Quarter	Percent, Seasonally Adjusted
1998-01-01	79.3948619327226
1998-04-01	79.3507316078954
1998-07-01	79.1904888426241
1998-10-01	79.2832987103439
1999-01-01	79.0878252701704
1999-04-01	79.2345517034755
1999-07-01	79.1575777706110
1999-10-01	79.0644630720387
2000-01-01	79.2474579835628
2000-04-01	78.9667661210827
2000-07-01	79.3926135443776
2000-10-01	79.3465165056894
2001-01-01	79.5342964348434
2001-04-01	79.4112647268756
2001-07-01	79.7663277917518
2001-10-01	79.7916309341121
2002-01-01	80.1563929160694
2002-04-01	80.1024544586204
2002-07-01	80.1806072035940
2002-10-01	79.7293894416144
2003-01-01	79.7023739529436
2003-04-01	79.4862015626238
2003-07-01	79.5627168152776
2003-10-01	79.3920761709426
2004-01-01	79.0779095693774
2004-04-01	79.0069022305291
2004-07-01	78.8152460884682
2004-10-01	78.7535731936930
2005-01-01	78.7880658527692
2005-04-01	78.7750014188356
2005-07-01	78.8578053812184
2005-10-01	78.9907825814638
2006-01-01	79.1115500988895
2006-04-01	79.2430095451551
2006-07-01	79.2213650332001
2006-10-01	79.2081713304426
2007-01-01	79.2863418231269
2007-04-01	78.9480954222735
2007-07-01	79.4058991544414
2007-10-01	79.1524792172715
2008-01-01	79.4034172602500
2008-04-01	79.3603404041163
2008-07-01	79.1226136564364
2008-10-01	79.1087718536513
2009-01-01	78.5083589871006
2009-04-01	78.5228218458500
2009-07-01	77.8289749309294
2009-10-01	77.8783925461991
2010-01-01	77.9377472875299
2010-04-01	77.6821527696109
2010-07-01	77.8878159079152
2010-10-01	77.8676250687996
2011-01-01	78.2334724088226
2011-04-01	77.9152797222853
2011-07-01	78.1565693615962
2011-10-01	77.5736229376930
2012-01-01	77.4603930470069
2012-04-01	77.4329872466944
2012-07-01	77.4806119670770
2012-10-01	76.7685743413842
2013-01-01	76.5695566379472
2013-04-01	76.4409388827558
2013-07-01	76.4490251339083
2013-10-01	76.5228920545786
2014-01-01	76.5737689127653
2014-04-01	76.8108272634068
2014-07-01	76.7406914457432
2014-10-01	76.6523681408097
2015-01-01	76.5065744292657
2015-04-01	76.6095223376006
2015-07-01	76.5445661632438
2015-10-01	77.0459391191599
2016-01-01	76.8332228974980
2016-04-01	77.1210951122889
2016-07-01	77.4778074580292
2016-10-01	77.1969401786416
2017-01-01	77.5429327594299
2017-04-01	77.7578439683676
2017-07-01	78.0391240875379
2017-10-01	78.3157972356492
2018-01-01	78.2201825033031
2018-04-01	78.0518934895549