Quarter	Percent, Seasonally Adjusted
1998-01-01	76.7737870362829
1998-04-01	76.9439426309488
1998-07-01	77.2506936304367
1998-10-01	77.4052964865189
1999-01-01	78.1572796622343
1999-04-01	77.9557140794080
1999-07-01	77.7253630271699
1999-10-01	77.7922676600601
2000-01-01	77.9103582636914
2000-04-01	78.1219463118835
2000-07-01	78.2208211506458
2000-10-01	78.2259446988359
2001-01-01	78.2334062864548
2001-04-01	77.7748457305727
2001-07-01	77.7017063052716
2001-10-01	77.8032093421230
2002-01-01	78.0290728559131
2002-04-01	78.7099996036339
2002-07-01	78.9755214973191
2002-10-01	79.4073255305901
2003-01-01	79.5007814071449
2003-04-01	79.5579250304421
2003-07-01	79.9694764814001
2003-10-01	80.1998432703494
2004-01-01	80.9035562380898
2004-04-01	81.0302318377405
2004-07-01	81.2633266992103
2004-10-01	81.3287344361000
2005-01-01	81.2847636470844
2005-04-01	81.4726006515707
2005-07-01	81.4008958740000
2005-10-01	81.7398870264104
2006-01-01	81.7191801705950
2006-04-01	81.7629190518336
2006-07-01	82.1634526214383
2006-10-01	82.1648689277911
2007-01-01	81.9318769329572
2007-04-01	81.8174665085650
2007-07-01	81.8071364096985
2007-10-01	81.8258550164807
2008-01-01	81.9809182000637
2008-04-01	81.9206045753013
2008-07-01	81.8432343675424
2008-10-01	81.9949274356834
2009-01-01	82.4161415366322
2009-04-01	82.6573770706000
2009-07-01	82.8904487645646
2009-10-01	83.0474353674314
2010-01-01	83.2348853208911
2010-04-01	83.3376169138218
2010-07-01	83.1709363031898
2010-10-01	83.2315713092642
2011-01-01	83.1280496754701
2011-04-01	82.7741317542156
2011-07-01	83.0663692539992
2011-10-01	83.5218824601535
2012-01-01	83.6339346975341
2012-04-01	83.5874562165227
2012-07-01	83.7389283443050
2012-10-01	84.0342885945932
2013-01-01	83.7330590929484
2013-04-01	84.0443426514472
2013-07-01	83.9686696597849
2013-10-01	83.8032551203924
2014-01-01	84.2277616215560
2014-04-01	84.1987579219975
2014-07-01	84.3992960145391
2014-10-01	84.5234805069574
2015-01-01	84.7432999607976
2015-04-01	85.2565568857831
2015-07-01	85.6671583273134
2015-10-01	85.7988528843876
2016-01-01	85.6731915474782
2016-04-01	85.5922128207686
2016-07-01	85.5741094081396
2016-10-01	84.9817388584980
2017-01-01	84.8833813424181
2017-04-01	85.2886852841859
2017-07-01	85.0231196123478
2017-10-01	84.7962379114793
2018-01-01	84.6755244963622
2018-04-01	85.0288907630289