Quarter	Percent, Seasonally Adjusted
1998-01-01	68.7759262100089
1998-04-01	67.5158132619373
1998-07-01	69.3957728736206
1998-10-01	69.1165200888043
1999-01-01	69.3453703118466
1999-04-01	70.1110986171448
1999-07-01	69.6163313240889
1999-10-01	69.9564159114885
2000-01-01	69.9656071458546
2000-04-01	70.5031604256124
2000-07-01	70.3061233995269
2000-10-01	70.2079164293862
2001-01-01	70.3610018349392
2001-04-01	70.5127062556435
2001-07-01	70.3305247068554
2001-10-01	70.5450093812654
2002-01-01	69.9546461192441
2002-04-01	70.2091768683196
2002-07-01	69.8660746870046
2002-10-01	69.6624758814349
2003-01-01	69.5812344922692
2003-04-01	69.9787441106665
2003-07-01	69.8836485191256
2003-10-01	69.2804873758877
2004-01-01	69.4200672434949
2004-04-01	69.1208668219180
2004-07-01	69.3155718316110
2004-10-01	69.2065549107422
2005-01-01	69.3708199045034
2005-04-01	69.1980521676331
2005-07-01	68.9163162019968
2005-10-01	69.7611593519348
2006-01-01	69.8501854769176
2006-04-01	69.3898522286062
2006-07-01	70.1057898837508
2006-10-01	69.8124169713981
2007-01-01	69.4475467681861
2007-04-01	69.9079409165504
2007-07-01	70.4455647927593
2007-10-01	70.2891415459915
2008-01-01	70.6012414222747
2008-04-01	71.0427814865881
2008-07-01	70.3918895162198
2008-10-01	70.5968273397908
2009-01-01	69.6506726335881
2009-04-01	69.3061683536094
2009-07-01	68.5701673242758
2009-10-01	68.6577124635083
2010-01-01	69.2781977144688
2010-04-01	68.8821609106586
2010-07-01	69.1820740159384
2010-10-01	68.8827625519941
2011-01-01	69.3863834720805
2011-04-01	69.5448030635043
2011-07-01	69.0617340284701
2011-10-01	69.3618790632699
2012-01-01	69.0498897745130
2012-04-01	68.9284912938623
2012-07-01	68.9284177417262
2012-10-01	68.6506761356964
2013-01-01	68.2207180899480
2013-04-01	68.5467619729762
2013-07-01	68.3708154777921
2013-10-01	67.7127130941991
2014-01-01	67.9553841959971
2014-04-01	67.9513519849862
2014-07-01	67.6834906190981
2014-10-01	68.4452643081317
2015-01-01	68.2160876937254
2015-04-01	67.7821295844460
2015-07-01	68.2297342073756
2015-10-01	67.9193170915950
2016-01-01	68.1439835630349
2016-04-01	68.2136861400543
2016-07-01	67.9431501413708
2016-10-01	68.1980883328551
2017-01-01	68.2321771429235
2017-04-01	68.4365394558846
2017-07-01	68.7629305386803
2017-10-01	69.2108236130405
2018-01-01	69.1120522643043
2018-04-01	68.8901128027063