Quarter	Percent, Seasonally Adjusted
1998-01-01	78.2380157157051
1998-04-01	78.1377707871087
1998-07-01	79.2012549562515
1998-10-01	79.3204967844465
1999-01-01	80.0466745257397
1999-04-01	80.2344273114378
1999-07-01	80.3714950731731
1999-10-01	80.6064320480396
2000-01-01	80.1007539614249
2000-04-01	80.8560399688773
2000-07-01	81.2941102044137
2000-10-01	81.1313857064610
2001-01-01	81.1448227030790
2001-04-01	81.5799144748666
2001-07-01	81.3925662525792
2001-10-01	81.6883326056326
2002-01-01	81.7668208586825
2002-04-01	81.6902545298061
2002-07-01	81.4940995826697
2002-10-01	81.2590430874295
2003-01-01	81.3351727204014
2003-04-01	81.0991643004359
2003-07-01	80.8863847990711
2003-10-01	81.1857043952619
2004-01-01	80.8976008889483
2004-04-01	80.6263827677201
2004-07-01	81.2981022887592
2004-10-01	81.3071879981177
2005-01-01	81.8284831798956
2005-04-01	81.6945248062330
2005-07-01	81.5460798301625
2005-10-01	81.8285429137334
2006-01-01	82.3449219869994
2006-04-01	82.2959997610678
2006-07-01	82.5777084269868
2006-10-01	82.5247956178548
2007-01-01	82.9184341905472
2007-04-01	83.3493997578683
2007-07-01	83.3820448034512
2007-10-01	83.7642216733595
2008-01-01	84.2649239005562
2008-04-01	84.4201691668061
2008-07-01	84.2263799550625
2008-10-01	84.2188121663837
2009-01-01	83.2577955675265
2009-04-01	82.2316541334802
2009-07-01	82.0949452608816
2009-10-01	82.0122827892724
2010-01-01	81.7322380346032
2010-04-01	81.4905329165339
2010-07-01	81.4025516679105
2010-10-01	81.6437193058551
2011-01-01	81.9424588250863
2011-04-01	82.0070175376151
2011-07-01	82.2805015045707
2011-10-01	82.8228439377017
2012-01-01	82.2683278187684
2012-04-01	81.8932027522300
2012-07-01	82.0459678455664
2012-10-01	81.6405380197213
2013-01-01	81.2244048296352
2013-04-01	81.5117597107547
2013-07-01	80.9104914447431
2013-10-01	80.5014088062788
2014-01-01	80.5106423333935
2014-04-01	80.6786051496430
2014-07-01	80.6341179104590
2014-10-01	80.0375276576159
2015-01-01	80.0347877181980
2015-04-01	79.7746944349599
2015-07-01	80.1111624123547
2015-10-01	79.9117670397516
2016-01-01	80.0729264048674
2016-04-01	79.7973901596293
2016-07-01	79.8979504776636
2016-10-01	79.8861351833698
2017-01-01	80.2488020342974
2017-04-01	80.3780250499016
2017-07-01	80.2392220196475
2017-10-01	81.6134929632832
2018-01-01	81.5438573100608
2018-04-01	82.1271305033617