Quarter	Percent, Seasonally Adjusted
1998-01-01	56.4348694493708
1998-04-01	56.3672381223017
1998-07-01	56.1113654638283
1998-10-01	56.6242283197436
1999-01-01	56.7061432356862
1999-04-01	56.8695921335641
1999-07-01	56.9676593662373
1999-10-01	56.9253752182667
2000-01-01	57.5167963637621
2000-04-01	57.5054924119449
2000-07-01	58.0153362894244
2000-10-01	57.9365739825492
2001-01-01	58.4823441986156
2001-04-01	58.3530841256712
2001-07-01	58.3650525627098
2001-10-01	58.7642276907047
2002-01-01	58.7250601381754
2002-04-01	59.1195699538088
2002-07-01	59.6306203297788
2002-10-01	59.6820125204628
2003-01-01	60.1421986722823
2003-04-01	60.0439656702099
2003-07-01	59.7012223252889
2003-10-01	59.7587330631460
2004-01-01	59.6509640829036
2004-04-01	59.8709528708375
2004-07-01	60.2423919590048
2004-10-01	60.4969448112441
2005-01-01	60.5842071873724
2005-04-01	60.8833698373303
2005-07-01	61.2421007601976
2005-10-01	61.3197783793944
2006-01-01	61.1380802441746
2006-04-01	61.3574202413805
2006-07-01	61.5634510379790
2006-10-01	61.4872674215024
2007-01-01	61.7752521181602
2007-04-01	61.7934973797961
2007-07-01	62.2265437539294
2007-10-01	62.2340973715138
2008-01-01	61.8776346748504
2008-04-01	62.2910926837158
2008-07-01	62.2546253562284
2008-10-01	61.8741238350656
2009-01-01	62.2428047199077
2009-04-01	61.8742242598248
2009-07-01	61.9481145123744
2009-10-01	62.3317787432231
2010-01-01	62.7885516070162
2010-04-01	62.7881067517707
2010-07-01	62.5290912534171
2010-10-01	62.3222273216428
2011-01-01	61.9424380871634
2011-04-01	62.2411663352305
2011-07-01	61.5595338032134
2011-10-01	61.4219800973987
2012-01-01	61.9231944580928
2012-04-01	62.1003327675588
2012-07-01	62.1294373838042
2012-10-01	61.7067410661682
2013-01-01	61.3449382187029
2013-04-01	61.5515601177807
2013-07-01	61.6534902309101
2013-10-01	62.0648204567812
2014-01-01	61.4210218716858
2014-04-01	61.6564482212684
2014-07-01	61.8870131707988
2014-10-01	61.4560959049797
2015-01-01	61.8217779224160
2015-04-01	61.8805088746922
2015-07-01	61.7190478737762
2015-10-01	61.5662625260807
2016-01-01	61.5223148094693
2016-04-01	61.1910991748609
2016-07-01	61.7189499470974
2016-10-01	61.8349668155258
2017-01-01	61.9062462948640
2017-04-01	62.2325796625924
2017-07-01	62.6189634396770
2017-10-01	62.4952844848920
2018-01-01	62.6816980070176
2018-04-01	62.9035316736851