Quarter	Percent, Seasonally Adjusted
1999-01-01	75.5733475080289
1999-04-01	75.4169764070064
1999-07-01	75.2930163425887
1999-10-01	75.5217802385421
2000-01-01	76.3534940180741
2000-04-01	76.1978497045823
2000-07-01	76.5738870846841
2000-10-01	76.9307216635007
2001-01-01	76.6629283768032
2001-04-01	77.1382388808573
2001-07-01	77.0059237014923
2001-10-01	77.9158224457975
2002-01-01	78.7216984069953
2002-04-01	78.8518688876609
2002-07-01	79.0138994667480
2002-10-01	79.5822976158259
2003-01-01	79.3775573053998
2003-04-01	80.0165778610219
2003-07-01	80.2951659350838
2003-10-01	80.0761544104712
2004-01-01	78.4486781523982
2004-04-01	78.5653390454034
2004-07-01	79.1690680129268
2004-10-01	79.1964454155628
2005-01-01	79.0866356074788
2005-04-01	79.2833429755906
2005-07-01	79.7751725935034
2005-10-01	79.5238438668330
2006-01-01	79.8878258595282
2006-04-01	80.1859714813369
2006-07-01	80.2251513278372
2006-10-01	80.0183895043572
2007-01-01	80.2071831654577
2007-04-01	80.2860432813044
2007-07-01	80.8604282642940
2007-10-01	80.6557209819773
2008-01-01	80.5321260805864
2008-04-01	80.9667439174523
2008-07-01	80.8390541728590
2008-10-01	81.3755392791692
2009-01-01	81.7797503376554
2009-04-01	82.1505696402441
2009-07-01	82.3204575493552
2009-10-01	81.9600190708831
2010-01-01	81.9827126261926
2010-04-01	82.1607086951018
2010-07-01	82.2131853656260
2010-10-01	83.1141759551195
2011-01-01	82.8076591461126
2011-04-01	82.9136836940768
2011-07-01	83.2189331491676
2011-10-01	83.9627776510308
2012-01-01	84.0077837699865
2012-04-01	84.1443612891756
2012-07-01	84.0821142988848
2012-10-01	83.8592622018615
2013-01-01	84.4256417462154
2013-04-01	84.3978225255765
2013-07-01	84.8609213601118
2013-10-01	84.4564785441237
2014-01-01	84.9033979606816
2014-04-01	84.7803478048455
2014-07-01	84.3174112854045
2014-10-01	84.1409991213270
2015-01-01	84.0360618685340
2015-04-01	84.1502551857248
2015-07-01	84.4137330647945
2015-10-01	84.9459876196807
2016-01-01	84.7379591411050
2016-04-01	84.9242317616840
2016-07-01	85.1214611728572
2016-10-01	84.8752325988992
2017-01-01	85.0490412794880
2017-04-01	85.0778921113580
2017-07-01	84.8407699580758
2017-10-01	85.2207030472224
2018-01-01	84.9666698828004
2018-04-01	84.8914801100467