Quarter	Percent, Seasonally Adjusted
1999-04-01	51.0861342042654
1999-07-01	51.2983410676031
1999-10-01	51.5235229411943
2000-01-01	51.4742043755700
2000-04-01	51.6294371625079
2000-07-01	52.0965985635703
2000-10-01	51.8450946817205
2001-01-01	51.8735866111839
2001-04-01	51.9375081460583
2001-07-01	51.9691874449948
2001-10-01	52.1343476761477
2002-01-01	51.9995485534613
2002-04-01	52.3346207891378
2002-07-01	52.3359646905039
2002-10-01	52.3145444157726
2003-01-01	52.2315929364677
2003-04-01	52.4239929256568
2003-07-01	52.3147415787832
2003-10-01	52.5492158268118
2004-01-01	52.7675884918461
2004-04-01	52.7257623679356
2004-07-01	52.5470399291099
2004-10-01	52.7220476907682
2005-01-01	53.1172902388608
2005-04-01	53.0105598556174
2005-07-01	53.1283869653303
2005-10-01	52.8154126402599
2006-01-01	53.2295076132415
2006-04-01	53.2255626696985
2006-07-01	53.0721165885214
2006-10-01	53.0043944015246
2007-01-01	52.7470079472011
2007-04-01	52.8097239285250
2007-07-01	52.9367037520292
2007-10-01	53.1995257468258
2008-01-01	53.2467633831145
2008-04-01	53.2898574817002
2008-07-01	53.0476976930630
2008-10-01	52.9133764577137
2009-01-01	52.6998506608614
2009-04-01	52.4208437678491
2009-07-01	52.5308407873117
2009-10-01	52.5261018828429
2010-01-01	52.2171672364663
2010-04-01	52.2646571063641
2010-07-01	52.3452855953474
2010-10-01	52.0250145962410
2011-01-01	52.3010804862179
2011-04-01	52.0846260756953
2011-07-01	51.9757988141548
2011-10-01	51.9502287136236
2012-01-01	51.9247315591344
2012-04-01	52.0552448077413
2012-07-01	52.3347581111281
2012-10-01	52.6557083218384
2013-01-01	52.6291145617561
2013-04-01	52.6471058067022
2013-07-01	52.7804557360323
2013-10-01	53.0151356577276
2014-01-01	53.3212923897648
2014-04-01	53.6548705605940
2014-07-01	53.8403942150180
2014-10-01	54.0015068036774
2015-01-01	54.2127027208147
2015-04-01	54.1428613862059
2015-07-01	54.3068256355006
2015-10-01	54.4014353481761
2016-01-01	54.3944159446731
2016-04-01	54.8113400411355
2016-07-01	54.8813673867063
2016-10-01	55.0583403417369
2017-01-01	55.1706108148469
2017-04-01	55.3400963562953
2017-07-01	55.3286454906469
2017-10-01	55.4435408330412
2018-01-01	55.7197509364117
2018-04-01	55.7157839080290