Quarter	Percent, Seasonally Adjusted
1999-01-01	85.0449608094610
1999-04-01	85.0752180797740
1999-07-01	84.7359799254969
1999-10-01	84.7511976357534
2000-01-01	83.8135148291663
2000-04-01	84.0929160098133
2000-07-01	84.2829707497863
2000-10-01	84.7159195805194
2001-01-01	83.6888754937610
2001-04-01	83.3150415979885
2001-07-01	83.8471598150819
2001-10-01	84.3132919673852
2002-01-01	83.4695392674520
2002-04-01	83.8711421175492
2002-07-01	83.8023865360170
2002-10-01	83.2607721110164
2003-01-01	83.7500252162055
2003-04-01	84.0389386280846
2003-07-01	84.0146918000781
2003-10-01	83.2295429573298
2004-01-01	84.0266603295743
2004-04-01	84.2559343578447
2004-07-01	84.6543446743160
2004-10-01	83.2394669570739
2005-01-01	84.3371809478526
2005-04-01	83.6360770748576
2005-07-01	83.1120813135677
2005-10-01	83.3621996112012
2006-01-01	83.7406661401801
2006-04-01	83.4720128602582
2006-07-01	84.2114176989618
2006-10-01	84.8907523406349
2007-01-01	84.6047762626818
2007-04-01	83.8882856678568
2007-07-01	83.1514344838199
2007-10-01	83.1541680808509
2008-01-01	83.3825927550940
2008-04-01	84.4635024289792
2008-07-01	84.8691602437967
2008-10-01	84.5385876004762
2009-01-01	84.2230872956648
2009-04-01	83.7865076265940
2009-07-01	83.6926723357705
2009-10-01	82.7853308044025
2010-01-01	83.2474527037720
2010-04-01	82.7510700677281
2010-07-01	81.8333696695220
2010-10-01	82.6880406226927
2011-01-01	82.6680722167327
2011-04-01	82.3298074457256
2011-07-01	82.0931429717572
2011-10-01	82.2403063538353
2012-01-01	82.0080241767719
2012-04-01	81.6859775115322
2012-07-01	80.7989917819046
2012-10-01	81.2978323183435
2013-01-01	81.6489293610789
2013-04-01	80.5704092809118
2013-07-01	80.2475813849398
2013-10-01	79.9065847939582
2014-01-01	80.5032626757316
2014-04-01	80.6564822073606
2014-07-01	81.7756879668319
2014-10-01	81.4703863501423
2015-01-01	81.4379764741227
2015-04-01	81.5955652830216
2015-07-01	81.3888296507781
2015-10-01	81.8935009689950
2016-01-01	82.3812182491154
2016-04-01	82.8083485162390
2016-07-01	82.7953034543054
2016-10-01	82.5505624385716
2017-01-01	81.4582259119421
2017-04-01	81.4226296189588
2017-07-01	81.5468826976440
2017-10-01	81.6894557010022
2018-01-01	81.2840422740234
2018-04-01	82.2828462964076