Quarter	Percent, Seasonally Adjusted
1998-01-01	44.0683907390490
1998-04-01	45.3550328912734
1998-07-01	44.7519613915774
1998-10-01	44.8412954867041
1999-01-01	45.1487243448482
1999-04-01	45.3708008971473
1999-07-01	43.6447150142517
1999-10-01	44.7015702471241
2000-01-01	46.0932070466724
2000-04-01	46.4266621287876
2000-07-01	47.8288561168079
2000-10-01	48.7546689202863
2001-01-01	50.5349839750437
2001-04-01	50.6097283106478
2001-07-01	51.9698652635458
2001-10-01	52.1596909202989
2002-01-01	51.5617516858387
2002-04-01	52.6382617541287
2002-07-01	54.1707668591064
2002-10-01	53.5500595340502
2003-01-01	53.3335668645125
2003-04-01	55.5033170364117
2003-07-01	57.2200446090605
2003-10-01	55.1515536033392
2004-01-01	55.2079564536636
2004-04-01	57.0431412396462
2004-07-01	54.9636175342535
2004-10-01	55.0664996444085
2005-01-01	56.4000768231835
2005-04-01	56.2833635085502
2005-07-01	56.9542186697002
2005-10-01	57.9229046744972
2006-01-01	58.2769588612211
2006-04-01	58.8614329418193
2006-07-01	58.6981331677963
2006-10-01	59.5468172691110
2007-01-01	58.6538005889405
2007-04-01	58.9203125161634
2007-07-01	59.8060344498156
2007-10-01	59.0769128978910
2008-01-01	59.7180392232239
2008-04-01	61.0546501679964
2008-07-01	60.8998824923127
2008-10-01	60.6744954480376
2009-01-01	58.9068509877492
2009-04-01	59.1798771723398
2009-07-01	58.9146593935809
2009-10-01	57.9040356898257
2010-01-01	59.8230781531088
2010-04-01	59.9900425904240
2010-07-01	59.9899367145446
2010-10-01	60.4331316983162
2011-01-01	60.8096248144939
2011-04-01	61.6531568614603
2011-07-01	60.8079346133143
2011-10-01	62.2437310699114
2012-01-01	60.9147759066293
2012-04-01	62.5076145264334
2012-07-01	61.1934693062489
2012-10-01	61.8382361565233
2013-01-01	61.7672750245151
2013-04-01	62.0229560717193
2013-07-01	61.5896485063424
2013-10-01	60.5639662342726
2014-01-01	61.8145895246277
2014-04-01	60.9736011450239
2014-07-01	61.7533780195061
2014-10-01	63.1657398798774
2015-01-01	62.3708598434890
2015-04-01	62.1666655537048
2015-07-01	63.7074806493928
2015-10-01	64.5009707089002
2016-01-01	63.3986308406582
2016-04-01	65.3075146697818
2016-07-01	66.3993527156574
2016-10-01	65.4328832712711
2017-01-01	65.3425161473358
2017-04-01	67.7161470561897
2017-07-01	67.5832356260200
2017-10-01	69.4119663443591
2018-01-01	69.4566054830766
2018-04-01	69.7557543208782