Quarter	Percent, Seasonally Adjusted
1998-01-01	60.1941224564147
1998-04-01	59.3282223429376
1998-07-01	60.9572799235905
1998-10-01	61.3560422482522
1999-01-01	61.7579288428483
1999-04-01	63.0452029494826
1999-07-01	62.5781903332316
1999-10-01	62.5343125392782
2000-01-01	62.7255186072320
2000-04-01	63.3202050452903
2000-07-01	63.6340343861842
2000-10-01	63.4006804039977
2001-01-01	63.2091684251966
2001-04-01	63.7284120860620
2001-07-01	63.5482545286248
2001-10-01	64.0759919290207
2002-01-01	64.0579159590964
2002-04-01	64.0671623803743
2002-07-01	64.0884030041548
2002-10-01	63.9575240130416
2003-01-01	64.1374150115593
2003-04-01	63.7223156118308
2003-07-01	63.0281431324424
2003-10-01	62.9732246619912
2004-01-01	62.8199409811089
2004-04-01	63.3323006210494
2004-07-01	63.6219022095313
2004-10-01	63.4952352080979
2005-01-01	64.0941988365344
2005-04-01	64.0013321688227
2005-07-01	64.0655440795620
2005-10-01	64.4610349915672
2006-01-01	64.5655746561833
2006-04-01	64.5001454441907
2006-07-01	64.6272821305696
2006-10-01	64.8645483057848
2007-01-01	65.0095372998591
2007-04-01	64.8174776296796
2007-07-01	65.1659779984415
2007-10-01	65.3370068353014
2008-01-01	65.0427323142082
2008-04-01	65.1226819405523
2008-07-01	65.1459657544455
2008-10-01	65.3175363726113
2009-01-01	65.0561906857896
2009-04-01	64.8937113363229
2009-07-01	64.3674876534424
2009-10-01	64.4928227981193
2010-01-01	63.8139576288091
2010-04-01	63.9884191895823
2010-07-01	63.5120526856949
2010-10-01	63.5575777655108
2011-01-01	63.3877823998745
2011-04-01	63.4885850429652
2011-07-01	63.7401080202008
2011-10-01	63.5142658592963
2012-01-01	63.6838443777170
2012-04-01	63.7245775705449
2012-07-01	64.4194272721991
2012-10-01	63.3923835819347
2013-01-01	63.8045261742426
2013-04-01	63.4323185206052
2013-07-01	62.7500400509004
2013-10-01	63.5753944119938
2014-01-01	63.3142969642763
2014-04-01	63.6624869767352
2014-07-01	63.5393403672990
2014-10-01	63.3890429460912
2015-01-01	63.5926878607728
2015-04-01	63.7424136928302
2015-07-01	63.9035088078615
2015-10-01	63.7156834785522
2016-01-01	63.3410457242554
2016-04-01	62.8490099172955
2016-07-01	63.3265723997365
2016-10-01	63.0409404358352
2017-01-01	63.3325968504913
2017-04-01	63.3914092610307
2017-07-01	63.0723202452140
2017-10-01	64.1894049035737
2018-01-01	64.5353149817721
2018-04-01	64.3469405985510