003740
1991-04-01	8.33333333333334
1991-07-01	8.65733540694660
1991-10-01	8.65093768905021
1992-01-01	8.97655314051001
1992-04-01	8.42391304347826
1992-07-01	8.49121010411333
1992-10-01	8.47557884062870
1993-01-01	8.28897338403042
1993-04-01	8.11241610738255
1993-07-01	7.93491024995806
1993-10-01	7.51469006041546
1994-01-01	7.77466644704332
1994-04-01	6.65522034175456
1994-07-01	6.61427635887361
1994-10-01	6.09726590854101
1995-01-01	5.88849614395887
1995-04-01	5.26987164155306
1995-07-01	4.89721406460830
1995-10-01	4.86286254728878
1996-01-01	5.31483790523691
1996-04-01	5.04331683168317
1996-07-01	5.06785248792456
1996-10-01	4.85265977803291
1997-01-01	5.73413758876078
1997-04-01	5.37413412499048
1997-07-01	5.53371635923798
1997-10-01	5.29016677986567
1998-01-01	6.17432503572234
1998-04-01	6.66666666666667
1998-07-01	6.27880619569324
1998-10-01	6.33960573476702
1999-01-01	6.33534810835012
1999-04-01	6.02445571130331
1999-07-01	5.36195034400239
1999-10-01	4.99889404998894
2000-01-01	5.15867158671587
2000-04-01	4.90123273429378
2000-07-01	4.56691751512469
2000-10-01	4.01059680624034
2001-01-01	4.42940181002134
2001-04-01	4.24273782245547
2001-07-01	4.07002511449254
2001-10-01	4.17665431829738
2002-01-01	4.52305015946651
2002-04-01	4.09848042080655
2002-07-01	4.22106179286336
2002-10-01	3.62000719683339
2003-01-01	3.98128149748020
2003-04-01	3.66223634787634
2003-07-01	3.54254633936878
2003-10-01	3.29842558951343
2004-01-01	3.76877302351941
2004-04-01	2.85246834542609
2004-07-01	2.72938853233655
2004-10-01	2.60536398467433
2005-01-01	3.11870528582344
2005-04-01	2.62075695267303
2005-07-01	2.61109197382019
2005-10-01	2.75342465753423
2006-01-01	3.21166883517086
2006-04-01	2.48871872008752
2006-07-01	2.63409308038762
2006-10-01	2.55409476855654
2007-01-01	2.83442088091354
2007-04-01	2.55049989798000
2007-07-01	2.37688682467045
2007-10-01	2.36854571293226
2008-01-01	2.92829775588396
2008-04-01	2.64846969799338
2008-07-01	2.85752796872894
2008-10-01	2.99617936859039
2009-01-01	3.95999459386405
2009-04-01	3.94178289872650
2009-07-01	4.40618221258134
2009-10-01	4.57573514568333
2010-01-01	4.89562289562288
2010-04-01	4.72680551798756
2010-07-01	4.41375575412943
2010-10-01	4.46863169280691
2011-01-01	4.71584038694075
2011-04-01	4.36422413793104
2011-07-01	4.75772708867594
2011-10-01	4.48213204118716
2012-01-01	5.18633122561550
2012-04-01	4.94632422883544
2012-07-01	5.24809160305344
2012-10-01	4.35228905768836
2013-01-01	4.69966817904789
2013-04-01	4.63854604638544
2013-07-01	4.30519175230036
2013-10-01	4.03015947154200
2014-01-01	4.43117744610282
2014-04-01	3.88840801651242
2014-07-01	4.37360031616388
2014-10-01	4.12675501902637
2015-01-01	4.31270358306189
2015-04-01	4.29427863938486
2015-07-01	4.13987665660674
2015-10-01	3.64191119189821
2016-01-01	4.15865692682302
2016-04-01	3.80838474128163
2016-07-01	3.67087027094519
2016-10-01	3.95060211354141
2017-01-01	4.04553522247384
2017-04-01	3.49598971407580
2017-07-01	3.34381424597896
2017-10-01	3.18490475332011
2018-01-01	3.41783477482851
2018-04-01	3.34737966644905
2018-07-01	3.19249380384752