Quarter	Percent, Seasonally Adjusted
1999-01-01	81.7398984323250
1999-04-01	82.6935731520070
1999-07-01	83.1977127776556
1999-10-01	85.0220264317181
2000-01-01	81.0793377768222
2000-04-01	82.1973769081918
2000-07-01	83.2509137819824
2000-10-01	81.3588475596646
2001-01-01	81.6659510519536
2001-04-01	80.6998711893516
2001-07-01	82.0914751986257
2001-10-01	80.3993130098755
2002-01-01	80.6451612903226
2002-04-01	80.3368421052632
2002-07-01	79.4406178250887
2002-10-01	79.1347547091699
2003-01-01	79.8441664957966
2003-04-01	77.2893772893773
2003-07-01	78.1825541388383
2003-10-01	77.7621251760918
2004-01-01	81.9223808566258
2004-04-01	81.4874371859296
2004-07-01	81.5869170199879
2004-10-01	79.7887466991672
2005-01-01	79.2526036348785
2005-04-01	77.6018099547511
2005-07-01	76.3745349317900
2005-10-01	76.9310631229236
2006-01-01	75.7077435470441
2006-04-01	75.0625521267723
2006-07-01	74.9161777032691
2006-10-01	73.6675795239098
2007-01-01	73.1289640591966
2007-04-01	72.9461457233369
2007-07-01	72.4683544303798
2007-10-01	71.5882725163468
2008-01-01	70.3961230509903
2008-04-01	70.5314009661836
2008-07-01	69.1580936384632
2008-10-01	69.6855345911950
2009-01-01	69.6499685600503
2009-04-01	69.4112717368531
2009-07-01	68.9590301003344
2009-10-01	67.6894176581090
2010-01-01	66.3129421556388
2010-04-01	66.1770790235830
2010-07-01	65.5603359967220
2010-10-01	67.4791793621775
2011-01-01	66.9012668409411
2011-04-01	66.6732869910626
2011-07-01	66.8111089225921
2011-10-01	67.5426554226319
2012-01-01	66.6862399686827
2012-04-01	65.2148437500000
2012-07-01	65.3180315113791
2012-10-01	64.8475432122742
2013-01-01	64.8140975987606
2013-04-01	63.0401234567901
2013-07-01	63.3448540706605
2013-10-01	63.3614088820827
2014-01-01	64.1045203127980
2014-04-01	62.2272813507873
2014-07-01	62.0214972656987
2014-10-01	61.8270493340837
2015-01-01	61.2374207976146
2015-04-01	59.5894211207694
2015-07-01	59.4678899082569
2015-10-01	58.9467930029154
2016-01-01	58.7393588118094
2016-04-01	56.7247261626863
2016-07-01	56.8606513614522
2016-10-01	56.8149717514124
2017-01-01	56.6725043782837
2017-04-01	56.1534455823642
2017-07-01	54.8837209302326
2017-10-01	54.4600136705400
2018-01-01	53.7300779925398
2018-04-01	54.3270038648967