Quarter	Percent, Seasonally Adjusted
1999-01-01	50.9229354611633
1999-04-01	50.1119893064366
1999-07-01	49.6308262146840
1999-10-01	49.1790778884438
2000-01-01	48.9814569419059
2000-04-01	48.6077119983285
2000-07-01	48.6881165065805
2000-10-01	48.8669748114135
2001-01-01	48.7734345810320
2001-04-01	48.9551738144309
2001-07-01	48.9120984805250
2001-10-01	48.7477258925418
2002-01-01	48.7382858460509
2002-04-01	48.6583809649024
2002-07-01	48.8357209172850
2002-10-01	49.1063673485215
2003-01-01	49.4290049402752
2003-04-01	49.8627999207859
2003-07-01	49.7980329281102
2003-10-01	49.5608095901146
2004-01-01	48.9843450685901
2004-04-01	49.0949890227307
2004-07-01	49.2566237154244
2004-10-01	49.2936637081592
2005-01-01	49.5559468487333
2005-04-01	49.6462646999948
2005-07-01	49.7461310340422
2005-10-01	50.3293695311763
2006-01-01	50.5478177349718
2006-04-01	51.1767957585494
2006-07-01	51.4889393025967
2006-10-01	51.7282487443710
2007-01-01	52.0531146795552
2007-04-01	52.2107431647185
2007-07-01	52.1717517234019
2007-10-01	52.7250709856922
2008-01-01	53.2335493097444
2008-04-01	53.4952552791759
2008-07-01	54.0996069703766
2008-10-01	53.8337615064805
2009-01-01	52.9170850147550
2009-04-01	52.1323085281686
2009-07-01	51.4151812645532
2009-10-01	50.7062496978015
2010-01-01	50.3472097309385
2010-04-01	50.4009551239330
2010-07-01	50.5125568661432
2010-10-01	50.7862743398472
2011-01-01	50.6607296902699
2011-04-01	50.8344016769788
2011-07-01	50.7992907375053
2011-10-01	50.7631545732109
2012-01-01	51.0543490847081
2012-04-01	51.0730051115295
2012-07-01	51.0504842752468
2012-10-01	50.5891732388628
2013-01-01	51.0423629347408
2013-04-01	50.8102743184887
2013-07-01	50.7610828747311
2013-10-01	50.8035357805973
2014-01-01	51.1029011143935
2014-04-01	51.3232160079244
2014-07-01	51.6310479528275
2014-10-01	52.0517367178428
2015-01-01	52.3328312133380
2015-04-01	52.6197576417672
2015-07-01	52.8952095495798
2015-10-01	53.3377804343800
2016-01-01	53.7345290620291
2016-04-01	54.2142038526039
2016-07-01	54.3763571507668
2016-10-01	54.6545676234932
2017-01-01	54.7959947359894
2017-04-01	54.9892586686878
2017-07-01	55.2639550885990
2017-10-01	55.2409498515972
2018-01-01	55.4356630947735
2018-04-01	55.6251974873099