Quarter	Percent, Seasonally Adjusted
1998-01-01	61.1271470802610
1998-04-01	59.9550186676508
1998-07-01	61.6146789020285
1998-10-01	62.0233165079493
1999-01-01	62.2779325209852
1999-04-01	63.3963089128143
1999-07-01	63.0075229945545
1999-10-01	63.1214564752002
2000-01-01	63.0961182417776
2000-04-01	64.1217557194211
2000-07-01	64.1402582369266
2000-10-01	64.0973041471555
2001-01-01	64.4445248794302
2001-04-01	64.4713230970861
2001-07-01	64.1887205890508
2001-10-01	64.3415515785470
2002-01-01	63.8304415503011
2002-04-01	63.7039633237976
2002-07-01	63.2830164847895
2002-10-01	63.3614018726401
2003-01-01	63.2712438059997
2003-04-01	63.2865618344244
2003-07-01	63.5246717701892
2003-10-01	63.0808190510629
2004-01-01	63.2143982504884
2004-04-01	63.0077605703428
2004-07-01	63.3652587551959
2004-10-01	63.2839227727525
2005-01-01	63.4136562229559
2005-04-01	63.4242679924153
2005-07-01	63.4492474614190
2005-10-01	64.3126816151364
2006-01-01	64.4596693166850
2006-04-01	64.0781950503766
2006-07-01	64.9983696018899
2006-10-01	65.0227104651319
2007-01-01	64.6625662983352
2007-04-01	65.4008754527551
2007-07-01	65.8807093997722
2007-10-01	65.8388129155989
2008-01-01	66.4462771754045
2008-04-01	66.6484784356011
2008-07-01	66.2269968331133
2008-10-01	66.1533777670956
2009-01-01	64.3309302970859
2009-04-01	62.8745154316941
2009-07-01	62.3125287072499
2009-10-01	62.1251485286803
2010-01-01	62.6195913577461
2010-04-01	62.6020539962245
2010-07-01	62.9428962038736
2010-10-01	62.9393460023937
2011-01-01	63.4797681124451
2011-04-01	63.7614890625074
2011-07-01	63.1867845583113
2011-10-01	63.6162444328286
2012-01-01	63.4958231391797
2012-04-01	63.2360933178224
2012-07-01	63.0482479531399
2012-10-01	62.9562084089875
2013-01-01	62.1823531840482
2013-04-01	62.4268022232788
2013-07-01	62.3474514897928
2013-10-01	61.8162333867879
2014-01-01	61.8480385419940
2014-04-01	61.7610730553562
2014-07-01	61.3528542938331
2014-10-01	61.7034493300609
2015-01-01	61.6332368521191
2015-04-01	61.0524876824200
2015-07-01	61.3844520332210
2015-10-01	61.2026731044777
2016-01-01	61.7427886276241
2016-04-01	62.0902941974480
2016-07-01	61.9448313503306
2016-10-01	62.0951112002506
2017-01-01	62.0143044295443
2017-04-01	62.2977907188548
2017-07-01	62.7123454797838
2017-10-01	63.2520749066641
2018-01-01	63.5715274088935
2018-04-01	63.7353466012813