Quarter	Percent, Seasonally Adjusted
1998-01-01	52.0217079766800
1998-04-01	51.7904457585896
1998-07-01	51.7984173425773
1998-10-01	52.0891112465938
1999-01-01	52.1207486295287
1999-04-01	52.0637212942051
1999-07-01	52.0459897268406
1999-10-01	52.0880197831676
2000-01-01	51.9417720757638
2000-04-01	51.6623734817650
2000-07-01	51.4519651314668
2000-10-01	51.3859261323240
2001-01-01	51.7289880434537
2001-04-01	51.2495431774826
2001-07-01	51.1807239666148
2001-10-01	50.8622015364398
2002-01-01	50.7720248720144
2002-04-01	50.8805199122638
2002-07-01	50.9890883583031
2002-10-01	51.1006780332715
2003-01-01	51.0025866189990
2003-04-01	50.9828602596327
2003-07-01	50.6490321578426
2003-10-01	50.5396737043744
2004-01-01	50.6720496078170
2004-04-01	50.5952536489308
2004-07-01	50.4202257136247
2004-10-01	50.4618602307900
2005-01-01	50.2797807355437
2005-04-01	50.5567133239768
2005-07-01	50.8147307071443
2005-10-01	50.9793789905771
2006-01-01	50.8806813313463
2006-04-01	50.7201413279444
2006-07-01	50.4762419660344
2006-10-01	50.1420513017897
2007-01-01	50.0740284897986
2007-04-01	49.9284073026855
2007-07-01	49.6027656208516
2007-10-01	49.5060210673370
2008-01-01	49.3944928404376
2008-04-01	49.4342263617347
2008-07-01	49.2288537810404
2008-10-01	49.2338622448941
2009-01-01	49.2993268710831
2009-04-01	49.5434066557958
2009-07-01	49.6814898163014
2009-10-01	49.5936458282684
2010-01-01	49.2924623854587
2010-04-01	49.2277563072386
2010-07-01	49.3257297594232
2010-10-01	49.4196182839716
2011-01-01	49.3906915893686
2011-04-01	49.5228958864974
2011-07-01	49.5402704672010
2011-10-01	49.4376347201282
2012-01-01	49.5199719474695
2012-04-01	49.8956006921607
2012-07-01	50.2326351765838
2012-10-01	50.5193223767148
2013-01-01	50.6062539806750
2013-04-01	51.0964472144207
2013-07-01	50.9634084122172
2013-10-01	50.9947067630645
2014-01-01	50.8177413230314
2014-04-01	50.6352456326686
2014-07-01	50.8041164230257
2014-10-01	51.1881108368616
2015-01-01	51.2773896515280
2015-04-01	51.2830834383461
2015-07-01	51.3300262343130
2015-10-01	51.1129154814202
2016-01-01	51.5427278846601
2016-04-01	51.7837825426000
2016-07-01	51.8842695256743
2016-10-01	52.2428335814204
2017-01-01	52.2124806097814
2017-04-01	52.0699875650862
2017-07-01	52.5650481127521
2017-10-01	52.3094473686426
2018-01-01	52.5195927414713
2018-04-01	52.6943871704909