Quarter	Percent, Seasonally Adjusted
1999-01-01	61.4041140763382
1999-04-01	61.9850768315896
1999-07-01	61.1086338755444
1999-10-01	61.5132041753852
2000-01-01	61.4268604762718
2000-04-01	61.2478737661329
2000-07-01	62.6799798039737
2000-10-01	62.7759385646101
2001-01-01	63.3643667545707
2001-04-01	63.1266707904130
2001-07-01	63.9482165343688
2001-10-01	62.6277800257012
2002-01-01	64.1503247850775
2002-04-01	62.9534002898424
2002-07-01	61.3522693904566
2002-10-01	61.4067655154146
2003-01-01	61.6112802825768
2003-04-01	61.6292998876862
2003-07-01	60.8372762849787
2003-10-01	62.8107004164115
2004-01-01	63.6777743141113
2004-04-01	64.1916995667210
2004-07-01	64.8789924556920
2004-10-01	64.7534850326628
2005-01-01	65.2158966897342
2005-04-01	64.1780253667506
2005-07-01	64.2939184541245
2005-10-01	65.1191831027521
2006-01-01	65.6660261273308
2006-04-01	65.1722330657006
2006-07-01	65.4390708129819
2006-10-01	65.3487828159464
2007-01-01	65.9746568617908
2007-04-01	67.3805478886777
2007-07-01	66.9535424879336
2007-10-01	66.5374895013870
2008-01-01	65.9429544431420
2008-04-01	66.4670224154213
2008-07-01	66.9469197309173
2008-10-01	65.7094067305668
2009-01-01	64.3898822974002
2009-04-01	65.0567896864607
2009-07-01	64.8057104413969
2009-10-01	65.0243378362228
2010-01-01	64.8264568751598
2010-04-01	63.4790958888739
2010-07-01	63.8180331996378
2010-10-01	63.7734352872980
2011-01-01	62.3125591186226
2011-04-01	62.2524677861000
2011-07-01	61.9086530696164
2011-10-01	61.7535669130337
2012-01-01	61.8149186246168
2012-04-01	61.0586824578522
2012-07-01	61.0615135625309
2012-10-01	61.7226912782020
2013-01-01	60.6475788444503
2013-04-01	60.5605497546207
2013-07-01	61.3675824398273
2013-10-01	61.2321799219610
2014-01-01	61.0699761857852
2014-04-01	61.8649787899280
2014-07-01	61.3360361170541
2014-10-01	61.9135251906920
2015-01-01	62.1520313019810
2015-04-01	62.0340197187160
2015-07-01	62.8061280100512
2015-10-01	61.5700334221660
2016-01-01	60.8968598404125
2016-04-01	61.4251707316720
2016-07-01	61.1195222296949
2016-10-01	61.5905679936138
2017-01-01	63.3311458300524
2017-04-01	64.2124863683680
2017-07-01	64.5478309311788
2017-10-01	65.0637289752281
2018-01-01	65.6183264821318
2018-04-01	66.1250341541631