Quarter	Percent, Seasonally Adjusted
1999-01-01	81.2044573880190
1999-04-01	81.1592651825598
1999-07-01	81.4724986827943
1999-10-01	82.1657090341310
2000-01-01	82.6796270050155
2000-04-01	82.4848531721597
2000-07-01	82.9102444886750
2000-10-01	83.5013706381217
2001-01-01	83.7283988274386
2001-04-01	83.7880438886061
2001-07-01	84.0384909120486
2001-10-01	84.0630557788412
2002-01-01	83.4714726125530
2002-04-01	83.6998973169398
2002-07-01	84.1824811385485
2002-10-01	84.0751772260857
2003-01-01	84.3610102782330
2003-04-01	84.5751180740364
2003-07-01	85.1525248691246
2003-10-01	85.2229469712019
2004-01-01	84.4211461621976
2004-04-01	84.2357495761477
2004-07-01	84.1505296242459
2004-10-01	83.5105109851253
2005-01-01	83.0193810953257
2005-04-01	82.1177256833531
2005-07-01	81.5955563599742
2005-10-01	81.7839561350885
2006-01-01	81.0811255994620
2006-04-01	81.3051921019499
2006-07-01	81.3029125468796
2006-10-01	81.1782342511724
2007-01-01	80.7880597815012
2007-04-01	80.3739303761242
2007-07-01	80.2219919308643
2007-10-01	81.2608300587526
2008-01-01	81.5360129010932
2008-04-01	81.8303576286706
2008-07-01	82.9138834827311
2008-10-01	82.1443680691012
2009-01-01	80.8739048927668
2009-04-01	80.5677511278520
2009-07-01	80.6271649850336
2009-10-01	80.8696621857183
2010-01-01	80.6865135860261
2010-04-01	80.5572387791794
2010-07-01	81.1511156457923
2010-10-01	81.0414491015477
2011-01-01	80.4902467832134
2011-04-01	80.1755601135856
2011-07-01	80.6276554294060
2011-10-01	80.3961146140129
2012-01-01	80.6814649150062
2012-04-01	80.5039158572552
2012-07-01	80.5481821502724
2012-10-01	79.6706954324449
2013-01-01	80.3904497579074
2013-04-01	80.0198859292036
2013-07-01	80.8310749846244
2013-10-01	80.9017280221869
2014-01-01	80.9196238744104
2014-04-01	80.4856905487076
2014-07-01	79.9249987599753
2014-10-01	80.2901398407406
2015-01-01	80.5392613813645
2015-04-01	80.4636995867672
2015-07-01	80.7140896723039
2015-10-01	81.4174839009300
2016-01-01	82.1289230506028
2016-04-01	81.8883506712094
2016-07-01	81.3411303125519
2016-10-01	80.4416872904261
2017-01-01	80.2274696154877
2017-04-01	79.3584388617673
2017-07-01	80.1852952080785
2017-10-01	79.3739409508116
2018-01-01	79.8621921003811
2018-04-01	79.0696322810811