Quarter	Percent
1986-01-01	88.7820512820513
1986-04-01	87.8471267528182
1986-07-01	87.0793214121962
1986-10-01	87.3089944185195
1987-01-01	87.8182315904736
1987-04-01	86.7626948673534
1987-07-01	86.5507193589510
1987-10-01	86.6563720592243
1988-01-01	85.8956916099773
1988-04-01	84.8484848484848
1988-07-01	83.7038381272117
1988-10-01	84.7443799854967
1989-01-01	84.6321130844509
1989-04-01	83.4587829872132
1989-07-01	82.7758136161726
1989-10-01	83.5005876503029
1990-01-01	83.4534967555876
1990-04-01	83.1938821412506
1990-07-01	82.4384988328246
1990-10-01	83.7716943997137
1991-01-01	83.4581105169340
1991-04-01	82.7420645505468
1991-07-01	82.5079872204473
1991-10-01	83.2477876106195
1992-01-01	83.4318482576092
1992-04-01	82.3487983097104
1992-07-01	81.6048514677448
1992-10-01	82.5385694249649
1993-01-01	82.7929738704885
1993-04-01	82.4642483432159
1993-07-01	81.7161256635628
1993-10-01	83.3911535125759
1994-01-01	83.1864523932953
1994-04-01	82.9585594899630
1994-07-01	82.6460481099656
1994-10-01	83.6556563409208
1995-01-01	83.8602471239881
1995-04-01	83.1493120434856
1995-07-01	83.1330399458362
1995-10-01	84.4871147043962
1996-01-01	84.3291712058996
1996-04-01	83.3834335337341
1996-07-01	83.6510447015733
1996-10-01	84.3902843405455
1997-01-01	84.1275084647783
1997-04-01	83.6492500412065
1997-07-01	83.4869178871154
1997-10-01	84.5970786148039
1998-01-01	84.3842122502456
1998-04-01	83.2092300139105
1998-07-01	82.5318940137390
1998-10-01	83.2938678860129
1999-01-01	83.5494657858250
1999-04-01	82.3179186037028
1999-07-01	82.3280078252364
1999-10-01	83.7563038880755
2000-01-01	83.4984570407666
2000-04-01	82.2330491270808
2000-07-01	82.6545513548596
2000-10-01	84.0579710144928
2001-01-01	83.6662084579930
2001-04-01	82.5335272257231
2001-07-01	82.7305678614579
2001-10-01	84.1102034278392
2002-01-01	84.9649793059535
2002-04-01	83.2356667722521
2002-07-01	83.3031282010874
2002-10-01	83.9348626007986
2003-01-01	83.7310532452390
2003-04-01	82.3452114091366
2003-07-01	82.4036316072940
2003-10-01	83.3256775378962
2004-01-01	83.3600000000000
2004-04-01	83.2624544349939
2004-07-01	83.1440254429805
2004-10-01	84.8834577958814
2005-01-01	84.7500939496430
2005-04-01	83.5245594300712
2005-07-01	83.9182818229440
2005-10-01	85.2572706935123
2006-01-01	85.5805660797860
2006-04-01	84.5954548819306
2006-07-01	84.3777712089861
2006-10-01	85.3689098547947
2007-01-01	85.4485294117647
2007-04-01	84.3632889999265
2007-07-01	84.5606049482417
2007-10-01	85.2475827717550
2008-01-01	84.1970616183028
2008-04-01	84.3154435925520
2008-07-01	83.7163493105712
2008-10-01	85.0786484124672
2009-01-01	84.0453356582389
2009-04-01	83.9460517728954
2009-07-01	82.6700434153401
2009-10-01	84.0499206463714
2010-01-01	83.4184591036616
2010-04-01	83.1895932154664
2010-07-01	83.0221200804366
2010-10-01	83.5304235648248
2011-01-01	83.7721808815112
2011-04-01	82.8121645796064
2011-07-01	82.7583738906384
2011-10-01	83.7339055793991
2012-01-01	84.1653554570162
2012-04-01	82.4923054899434
2012-07-01	82.1195846759756
2012-10-01	82.1316165951359
2013-01-01	82.3857142857143
2013-04-01	82.2547270781306
2013-07-01	82.5074754378471
2013-10-01	83.8037157849950
2014-01-01	84.1978968169948
2014-04-01	83.5418130709768
2014-07-01	83.0279720279720
2014-10-01	84.5587213342599
2015-01-01	85.1127091688563
2015-04-01	83.8131226382686
2015-07-01	82.8547990155866
2015-10-01	83.9228732432616
2016-01-01	84.5153026830255
2016-04-01	84.4681560520173
2016-07-01	84.7368770323180
2016-10-01	86.0922346110708
2017-01-01	86.3296616837136
2017-04-01	85.0694670928185
2017-07-01	85.2755956631825
2017-10-01	86.2817283472195
2018-01-01	86.2682159594274
2018-04-01	85.6202466926567
2018-07-01	85.2840040753948