Quarter	Percent, Seasonally Adjusted
1999-01-01	83.2830682351615
1999-04-01	81.7505634406302
1999-07-01	81.2832597869433
1999-10-01	80.5294289800693
2000-01-01	79.9350300140993
2000-04-01	79.6836315483385
2000-07-01	79.5432967199942
2000-10-01	79.3947168810365
2001-01-01	78.8714706843791
2001-04-01	79.0547574417786
2001-07-01	78.8276236876156
2001-10-01	79.1542254068121
2002-01-01	79.5727200091613
2002-04-01	79.0428222765940
2002-07-01	79.3695006088544
2002-10-01	79.8697182773962
2003-01-01	80.0892156043940
2003-04-01	80.8778117318013
2003-07-01	80.7210659347451
2003-10-01	80.2592512222468
2004-01-01	79.5032254584881
2004-04-01	79.9405475587642
2004-07-01	80.1149115007074
2004-10-01	80.3488288103075
2005-01-01	80.5841146796764
2005-04-01	80.8808395711136
2005-07-01	81.5323290900118
2005-10-01	82.4205757751164
2006-01-01	83.3461083504718
2006-04-01	84.1420428045996
2006-07-01	84.3792392534843
2006-10-01	84.6734243595310
2007-01-01	84.6868044139426
2007-04-01	84.8297609713782
2007-07-01	85.2374310195016
2007-10-01	85.4059857083103
2008-01-01	85.5665810402001
2008-04-01	86.0072050721606
2008-07-01	87.2015762033754
2008-10-01	87.0153986453530
2009-01-01	85.9332964276989
2009-04-01	84.9794401140396
2009-07-01	83.6375704179524
2009-10-01	82.2531693344570
2010-01-01	81.2408552122066
2010-04-01	81.0729925435694
2010-07-01	81.2669058483898
2010-10-01	81.9917654369733
2011-01-01	82.0945815074952
2011-04-01	82.3731318339490
2011-07-01	82.6356802250746
2011-10-01	82.8309760216170
2012-01-01	83.3630995189485
2012-04-01	82.9077928907694
2012-07-01	83.1811911624054
2012-10-01	82.4909511682669
2013-01-01	82.9406924665146
2013-04-01	82.3523378367042
2013-07-01	81.7505797461050
2013-10-01	81.8635797164346
2014-01-01	82.4234334275354
2014-04-01	82.5967820937056
2014-07-01	83.5450311049888
2014-10-01	84.2467367847122
2015-01-01	84.1664264627104
2015-04-01	85.1438404991064
2015-07-01	85.4131699367663
2015-10-01	85.7871991996789
2016-01-01	86.1477507487676
2016-04-01	86.4857013392578
2016-07-01	86.4562787740342
2016-10-01	86.2171565871072
2017-01-01	86.1475763354006
2017-04-01	86.3851515750223
2017-07-01	86.4669132384500
2017-10-01	86.3228836864012
2018-01-01	87.1428668184704
2018-04-01	87.5195602612404