Quarter	Percent, Seasonally Adjusted
1999-04-01	49.4392258843573
1999-07-01	49.4828768300112
1999-10-01	49.6281337383284
2000-01-01	49.9771288633055
2000-04-01	50.4615016479804
2000-07-01	51.1593222451829
2000-10-01	51.3304763708310
2001-01-01	51.7392271997107
2001-04-01	52.2074931917108
2001-07-01	52.3191491182362
2001-10-01	52.6820506293236
2002-01-01	52.9229220652232
2002-04-01	53.1956146011220
2002-07-01	53.4406819100207
2002-10-01	54.0269467175417
2003-01-01	54.2676260979151
2003-04-01	55.4295553816967
2003-07-01	55.9484129344216
2003-10-01	55.7628002134163
2004-01-01	55.8879571735983
2004-04-01	56.1503886345481
2004-07-01	56.0121858326402
2004-10-01	56.5289787041226
2005-01-01	56.8296888681190
2005-04-01	56.7810596806889
2005-07-01	56.6623686370172
2005-10-01	56.9750684071986
2006-01-01	56.8691222173928
2006-04-01	57.3170902524422
2006-07-01	57.5872768001339
2006-10-01	57.4798637016464
2007-01-01	57.0090811684996
2007-04-01	57.2808652677457
2007-07-01	57.2246954671918
2007-10-01	57.9568696261649
2008-01-01	57.9707213757402
2008-04-01	58.1501624728242
2008-07-01	57.7350943518086
2008-10-01	57.9795639300387
2009-01-01	57.9385838454016
2009-04-01	57.6018517111506
2009-07-01	57.3959697077426
2009-10-01	57.1490938733019
2010-01-01	57.6566041854595
2010-04-01	56.8894539471772
2010-07-01	57.3020959551421
2010-10-01	56.7711875689586
2011-01-01	56.9797836369605
2011-04-01	56.7320510626416
2011-07-01	56.4780649344174
2011-10-01	56.5479134807003
2012-01-01	57.2977526321744
2012-04-01	58.0098749573142
2012-07-01	58.3207767403456
2012-10-01	58.7260200934101
2013-01-01	58.7749900777211
2013-04-01	59.5975354958522
2013-07-01	60.1780442497256
2013-10-01	60.5958552925435
2014-01-01	60.8793005170434
2014-04-01	60.8321128539583
2014-07-01	60.9016378981331
2014-10-01	61.3157514956222
2015-01-01	61.6684990283762
2015-04-01	61.7533822142514
2015-07-01	62.3095625135720
2015-10-01	63.0386091345392
2016-01-01	62.9062704522916
2016-04-01	63.5509036351348
2016-07-01	63.3985902248139
2016-10-01	63.5938804344708
2017-01-01	63.9827892974466
2017-04-01	64.0422334947187
2017-07-01	63.8881760913482
2017-10-01	64.3776293430248
2018-01-01	64.9989519025798
2018-04-01	65.3159540959450