Quarter	Percent, Seasonally Adjusted
1998-01-01	60.8523210612967
1998-04-01	60.4911950226207
1998-07-01	60.0615935557876
1998-10-01	59.8516894896691
1999-01-01	59.2757036334731
1999-04-01	58.8879583118522
1999-07-01	58.7243397782156
1999-10-01	58.7042411913746
2000-01-01	58.4606865843019
2000-04-01	58.3840047285528
2000-07-01	58.4721355788217
2000-10-01	58.4074136703677
2001-01-01	58.7350600391208
2001-04-01	58.4745474210408
2001-07-01	58.4077985467445
2001-10-01	58.5016278709163
2002-01-01	58.7816468300066
2002-04-01	59.1195853344041
2002-07-01	59.2368570380627
2002-10-01	59.1640987631133
2003-01-01	58.9540149580911
2003-04-01	58.6730029749909
2003-07-01	58.2597002536975
2003-10-01	58.0387836961942
2004-01-01	57.9525237814842
2004-04-01	57.9379288516030
2004-07-01	58.0408414974699
2004-10-01	58.1652656180248
2005-01-01	58.4217449282061
2005-04-01	58.6388756643659
2005-07-01	58.9691939506613
2005-10-01	58.9197890200430
2006-01-01	59.0467285325121
2006-04-01	59.1477627772477
2006-07-01	59.1646494949106
2006-10-01	59.3070719978130
2007-01-01	59.7581049418253
2007-04-01	59.9602094256482
2007-07-01	60.1257317416702
2007-10-01	60.2534614171954
2008-01-01	60.3593172084348
2008-04-01	60.4705250100815
2008-07-01	60.2702322308145
2008-10-01	60.3134049791560
2009-01-01	59.7681814981854
2009-04-01	59.1859006095743
2009-07-01	58.8131595344298
2009-10-01	58.6713243365163
2010-01-01	58.1796429998931
2010-04-01	58.3893990653678
2010-07-01	58.6918245513414
2010-10-01	58.7035325351974
2011-01-01	58.7737431154945
2011-04-01	58.8723475305048
2011-07-01	58.8976926360819
2011-10-01	58.7552815295732
2012-01-01	58.7281051742630
2012-04-01	59.0043366597878
2012-07-01	59.2277369477480
2012-10-01	59.2897384819194
2013-01-01	59.5062782200132
2013-04-01	59.9391716033830
2013-07-01	59.9131996577086
2013-10-01	60.0243520271408
2014-01-01	60.1644873778596
2014-04-01	60.2282451924692
2014-07-01	60.5078465239662
2014-10-01	60.8337121433996
2015-01-01	60.9300326878860
2015-04-01	61.2548347388472
2015-07-01	61.4679964721713
2015-10-01	61.7073599867404
2016-01-01	62.3334030617019
2016-04-01	62.6086915900288
2016-07-01	62.7497836965877
2016-10-01	63.1988855811367
2017-01-01	63.3835175093948
2017-04-01	63.5065389299544
2017-07-01	64.1420454884993
2017-10-01	64.3236095100207
2018-01-01	64.5867049345537
2018-04-01	64.9280374987891