Quarter	Percent, Seasonally Adjusted
1999-01-01	45.5324151101785
1999-04-01	45.6843023579880
1999-07-01	45.5543205077838
1999-10-01	45.6320514184492
2000-01-01	45.3277464444078
2000-04-01	45.5388414892462
2000-07-01	45.2773003116974
2000-10-01	45.0669488629587
2001-01-01	45.0908539693670
2001-04-01	44.4208734529821
2001-07-01	44.5857936544722
2001-10-01	43.9804955548177
2002-01-01	43.4571967499128
2002-04-01	43.6016023537546
2002-07-01	43.2818979107621
2002-10-01	43.0869724039817
2003-01-01	42.9893961271965
2003-04-01	42.4241680680749
2003-07-01	42.6360887380134
2003-10-01	42.8045937456333
2004-01-01	43.7556466838556
2004-04-01	43.7130438994238
2004-07-01	43.4557758833218
2004-10-01	43.1945436728638
2005-01-01	42.8789528650455
2005-04-01	42.6616926913541
2005-07-01	42.2690707250141
2005-10-01	42.2296389963564
2006-01-01	42.0714446375422
2006-04-01	41.7719404805426
2006-07-01	41.6948174664820
2006-10-01	41.4511183893417
2007-01-01	41.1754992485598
2007-04-01	40.9223665837535
2007-07-01	40.4890334875656
2007-10-01	40.6188518312227
2008-01-01	40.4439006097187
2008-04-01	40.4000162767246
2008-07-01	40.3439116188286
2008-10-01	39.7831401243299
2009-01-01	39.7479546561852
2009-04-01	39.4572049456181
2009-07-01	39.3328557096303
2009-10-01	39.6131140943016
2010-01-01	39.6080414552590
2010-04-01	39.5260234134488
2010-07-01	39.4390689077611
2010-10-01	39.2807368105588
2011-01-01	39.1327144046317
2011-04-01	39.2589322175881
2011-07-01	39.2164145612657
2011-10-01	38.8705148470812
2012-01-01	38.7489315239513
2012-04-01	38.6588282600224
2012-07-01	38.5291645687357
2012-10-01	38.5407346103421
2013-01-01	38.4805027238376
2013-04-01	38.3814375643185
2013-07-01	38.0522488718821
2013-10-01	38.3086529063879
2014-01-01	38.0547685247668
2014-04-01	38.0699726905604
2014-07-01	38.4529558049379
2014-10-01	38.1576339015116
2015-01-01	38.2501257121548
2015-04-01	37.9675727289072
2015-07-01	37.7305121880818
2015-10-01	37.4127772449883
2016-01-01	37.2097879131582
2016-04-01	37.0788941444563
2016-07-01	36.7559619269056
2016-10-01	36.9782754165609
2017-01-01	36.8803640452069
2017-04-01	36.7325782207571
2017-07-01	36.9396768385666
2017-10-01	36.7283711505146
2018-01-01	36.8075917813678
2018-04-01	36.9249149790622