Quarter	Percent, Seasonally Adjusted
1999-01-01	78.3675264846165
1999-04-01	78.3181500231790
1999-07-01	77.9190520819808
1999-10-01	77.5567322572581
2000-01-01	79.2872504753306
2000-04-01	79.2633716148592
2000-07-01	79.3129070550538
2000-10-01	79.2317112775704
2001-01-01	79.6297133002365
2001-04-01	79.7538502686011
2001-07-01	80.2730858638363
2001-10-01	80.6773813337077
2002-01-01	80.2351367742655
2002-04-01	80.7297750076892
2002-07-01	80.5334095136592
2002-10-01	78.4868081836706
2003-01-01	79.1115655067209
2003-04-01	79.1685313292354
2003-07-01	79.2106851284154
2003-10-01	79.5482532495980
2004-01-01	80.1792202844972
2004-04-01	81.4008969393185
2004-07-01	81.9003222985693
2004-10-01	81.3130711560091
2005-01-01	81.2362560522681
2005-04-01	81.3429269794666
2005-07-01	80.7933928713922
2005-10-01	80.9406229620963
2006-01-01	81.2490209829379
2006-04-01	82.1897240109337
2006-07-01	80.7543209969889
2006-10-01	80.8069624679184
2007-01-01	81.4711650984402
2007-04-01	82.6434431628340
2007-07-01	82.2433038446475
2007-10-01	83.2429694696388
2008-01-01	83.7469017051118
2008-04-01	84.5427555851122
2008-07-01	84.9828001663051
2008-10-01	85.8803335836098
2009-01-01	84.5438679640940
2009-04-01	83.1974163701104
2009-07-01	82.4524856559888
2009-10-01	82.6417026200631
2010-01-01	82.5274723875526
2010-04-01	82.9492083797115
2010-07-01	80.9655387231682
2010-10-01	81.9333094350447
2011-01-01	81.7499691876105
2011-04-01	82.0168554891690
2011-07-01	80.9879554399493
2011-10-01	80.5969361644324
2012-01-01	82.4065341723495
2012-04-01	80.8785065406541
2012-07-01	80.6776722383328
2012-10-01	80.2094305739330
2013-01-01	79.3175098396750
2013-04-01	79.3068222013574
2013-07-01	79.2178956239198
2013-10-01	79.3885252295984
2014-01-01	79.6212884851008
2014-04-01	79.5580298058445
2014-07-01	78.6016474909592
2014-10-01	78.4302222015808
2015-01-01	78.9981202562893
2015-04-01	78.9187823974776
2015-07-01	79.7766993605004
2015-10-01	80.4696568695637
2016-01-01	79.7474440776754
2016-04-01	81.3466881285385
2016-07-01	81.3202051397130
2016-10-01	82.3350863624877
2017-01-01	82.3934523478245
2017-04-01	82.8865242914107
2017-07-01	84.0481738208754
2017-10-01	84.8535650936044
2018-01-01	84.1314444667607
2018-04-01	84.4245193550072