Quarter	Percent, Seasonally Adjusted
1998-01-01	52.4507000555995
1998-04-01	52.9176241450574
1998-07-01	52.6338134041715
1998-10-01	53.2156117984530
1999-01-01	53.5404525520241
1999-04-01	53.7817659545196
1999-07-01	54.0796833769615
1999-10-01	54.0772816663969
2000-01-01	54.5559636835280
2000-04-01	54.6182669786152
2000-07-01	54.9764923051454
2000-10-01	55.1112687150522
2001-01-01	55.4161606005791
2001-04-01	55.2977169835467
2001-07-01	55.4844609133040
2001-10-01	55.8224229774781
2002-01-01	55.7098775212974
2002-04-01	55.7965977046819
2002-07-01	55.8582830086170
2002-10-01	55.2774760686273
2003-01-01	55.8142821841395
2003-04-01	55.4559857512804
2003-07-01	55.4653758808823
2003-10-01	55.3555050055945
2004-01-01	55.3016980118204
2004-04-01	55.3499538286446
2004-07-01	55.4417312081069
2004-10-01	55.7499894771427
2005-01-01	55.4421011888949
2005-04-01	55.7003439995199
2005-07-01	55.7357643733083
2005-10-01	55.7856043330368
2006-01-01	55.6542694354477
2006-04-01	56.0018061402704
2006-07-01	55.9939769028523
2006-10-01	55.6838330945677
2007-01-01	55.7617808039997
2007-04-01	55.6744142828675
2007-07-01	56.3712374554621
2007-10-01	56.2839003653454
2008-01-01	56.4201679329338
2008-04-01	56.8435890277756
2008-07-01	56.6061382462032
2008-10-01	56.3327141108153
2009-01-01	56.2901942629808
2009-04-01	55.6967350602950
2009-07-01	55.3210457219082
2009-10-01	55.6116994686003
2010-01-01	55.6779347709997
2010-04-01	55.2081178581831
2010-07-01	54.7025999070448
2010-10-01	54.6457204827542
2011-01-01	54.1099823404529
2011-04-01	54.2150615742067
2011-07-01	53.4246306313156
2011-10-01	52.8069952342574
2012-01-01	52.7633770837511
2012-04-01	52.5570296466256
2012-07-01	52.3533663967888
2012-10-01	51.2703018173582
2013-01-01	50.8866630404105
2013-04-01	51.0166935197931
2013-07-01	51.6676682306485
2013-10-01	52.2226047468167
2014-01-01	52.3348327672043
2014-04-01	52.4407607245685
2014-07-01	53.0216468301343
2014-10-01	53.0058822745798
2015-01-01	53.1865501771232
2015-04-01	54.1828791879954
2015-07-01	53.9446413471035
2015-10-01	53.9386709209602
2016-01-01	54.1056947576382
2016-04-01	54.1724188711531
2016-07-01	54.9776510293489
2016-10-01	55.2895012222423
2017-01-01	55.6058257577165
2017-04-01	56.1700796061214
2017-07-01	56.7782965524565
2017-10-01	57.2109323938511
2018-01-01	57.7401100157236
2018-04-01	58.2369385120454