Quarter	Percent, Seasonally Adjusted
1998-01-01	73.3571039618562
1998-04-01	73.6764147157453
1998-07-01	73.6985907068373
1998-10-01	73.7473778913223
1999-01-01	73.7837234310066
1999-04-01	73.8100661545446
1999-07-01	73.9210628824215
1999-10-01	73.8685808297001
2000-01-01	73.9302263252594
2000-04-01	74.0247061905669
2000-07-01	74.1664222228104
2000-10-01	74.3042361530836
2001-01-01	74.1420417567100
2001-04-01	73.9345225488243
2001-07-01	74.1235471098303
2001-10-01	74.0742850576321
2002-01-01	74.2219281037387
2002-04-01	74.3015847001721
2002-07-01	74.4082311027346
2002-10-01	74.4626766412118
2003-01-01	74.6067107320914
2003-04-01	74.6328268841423
2003-07-01	74.7636335381396
2003-10-01	74.9171937204605
2004-01-01	74.7102213246744
2004-04-01	75.0679550320398
2004-07-01	75.0927776180335
2004-10-01	75.0224055251361
2005-01-01	74.8102689206175
2005-04-01	74.6113316587953
2005-07-01	74.4007499976108
2005-10-01	74.5526797640005
2006-01-01	74.6599805710322
2006-04-01	74.6948780340075
2006-07-01	74.3862534357157
2006-10-01	74.3630934164002
2007-01-01	74.1450476924692
2007-04-01	74.1297656904444
2007-07-01	74.4354263354396
2007-10-01	74.3546883980460
2008-01-01	74.3137372179673
2008-04-01	74.5815195458424
2008-07-01	74.2037906491907
2008-10-01	74.0961881916093
2009-01-01	73.7578664612168
2009-04-01	73.4634009563641
2009-07-01	73.6412204675195
2009-10-01	73.3011413716006
2010-01-01	73.4151068254371
2010-04-01	73.2891911826617
2010-07-01	72.7610219644355
2010-10-01	72.9507518735205
2011-01-01	72.7798401450992
2011-04-01	72.5911627660172
2011-07-01	72.8909654353548
2011-10-01	73.0513724490829
2012-01-01	73.5156679686164
2012-04-01	73.9020069892007
2012-07-01	73.6909893050207
2012-10-01	73.7629157878482
2013-01-01	73.3969006133228
2013-04-01	73.2224799709525
2013-07-01	73.1936708623331
2013-10-01	73.2140293577574
2014-01-01	73.5047836941896
2014-04-01	73.3673922692998
2014-07-01	73.6801426387149
2014-10-01	73.8062833866904
2015-01-01	73.7723362239029
2015-04-01	74.0340786619644
2015-07-01	74.1868033922579
2015-10-01	74.3233025910379
2016-01-01	74.4003494595710
2016-04-01	74.9388654028397
2016-07-01	74.7980246385302
2016-10-01	74.9913830564420
2017-01-01	75.1770560770938
2017-04-01	74.7785212454387
2017-07-01	75.0839123499931
2017-10-01	75.0316592909382
2018-01-01	75.0405530215377
2018-04-01	75.4697083397595