Quarter	Percent, Seasonally Adjusted
1999-01-01	63.7550628922933
1999-04-01	63.5102777549094
1999-07-01	63.4685326710258
1999-10-01	63.4330487398746
2000-01-01	63.7354002046506
2000-04-01	63.4285703433100
2000-07-01	63.4381331503639
2000-10-01	63.5252317868090
2001-01-01	63.5099401997792
2001-04-01	63.7492627860613
2001-07-01	63.6667543827101
2001-10-01	64.0746811200757
2002-01-01	64.3114178629319
2002-04-01	64.1374773837794
2002-07-01	64.2369692876290
2002-10-01	64.4705743875173
2003-01-01	64.8664174758556
2003-04-01	64.9951397918495
2003-07-01	64.7933548390810
2003-10-01	64.8412301346816
2004-01-01	63.0542385024721
2004-04-01	63.2242467501823
2004-07-01	63.3370639186960
2004-10-01	63.3875020719554
2005-01-01	63.4994776199732
2005-04-01	63.8136214091970
2005-07-01	64.2443051520833
2005-10-01	64.3600800504955
2006-01-01	64.4030392440051
2006-04-01	64.5621933159837
2006-07-01	64.6746773316727
2006-10-01	64.7696189415967
2007-01-01	65.1304773167617
2007-04-01	65.4622953324982
2007-07-01	65.8236266569896
2007-10-01	65.5896446263270
2008-01-01	65.7837870699959
2008-04-01	65.7741319584697
2008-07-01	65.6815939332866
2008-10-01	65.9188287611443
2009-01-01	65.8693205732958
2009-04-01	66.0739699857787
2009-07-01	66.2170058396178
2009-10-01	66.1398736668841
2010-01-01	65.9714706379674
2010-04-01	65.9891392696494
2010-07-01	66.0952194630375
2010-10-01	66.1728343111521
2011-01-01	66.2292709896298
2011-04-01	66.1308687157954
2011-07-01	66.0793206237645
2011-10-01	66.2721057877094
2012-01-01	66.2779865619373
2012-04-01	66.5050849403122
2012-07-01	66.5437190371344
2012-10-01	66.5449829948281
2013-01-01	66.6507232906781
2013-04-01	66.6664010030883
2013-07-01	66.7746777770490
2013-10-01	66.5138858528348
2014-01-01	66.5459725162281
2014-04-01	66.5184323801982
2014-07-01	66.4325129210281
2014-10-01	66.6065413018727
2015-01-01	66.6633605546978
2015-04-01	66.7679622256752
2015-07-01	66.9517845902438
2015-10-01	67.1869537588084
2016-01-01	67.4222045285898
2016-04-01	67.6246815948589
2016-07-01	67.8911019071070
2016-10-01	67.6952975203436
2017-01-01	67.7259919420522
2017-04-01	67.9171763175029
2017-07-01	67.8995404790914
2017-10-01	68.1414015436385
2018-01-01	68.2075389164764
2018-04-01	68.1738018304996