Quarter	Percent, Seasonally Adjusted
1999-01-01	48.7204730383922
1999-04-01	48.7372410334328
1999-07-01	48.7099190947209
1999-10-01	48.1573075744267
2000-01-01	47.9294010247011
2000-04-01	49.3441903272708
2000-07-01	49.1992719525582
2000-10-01	48.4962602621133
2001-01-01	47.8191454345894
2001-04-01	47.5028766702587
2001-07-01	47.3787155868678
2001-10-01	48.0048192843394
2002-01-01	48.3877154287522
2002-04-01	48.3815980290490
2002-07-01	49.1142347180120
2002-10-01	49.0414737521134
2003-01-01	49.2332408952217
2003-04-01	48.8191381829960
2003-07-01	49.0346220883216
2003-10-01	50.2808590029754
2004-01-01	50.1232255995817
2004-04-01	50.4973170634739
2004-07-01	50.7476884148168
2004-10-01	50.9925443470230
2005-01-01	51.7456681746320
2005-04-01	52.1488982837626
2005-07-01	51.5058367035746
2005-10-01	51.7325949277597
2006-01-01	51.5586100676601
2006-04-01	52.0000244141613
2006-07-01	52.2874627010352
2006-10-01	52.6566255219512
2007-01-01	52.6945572162410
2007-04-01	53.2131735684332
2007-07-01	52.5820658631787
2007-10-01	53.9179204409055
2008-01-01	53.8360710502244
2008-04-01	52.9357307215077
2008-07-01	54.1665792972592
2008-10-01	53.3131942057008
2009-01-01	53.8782257774955
2009-04-01	53.6616003006772
2009-07-01	53.6012277543187
2009-10-01	53.7168738520752
2010-01-01	55.1181258260122
2010-04-01	53.7190024949638
2010-07-01	54.2898987426406
2010-10-01	55.1697074406982
2011-01-01	53.1996509936011
2011-04-01	54.3612473836664
2011-07-01	54.1138058394984
2011-10-01	53.7786957300833
2012-01-01	53.3864083788723
2012-04-01	53.6885531898462
2012-07-01	54.2519858125416
2012-10-01	54.6158476627277
2013-01-01	54.2414427563693
2013-04-01	54.5220338712066
2013-07-01	55.5116450457535
2013-10-01	54.5025701905642
2014-01-01	54.6176935130460
2014-04-01	55.2971787501839
2014-07-01	55.4931390655360
2014-10-01	55.2908548732079
2015-01-01	55.4835384166687
2015-04-01	54.6203593705979
2015-07-01	54.7935252518777
2015-10-01	55.3428855264460
2016-01-01	54.6191331182003
2016-04-01	54.5265818277358
2016-07-01	54.2605336062224
2016-10-01	55.4798887738561
2017-01-01	54.5644648522000
2017-04-01	54.9998256773423
2017-07-01	54.8615939975149
2017-10-01	55.1584567449015
2018-01-01	55.2712877701358
2018-04-01	55.1175819333770