Quarter	Percent, Seasonally Adjusted
1998-01-01	77.0243138765598
1998-04-01	76.3132062807746
1998-07-01	75.3875110121028
1998-10-01	75.1195624978953
1999-01-01	74.6307275616583
1999-04-01	74.1912434455373
1999-07-01	74.0284437386971
1999-10-01	74.0348795074309
2000-01-01	73.5613068467757
2000-04-01	73.5785429315401
2000-07-01	73.9747099883391
2000-10-01	73.8016219072713
2001-01-01	74.6017910732866
2001-04-01	74.2562538155642
2001-07-01	74.3970775879489
2001-10-01	74.2738595325001
2002-01-01	74.3777544990648
2002-04-01	74.7345695429006
2002-07-01	74.9245763725949
2002-10-01	74.7924987054760
2003-01-01	74.4673409919353
2003-04-01	73.7847451267721
2003-07-01	72.8535357759736
2003-10-01	72.7810299374895
2004-01-01	72.9814971002035
2004-04-01	73.2891012659242
2004-07-01	73.6017288802425
2004-10-01	73.5784302709448
2005-01-01	73.5386680186359
2005-04-01	73.8415351751643
2005-07-01	74.3492624225293
2005-10-01	74.1118106156806
2006-01-01	74.6647688665402
2006-04-01	74.4797182755662
2006-07-01	74.4057584819096
2006-10-01	74.4717337884624
2007-01-01	74.7568283398442
2007-04-01	74.9664828722887
2007-07-01	75.0579448996194
2007-10-01	74.9159862951314
2008-01-01	75.2028269662379
2008-04-01	75.4198362704039
2008-07-01	75.3735069445268
2008-10-01	74.9457773772086
2009-01-01	74.3098539002164
2009-04-01	74.0242757068025
2009-07-01	73.7577390407323
2009-10-01	74.1466224659399
2010-01-01	73.3092332906140
2010-04-01	73.4107408360645
2010-07-01	73.4786079824541
2010-10-01	73.3880362807843
2011-01-01	73.9931051968249
2011-04-01	74.1301745222416
2011-07-01	74.4626973821116
2011-10-01	74.7943755823056
2012-01-01	74.3028955584150
2012-04-01	74.5050799066761
2012-07-01	74.7914119771901
2012-10-01	74.7858715725796
2013-01-01	75.0551965968711
2013-04-01	75.6605659653950
2013-07-01	75.5418992217867
2013-10-01	75.6887278417656
2014-01-01	75.6335475821471
2014-04-01	75.4847982301768
2014-07-01	75.5844941833110
2014-10-01	76.2692884288755
2015-01-01	76.4410573297665
2015-04-01	76.6471990617616
2015-07-01	76.8344481702679
2015-10-01	77.0326874105549
2016-01-01	77.9912534411952
2016-04-01	78.3027511757486
2016-07-01	78.2924824633830
2016-10-01	79.0170126010694
2017-01-01	78.7476761665184
2017-04-01	79.1526122457698
2017-07-01	79.6969695947728
2017-10-01	79.6145130178657
2018-01-01	79.8686579755802
2018-04-01	80.0016373188369