Quarter	Percent, Seasonally Adjusted
1999-01-01	38.7876465816492
1999-04-01	38.9661588813004
1999-07-01	39.1145486308270
1999-10-01	39.1754829334272
2000-01-01	39.2733400951405
2000-04-01	39.3432996726190
2000-07-01	39.5416774578378
2000-10-01	39.9414948885701
2001-01-01	39.4399090705035
2001-04-01	39.2003909855355
2001-07-01	39.3399223084180
2001-10-01	39.0921678979020
2002-01-01	39.2316925119055
2002-04-01	39.3555395028174
2002-07-01	39.2394252346966
2002-10-01	39.4281363809699
2003-01-01	39.7434143646810
2003-04-01	40.1535814761234
2003-07-01	40.2769752986857
2003-10-01	40.3723267581736
2004-01-01	40.1684010294322
2004-04-01	39.8364223559003
2004-07-01	39.7267522608040
2004-10-01	39.8834756127463
2005-01-01	39.8835018659936
2005-04-01	39.8896226756584
2005-07-01	39.9252694042189
2005-10-01	39.8316138507319
2006-01-01	40.1267603459133
2006-04-01	39.9961349563399
2006-07-01	39.8413513978177
2006-10-01	39.8984262850119
2007-01-01	39.8626271796650
2007-04-01	39.7459510104410
2007-07-01	39.5609397354026
2007-10-01	39.4396190624473
2008-01-01	39.1699294435126
2008-04-01	39.0918205317830
2008-07-01	39.4872128708847
2008-10-01	39.5002751845502
2009-01-01	38.8311077155087
2009-04-01	38.7164102189404
2009-07-01	38.4414170650922
2009-10-01	38.6509722460520
2010-01-01	39.0817392334696
2010-04-01	39.1149981431011
2010-07-01	39.1868323589163
2010-10-01	39.0425690982543
2011-01-01	38.9312683561209
2011-04-01	39.0953046847015
2011-07-01	39.1435517106736
2011-10-01	39.3725790981424
2012-01-01	39.5490402239225
2012-04-01	40.2137571270674
2012-07-01	40.6892088753385
2012-10-01	40.3415762619282
2013-01-01	40.1595770672981
2013-04-01	40.3875138236457
2013-07-01	40.5298955179988
2013-10-01	41.1395697661408
2014-01-01	42.4151051940159
2014-04-01	42.4940907149911
2014-07-01	42.9439549422159
2014-10-01	43.2758790598518
2015-01-01	43.5938283246353
2015-04-01	43.9292064296676
2015-07-01	44.2509547421116
2015-10-01	44.3200066421575
2016-01-01	44.9226768743990
2016-04-01	45.4596152399801
2016-07-01	45.7525315426184
2016-10-01	46.1894760584609
2017-01-01	46.0299854978026
2017-04-01	46.1013819634570
2017-07-01	46.1974019919369
2017-10-01	46.3082816432776
2018-01-01	46.6686896641659
2018-04-01	46.9273611230502