Quarter	Percent, Seasonally Adjusted
1998-01-01	82.2455512519107
1998-04-01	81.9928018384489
1998-07-01	81.5575366221146
1998-10-01	81.7281912794512
1999-01-01	81.9361585859104
1999-04-01	81.9322980653276
1999-07-01	81.9830945150329
1999-10-01	82.0262656737080
2000-01-01	81.9968776236643
2000-04-01	81.8387555209351
2000-07-01	81.7343384200361
2000-10-01	81.5107731004155
2001-01-01	82.1854460437781
2001-04-01	81.7082012769086
2001-07-01	81.8926905568766
2001-10-01	81.4958766236259
2002-01-01	81.3035829745930
2002-04-01	81.4379968016737
2002-07-01	81.5679236847710
2002-10-01	81.6853614562138
2003-01-01	81.4585914029922
2003-04-01	81.3413669880996
2003-07-01	80.6002824788389
2003-10-01	80.6215052014703
2004-01-01	80.7707458460932
2004-04-01	80.7946512635416
2004-07-01	80.9279961678479
2004-10-01	81.0526015095105
2005-01-01	80.9641732417719
2005-04-01	81.6187718200907
2005-07-01	81.8936983685924
2005-10-01	81.8528941053778
2006-01-01	81.8551756543905
2006-04-01	81.3337087367802
2006-07-01	81.0639472897390
2006-10-01	80.8151952035931
2007-01-01	80.7356131964905
2007-04-01	80.3547622123108
2007-07-01	80.0901942096564
2007-10-01	79.9894308079176
2008-01-01	79.7686612507166
2008-04-01	79.6542818841871
2008-07-01	79.5646429701339
2008-10-01	79.2501777754252
2009-01-01	79.3411905838603
2009-04-01	79.8000551178391
2009-07-01	80.1653989135076
2009-10-01	80.3008362583556
2010-01-01	79.9100125441790
2010-04-01	79.7804209430176
2010-07-01	79.7440645306917
2010-10-01	79.6725037205729
2011-01-01	80.0612310488202
2011-04-01	80.3857206658325
2011-07-01	80.4789659417017
2011-10-01	80.7575873012926
2012-01-01	80.4130727926712
2012-04-01	80.6862948300887
2012-07-01	81.2375158864439
2012-10-01	81.2376047243638
2013-01-01	81.5229622634643
2013-04-01	82.1740277749278
2013-07-01	82.0782745069967
2013-10-01	81.9997319755357
2014-01-01	81.8667631136904
2014-04-01	81.3397284568908
2014-07-01	81.2290466357132
2014-10-01	81.8294776132144
2015-01-01	81.7195442531381
2015-04-01	81.3242457672144
2015-07-01	81.3590453505162
2015-10-01	81.3783136695428
2016-01-01	81.7780268469134
2016-04-01	82.0478475759465
2016-07-01	82.0604373850614
2016-10-01	82.3525978194587
2017-01-01	81.9236994475684
2017-04-01	82.1227965508628
2017-07-01	82.4052009175696
2017-10-01	82.0394776016616
2018-01-01	82.0593105392549
2018-04-01	82.1929489380410