Quarter	Percent, Seasonally Adjusted
1998-01-01	61.1485970762626
1998-04-01	61.5361982098798
1998-07-01	61.3401066571486
1998-10-01	61.6613305696686
1999-01-01	61.7887038854475
1999-04-01	61.7409433113412
1999-07-01	62.0286083710035
1999-10-01	62.0955618735894
2000-01-01	62.5091096866290
2000-04-01	62.5778417866395
2000-07-01	62.9475336177037
2000-10-01	63.1170857033923
2001-01-01	63.3724523899586
2001-04-01	63.2797481313459
2001-07-01	63.4068510713096
2001-10-01	63.5837212500861
2002-01-01	63.5518731924298
2002-04-01	63.4153584900854
2002-07-01	63.3424051182216
2002-10-01	62.6464248628947
2003-01-01	62.7173567352912
2003-04-01	62.4209889211177
2003-07-01	62.4295811437649
2003-10-01	62.2930016821537
2004-01-01	62.2179378749561
2004-04-01	62.0462935144589
2004-07-01	61.8999868262685
2004-10-01	61.9638638745694
2005-01-01	61.6801756620194
2005-04-01	61.7667536297400
2005-07-01	61.7630434365699
2005-10-01	61.8561401154820
2006-01-01	61.9401725648768
2006-04-01	62.1783788474425
2006-07-01	62.2136496957886
2006-10-01	61.8480936505832
2007-01-01	61.9067463195557
2007-04-01	61.8163075747687
2007-07-01	62.3329597668090
2007-10-01	62.3188496971585
2008-01-01	62.4823679553254
2008-04-01	62.6195540057909
2008-07-01	62.2952498257122
2008-10-01	62.0089995314053
2009-01-01	61.3590979603359
2009-04-01	60.7951266833143
2009-07-01	60.1134812898406
2009-10-01	60.0992738020073
2010-01-01	60.2381323196947
2010-04-01	59.7379742457541
2010-07-01	59.4890733524766
2010-10-01	59.3446191875201
2011-01-01	58.7105033091362
2011-04-01	58.6032575986841
2011-07-01	58.1273292600349
2011-10-01	56.9578421109334
2012-01-01	56.8578363706084
2012-04-01	56.3325214998413
2012-07-01	55.7587713690292
2012-10-01	54.8442960569093
2013-01-01	54.4546495928412
2013-04-01	54.5534212834055
2013-07-01	55.1000835040870
2013-10-01	55.7809099703738
2014-01-01	55.8989440310982
2014-04-01	56.1884355628834
2014-07-01	56.6801528750065
2014-10-01	56.5507690439539
2015-01-01	56.7974791942252
2015-04-01	57.3799861266263
2015-07-01	57.2516440301210
2015-10-01	57.5879767283758
2016-01-01	57.5015543786484
2016-04-01	57.9200188879853
2016-07-01	58.5551320848112
2016-10-01	58.8318112034951
2017-01-01	59.4440721137343
2017-04-01	59.9969584931154
2017-07-01	60.5502684343586
2017-10-01	61.0186371021811
2018-01-01	61.3535197734391
2018-04-01	61.7288099297866