Quarter	Percent, Seasonally Adjusted
1998-01-01	66.5611887412249
1998-04-01	66.9397209160827
1998-07-01	66.7696665998018
1998-10-01	67.1316935041790
1999-01-01	67.3688601225139
1999-04-01	67.3078906208828
1999-07-01	67.6077262294709
1999-10-01	67.7591990452957
2000-01-01	68.1490790746892
2000-04-01	68.1245885384573
2000-07-01	68.5327627258274
2000-10-01	68.7028588030523
2001-01-01	69.0083430773691
2001-04-01	68.7930422565173
2001-07-01	68.9941059682652
2001-10-01	69.1558582681343
2002-01-01	69.1808798598244
2002-04-01	68.9824826290448
2002-07-01	68.9179070691660
2002-10-01	68.1552074615570
2003-01-01	68.2600969882344
2003-04-01	67.9544742198617
2003-07-01	67.9398514167198
2003-10-01	67.8298098790948
2004-01-01	67.7613893294159
2004-04-01	67.6086252645718
2004-07-01	67.4987229025796
2004-10-01	67.6443265308984
2005-01-01	67.3297983273156
2005-04-01	67.2892256790348
2005-07-01	67.2709801094016
2005-10-01	67.3428314134658
2006-01-01	67.5618692189474
2006-04-01	67.7491478991477
2006-07-01	67.8146503662177
2006-10-01	67.4060515733414
2007-01-01	67.3966989488908
2007-04-01	67.2877515321525
2007-07-01	67.8563616379521
2007-10-01	67.8963161390937
2008-01-01	68.1134161161295
2008-04-01	68.3189513876785
2008-07-01	67.9308281954416
2008-10-01	67.6959508490520
2009-01-01	66.9861476932328
2009-04-01	66.3115528648051
2009-07-01	65.4906729032113
2009-10-01	65.5394510696011
2010-01-01	65.7386118582111
2010-04-01	65.2412005416101
2010-07-01	65.1052090595846
2010-10-01	64.9947715620141
2011-01-01	64.5649392805603
2011-04-01	64.2624882297846
2011-07-01	63.8199395623030
2011-10-01	62.5923701127088
2012-01-01	62.4093193910531
2012-04-01	61.8165513934261
2012-07-01	61.2249505677025
2012-10-01	60.1967776637346
2013-01-01	59.8734601613813
2013-04-01	60.1012656969096
2013-07-01	60.8460958189868
2013-10-01	61.6748758749702
2014-01-01	62.0283417277728
2014-04-01	62.3488514499266
2014-07-01	63.0515189773543
2014-10-01	63.0485541295692
2015-01-01	63.2945405730766
2015-04-01	63.9986542440076
2015-07-01	64.0222913404941
2015-10-01	64.3036317116987
2016-01-01	64.4770634523191
2016-04-01	64.8994263875878
2016-07-01	65.6309655739780
2016-10-01	65.9844213817666
2017-01-01	66.7873834044005
2017-04-01	67.3509132008860
2017-07-01	68.2320753027710
2017-10-01	68.8702999929048
2018-01-01	69.2299854891452
2018-04-01	69.6397298050883