Quarter	Percent, Seasonally Adjusted
1986-01-01	67.2128538633513
1986-04-01	67.9123303496672
1986-07-01	67.9539445282540
1986-10-01	67.5578657636171
1987-01-01	67.8728646570533
1987-04-01	68.8634786248672
1987-07-01	69.1814323591011
1987-10-01	69.5191591712940
1988-01-01	68.1446283356693
1988-04-01	69.0113267388328
1988-07-01	68.9405105015568
1988-10-01	68.6085406804135
1989-01-01	68.2050601705229
1989-04-01	67.7186266033726
1989-07-01	68.4463317258771
1989-10-01	68.5024700550907
1990-01-01	68.2929297235160
1990-04-01	68.9325328524810
1990-07-01	68.9794111020251
1990-10-01	69.6597649595210
1991-01-01	70.0512172788304
1991-04-01	70.2622830848684
1991-07-01	69.8241021283968
1991-10-01	69.3600378095113
1992-01-01	69.8020149630745
1992-04-01	70.4393364772720
1992-07-01	69.5450490776959
1992-10-01	70.3806970819780
1993-01-01	69.3980893514225
1993-04-01	69.9599466359380
1993-07-01	69.7348601292532
1993-10-01	70.1501567990418
1994-01-01	70.5789449073522
1994-04-01	70.5143702161932
1994-07-01	70.5444356780561
1994-10-01	71.5800732175662
1995-01-01	71.0614123791641
1995-04-01	71.6331894237938
1995-07-01	71.8929247046701
1995-10-01	71.5850668158173
1996-01-01	72.2787884121795
1996-04-01	73.0659104083394
1996-07-01	73.7219812285136
1996-10-01	72.6232215727660
1997-01-01	72.0266051818164
1997-04-01	72.4478686036005
1997-07-01	72.6528583944166
1997-10-01	71.9967402228471
1998-01-01	72.2455781812809
1998-04-01	71.8369949975134
1998-07-01	71.9761933822473
1998-10-01	72.7674231871616
1999-01-01	72.6946904479077
1999-04-01	73.1793232882958
1999-07-01	73.1958615936068
1999-10-01	73.7154381302040
2000-01-01	73.6081235335119
2000-04-01	72.6898889902334
2000-07-01	73.6321808869315
2000-10-01	73.8354178840536
2001-01-01	73.9097730425882
2001-04-01	73.8474183705390
2001-07-01	73.8572953170628
2001-10-01	75.1452286188912
2002-01-01	74.7717415912784
2002-04-01	74.0308945123069
2002-07-01	74.5719249362462
2002-10-01	75.2392108585102
2003-01-01	74.0381956287390
2003-04-01	74.0991440761832
2003-07-01	75.0642521431356
2003-10-01	75.0276994023894
2004-01-01	74.8800386510355
2004-04-01	73.8783135134339
2004-07-01	74.9061145003570
2004-10-01	75.6954461228463
2005-01-01	75.5404839790014
2005-04-01	75.7655130650192
2005-07-01	76.5178627484001
2005-10-01	76.0266410709028
2006-01-01	76.2499466951546
2006-04-01	76.7216922405213
2006-07-01	76.5553013561661
2006-10-01	75.4462151105547
2007-01-01	76.5645949278159
2007-04-01	76.5343034481749
2007-07-01	75.7280540992348
2007-10-01	76.9103675676930
2008-01-01	75.6817202241324
2008-04-01	77.1116597562203
2008-07-01	77.9507920147243
2008-10-01	78.0223467067708
2009-01-01	77.5311386521861
2009-04-01	77.4113280826338
2009-07-01	76.9747918506603
2009-10-01	77.2478376699455
2010-01-01	76.7081072699252
2010-04-01	76.3698392277475
2010-07-01	76.2388104084660
2010-10-01	76.4041436182810
2011-01-01	77.3402002940700
2011-04-01	77.4000532203528
2011-07-01	77.2303140848420
2011-10-01	77.6753277735596
2012-01-01	77.4882829826034
2012-04-01	77.3959500110777
2012-07-01	77.5039001379143
2012-10-01	76.7402871494598
2013-01-01	77.7460785356954
2013-04-01	77.2524305233270
2013-07-01	78.4898954010863
2013-10-01	78.9705893676640
2014-01-01	79.0165491460625
2014-04-01	78.0066860586170
2014-07-01	79.5494511397212
2014-10-01	79.4080380508125
2015-01-01	79.5721250766610
2015-04-01	78.9376171130702
2015-07-01	78.2371252525661
2015-10-01	78.6718861874580
2016-01-01	79.2998975116163
2016-04-01	80.1639155827028
2016-07-01	80.6959967560299
2016-10-01	81.7138953832868
2017-01-01	81.7027163182147
2017-04-01	80.7172020396736
2017-07-01	82.0415662370811
2017-10-01	81.9891296357267
2018-01-01	81.9014536917340
2018-04-01	82.4192004307796
2018-07-01	82.1891176656916