Quarter	Percent, Seasonally Adjusted
1999-01-01	54.1514113298109
1999-04-01	53.8420342807143
1999-07-01	54.9299700675122
1999-10-01	55.8459922026602
2000-01-01	51.2174824539427
2000-04-01	50.7500095987665
2000-07-01	50.6122732766879
2000-10-01	49.6063054309057
2001-01-01	49.7719472944059
2001-04-01	49.8654149152551
2001-07-01	49.1651849316372
2001-10-01	50.1661900923265
2002-01-01	50.7851380569030
2002-04-01	50.0341508064050
2002-07-01	50.0346454017278
2002-10-01	50.2428961352607
2003-01-01	49.8985093460992
2003-04-01	50.1624706460140
2003-07-01	49.5451758754238
2003-10-01	49.4852651906838
2004-01-01	51.7189402234626
2004-04-01	52.7796089032489
2004-07-01	53.5623936841238
2004-10-01	53.8128814504434
2005-01-01	54.0825690304448
2005-04-01	54.1314374101982
2005-07-01	54.1496024286060
2005-10-01	54.0407975118548
2006-01-01	53.2107789182368
2006-04-01	54.0860449977808
2006-07-01	54.3611350255166
2006-10-01	54.6373275873923
2007-01-01	55.6214333170717
2007-04-01	56.3433916559580
2007-07-01	56.6575658775954
2007-10-01	55.4563403180689
2008-01-01	55.8108717884289
2008-04-01	55.5496853567213
2008-07-01	55.5665130521810
2008-10-01	57.7129096187033
2009-01-01	56.2822911169948
2009-04-01	56.9702944544772
2009-07-01	56.8674132681072
2009-10-01	54.6361782082346
2010-01-01	53.7008933126250
2010-04-01	53.9163554975082
2010-07-01	54.0164041075071
2010-10-01	54.3088428206199
2011-01-01	55.5808234321084
2011-04-01	54.8632750695546
2011-07-01	54.1983043122008
2011-10-01	54.5722704316942
2012-01-01	55.2011396889482
2012-04-01	54.5530424266555
2012-07-01	55.7905224824561
2012-10-01	55.9531427865511
2013-01-01	54.9012751891699
2013-04-01	55.5505219009983
2013-07-01	55.6974112233086
2013-10-01	55.0001124839515
2014-01-01	55.9264096963467
2014-04-01	55.8598076815507
2014-07-01	53.9727785315153
2014-10-01	55.7089635921387
2015-01-01	53.9981412587830
2015-04-01	54.1323615852844
2015-07-01	54.5583132858851
2015-10-01	53.8695894737792
2016-01-01	54.6583201731794
2016-04-01	53.7240309345577
2016-07-01	55.5189897156947
2016-10-01	54.4431544166802
2017-01-01	54.1681035175858
2017-04-01	54.4805624431683
2017-07-01	52.9749262717124
2017-10-01	53.1951677386057
2018-01-01	52.9649208080735
2018-04-01	52.9528751779305