Quarter	Percent, Seasonally Adjusted
1999-01-01	52.9722606292467
1999-04-01	53.5213849497873
1999-07-01	54.1021146666367
1999-10-01	54.7698389963457
2000-01-01	55.4599026760436
2000-04-01	56.0194105694320
2000-07-01	56.5106791155094
2000-10-01	57.0273048161075
2001-01-01	57.4489288915556
2001-04-01	57.5905763033356
2001-07-01	57.9875952179116
2001-10-01	58.2338599210459
2002-01-01	58.5622348751533
2002-04-01	58.8744820935181
2002-07-01	59.0059330953288
2002-10-01	59.2925048631447
2003-01-01	59.5793152901004
2003-04-01	59.9650858291990
2003-07-01	60.3925133691694
2003-10-01	60.7241167398013
2004-01-01	60.8382286447782
2004-04-01	60.9897230820871
2004-07-01	61.4630009166761
2004-10-01	62.0158904508421
2005-01-01	62.7107264862547
2005-04-01	63.4511453413148
2005-07-01	63.9184957904053
2005-10-01	64.2276568317712
2006-01-01	64.6641400516339
2006-04-01	64.9161590268737
2006-07-01	65.0909202289833
2006-10-01	65.4663871470780
2007-01-01	65.6838567941894
2007-04-01	65.9294958638303
2007-07-01	65.8960484422011
2007-10-01	65.7461419514475
2008-01-01	65.5903005706284
2008-04-01	65.0634432898184
2008-07-01	64.3280052665390
2008-10-01	62.9586880060690
2009-01-01	61.0124476608598
2009-04-01	60.0954404062752
2009-07-01	59.5420885838614
2009-10-01	59.1921265385182
2010-01-01	59.0896731446188
2010-04-01	58.8124845279543
2010-07-01	58.7492875941013
2010-10-01	58.7016050434778
2011-01-01	58.5037079261671
2011-04-01	58.5135084402916
2011-07-01	57.8605317083244
2011-10-01	57.1595776599122
2012-01-01	56.5692123512706
2012-04-01	56.0139848094400
2012-07-01	55.4869735185682
2012-10-01	54.9277852144527
2013-01-01	54.7433574874988
2013-04-01	54.6517091821637
2013-07-01	54.7774273583695
2013-10-01	55.0344547046049
2014-01-01	55.2633294999753
2014-04-01	55.7979060036004
2014-07-01	56.0571876114522
2014-10-01	56.7597214864172
2015-01-01	57.0272262585678
2015-04-01	57.6604966213879
2015-07-01	58.0221408424499
2015-10-01	58.5786335466586
2016-01-01	59.0659290608624
2016-04-01	59.2651208974912
2016-07-01	59.7661412108220
2016-10-01	60.0871120037070
2017-01-01	60.5017975634775
2017-04-01	60.8780831406284
2017-07-01	61.3486843227457
2017-10-01	61.5906747241640
2018-01-01	61.7733275111638
2018-04-01	62.3018726370940
2018-07-01	62.5348800184972