Quarter	Percent, Seasonally Adjusted
1998-01-01	84.4042195677305
1998-04-01	83.9146452010881
1998-07-01	83.4432685076482
1998-10-01	83.0313065057068
1999-01-01	82.4667433092222
1999-04-01	81.9081443520260
1999-07-01	81.7164157195272
1999-10-01	81.5964578231139
2000-01-01	81.3237153554561
2000-04-01	81.4307382111177
2000-07-01	81.6610505862473
2000-10-01	81.8148641907594
2001-01-01	82.3329379217860
2001-04-01	81.9424698439694
2001-07-01	82.0087274256397
2001-10-01	82.1070985059367
2002-01-01	82.3862272893254
2002-04-01	82.5547676647131
2002-07-01	82.6314755934144
2002-10-01	82.4989810933953
2003-01-01	82.3474346370024
2003-04-01	81.8416221231104
2003-07-01	81.2904978709524
2003-10-01	81.1778173523996
2004-01-01	81.0874482418289
2004-04-01	81.2549340449758
2004-07-01	81.5372043303784
2004-10-01	81.6209763917778
2005-01-01	81.6359659558565
2005-04-01	81.9794543190558
2005-07-01	82.2298022831801
2005-10-01	82.1043615948874
2006-01-01	82.3843460651563
2006-04-01	82.5269699556053
2006-07-01	82.5391769531280
2006-10-01	82.7292925642630
2007-01-01	83.1733526076764
2007-04-01	83.4358029177670
2007-07-01	83.5359802048330
2007-10-01	83.6851173173237
2008-01-01	83.9048738329775
2008-04-01	83.8917371898102
2008-07-01	83.8858070488029
2008-10-01	83.6629134903792
2009-01-01	82.9021446221055
2009-04-01	82.3973148418650
2009-07-01	82.1539000761450
2009-10-01	82.4620818771314
2010-01-01	81.7964908638156
2010-04-01	82.2496689386539
2010-07-01	82.3766022620466
2010-10-01	82.2368280330562
2011-01-01	82.4529647406398
2011-04-01	82.7197412213212
2011-07-01	82.9350105274786
2011-10-01	83.1576219323869
2012-01-01	82.7919449250990
2012-04-01	82.9984354353799
2012-07-01	83.0339912271643
2012-10-01	82.9653259189468
2013-01-01	83.1704902772120
2013-04-01	83.7560680390571
2013-07-01	83.4931575652260
2013-10-01	83.6358327060980
2014-01-01	83.6758098412232
2014-04-01	83.6214486414656
2014-07-01	83.8387945516356
2014-10-01	84.0680683775675
2015-01-01	84.1469028713328
2015-04-01	84.4450885185568
2015-07-01	84.6030526721689
2015-10-01	84.8075286798054
2016-01-01	85.4567968804636
2016-04-01	85.6113145367681
2016-07-01	85.6714784129612
2016-10-01	86.1956553174294
2017-01-01	86.1856603206481
2017-04-01	86.4798041903307
2017-07-01	87.0183981955046
2017-10-01	87.0608912738183
2018-01-01	87.1698017085124
2018-04-01	87.5056534986799