Quarter	Percent, Seasonally Adjusted
1998-01-01	67.1283477756171
1998-04-01	67.3719881157908
1998-07-01	67.1062000377124
1998-10-01	67.2868981928321
1999-01-01	67.2075597416807
1999-04-01	66.8297975305284
1999-07-01	67.1568880201477
1999-10-01	67.4152791215434
2000-01-01	67.5821832761900
2000-04-01	67.5185711500074
2000-07-01	67.9964648606801
2000-10-01	68.2509780908553
2001-01-01	68.2518159074246
2001-04-01	68.1181742887329
2001-07-01	68.1932146551317
2001-10-01	68.1210549359996
2002-01-01	68.2207395564160
2002-04-01	67.9825741185728
2002-07-01	67.7906497070094
2002-10-01	66.8390144994080
2003-01-01	66.3560467236648
2003-04-01	66.2511676788431
2003-07-01	66.3484760295009
2003-10-01	66.1585037007883
2004-01-01	65.9246481775718
2004-04-01	65.5390515629646
2004-07-01	65.2086002125375
2004-10-01	64.9805311557612
2005-01-01	64.6233534856008
2005-04-01	64.5501500247093
2005-07-01	64.4213387109717
2005-10-01	64.4883121155119
2006-01-01	64.8202175866242
2006-04-01	64.9200620856263
2006-07-01	64.9277205156638
2006-10-01	64.4087297624784
2007-01-01	64.5044719942658
2007-04-01	64.4324482422306
2007-07-01	64.6989430780750
2007-10-01	64.7017890112375
2008-01-01	64.8698976241727
2008-04-01	64.7294619286476
2008-07-01	64.2681441608517
2008-10-01	63.9870759033938
2009-01-01	62.7575690025127
2009-04-01	62.1269084721519
2009-07-01	61.0822465111169
2009-10-01	60.9685633375841
2010-01-01	61.2729261061798
2010-04-01	60.5449429760194
2010-07-01	60.4583014997664
2010-10-01	60.3791075292904
2011-01-01	59.6531951986698
2011-04-01	59.2432477883543
2011-07-01	58.9717312018146
2011-10-01	57.3907844155248
2012-01-01	56.9487686223236
2012-04-01	56.5135816980131
2012-07-01	55.7282997783146
2012-10-01	54.7506477610654
2013-01-01	54.2184217296878
2013-04-01	54.3402070121624
2013-07-01	54.8627889479467
2013-10-01	55.3625918425518
2014-01-01	55.1537003178963
2014-04-01	55.9123707373872
2014-07-01	56.4093945533609
2014-10-01	55.7973480110930
2015-01-01	55.9748784138832
2015-04-01	56.1384275590397
2015-07-01	56.2584267665923
2015-10-01	56.9155003611659
2016-01-01	56.1167047061668
2016-04-01	56.9121747861838
2016-07-01	57.6446714287806
2016-10-01	57.6024803909484
2017-01-01	58.2090531526242
2017-04-01	58.9637321147034
2017-07-01	59.5192695551589
2017-10-01	59.7695774769027
2018-01-01	59.8241103704538
2018-04-01	60.0071004104534