Quarter	Percent, Seasonally Adjusted
1998-01-01	72.6741271681782
1998-04-01	73.1855093055230
1998-07-01	73.3128646767816
1998-10-01	73.4937472875951
1999-01-01	73.5941229609177
1999-04-01	73.7851712339122
1999-07-01	73.9409496670962
1999-10-01	73.9210554148057
2000-01-01	73.9306862972696
2000-04-01	74.0770971570109
2000-07-01	74.5019197700323
2000-10-01	74.7084320641276
2001-01-01	75.0525513478410
2001-04-01	74.9079486633166
2001-07-01	75.2397471832603
2001-10-01	75.1272773213076
2002-01-01	75.5668585689501
2002-04-01	75.6327847132462
2002-07-01	75.8745889930075
2002-10-01	75.9113388150960
2003-01-01	76.0892238443745
2003-04-01	76.3247386292429
2003-07-01	76.4128992085088
2003-10-01	76.1857999651664
2004-01-01	77.7370214938832
2004-04-01	77.5158796040116
2004-07-01	77.5470918597440
2004-10-01	77.7883963006889
2005-01-01	77.5562793764519
2005-04-01	77.4166479885023
2005-07-01	77.1695081392034
2005-10-01	77.6124556618542
2006-01-01	77.9251893124059
2006-04-01	78.0541618067704
2006-07-01	77.5623417401645
2006-10-01	77.7217604684066
2007-01-01	77.0781942933793
2007-04-01	77.2362356744310
2007-07-01	77.8548632542732
2007-10-01	77.9554782515216
2008-01-01	78.1944962281475
2008-04-01	78.3136683855980
2008-07-01	78.0753494015352
2008-10-01	77.7764849983456
2009-01-01	77.3902945046425
2009-04-01	77.1943955565931
2009-07-01	77.2244212932529
2009-10-01	76.9912728389723
2010-01-01	76.9552206840237
2010-04-01	77.0082036751205
2010-07-01	76.6937744499781
2010-10-01	76.7704235125339
2011-01-01	76.7310708244669
2011-04-01	76.7892317113398
2011-07-01	76.9331952937634
2011-10-01	76.9546711876068
2012-01-01	77.7324213106311
2012-04-01	77.9719147129936
2012-07-01	77.7325094758873
2012-10-01	77.8793962066736
2013-01-01	77.7214641847026
2013-04-01	77.1623985562898
2013-07-01	76.8426631183248
2013-10-01	76.8627464874338
2014-01-01	77.1370274514654
2014-04-01	76.5218158626287
2014-07-01	76.9027333897265
2014-10-01	77.3567355098517
2015-01-01	76.7756162937439
2015-04-01	76.8063883803768
2015-07-01	76.6489505275289
2015-10-01	76.8155602532653
2016-01-01	76.8227650062006
2016-04-01	77.6107518388628
2016-07-01	77.6769690450912
2016-10-01	77.7027039372423
2017-01-01	78.0161834680603
2017-04-01	77.6168715400362
2017-07-01	78.0750980987778
2017-10-01	77.6984683863876
2018-01-01	77.7505798848942
2018-04-01	78.4011402889936