Quarter	Percent, Seasonally Adjusted
1999-01-01	62.0560544814354
1999-04-01	62.1953256970021
1999-07-01	62.4255123341452
1999-10-01	62.5953780419799
2000-01-01	63.0769980010345
2000-04-01	63.0112385292644
2000-07-01	63.1143192753580
2000-10-01	63.4582956437009
2001-01-01	63.7316361135110
2001-04-01	63.7523777783784
2001-07-01	63.7621790443362
2001-10-01	63.5174750453489
2002-01-01	63.0728528682053
2002-04-01	63.1434452070627
2002-07-01	63.2455657762196
2002-10-01	63.2641759374346
2003-01-01	63.2966680835350
2003-04-01	63.4050960936460
2003-07-01	63.6172166324010
2003-10-01	63.6346633142301
2004-01-01	63.2158841390943
2004-04-01	63.1770174778090
2004-07-01	63.0068389028117
2004-10-01	62.4967052255322
2005-01-01	62.1617015034386
2005-04-01	61.4306521677336
2005-07-01	61.1558555285535
2005-10-01	61.2779453234230
2006-01-01	60.7099414333383
2006-04-01	60.9220287069113
2006-07-01	61.1310737082767
2006-10-01	60.9552139814905
2007-01-01	60.7759631270931
2007-04-01	60.6844212990658
2007-07-01	60.5386273615940
2007-10-01	61.0646457896170
2008-01-01	61.2741226511500
2008-04-01	61.2608785117511
2008-07-01	61.7127866990433
2008-10-01	61.1395088657501
2009-01-01	60.3319034065305
2009-04-01	60.4791692458942
2009-07-01	60.6783843012147
2009-10-01	60.8951987758820
2010-01-01	61.0590812378769
2010-04-01	61.2069563707529
2010-07-01	61.4565609074765
2010-10-01	61.4982912330927
2011-01-01	60.6975866184478
2011-04-01	60.5849996845192
2011-07-01	60.8736050684248
2011-10-01	61.2251525858879
2012-01-01	61.4827111440514
2012-04-01	61.7523865832170
2012-07-01	61.8895140043903
2012-10-01	61.6726534028378
2013-01-01	62.2685106368593
2013-04-01	62.1781320153480
2013-07-01	62.5597102590508
2013-10-01	62.8077894761995
2014-01-01	62.5659430250438
2014-04-01	62.6758957286166
2014-07-01	62.8704290893044
2014-10-01	63.3089652849821
2015-01-01	63.7007208950414
2015-04-01	63.8684247661512
2015-07-01	64.4711405515115
2015-10-01	65.0378861249679
2016-01-01	65.1262161385274
2016-04-01	65.4230315400700
2016-07-01	65.5270410735975
2016-10-01	65.4501086314786
2017-01-01	65.6092731776526
2017-04-01	65.7156085102446
2017-07-01	66.0697534984812
2017-10-01	66.1260902479142
2018-01-01	65.8275160574389
2018-04-01	65.4264090490578