Quarter	Percent, Seasonally Adjusted
1999-01-01	62.7002983097156
1999-04-01	63.0346926798643
1999-07-01	63.2235295370822
1999-10-01	62.6207750143071
2000-01-01	64.6281939714331
2000-04-01	63.8960567766178
2000-07-01	62.5787850244454
2000-10-01	63.4634831637379
2001-01-01	63.9068365912341
2001-04-01	63.4159294102766
2001-07-01	64.4776196818494
2001-10-01	65.0279518261678
2002-01-01	64.2740832184566
2002-04-01	64.8685846259269
2002-07-01	63.2988457460520
2002-10-01	64.0239335541941
2003-01-01	62.4084624575004
2003-04-01	63.1478306778536
2003-07-01	63.4424686402938
2003-10-01	63.2696833672335
2004-01-01	63.1951718773644
2004-04-01	64.0256371862480
2004-07-01	64.6948734330266
2004-10-01	63.9269903897445
2005-01-01	64.0009589027881
2005-04-01	63.1543931415005
2005-07-01	63.8684937155045
2005-10-01	65.4795118486062
2006-01-01	65.1189012848466
2006-04-01	64.9147030496446
2006-07-01	65.5520007298586
2006-10-01	65.4281111968877
2007-01-01	65.2902450442587
2007-04-01	65.0564577631844
2007-07-01	64.5957012541555
2007-10-01	64.9913654123704
2008-01-01	65.2615678108072
2008-04-01	65.4735357890223
2008-07-01	65.4010662179198
2008-10-01	65.8909632557567
2009-01-01	65.1669508066070
2009-04-01	64.4340911761854
2009-07-01	64.0003539416515
2009-10-01	62.5765466996187
2010-01-01	62.8533215576092
2010-04-01	62.9589542999152
2010-07-01	62.3408453150288
2010-10-01	61.3427778181356
2011-01-01	61.6371216861042
2011-04-01	61.9328554728248
2011-07-01	61.5426304362589
2011-10-01	60.9994504164593
2012-01-01	61.2332654992296
2012-04-01	61.1868862989273
2012-07-01	60.8676729455619
2012-10-01	60.5026628611836
2013-01-01	60.3939933261744
2013-04-01	60.7810224486939
2013-07-01	61.0603596584771
2013-10-01	60.1944657247990
2014-01-01	59.5504087930402
2014-04-01	59.9636894389620
2014-07-01	60.7619389749243
2014-10-01	61.3964812358467
2015-01-01	61.0070909605200
2015-04-01	60.1886367371299
2015-07-01	60.0023871901719
2015-10-01	60.7392371578075
2016-01-01	62.6058760944769
2016-04-01	62.6807519916660
2016-07-01	61.6196529367764
2016-10-01	61.6891534585172
2017-01-01	61.4647402178376
2017-04-01	61.1662627601488
2017-07-01	61.7140606906815
2017-10-01	61.6388828579357
2018-01-01	62.3286342611904
2018-04-01	62.5784471755780