Quarter	Percent, Seasonally Adjusted
1999-01-01	76.0245064134399
1999-04-01	76.3330403756782
1999-07-01	76.3580026828291
1999-10-01	76.1480805873016
2000-01-01	76.9685057851658
2000-04-01	77.8711931991338
2000-07-01	77.8799656168607
2000-10-01	76.7860371429425
2001-01-01	77.0990563959126
2001-04-01	76.5512572401461
2001-07-01	76.4384079464000
2001-10-01	76.4387431664778
2002-01-01	76.5035775367309
2002-04-01	76.5920934022048
2002-07-01	76.7354205469669
2002-10-01	76.3207180838081
2003-01-01	76.1498260638097
2003-04-01	76.1277946864349
2003-07-01	76.5631075799583
2003-10-01	77.1553896243841
2004-01-01	76.7329913363972
2004-04-01	77.3221391471168
2004-07-01	77.0631183105720
2004-10-01	77.8831181301517
2005-01-01	78.2966900073150
2005-04-01	78.2930982306854
2005-07-01	78.4017255526501
2005-10-01	78.2369397591090
2006-01-01	77.2786484323884
2006-04-01	78.1902271912332
2006-07-01	78.8205090991600
2006-10-01	79.1660672116612
2007-01-01	79.3421201008643
2007-04-01	79.2895063739633
2007-07-01	79.8812252619049
2007-10-01	80.2577347329942
2008-01-01	80.6290994477304
2008-04-01	80.5652199333764
2008-07-01	80.5222749254349
2008-10-01	80.1264402012612
2009-01-01	80.5248215589104
2009-04-01	79.6319246896270
2009-07-01	79.3003455198213
2009-10-01	79.6230036494538
2010-01-01	80.2472908491428
2010-04-01	79.5209576337231
2010-07-01	79.4936863775965
2010-10-01	80.7736516164616
2011-01-01	78.7923012112817
2011-04-01	80.0810011358255
2011-07-01	79.2495389228317
2011-10-01	79.2640366909679
2012-01-01	79.0894278314454
2012-04-01	79.0596617317310
2012-07-01	79.6373833667047
2012-10-01	79.2485097243921
2013-01-01	78.8129522810391
2013-04-01	79.3801572319232
2013-07-01	79.2778259194708
2013-10-01	78.6761446076852
2014-01-01	79.4720980850102
2014-04-01	79.1780122927461
2014-07-01	78.8777908224800
2014-10-01	78.9414375260418
2015-01-01	78.8654061736581
2015-04-01	78.1256122686090
2015-07-01	78.7215626965660
2015-10-01	78.4197863148469
2016-01-01	78.2879207799799
2016-04-01	78.6252771134759
2016-07-01	79.0143372160774
2016-10-01	80.3926489819178
2017-01-01	79.1566605168626
2017-04-01	79.7831580249694
2017-07-01	78.9968259174647
2017-10-01	80.1935818753674
2018-01-01	80.2502887776480
2018-04-01	80.0598782961496