Quarter	Percent
1986-01-01	8.68380062305296
1986-04-01	7.79647107098892
1986-07-01	7.40897544453853
1986-10-01	7.78193924261340
1987-01-01	8.14144736842105
1987-04-01	8.98587933247754
1987-07-01	8.32249674902471
1987-10-01	9.24831081081081
1988-01-01	11.55187445510030
1988-04-01	11.25284738041000
1988-07-01	11.88351338656650
1988-10-01	13.33638863428050
1989-01-01	14.87341772151900
1989-04-01	14.91312741312740
1989-07-01	15.11570654849830
1989-10-01	13.56570890249650
1990-01-01	13.80145278450360
1990-04-01	14.98291849682770
1990-07-01	15.72358537806710
1990-10-01	16.77018633540370
1991-01-01	19.28294573643410
1991-04-01	20.35443037974680
1991-07-01	22.79260780287470
1991-10-01	22.78911564625850
1992-01-01	22.74951076320940
1992-04-01	21.06084243369740
1992-07-01	20.81109925293490
1992-10-01	20.20253164556960
1993-01-01	21.35971588026380
1993-04-01	20.38988408851420
1993-07-01	16.83006535947710
1993-10-01	18.24220746039860
1994-01-01	18.53360488798370
1994-04-01	16.79064824654620
1994-07-01	13.80031364349190
1994-10-01	15.19434628975260
1995-01-01	12.63264274886310
1995-04-01	11.89104243059190
1995-07-01	12.09424083769630
1995-10-01	12.77013752455800
1996-01-01	13.59470468431770
1996-04-01	11.83306920232440
1996-07-01	12.53263707571800
1996-10-01	13.30275229357800
1997-01-01	12.34375000000000
1997-04-01	14.50053705692800
1997-07-01	13.42062193126020
1997-10-01	14.87390633041690
1998-01-01	15.91027647365680
1998-04-01	15.85976627712850
1998-07-01	15.67844925883690
1998-10-01	16.91792294807370
1999-01-01	17.05685618729100
1999-04-01	16.38185032410140
1999-07-01	14.73136915077990
1999-10-01	12.82333516785910
2000-01-01	15.75152523571820
2000-04-01	14.17274939172750
2000-07-01	13.71257485029940
2000-10-01	14.52145214521450
2001-01-01	13.13868613138690
2001-04-01	12.67688679245280
2001-07-01	10.56581986143190
2001-10-01	12.90672451193060
2002-01-01	10.94736842105260
2002-04-01	12.04070096099490
2002-07-01	13.07262569832400
2002-10-01	11.29795060430900
2003-01-01	11.51611199154780
2003-04-01	10.09933774834440
2003-07-01	9.19978225367447
2003-10-01	10.45314109165810
2004-01-01	8.18652849740933
2004-04-01	9.30356193514088
2004-07-01	9.28609769189479
2004-10-01	8.93743793445879
2005-01-01	10.85972850678730
2005-04-01	9.26216640502355
2005-07-01	9.41300898995241
2005-10-01	7.95568982880161
2006-01-01	9.67276227141482
2006-04-01	8.46774193548387
2006-07-01	9.63608405945669
2006-10-01	10.09086561453850
2007-01-01	11.90935390549660
2007-04-01	8.11921891058582
2007-07-01	10.16016016016020
2007-10-01	9.44767441860465
2008-01-01	11.92152917505030
2008-04-01	10.31298101590560
2008-07-01	11.53846153846150
2008-10-01	11.43838978890530
2009-01-01	13.82978723404260
2009-04-01	13.42036553524800
2009-07-01	17.08652792990140
2009-10-01	17.65300961052100
2010-01-01	16.01479915433400
2010-04-01	17.64705882352940
2010-07-01	14.74147414741470
2010-10-01	15.92783505154640
2011-01-01	17.91878172588830
2011-04-01	16.81940700808630
2011-07-01	15.80962800875270
2011-10-01	17.00051361068310
2012-01-01	18.04358844399390
2012-04-01	15.29790660225440
2012-07-01	16.90743713215620
2012-10-01	16.88102893890680
2013-01-01	15.17904863709250
2013-04-01	14.15094339622640
2013-07-01	14.72658364916080
2013-10-01	14.86952240275730
2014-01-01	14.84220907297830
2014-04-01	12.42908715832900
2014-07-01	11.67095115681230
2014-10-01	14.24619640387280
2015-01-01	14.35711040436170
2015-04-01	12.36714975845410
2015-07-01	14.33430515063170
2015-10-01	13.77272727272730
2016-01-01	13.86666666666670
2016-04-01	11.60425335182620
2016-07-01	13.22992700729930
2016-10-01	13.47305389221560
2017-01-01	12.21470836855450
2017-04-01	13.15669255367750
2017-07-01	12.14740673339400
2017-10-01	11.98968629136230
2018-01-01	12.32758620689660
2018-04-01	12.19184222321830
2018-07-01	10.48951048951050