Quarter	Percent, Seasonally Adjusted
1998-01-01	70.6229932985510
1998-04-01	70.4820450255551
1998-07-01	70.4211531147522
1998-10-01	70.4453799135055
1999-01-01	70.3793336843219
1999-04-01	70.2486139364961
1999-07-01	70.0977765582916
1999-10-01	70.0706346766051
2000-01-01	69.8503740701727
2000-04-01	69.5344039636019
2000-07-01	69.3575719189814
2000-10-01	69.0748276977292
2001-01-01	69.1044245502969
2001-04-01	69.0405390362614
2001-07-01	68.9761486596597
2001-10-01	68.9682113843022
2002-01-01	68.8902733175819
2002-04-01	69.0441100161959
2002-07-01	69.0213630977406
2002-10-01	68.9798349790949
2003-01-01	68.6498668203894
2003-04-01	68.4713657543870
2003-07-01	68.3167109345864
2003-10-01	68.2642435023569
2004-01-01	68.2243796298439
2004-04-01	68.2748030764830
2004-07-01	68.3066330000348
2004-10-01	68.4379708742825
2005-01-01	68.7317069172706
2005-04-01	68.6942797210573
2005-07-01	68.8067904483545
2005-10-01	68.5993534371696
2006-01-01	68.7557403619530
2006-04-01	68.5755981505778
2006-07-01	68.4624156837600
2006-10-01	68.4278381911471
2007-01-01	68.2820086334431
2007-04-01	68.2867896089710
2007-07-01	68.4157799481192
2007-10-01	68.3657912567039
2008-01-01	68.2464485872657
2008-04-01	68.2616266894284
2008-07-01	68.0833202618486
2008-10-01	68.2235140801558
2009-01-01	68.3229355003808
2009-04-01	68.3397160064241
2009-07-01	68.2796461773217
2009-10-01	68.2512213950442
2010-01-01	68.1320032760114
2010-04-01	68.0246496722684
2010-07-01	68.1122477085298
2010-10-01	67.9072814038990
2011-01-01	67.6390644292932
2011-04-01	67.7243444240561
2011-07-01	67.4316528205688
2011-10-01	67.2722478097757
2012-01-01	67.4600965298345
2012-04-01	67.5763074009456
2012-07-01	67.8255687975809
2012-10-01	67.8931509431175
2013-01-01	68.0198390161192
2013-04-01	68.0863775875226
2013-07-01	68.0936966629494
2013-10-01	68.0834487286688
2014-01-01	68.2054464611723
2014-04-01	68.1900769311129
2014-07-01	68.1809286044288
2014-10-01	68.2232777426541
2015-01-01	68.1493686835484
2015-04-01	67.9777232150122
2015-07-01	67.8477151994067
2015-10-01	68.0891023453397
2016-01-01	68.3178932100768
2016-04-01	68.3432410304606
2016-07-01	68.4235854481289
2016-10-01	68.4526643998934
2017-01-01	68.3946094660070
2017-04-01	68.4962746087619
2017-07-01	68.6614966920087
2017-10-01	68.6247040306136
2018-01-01	68.7280862885560
2018-04-01	68.7941285816999