Quarter	Percent, Seasonally Adjusted
1998-01-01	54.9316278787754
1998-04-01	55.6819983104683
1998-07-01	55.8345786063461
1998-10-01	56.6235915210386
1999-01-01	57.6201816716264
1999-04-01	57.9171287325828
1999-07-01	58.1946639640412
1999-10-01	57.8144513610053
2000-01-01	57.8941014397455
2000-04-01	58.2400925542602
2000-07-01	58.5624838647610
2000-10-01	58.4498156031825
2001-01-01	61.8605897396644
2001-04-01	61.1610334505723
2001-07-01	60.4293902254321
2001-10-01	60.9072860921758
2002-01-01	60.8001959262397
2002-04-01	60.7814358319880
2002-07-01	61.2610512367320
2002-10-01	61.7841582777964
2003-01-01	61.2368462372593
2003-04-01	61.7901658528552
2003-07-01	62.9195189692138
2003-10-01	64.0031540463995
2004-01-01	58.8480027281882
2004-04-01	59.8902008355023
2004-07-01	61.1799554951471
2004-10-01	61.2345781012864
2005-01-01	62.1303837999121
2005-04-01	63.1316981116545
2005-07-01	63.6968028463196
2005-10-01	63.3948287766852
2006-01-01	63.1031678151414
2006-04-01	63.7746799580084
2006-07-01	64.8583059701910
2006-10-01	65.2946744252554
2007-01-01	65.1066122077587
2007-04-01	65.6337190086697
2007-07-01	65.4661334871319
2007-10-01	66.0667455903224
2008-01-01	66.5962696711407
2008-04-01	65.9440315129721
2008-07-01	65.7222641529551
2008-10-01	65.6552057021528
2009-01-01	65.6709201849926
2009-04-01	66.1764928313487
2009-07-01	65.8756477749966
2009-10-01	66.5941003090492
2010-01-01	66.7070726305893
2010-04-01	66.6212862553875
2010-07-01	67.1460201344754
2010-10-01	67.4256839344048
2011-01-01	67.9997225099330
2011-04-01	68.4490871697949
2011-07-01	68.2607219170423
2011-10-01	68.5295608923295
2012-01-01	68.4307922276728
2012-04-01	68.7471549985522
2012-07-01	69.3260863669556
2012-10-01	68.5643451923501
2013-01-01	68.1075395597042
2013-04-01	68.3875811027714
2013-07-01	68.4391420749038
2013-10-01	68.8275142027344
2014-01-01	70.0443557466939
2014-04-01	69.8874433959040
2014-07-01	69.7714352889184
2014-10-01	70.3617319871832
2015-01-01	70.8245716646659
2015-04-01	72.0836893912775
2015-07-01	73.1030112353923
2015-10-01	73.3468145163393
2016-01-01	73.6485522100917
2016-04-01	73.7191719354406
2016-07-01	73.4817598683817
2016-10-01	73.4196690325368
2017-01-01	73.4329085139977
2017-04-01	73.4390112400562
2017-07-01	73.8365080397130
2017-10-01	74.6545753988433
2018-01-01	74.5888515761764
2018-04-01	74.7210859988526