Quarter	Percent, Seasonally Adjusted
1999-01-01	92.1736986821619
1999-04-01	91.9240665499923
1999-07-01	91.8150753119416
1999-10-01	91.9351907325398
2000-01-01	92.0894991604681
2000-04-01	92.1922248905398
2000-07-01	92.0947096907908
2000-10-01	91.0012571727538
2001-01-01	91.1612783752880
2001-04-01	90.9955378739464
2001-07-01	91.0567500536321
2001-10-01	90.9777823157349
2002-01-01	91.1942533148431
2002-04-01	91.2818241431853
2002-07-01	91.0642189323967
2002-10-01	91.6008837743677
2003-01-01	90.6188320883264
2003-04-01	90.4900787658214
2003-07-01	91.1606579415927
2003-10-01	91.2138384036779
2004-01-01	92.0749597309021
2004-04-01	91.2080785185224
2004-07-01	91.9658705095972
2004-10-01	91.9561407690152
2005-01-01	92.1145076809148
2005-04-01	91.8796612497814
2005-07-01	92.4093188860510
2005-10-01	92.2633841352057
2006-01-01	90.9731900754910
2006-04-01	91.9959296916439
2006-07-01	91.8892250297496
2006-10-01	92.6162376632387
2007-01-01	92.6141180046927
2007-04-01	92.6632664731576
2007-07-01	92.5214869826096
2007-10-01	92.0945924881288
2008-01-01	92.5794291266352
2008-04-01	92.2893600789518
2008-07-01	92.5672783602161
2008-10-01	91.7118457725371
2009-01-01	92.2713011904732
2009-04-01	91.5637327151040
2009-07-01	91.5299725094587
2009-10-01	91.8460011816807
2010-01-01	92.4428882489852
2010-04-01	92.0402101327495
2010-07-01	92.1213688061889
2010-10-01	92.0416009586786
2011-01-01	90.1482338940866
2011-04-01	91.5180817642507
2011-07-01	90.3166909182807
2011-10-01	90.7126003004517
2012-01-01	90.2066530988481
2012-04-01	90.6692641738426
2012-07-01	91.1342854154725
2012-10-01	90.9855740557738
2013-01-01	90.5570829083458
2013-04-01	91.3669978650478
2013-07-01	90.6514879337146
2013-10-01	90.8238460872222
2014-01-01	91.1341997358843
2014-04-01	90.7700802833617
2014-07-01	90.4915864160786
2014-10-01	90.2633093446078
2015-01-01	90.3452307489499
2015-04-01	90.0362820008544
2015-07-01	89.6165001981399
2015-10-01	89.5499225579242
2016-01-01	90.0582651573002
2016-04-01	90.1379328966568
2016-07-01	90.3464959010221
2016-10-01	90.9362550982778
2017-01-01	89.8068218703420
2017-04-01	90.1380575145970
2017-07-01	89.9411533538014
2017-10-01	90.3041814410226
2018-01-01	89.8937100121028
2018-04-01	89.5534320729558