Quarter	Percent, Seasonally Adjusted
1999-01-01	51.8891377315164
1999-04-01	50.6589951521545
1999-07-01	50.5830202135421
1999-10-01	50.3933622059398
2000-01-01	49.7688478623048
2000-04-01	48.7040848649742
2000-07-01	49.5701185894093
2000-10-01	49.7193179585211
2001-01-01	49.4571340585066
2001-04-01	50.4623734214799
2001-07-01	50.3899181153598
2001-10-01	49.0205042174298
2002-01-01	48.3278845323989
2002-04-01	47.4611358262258
2002-07-01	46.9768699869124
2002-10-01	47.1238951805691
2003-01-01	46.0971940676335
2003-04-01	45.1557835790044
2003-07-01	44.7626541037835
2003-10-01	43.6373338627163
2004-01-01	43.5809436269263
2004-04-01	43.4089390080808
2004-07-01	42.6875922834007
2004-10-01	41.7733019351778
2005-01-01	41.1789767582858
2005-04-01	41.0039843786942
2005-07-01	40.0301742519535
2005-10-01	40.7742624602353
2006-01-01	40.6025623395734
2006-04-01	40.3833865551981
2006-07-01	39.4134214039890
2006-10-01	38.2060991726492
2007-01-01	38.3174851278326
2007-04-01	38.3199833720226
2007-07-01	38.8175936062096
2007-10-01	39.9726626384502
2008-01-01	39.3197231035477
2008-04-01	37.5571828122390
2008-07-01	37.3937067349698
2008-10-01	36.9875902469884
2009-01-01	36.7923134316359
2009-04-01	36.3139249062342
2009-07-01	37.6788446101893
2009-10-01	37.7706197042876
2010-01-01	35.9760201375936
2010-04-01	36.2046267711317
2010-07-01	36.6782861881855
2010-10-01	36.7521871569749
2011-01-01	36.7881040645328
2011-04-01	38.5891563255852
2011-07-01	36.5621540196634
2011-10-01	36.7102911485585
2012-01-01	36.9945634123229
2012-04-01	36.4754533433773
2012-07-01	37.6855520901613
2012-10-01	37.1406161215575
2013-01-01	37.9144074408887
2013-04-01	38.1499133127871
2013-07-01	37.5382958893998
2013-10-01	36.5971250099128
2014-01-01	37.8561653444576
2014-04-01	38.2374171410192
2014-07-01	37.7303500006490
2014-10-01	38.3606183700705
2015-01-01	38.8538803717595
2015-04-01	37.6484481290068
2015-07-01	38.2480922314183
2015-10-01	38.2870776138724
2016-01-01	38.8314625130365
2016-04-01	38.9639454634632
2016-07-01	40.3908788299794
2016-10-01	40.8566182614346
2017-01-01	40.6180153775229
2017-04-01	39.8342768679932
2017-07-01	38.7747429250339
2017-10-01	39.0045987945324
2018-01-01	39.1003679659452
2018-04-01	40.1094561280574