Quarter	Percent, Seasonally Adjusted
1998-01-01	83.5109883288111
1998-04-01	84.0344180525324
1998-07-01	84.3398146171666
1998-10-01	84.2234428899665
1999-01-01	84.5570077186150
1999-04-01	85.1252348522770
1999-07-01	84.5643997566512
1999-10-01	84.7938699513446
2000-01-01	84.5460585649806
2000-04-01	84.7794179833503
2000-07-01	85.4529023219331
2000-10-01	84.8609803729876
2001-01-01	84.6708319202412
2001-04-01	84.9875547202480
2001-07-01	84.6199743649361
2001-10-01	85.5796273548759
2002-01-01	85.7442251645608
2002-04-01	85.5707046818869
2002-07-01	85.2552554354301
2002-10-01	85.2205468038632
2003-01-01	85.2705829703345
2003-04-01	84.8346401121854
2003-07-01	84.0873250602066
2003-10-01	84.8678358046893
2004-01-01	84.2929831720526
2004-04-01	84.5288036110629
2004-07-01	84.8036904849025
2004-10-01	84.5510828061108
2005-01-01	85.3963673230716
2005-04-01	84.9385760084266
2005-07-01	84.8527967749868
2005-10-01	85.0538291780593
2006-01-01	85.5113542823207
2006-04-01	85.2127067902019
2006-07-01	85.4116672173705
2006-10-01	84.9477646363147
2007-01-01	85.6305118058880
2007-04-01	85.3622959350534
2007-07-01	85.5362541241787
2007-10-01	85.8032645647656
2008-01-01	85.8797205160007
2008-04-01	85.9073745637185
2008-07-01	85.8978596418806
2008-10-01	85.7660821073984
2009-01-01	85.7724008939948
2009-04-01	85.5804004353140
2009-07-01	85.6809484514233
2009-10-01	85.8289174382132
2010-01-01	84.9026984398280
2010-04-01	84.7776317640922
2010-07-01	84.0183885217486
2010-10-01	84.0080382079467
2011-01-01	83.8891507284214
2011-04-01	83.7236111779574
2011-07-01	84.6137402612637
2011-10-01	84.9937342128206
2012-01-01	84.3436356028177
2012-04-01	84.0655528325915
2012-07-01	84.7394121153252
2012-10-01	83.3546640480865
2013-01-01	83.5327022376582
2013-04-01	83.3910281115564
2013-07-01	82.9790483557896
2013-10-01	83.3151653735818
2014-01-01	83.4396442219224
2014-04-01	83.6532456876126
2014-07-01	84.0714603719768
2014-10-01	83.2703917805994
2015-01-01	83.4360514881408
2015-04-01	83.6103990416021
2015-07-01	83.7026633186757
2015-10-01	83.6420812735839
2016-01-01	83.0821520267223
2016-04-01	82.7912544066194
2016-07-01	82.8291140984836
2016-10-01	82.3872323429105
2017-01-01	82.9958166632542
2017-04-01	83.6511430445159
2017-07-01	83.2176929987651
2017-10-01	84.5887680542153
2018-01-01	84.4526568546035
2018-04-01	84.6160767337653