Quarter	Percent, Seasonally Adjusted
1999-01-01	52.6853439279888
1999-04-01	53.3142935152567
1999-07-01	53.1750335767049
1999-10-01	53.6605524710771
2000-01-01	53.7020368598693
2000-04-01	54.4409080018787
2000-07-01	53.9463777157230
2000-10-01	53.9568002492983
2001-01-01	54.2324899744657
2001-04-01	53.9838122347303
2001-07-01	54.1809589059478
2001-10-01	55.4238694496570
2002-01-01	55.9789586009973
2002-04-01	56.4213405083152
2002-07-01	57.0430571572874
2002-10-01	57.1445406336246
2003-01-01	58.0344098560549
2003-04-01	58.5945364768773
2003-07-01	59.1032577490793
2003-10-01	59.9538756038148
2004-01-01	59.9176778125520
2004-04-01	60.1245856204457
2004-07-01	60.9730016897329
2004-10-01	61.7730155066356
2005-01-01	62.4255624677998
2005-04-01	63.1568278213028
2005-07-01	64.1046612391080
2005-10-01	63.7306040004308
2006-01-01	64.1321356595906
2006-04-01	64.2950499662221
2006-07-01	64.7376440200640
2006-10-01	65.4543439031386
2007-01-01	65.4717940678376
2007-04-01	65.4375672524575
2007-07-01	65.2474020560784
2007-10-01	65.3427687070754
2008-01-01	65.8927880433529
2008-04-01	67.4246407366230
2008-07-01	68.3420457406225
2008-10-01	68.7792208717144
2009-01-01	69.1124366855568
2009-04-01	69.2922498161344
2009-07-01	68.0712454734480
2009-10-01	67.9287002685003
2010-01-01	69.0605336235959
2010-04-01	69.0609187335161
2010-07-01	68.7434276703725
2010-10-01	68.8500865297909
2011-01-01	69.4637966631035
2011-04-01	69.2212536849697
2011-07-01	70.7713100132796
2011-10-01	70.2625369552842
2012-01-01	69.8778685527570
2012-04-01	69.8839222407363
2012-07-01	68.9800655100792
2012-10-01	69.2914242853654
2013-01-01	68.6592027435858
2013-04-01	68.7323151025208
2013-07-01	69.3506562296778
2013-10-01	70.1822171342777
2014-01-01	69.2659165657862
2014-04-01	69.2140618030334
2014-07-01	68.8437299968909
2014-10-01	68.7739566765565
2015-01-01	67.9416513087013
2015-04-01	68.5625918019987
2015-07-01	68.1165667440588
2015-10-01	68.5045233585215
2016-01-01	68.3741286681955
2016-04-01	68.5481459330467
2016-07-01	67.1901524342359
2016-10-01	66.2275595444914
2017-01-01	66.4145285108929
2017-04-01	66.3936828642738
2017-07-01	67.5557626134153
2017-10-01	66.9167157627878
2018-01-01	67.9086374657910
2018-04-01	67.2119986369829