Quarter	Percent, Seasonally Adjusted
1999-01-01	79.1397294593680
1999-04-01	79.1847824039051
1999-07-01	79.5364621374987
1999-10-01	78.8640371670930
2000-01-01	79.7503944307772
2000-04-01	80.1802613884361
2000-07-01	79.2147868250233
2000-10-01	80.1501843306604
2001-01-01	80.3432055142926
2001-04-01	79.9395116653792
2001-07-01	81.2037816834024
2001-10-01	80.8013327073793
2002-01-01	80.7570081779055
2002-04-01	80.6534957481945
2002-07-01	78.8635654563355
2002-10-01	79.1077059963706
2003-01-01	78.8900547386779
2003-04-01	78.7556543662255
2003-07-01	79.1347803780702
2003-10-01	79.1933874355729
2004-01-01	78.1850031059317
2004-04-01	80.4368222526981
2004-07-01	80.8604226325260
2004-10-01	79.7026099757354
2005-01-01	80.0794776269497
2005-04-01	79.9056479123544
2005-07-01	80.7147529117391
2005-10-01	81.8352862272812
2006-01-01	82.1633388035064
2006-04-01	81.5407241983377
2006-07-01	82.2073203628966
2006-10-01	82.1669059509248
2007-01-01	81.9722270193298
2007-04-01	81.5974782408314
2007-07-01	82.1124333330527
2007-10-01	83.4289096292436
2008-01-01	83.7080103686500
2008-04-01	82.9893398797552
2008-07-01	84.0373952371009
2008-10-01	85.1154121241025
2009-01-01	83.7622700868424
2009-04-01	82.6715342910788
2009-07-01	83.0206198744602
2009-10-01	80.5486660407187
2010-01-01	80.7477311103885
2010-04-01	80.6199757253605
2010-07-01	80.4921469127106
2010-10-01	79.2404490288649
2011-01-01	78.3260970260558
2011-04-01	78.6927124105897
2011-07-01	79.3761463468184
2011-10-01	79.0810995071363
2012-01-01	79.3619126531545
2012-04-01	79.2292637764993
2012-07-01	79.1068076372178
2012-10-01	78.6309607164669
2013-01-01	78.5896880121632
2013-04-01	79.4686094158499
2013-07-01	79.4836214083289
2013-10-01	78.4399731404459
2014-01-01	77.5148673657382
2014-04-01	78.6130380716812
2014-07-01	78.6846234922792
2014-10-01	78.8094007081438
2015-01-01	78.5377605659707
2015-04-01	77.5043474251902
2015-07-01	78.4658117200464
2015-10-01	78.7077832682110
2016-01-01	78.8941412078609
2016-04-01	78.4363332191436
2016-07-01	78.3869050367599
2016-10-01	78.3022608862437
2017-01-01	78.1385196763380
2017-04-01	77.4935237573386
2017-07-01	78.5785748207143
2017-10-01	78.2062012625541
2018-01-01	79.0744583064709
2018-04-01	78.8787518020520