Quarter	Percent, Seasonally Adjusted
1998-01-01	68.8169381492290
1998-04-01	67.8153949379089
1998-07-01	69.6528958558819
1998-10-01	70.0637165403908
1999-01-01	70.4066524363832
1999-04-01	71.7205294643137
1999-07-01	71.0711724892136
1999-10-01	71.0315935644604
2000-01-01	71.3727050515691
2000-04-01	71.9234647183095
2000-07-01	72.2133277455530
2000-10-01	71.8899298938031
2001-01-01	71.8813624391735
2001-04-01	72.5329894580039
2001-07-01	72.3516946359602
2001-10-01	72.9291105644092
2002-01-01	72.7834646700010
2002-04-01	72.8224822253713
2002-07-01	72.9151810469766
2002-10-01	72.6893881580588
2003-01-01	72.8485692818057
2003-04-01	72.4153415749567
2003-07-01	71.6568873867190
2003-10-01	71.6899270011791
2004-01-01	71.4343736639717
2004-04-01	72.0424322901251
2004-07-01	72.3293359878110
2004-10-01	72.2248771133002
2005-01-01	72.8849241680662
2005-04-01	72.6929709806216
2005-07-01	72.7193641513415
2005-10-01	73.0336261871650
2006-01-01	73.1459135692770
2006-04-01	73.0693665512364
2006-07-01	73.3225805812728
2006-10-01	73.5181997683980
2007-01-01	73.8119298217592
2007-04-01	73.5214868280887
2007-07-01	73.9310597643772
2007-10-01	74.0930095573515
2008-01-01	73.8034020588768
2008-04-01	73.9201376584112
2008-07-01	73.9764644955540
2008-10-01	74.0926116132538
2009-01-01	73.7994049136707
2009-04-01	73.6419177250254
2009-07-01	73.2240411954030
2009-10-01	73.3952868744884
2010-01-01	72.5279679946907
2010-04-01	72.7077134482151
2010-07-01	72.2548016473528
2010-10-01	72.5008259944851
2011-01-01	72.3284434818641
2011-04-01	72.4680199568302
2011-07-01	73.0369967669974
2011-10-01	72.8004528023358
2012-01-01	73.0965853951107
2012-04-01	73.1251092979449
2012-07-01	74.3220070311756
2012-10-01	73.0791391256237
2013-01-01	73.6653983871942
2013-04-01	73.3857358915164
2013-07-01	72.8889634627817
2013-10-01	73.8011092772883
2014-01-01	73.5695153758386
2014-04-01	74.2048879227671
2014-07-01	74.0549664015409
2014-10-01	73.8151840980599
2015-01-01	74.0663256429014
2015-04-01	74.4361576447526
2015-07-01	74.7401674739294
2015-10-01	74.5145461023832
2016-01-01	74.1771264375212
2016-04-01	73.7141641978984
2016-07-01	74.3978992440681
2016-10-01	74.0187130866216
2017-01-01	74.4878984980267
2017-04-01	74.7531958063603
2017-07-01	74.6152471893091
2017-10-01	75.8393701107554
2018-01-01	76.4566650419817
2018-04-01	76.4043928313891