Quarter	Percent
1986-01-01	8.76787216148024
1986-04-01	7.95732384974439
1986-07-01	7.56130790190736
1986-10-01	7.86343612334802
1987-01-01	8.29311101360246
1987-04-01	8.45421577515866
1987-07-01	7.40135419098762
1987-10-01	8.73698506111363
1988-01-01	10.44603651490640
1988-04-01	10.90335114133070
1988-07-01	11.22525682786270
1988-10-01	11.80063523088200
1989-01-01	14.26112613720190
1989-04-01	13.82177188880230
1989-07-01	13.97078353253650
1989-10-01	13.40516161363070
1990-01-01	13.62831858407080
1990-04-01	13.81679389312980
1990-07-01	14.45751633986930
1990-10-01	15.89020397884660
1991-01-01	18.45177664974620
1991-04-01	18.56651679449880
1991-07-01	20.45454545454550
1991-10-01	19.91264131551900
1992-01-01	21.26168224299070
1992-04-01	18.27160493827160
1992-07-01	18.47490888701990
1992-10-01	18.63370547581070
1993-01-01	19.57985456504170
1993-04-01	18.63930278324430
1993-07-01	15.91685649202730
1993-10-01	17.35024284943340
1994-01-01	18.00694629975960
1994-04-01	16.37689287717330
1994-07-01	13.46848097750620
1994-10-01	14.02144772117960
1995-01-01	13.04700162074550
1995-04-01	11.52137701277070
1995-07-01	11.66390270867880
1995-10-01	12.81250000000000
1996-01-01	13.09364099812180
1996-04-01	11.44044321329640
1996-07-01	12.11538461538460
1996-10-01	12.21248630887190
1997-01-01	13.19520174482010
1997-04-01	13.26960922125390
1997-07-01	13.80000000000000
1997-10-01	14.06420021762790
1998-01-01	15.80404096318850
1998-04-01	14.72553006099330
1998-07-01	14.26876297834470
1998-10-01	15.26919682259490
1999-01-01	15.61393152302240
1999-04-01	14.93750000000000
1999-07-01	13.62095531587060
1999-10-01	12.59172292339300
2000-01-01	14.96899911426040
2000-04-01	13.61058601134220
2000-07-01	12.17583807716640
2000-10-01	13.28855140186920
2001-01-01	13.26530612244900
2001-04-01	11.72707889125800
2001-07-01	11.18623232944070
2001-10-01	12.22381635581060
2002-01-01	11.77460050462570
2002-04-01	11.58447621826670
2002-07-01	12.27138643067850
2002-10-01	11.34512777309740
2003-01-01	12.16857382082050
2003-04-01	10.09040536599590
2003-07-01	9.08052541404911
2003-10-01	10.53489003529730
2004-01-01	9.54856361149111
2004-04-01	10.63646788990830
2004-07-01	9.37768855749928
2004-10-01	9.06715442905670
2005-01-01	11.05704244390380
2005-04-01	9.55040491482826
2005-07-01	9.61060480530240
2005-10-01	8.81737310308739
2006-01-01	10.73859339551300
2006-04-01	9.24794047302684
2006-07-01	9.72222222222222
2006-10-01	9.96727913415555
2007-01-01	11.84144505770200
2007-04-01	9.24057355284121
2007-07-01	9.90491283676704
2007-10-01	8.54398382204247
2008-01-01	11.39910076699290
2008-04-01	10.11296395911780
2008-07-01	10.49618320610690
2008-10-01	11.74821610601430
2009-01-01	14.08413205537810
2009-04-01	15.58726673984630
2009-07-01	16.28691983122360
2009-10-01	17.52330226364850
2010-01-01	16.49877484345220
2010-04-01	17.32283464566930
2010-07-01	15.63914027149320
2010-10-01	16.09442060085840
2011-01-01	17.25060176517790
2011-04-01	15.90653153153150
2011-07-01	14.87296602911790
2011-10-01	15.77090119435400
2012-01-01	17.33903286134120
2012-04-01	15.56420233463040
2012-07-01	16.15622365833100
2012-10-01	17.80821917808220
2013-01-01	15.42081949058690
2013-04-01	14.71514457486400
2013-07-01	14.99573984663450
2013-10-01	15.04955659885240
2014-01-01	15.15783981215760
2014-04-01	13.39869281045750
2014-07-01	12.80437756497950
2014-10-01	14.21639980591950
2015-01-01	14.37606421795180
2015-04-01	13.24503311258280
2015-07-01	14.22302529685080
2015-10-01	12.94893720987050
2016-01-01	14.13973384030420
2016-04-01	12.26063168366080
2016-07-01	12.69841269841270
2016-10-01	13.69644484958980
2017-01-01	13.18555758683730
2017-04-01	12.52465483234710
2017-07-01	12.67436267436270
2017-10-01	12.31150123790230
2018-01-01	12.22924187725630
2018-04-01	11.58767772511850
2018-07-01	9.31125509959203