Quarter	Percent
1969-01-01	3.501308900523560
1969-04-01	1.325820351342390
1969-07-01	1.372997711670480
1969-10-01	1.954937044400260
1970-01-01	2.338009352037410
1970-04-01	0.996015936254980
1970-07-01	0.956464379947230
1970-10-01	1.359867330016580
1971-01-01	1.675603217158180
1971-04-01	1.031613976705490
1971-07-01	0.858936240502147
1971-10-01	1.387970918704560
1972-01-01	1.531291611185090
1972-04-01	0.865224625623960
1972-07-01	1.146037982973150
1972-10-01	1.115119711380780
1973-01-01	1.349572086899280
1973-04-01	0.990752972258917
1973-07-01	0.945241199478488
1973-10-01	1.054018445322790
1974-01-01	1.615029663810150
1974-04-01	1.073170731707320
1974-07-01	1.111474338018960
1974-10-01	1.582069874752800
1975-01-01	1.858612678393630
1975-04-01	1.542071739859200
1975-07-01	1.473543201607500
1975-10-01	2.135468802135470
1976-01-01	2.352941176470590
1976-04-01	1.531291611185090
1976-07-01	1.561980724493190
1976-10-01	1.789857474312230
1977-01-01	1.925630810092960
1977-04-01	1.252471984179300
1977-07-01	1.532442125855890
1977-10-01	1.842105263157890
1978-01-01	2.186684073107050
1978-04-01	1.865183246073300
1978-07-01	1.802381718699710
1978-10-01	2.396373056994820
1979-01-01	2.634146341463410
1979-04-01	1.766784452296820
1979-07-01	1.810673443456160
1979-10-01	2.205177372962610
1980-01-01	2.021822849807450
1980-04-01	1.528662420382170
1980-07-01	1.858974358974360
1980-10-01	2.007648183556410
1981-01-01	2.485659655831740
1981-04-01	2.240454402019560
1981-07-01	2.286967418546370
1981-10-01	3.049355548569630
1982-01-01	3.461888855147280
1982-04-01	2.831050228310500
1982-07-01	3.396453261196270
1982-10-01	4.170444242973710
1983-01-01	5.025890953396280
1983-04-01	3.762135922330100
1983-07-01	3.810099788327790
1983-10-01	3.832116788321170
1984-01-01	4.867124514780530
1984-04-01	3.293413173652700
1984-07-01	3.216287990557690
1984-10-01	3.823355068168350
1985-01-01	4.453078302450690
1985-04-01	3.102625298329360
1985-07-01	3.185471866626970
1985-10-01	3.656361474435200
1986-01-01	4.139368671828470
1986-04-01	2.524502524502520
1986-07-01	2.456858730622990
1986-10-01	3.417796110783740
1987-01-01	4.807974201114040
1987-04-01	3.229594832648270
1987-07-01	3.529071449233440
1987-10-01	3.613053613053610
1988-01-01	4.313611192072280
1988-04-01	3.084606345475910
1988-07-01	3.222996515679440
1988-10-01	3.633720930232560
1989-01-01	3.567251461988300
1989-04-01	2.906976744186050
1989-07-01	2.642918701522550
1989-10-01	3.413364188602840
1990-01-01	3.608247422680410
1990-04-01	2.975679542203150
1990-07-01	3.066104078762310
1990-10-01	3.311815885489760
1991-01-01	3.827884884045820
1991-04-01	3.163493840985440
1991-07-01	3.238306116800440
1991-10-01	3.673018503175920
1992-01-01	3.790167536391100
1992-04-01	3.520742358078600
1992-07-01	3.261455525606470
1992-10-01	3.800217155266020
1993-01-01	4.434167573449400
1993-04-01	4.246170384305290
1993-07-01	3.913738019169330
1993-10-01	4.275788348476750
1994-01-01	4.089026915113870
1994-04-01	3.179116050659080
1994-07-01	3.363914373088680
1994-10-01	3.679709769370300
1995-01-01	4.373401534526850
1995-04-01	3.395935168510420
1995-07-01	3.369065849923430
1995-10-01	3.660737303428720
1996-01-01	5.276705276705280
1996-04-01	3.551062726801450
1996-07-01	3.667355371900830
1996-10-01	4.064198809215640
1997-01-01	5.081248387928810
1997-04-01	3.621314019658560
1997-07-01	4.122919334186940
1997-10-01	4.144144144144140
1998-01-01	5.230769230769230
1998-04-01	4.122648801855190
1998-07-01	3.675147776921100
1998-10-01	3.914499098635080
1999-01-01	4.700000000000000
1999-04-01	3.500000000000000
1999-07-01	3.200000000000000
1999-10-01	3.500000000000000
2000-01-01	4.700000000000000
2000-04-01	3.100000000000000
2000-07-01	3.100000000000000
2000-10-01	3.200000000000000
2001-01-01	4.000000000000000
2001-04-01	3.400000000000000
2001-07-01	3.300000000000000
2001-10-01	3.700000000000000
2002-01-01	4.900000000000000
2002-04-01	3.600000000000000
2002-07-01	3.600000000000000
2002-10-01	3.800000000000000
2003-01-01	4.800000000000000
2003-04-01	4.200000000000000
2003-07-01	3.900000000000000
2003-10-01	4.300000000000000
2004-01-01	5.800000000000000
2004-04-01	5.400000000000000
2004-07-01	5.300000000000000
2004-10-01	5.400000000000000
2005-01-01	5.700000000000000
2005-04-01	5.700000000000000
2005-07-01	5.600000000000000
2005-10-01	5.600000000000000
2006-01-01	6.000000000000000
2006-04-01	5.200000000000000
2006-07-01	4.900000000000000
2006-10-01	4.900000000000000
2007-01-01	5.200000000000000
2007-04-01	5.000000000000000
2007-07-01	4.900000000000000
2007-10-01	4.400000000000000
2008-01-01	4.500000000000000
2008-04-01	3.700000000000000
2008-07-01	4.000000000000000
2008-10-01	4.300000000000000
2009-01-01	5.000000000000000
2009-04-01	5.300000000000000
2009-07-01	5.700000000000000
2009-10-01	5.300000000000000
2010-01-01	5.200000000000000
2010-04-01	4.900000000000000
2010-07-01	4.800000000000000
2010-10-01	4.400000000000000
2011-01-01	5.100000000000000
2011-04-01	4.400000000000000
2011-07-01	4.000000000000000
2011-10-01	4.800000000000000
2012-01-01	4.700000000000000
2012-04-01	4.800000000000000
2012-07-01	5.100000000000000
2012-10-01	4.900000000000000
2013-01-01	5.700000000000000
2013-04-01	5.000000000000000
2013-07-01	5.300000000000000
2013-10-01	5.400000000000000
2014-01-01	6.000000000000000
2014-04-01	5.400000000000000
2014-07-01	5.600000000000000
2014-10-01	5.600000000000000
2015-01-01	5.800000000000000
2015-04-01	5.800000000000000
2015-07-01	5.600000000000000
2015-10-01	5.700000000000000
2016-01-01	6.300000000000000
2016-04-01	6.100000000000000
2016-07-01	6.100000000000000
2016-10-01	5.600000000000000
2017-01-01	6.000000000000000
2017-04-01	5.400000000000000
2017-07-01	5.500000000000000
2017-10-01	5.300000000000000
2018-01-01	5.300000000000000
2018-04-01	4.600000000000000