Quarter	Percent, Seasonally Adjusted
1998-01-01	75.6453322548452
1998-04-01	75.9111706849822
1998-07-01	75.9466246014244
1998-10-01	76.0540336136582
1999-01-01	75.9870210424298
1999-04-01	75.5267175269950
1999-07-01	75.8647312614136
1999-10-01	75.9744539711421
2000-01-01	76.2850956969873
2000-04-01	76.2569969843979
2000-07-01	76.7077946257207
2000-10-01	76.9123337315836
2001-01-01	77.0614644040774
2001-04-01	76.8599073690336
2001-07-01	76.9691819223088
2001-10-01	76.9593335551786
2002-01-01	77.1464201764717
2002-04-01	76.7110329742735
2002-07-01	76.6262775000810
2002-10-01	75.6466283517304
2003-01-01	75.1729584430721
2003-04-01	74.9439258830192
2003-07-01	74.8486222854364
2003-10-01	74.6881562627936
2004-01-01	74.5744189850808
2004-04-01	74.1675426224350
2004-07-01	73.7976297973558
2004-10-01	73.5887379649650
2005-01-01	73.4273963141908
2005-04-01	73.2135369181514
2005-07-01	73.1722542655774
2005-10-01	73.2366718139766
2006-01-01	73.7045738275111
2006-04-01	73.7099137978306
2006-07-01	73.8683253287325
2006-10-01	73.3898466778985
2007-01-01	73.4675501627654
2007-04-01	73.3984218538361
2007-07-01	73.7519252316912
2007-10-01	73.9272851360925
2008-01-01	74.1579100150209
2008-04-01	74.0271940151277
2008-07-01	73.6027563306869
2008-10-01	73.3585397608723
2009-01-01	71.9990409505786
2009-04-01	71.2945984023155
2009-07-01	70.1522608876346
2009-10-01	69.9433622832318
2010-01-01	70.1158316562790
2010-04-01	69.6648792147882
2010-07-01	69.7344354582820
2010-10-01	69.4945335965403
2011-01-01	68.7072390042140
2011-04-01	68.0509218159894
2011-07-01	67.9241317203333
2011-10-01	66.1814623074487
2012-01-01	65.9427134611290
2012-04-01	64.9726455416908
2012-07-01	63.9073479594056
2012-10-01	63.1575191291520
2013-01-01	62.7482404745836
2013-04-01	63.0263952112114
2013-07-01	63.5929388133940
2013-10-01	64.5661908954649
2014-01-01	64.9685484367030
2014-04-01	65.6430588226838
2014-07-01	66.3626445308723
2014-10-01	66.1719608774552
2015-01-01	66.5035047013480
2015-04-01	66.7133862871266
2015-07-01	66.8621436462989
2015-10-01	67.4551464192044
2016-01-01	67.3234798184777
2016-04-01	68.1318654957046
2016-07-01	68.6556748163556
2016-10-01	68.9075375894066
2017-01-01	70.0503931773973
2017-04-01	70.6857758774161
2017-07-01	71.4512334992876
2017-10-01	72.1251726519799
2018-01-01	72.3167953108019
2018-04-01	72.5972010751188