Quarter	Percent, Seasonally Adjusted
1998-01-01	81.2418907678991
1998-04-01	80.8361344672701
1998-07-01	82.3637651912341
1998-10-01	82.4122705458317
1999-01-01	83.0258320684816
1999-04-01	83.2050168841380
1999-07-01	83.5420212861413
1999-10-01	83.8381497379436
2000-01-01	83.5925069595924
2000-04-01	84.4131005574079
2000-07-01	84.4267532376204
2000-10-01	84.4679670034482
2001-01-01	84.7768498317469
2001-04-01	84.6562627377365
2001-07-01	84.6006708433664
2001-10-01	84.5835604183214
2002-01-01	84.2009802788694
2002-04-01	84.0174865918585
2002-07-01	83.6247662727935
2002-10-01	83.3611185116532
2003-01-01	83.3356691597112
2003-04-01	83.0318992567309
2003-07-01	83.3586537394111
2003-10-01	83.5624738381342
2004-01-01	83.6949120617447
2004-04-01	83.3094880116208
2004-07-01	84.0989586070791
2004-10-01	84.1863824637183
2005-01-01	84.1515695570346
2005-04-01	84.5141426259776
2005-07-01	84.1686851929307
2005-10-01	84.8398187028444
2006-01-01	84.9864945433330
2006-04-01	84.8128715860840
2006-07-01	85.4860770197781
2006-10-01	85.3393265030187
2007-01-01	85.1594468455614
2007-04-01	86.1213387593278
2007-07-01	86.2822004041449
2007-10-01	86.4158214118204
2008-01-01	87.2263186676472
2008-04-01	87.5114161219052
2008-07-01	87.1920007356764
2008-10-01	87.1619297911811
2009-01-01	85.6976671223944
2009-04-01	83.9216935207232
2009-07-01	83.7241991381974
2009-10-01	83.7290971230114
2010-01-01	83.7867819834054
2010-04-01	83.5910790592661
2010-07-01	83.8691182322079
2010-10-01	84.2635899548287
2011-01-01	84.8449150238385
2011-04-01	84.8249637846816
2011-07-01	84.6189829648657
2011-10-01	85.0969343537156
2012-01-01	84.6902587079812
2012-04-01	84.1384880583055
2012-07-01	84.4734280086546
2012-10-01	84.4382412727771
2013-01-01	83.9849993330510
2013-04-01	84.4745875376296
2013-07-01	83.7947096010064
2013-10-01	83.2711339516153
2014-01-01	82.9156478021771
2014-04-01	83.1511290743903
2014-07-01	82.5440486208768
2014-10-01	82.2708493650164
2015-01-01	82.5156490476307
2015-04-01	82.3239343427244
2015-07-01	82.8021610024832
2015-10-01	82.3861058983118
2016-01-01	83.1867085810250
2016-04-01	83.0446613542928
2016-07-01	82.7408739286911
2016-10-01	83.0816776710147
2017-01-01	82.8419929315502
2017-04-01	82.9539727838717
2017-07-01	83.1391933118933
2017-10-01	84.1056511829360
2018-01-01	84.3544130700486
2018-04-01	84.4883931616992