Quarter	Percent, Seasonally Adjusted
1998-01-01	73.7940121071332
1998-04-01	73.8102697686714
1998-07-01	73.5497941852497
1998-10-01	73.5694811436411
1999-01-01	73.3608127626084
1999-04-01	73.5263335129743
1999-07-01	73.4452900828531
1999-10-01	73.4159743623891
2000-01-01	73.6204459643459
2000-04-01	73.4495846523696
2000-07-01	73.8353759506503
2000-10-01	73.8137815924708
2001-01-01	74.0422264935993
2001-04-01	74.0395111621066
2001-07-01	74.3272166269941
2001-10-01	74.3365689242645
2002-01-01	74.5535744863528
2002-04-01	74.5039634566428
2002-07-01	74.4509073475577
2002-10-01	74.1137213681300
2003-01-01	74.0765418139034
2003-04-01	73.8506072728964
2003-07-01	74.0114219352922
2003-10-01	73.8384086089849
2004-01-01	73.5820101464558
2004-04-01	73.4587869781168
2004-07-01	73.2085679372345
2004-10-01	73.1495162680636
2005-01-01	73.0722163448465
2005-04-01	73.1424374851799
2005-07-01	73.2029533844838
2005-10-01	73.3883986719830
2006-01-01	73.4074810146564
2006-04-01	73.6351337496912
2006-07-01	73.5563249948138
2006-10-01	73.5406723460457
2007-01-01	73.6058584527634
2007-04-01	73.2680846488347
2007-07-01	73.6874149682654
2007-10-01	73.3917330064848
2008-01-01	73.5999013386601
2008-04-01	73.4982135981383
2008-07-01	73.2326252064513
2008-10-01	73.1684451937395
2009-01-01	72.5440313847172
2009-04-01	72.6336237898205
2009-07-01	72.0175123415066
2009-10-01	71.9371654321589
2010-01-01	72.0298802695034
2010-04-01	71.6596169661063
2010-07-01	71.8032098628209
2010-10-01	71.7998146571540
2011-01-01	72.0762289364798
2011-04-01	72.0043508072138
2011-07-01	72.2015592764298
2011-10-01	71.5138031522672
2012-01-01	71.4661485005627
2012-04-01	71.4088882010954
2012-07-01	71.4147483171481
2012-10-01	70.7383519094832
2013-01-01	70.4703167265990
2013-04-01	70.2231196001444
2013-07-01	70.1367531109235
2013-10-01	70.1708050911062
2014-01-01	69.9617764399167
2014-04-01	70.0836688591896
2014-07-01	69.8081788260429
2014-10-01	69.6394339408429
2015-01-01	69.5210199410586
2015-04-01	69.5925540718771
2015-07-01	69.3511177838002
2015-10-01	69.9974472374526
2016-01-01	69.5031013906014
2016-04-01	69.8827133645053
2016-07-01	70.1661146822409
2016-10-01	69.9521992055159
2017-01-01	70.2259617897791
2017-04-01	70.4088374118657
2017-07-01	70.4688484098758
2017-10-01	70.6019971225916
2018-01-01	70.4638349418895
2018-04-01	70.2778818000183