Quarter	Percent, Seasonally Adjusted
1999-01-01	60.8152047907304
1999-04-01	60.2950970815283
1999-07-01	61.0274583379237
1999-10-01	61.6970476770234
2000-01-01	57.6571485259461
2000-04-01	57.8858238129637
2000-07-01	57.1700316231254
2000-10-01	56.4292802919221
2001-01-01	56.2428245488935
2001-04-01	55.6958097497713
2001-07-01	55.8565531765578
2001-10-01	55.3805027976221
2002-01-01	56.6167085807601
2002-04-01	56.0909598304113
2002-07-01	55.4593397848976
2002-10-01	55.9056072027874
2003-01-01	56.0116021123188
2003-04-01	56.6987366868992
2003-07-01	54.9534989733808
2003-10-01	55.2940596770404
2004-01-01	54.4088599178816
2004-04-01	54.2415072076230
2004-07-01	54.3868174721008
2004-10-01	53.9880138236068
2005-01-01	54.4419947451412
2005-04-01	54.5823463355179
2005-07-01	55.1304761629930
2005-10-01	54.8654996736431
2006-01-01	55.3578588239520
2006-04-01	55.3627387078925
2006-07-01	56.3384201777431
2006-10-01	56.0190820347179
2007-01-01	56.6141658224033
2007-04-01	57.3799427289283
2007-07-01	56.9767915082823
2007-10-01	57.1907244977243
2008-01-01	57.7620956261805
2008-04-01	57.9894340502075
2008-07-01	57.7164906038090
2008-10-01	56.8951372485691
2009-01-01	56.1965628222082
2009-04-01	55.1412378155302
2009-07-01	55.6953182673262
2009-10-01	56.2184836229624
2010-01-01	56.0120104979273
2010-04-01	55.3965354559867
2010-07-01	56.1683776168638
2010-10-01	58.8771840269050
2011-01-01	58.2216259794912
2011-04-01	58.0398985217519
2011-07-01	58.6929767435662
2011-10-01	57.2124696609937
2012-01-01	57.7636319512760
2012-04-01	57.7588504244097
2012-07-01	56.6328949238983
2012-10-01	56.2324599931033
2013-01-01	56.4660169454876
2013-04-01	57.1940281388009
2013-07-01	56.1402075409414
2013-10-01	55.9202845598557
2014-01-01	55.4356379041230
2014-04-01	54.0656418974175
2014-07-01	53.7607349089610
2014-10-01	53.7668748835773
2015-01-01	54.3159144266019
2015-04-01	54.1162872171779
2015-07-01	54.2596084410850
2015-10-01	53.1505455385383
2016-01-01	53.4098777468580
2016-04-01	52.2098533242095
2016-07-01	53.0612517478774
2016-10-01	53.0761305731105
2017-01-01	51.9378598918096
2017-04-01	52.0159407146053
2017-07-01	52.0374677668229
2017-10-01	52.5729295141638
2018-01-01	52.0381657682482
2018-04-01	53.7693147611043