Quarter	Percent, Seasonally Adjusted
1999-04-01	64.3030244702898
1999-07-01	63.9029583238989
1999-10-01	64.4954783479448
2000-01-01	65.0025124337335
2000-04-01	64.5994570247006
2000-07-01	64.9706165226024
2000-10-01	65.3259511892724
2001-01-01	65.8277653930464
2001-04-01	66.3814129534276
2001-07-01	66.4451332905048
2001-10-01	66.9021587125594
2002-01-01	66.5430094591279
2002-04-01	66.6025772720228
2002-07-01	66.8478143330872
2002-10-01	66.7248630833950
2003-01-01	66.2727454438736
2003-04-01	66.4713931487427
2003-07-01	66.0963070676632
2003-10-01	66.5364111298771
2004-01-01	67.5230319736541
2004-04-01	66.5504735484760
2004-07-01	66.3233538477306
2004-10-01	67.0551929208189
2005-01-01	67.5245405559686
2005-04-01	67.7537787925421
2005-07-01	67.9918441640236
2005-10-01	67.6023263298388
2006-01-01	68.6393231869339
2006-04-01	68.3284130648389
2006-07-01	68.4921436597771
2006-10-01	68.8903556381404
2007-01-01	69.0841031595549
2007-04-01	69.3613981900538
2007-07-01	69.7724605665356
2007-10-01	68.6374291583332
2008-01-01	68.7181752039012
2008-04-01	68.3687756977514
2008-07-01	68.2964472663044
2008-10-01	68.4241744166366
2009-01-01	66.8288157901900
2009-04-01	66.3561066316482
2009-07-01	65.3309715646667
2009-10-01	63.8740113947036
2010-01-01	64.0448423466885
2010-04-01	64.1874235202894
2010-07-01	64.5543774596708
2010-10-01	64.1203840437701
2011-01-01	63.7163316671629
2011-04-01	64.3841652766008
2011-07-01	63.7883880016308
2011-10-01	63.9090065337445
2012-01-01	62.9513168652587
2012-04-01	63.5735460626368
2012-07-01	63.2975469775042
2012-10-01	64.1905755958061
2013-01-01	65.6414832071670
2013-04-01	65.7690760277200
2013-07-01	66.8800569486477
2013-10-01	68.6578437052334
2014-01-01	67.7470646537063
2014-04-01	67.2175166836554
2014-07-01	68.5840629828158
2014-10-01	68.3344722405902
2015-01-01	69.6969979080068
2015-04-01	70.7406122361882
2015-07-01	70.5864296085853
2015-10-01	71.5857244858677
2016-01-01	70.6182205765936
2016-04-01	70.8210804353382
2016-07-01	69.9732985561675
2016-10-01	70.2926478444408
2017-01-01	70.4116064641121
2017-04-01	70.7471156057963
2017-07-01	71.9665354101913
2017-10-01	70.3460158425436
2018-01-01	71.7626196431919
2018-04-01	72.7271249155333