Quarter	Percent, Seasonally Adjusted
1999-01-01	81.8084121148302
1999-04-01	81.8218518793231
1999-07-01	81.7715607639350
1999-10-01	81.7567508171694
2000-01-01	82.3173011764683
2000-04-01	82.5652424876257
2000-07-01	82.6111144536115
2000-10-01	82.9460071076984
2001-01-01	82.8533698155160
2001-04-01	82.6571534892504
2001-07-01	82.5667670815714
2001-10-01	82.8563982301892
2002-01-01	83.2309615922901
2002-04-01	83.6804219086906
2002-07-01	83.5486110293804
2002-10-01	83.9520859481234
2003-01-01	84.0646940333434
2003-04-01	84.0168345602922
2003-07-01	84.1938733681660
2003-10-01	83.7962945453473
2004-01-01	81.7186606862300
2004-04-01	81.2194723298690
2004-07-01	81.4486077205901
2004-10-01	81.2349585803435
2005-01-01	81.3925033148385
2005-04-01	81.5346019628158
2005-07-01	81.7538058241396
2005-10-01	81.5963087368978
2006-01-01	81.7242480508224
2006-04-01	82.1657737918368
2006-07-01	82.4416480547444
2006-10-01	82.3608477456721
2007-01-01	82.6581961142688
2007-04-01	82.6545967449234
2007-07-01	83.0547053471580
2007-10-01	83.0777511398860
2008-01-01	83.2166381806767
2008-04-01	83.7198890811016
2008-07-01	83.2465864258598
2008-10-01	83.3628901210394
2009-01-01	83.1619358229121
2009-04-01	82.8903007076426
2009-07-01	82.7319747386187
2009-10-01	82.6958924407241
2010-01-01	82.9625137305619
2010-04-01	83.0818734094258
2010-07-01	83.3552448013841
2010-10-01	83.8835101227101
2011-01-01	83.6806118239098
2011-04-01	84.0011255301544
2011-07-01	84.3350702917476
2011-10-01	84.4270290680699
2012-01-01	84.6831855326066
2012-04-01	84.3690742868321
2012-07-01	84.1537665100810
2012-10-01	84.0946937197780
2013-01-01	84.0544174042651
2013-04-01	84.1170872900186
2013-07-01	84.1194730766524
2013-10-01	83.6823303642294
2014-01-01	83.6282647742188
2014-04-01	83.5258342342262
2014-07-01	83.3245847467269
2014-10-01	83.2418914189790
2015-01-01	83.4138816289437
2015-04-01	83.1929808797913
2015-07-01	83.5003427635689
2015-10-01	83.7232072816949
2016-01-01	83.4749924876338
2016-04-01	83.5016364755344
2016-07-01	83.6359992918520
2016-10-01	83.6774059989550
2017-01-01	83.8408539125689
2017-04-01	84.1673216590195
2017-07-01	84.0427462298124
2017-10-01	84.3811840964796
2018-01-01	84.5929620383846
2018-04-01	84.7881780694259