Quarter	Percent
1986-01-01	3.74592833876222
1986-04-01	3.57856857257097
1986-07-01	3.45786963434022
1986-10-01	3.26303223239156
1987-01-01	3.34322453016815
1987-04-01	3.13479623824451
1987-07-01	3.19272445820433
1987-10-01	2.76876074088218
1988-01-01	3.74734402163415
1988-04-01	3.71853546910755
1988-07-01	4.64408070041873
1988-10-01	4.09445819843839
1989-01-01	5.11592259053458
1989-04-01	5.24193548387097
1989-07-01	4.89430584650543
1989-10-01	5.03037205770691
1990-01-01	5.18841128574134
1990-04-01	4.75394614670381
1990-07-01	5.42994810971090
1990-10-01	5.94041308718699
1991-01-01	7.43218806509946
1991-04-01	7.48165383926973
1991-07-01	7.17367853290183
1991-10-01	7.19295090811005
1992-01-01	7.98790250845045
1992-04-01	7.48550342646284
1992-07-01	7.05298600035442
1992-10-01	7.56229308241854
1993-01-01	7.30465320456541
1993-04-01	7.23183391003460
1993-07-01	6.47877642206565
1993-10-01	6.13810741687979
1994-01-01	7.02875399361022
1994-04-01	5.46639919759278
1994-07-01	5.35150407179658
1994-10-01	5.51779935275081
1995-01-01	5.30930345835363
1995-04-01	5.20147696259432
1995-07-01	4.41927249521378
1995-10-01	4.63503074255084
1996-01-01	5.14374514374514
1996-04-01	5.13054037644202
1996-07-01	4.89814260035950
1996-10-01	4.40355904086865
1997-01-01	5.66491359879790
1997-04-01	5.34567716888159
1997-07-01	4.96516970505410
1997-10-01	4.79737783075089
1998-01-01	6.03333825047942
1998-04-01	6.54796939376104
1998-07-01	5.67085647471500
1998-10-01	6.14765871875898
1999-01-01	5.96801827527127
1999-04-01	5.59648625672995
1999-07-01	5.04678196767791
1999-10-01	4.70157657657658
2000-01-01	5.30249612184459
2000-04-01	4.90056818181818
2000-07-01	4.41176470588235
2000-10-01	3.76967688483844
2001-01-01	4.25444031391987
2001-04-01	4.02417250377695
2001-07-01	3.91008174386921
2001-10-01	3.91344997996527
2002-01-01	4.39266104191777
2002-04-01	4.33333333333333
2002-07-01	4.10452685759535
2002-10-01	3.58586517146955
2003-01-01	4.26981008513425
2003-04-01	4.06946604458269
2003-07-01	3.67206426112457
2003-10-01	3.67563471011747
2004-01-01	4.29618397776093
2004-04-01	3.12539541946096
2004-07-01	2.96919460596313
2004-10-01	2.79575143450128
2005-01-01	3.20029204185933
2005-04-01	2.54730713245997
2005-07-01	2.84111257013251
2005-10-01	2.94187993303038
2006-01-01	3.43148895749228
2006-04-01	2.65413975337639
2006-07-01	2.72028385570668
2006-10-01	2.57383465781046
2007-01-01	3.11406578026592
2007-04-01	2.47713855770344
2007-07-01	2.51895043731778
2007-10-01	2.27819118488838
2008-01-01	3.22954045607130
2008-04-01	2.44262667575551
2008-07-01	2.74941084053417
2008-10-01	2.80373831775701
2009-01-01	3.49384098544233
2009-04-01	3.47214469130289
2009-07-01	3.96613190730838
2009-10-01	4.08118243988529
2010-01-01	4.71499723298284
2010-04-01	4.33487756452680
2010-07-01	4.44223985890652
2010-10-01	4.28070943726735
2011-01-01	4.89412273120138
2011-04-01	4.31872165838912
2011-07-01	4.77476504267041
2011-10-01	4.17514184776790
2012-01-01	5.18898142216528
2012-04-01	4.77917644548752
2012-07-01	5.20954907161804
2012-10-01	4.28170836928387
2013-01-01	5.22813688212928
2013-04-01	4.75333474486555
2013-07-01	4.48041775456919
2013-10-01	4.46123589690508
2014-01-01	4.83076923076923
2014-04-01	4.31222141598424
2014-07-01	4.50532724505327
2014-10-01	4.44734464411204
2015-01-01	4.69798657718121
2015-04-01	4.67647651683128
2015-07-01	4.36323142336505
2015-10-01	3.84346610761705
2016-01-01	4.31612140323216
2016-04-01	3.96182764603817
2016-07-01	3.79078694817658
2016-10-01	3.98000565877582
2017-01-01	4.48304847296161
2017-04-01	3.56873822975518
2017-07-01	3.66134833533155
2017-10-01	3.35872258419749
2018-01-01	3.90297282509575
2018-04-01	3.51481112419603
2018-07-01	3.04261466233297