Quarter	Percent, Seasonally Adjusted
1998-01-01	75.7343309629898
1998-04-01	74.1321767545126
1998-07-01	76.3976804754306
1998-10-01	76.0882011465728
1999-01-01	76.2821174059629
1999-04-01	77.0329390007630
1999-07-01	76.5228301753034
1999-10-01	76.7776486439322
2000-01-01	76.9009713150478
2000-04-01	77.4687375008462
2000-07-01	77.2248142767757
2000-10-01	77.0573655145496
2001-01-01	77.3769529418472
2001-04-01	77.6209933730289
2001-07-01	77.5391537316539
2001-10-01	77.7252350935603
2002-01-01	76.9915003166053
2002-04-01	77.3587193064435
2002-07-01	76.9925963627048
2002-10-01	76.8203767968689
2003-01-01	76.5999164471286
2003-04-01	77.0209486363924
2003-07-01	77.1016141923260
2003-10-01	76.3721967495038
2004-01-01	76.5949373472406
2004-04-01	76.2958635734160
2004-07-01	76.4666190051994
2004-10-01	76.4224467777026
2005-01-01	76.6347165160504
2005-04-01	76.4832079101169
2005-07-01	76.1923267820790
2005-10-01	77.0773528820535
2006-01-01	77.2221395247446
2006-04-01	76.6468859863596
2006-07-01	77.5189015645142
2006-10-01	77.1770916995944
2007-01-01	76.7173203647606
2007-04-01	77.2365151228788
2007-07-01	77.6651512113217
2007-10-01	77.3651394452070
2008-01-01	77.7364120823130
2008-04-01	78.4376995552399
2008-07-01	77.7449329294976
2008-10-01	77.8715954292774
2009-01-01	77.0290322536069
2009-04-01	76.7372065757918
2009-07-01	75.8294812986881
2009-10-01	75.9818161449982
2010-01-01	76.6105051937510
2010-04-01	76.2149259012689
2010-07-01	76.4907457237657
2010-10-01	76.4642732765451
2011-01-01	77.1687851019812
2011-04-01	77.2939089998134
2011-07-01	76.9896856752170
2011-10-01	77.3903085157990
2012-01-01	77.0452921299932
2012-04-01	77.0498207764928
2012-07-01	77.0886751669620
2012-10-01	77.0690116147162
2013-01-01	76.6647031795874
2013-04-01	77.2791120053749
2013-07-01	77.0483307363914
2013-10-01	76.3960799861652
2014-01-01	76.7823288902210
2014-04-01	76.8148166354542
2014-07-01	76.3796148002914
2014-10-01	77.3664289726223
2015-01-01	77.2156379390104
2015-04-01	76.8925101766473
2015-07-01	77.4262580660460
2015-10-01	77.1200495512727
2016-01-01	77.6764669627440
2016-04-01	77.8432579228176
2016-07-01	77.5904400672618
2016-10-01	77.7701899655663
2017-01-01	77.8756372146414
2017-04-01	78.2102968654566
2017-07-01	78.6944758222079
2017-10-01	79.3066784953792
2018-01-01	79.3411130527530
2018-04-01	79.1820529551281