Quarter	Percent, Seasonally Adjusted
1998-01-01	53.1557838188440
1998-04-01	53.4454343227665
1998-07-01	52.8770253412176
1998-10-01	53.1575354941229
1999-01-01	53.5056525087508
1999-04-01	53.1821993662682
1999-07-01	53.9456854998741
1999-10-01	53.7237780791631
2000-01-01	52.2966062609846
2000-04-01	51.6111089136765
2000-07-01	52.0028698926521
2000-10-01	51.0912821072470
2001-01-01	51.5539489008144
2001-04-01	52.4018438389670
2001-07-01	52.4064320334726
2001-10-01	53.8093259314449
2002-01-01	55.3884259488674
2002-04-01	56.2394190661949
2002-07-01	58.2920765968822
2002-10-01	58.6926904118168
2003-01-01	58.1413448953294
2003-04-01	57.2769884068171
2003-07-01	57.7569385812912
2003-10-01	56.8312070857415
2004-01-01	56.7430119930204
2004-04-01	56.7279346182064
2004-07-01	57.5272269212847
2004-10-01	57.7613545440522
2005-01-01	59.0370288005370
2005-04-01	59.0619484966773
2005-07-01	60.2166868297186
2005-10-01	59.0517549752810
2006-01-01	60.3634236816325
2006-04-01	59.5361548873605
2006-07-01	59.5345870801729
2006-10-01	58.6375881784849
2007-01-01	59.0035923166236
2007-04-01	58.7529937115156
2007-07-01	60.4229439354218
2007-10-01	60.3074374455992
2008-01-01	61.1815783875996
2008-04-01	61.9116241761114
2008-07-01	62.2353483506044
2008-10-01	62.3856734268553
2009-01-01	61.2463969450300
2009-04-01	60.4976891288716
2009-07-01	58.8062280500657
2009-10-01	58.0143662431196
2010-01-01	57.7542050703918
2010-04-01	58.3685059311984
2010-07-01	58.8529396151116
2010-10-01	58.6053047490534
2011-01-01	58.6813089068246
2011-04-01	59.7813111495728
2011-07-01	58.9904512469512
2011-10-01	58.2080088311653
2012-01-01	58.2339501357941
2012-04-01	59.9652329120105
2012-07-01	61.9410077988531
2012-10-01	61.2143805507952
2013-01-01	61.2346883470677
2013-04-01	62.3958660100883
2013-07-01	63.1448233537037
2013-10-01	63.2474847058128
2014-01-01	63.0943630801927
2014-04-01	64.5962809482961
2014-07-01	65.5375698790529
2014-10-01	66.0155171237226
2015-01-01	64.8513446908069
2015-04-01	65.7176117415588
2015-07-01	65.8044299900879
2015-10-01	65.6883953365507
2016-01-01	66.2969843556531
2016-04-01	67.9089729656091
2016-07-01	68.7257328515377
2016-10-01	69.9493324399300
2017-01-01	70.1022425520259
2017-04-01	71.6047903224402
2017-07-01	71.9883987685580
2017-10-01	72.9765326336954
2018-01-01	73.5314134855200
2018-04-01	74.0364886028212