Quarter	Percent, Seasonally Adjusted
1998-01-01	57.2206244402113
1998-04-01	57.5813834194376
1998-07-01	57.2896139089584
1998-10-01	57.6762961278026
1999-01-01	57.7913430187228
1999-04-01	57.7306746793364
1999-07-01	57.9719441946735
1999-10-01	58.1397558891245
2000-01-01	58.4173191574735
2000-04-01	58.3866627369185
2000-07-01	58.7807454719867
2000-10-01	58.9956838200801
2001-01-01	59.1134459669732
2001-04-01	58.9751628506123
2001-07-01	59.0791079254678
2001-10-01	59.2223721012658
2002-01-01	59.1919113118703
2002-04-01	59.1198731122930
2002-07-01	59.0373634036164
2002-10-01	58.2635957614212
2003-01-01	58.3047683660784
2003-04-01	58.0621061550950
2003-07-01	58.0627684975372
2003-10-01	57.8849035513161
2004-01-01	57.7102210061102
2004-04-01	57.5194044196916
2004-07-01	57.3982766080490
2004-10-01	57.4439481182864
2005-01-01	57.1651667237188
2005-04-01	57.2171708437030
2005-07-01	57.1283429612325
2005-10-01	57.1848498785987
2006-01-01	57.2699933312502
2006-04-01	57.4802661252966
2006-07-01	57.4910254708111
2006-10-01	57.0693307782026
2007-01-01	57.1497385714856
2007-04-01	57.0291994600262
2007-07-01	57.4896467597846
2007-10-01	57.3867187732107
2008-01-01	57.5287813292805
2008-04-01	57.6227193472115
2008-07-01	57.2626121678466
2008-10-01	56.9944711630270
2009-01-01	56.3445073532096
2009-04-01	55.7455301822522
2009-07-01	55.0685527501076
2009-10-01	55.1241433561023
2010-01-01	55.2791883080664
2010-04-01	54.6622487906642
2010-07-01	54.3505034662032
2010-10-01	54.2553954851066
2011-01-01	53.5242142277618
2011-04-01	53.3413734756409
2011-07-01	52.7864765281897
2011-10-01	51.7136268510891
2012-01-01	51.5512115139493
2012-04-01	51.2286328213374
2012-07-01	50.7506522480061
2012-10-01	49.7354714767141
2013-01-01	49.2506991731384
2013-04-01	49.4082852674267
2013-07-01	49.8545995803088
2013-10-01	50.2982392597053
2014-01-01	50.2276556931945
2014-04-01	50.5771202407689
2014-07-01	51.1014192273888
2014-10-01	50.6986876327206
2015-01-01	50.9009976898554
2015-04-01	51.4156539325761
2015-07-01	51.3294322095067
2015-10-01	51.5698943203468
2016-01-01	51.3288769134666
2016-04-01	51.7120875323107
2016-07-01	52.3778511650445
2016-10-01	52.5287753761998
2017-01-01	52.9511352397579
2017-04-01	53.5589706048588
2017-07-01	54.0492709171665
2017-10-01	54.3552243260302
2018-01-01	54.6005561500987
2018-04-01	54.8925872312522