Quarter	Percent, Seasonally Adjusted
1999-01-01	19.4005666119054
1999-04-01	19.2900390618299
1999-07-01	19.2257392551216
1999-10-01	19.8591880272999
2000-01-01	19.7205840106686
2000-04-01	19.9556148820570
2000-07-01	20.5477220158064
2000-10-01	19.9317135499027
2001-01-01	20.4336023654009
2001-04-01	20.7717078765767
2001-07-01	19.9296370922858
2001-10-01	19.3585940451287
2002-01-01	20.4242477598985
2002-04-01	20.0624824822193
2002-07-01	20.6372579765592
2002-10-01	20.6018474571260
2003-01-01	20.9158589516656
2003-04-01	20.5145301038264
2003-07-01	20.1180452317362
2003-10-01	20.4974961790581
2004-01-01	20.2216943529854
2004-04-01	19.7478243037138
2004-07-01	19.2603643078650
2004-10-01	20.2025718027982
2005-01-01	19.7853052590405
2005-04-01	20.6013777036373
2005-07-01	20.6112004804400
2005-10-01	19.7794224417968
2006-01-01	19.4384567302339
2006-04-01	19.8574700885290
2006-07-01	19.3863483373265
2006-10-01	19.0974543107406
2007-01-01	19.1795119933344
2007-04-01	19.8241275344440
2007-07-01	20.3564663756753
2007-10-01	20.3081184884041
2008-01-01	20.0446297099031
2008-04-01	19.3005885494416
2008-07-01	19.0268296413872
2008-10-01	18.9504544943516
2009-01-01	19.3358727404833
2009-04-01	19.4022020191652
2009-07-01	19.6589353569646
2009-10-01	20.6340678273096
2010-01-01	20.3468678779531
2010-04-01	20.3626736193451
2010-07-01	20.9064584271897
2010-10-01	20.9356815040760
2011-01-01	20.5857266414841
2011-04-01	20.7636161798990
2011-07-01	20.7568242784165
2011-10-01	20.8466663844594
2012-01-01	20.8315931360395
2012-04-01	20.8951315394533
2012-07-01	21.8319025914491
2012-10-01	21.8723328470095
2013-01-01	21.4309668225960
2013-04-01	21.6630146501977
2013-07-01	21.9604282248362
2013-10-01	22.4449517601150
2014-01-01	22.4466380118370
2014-04-01	22.3307350550569
2014-07-01	21.6229481227683
2014-10-01	21.2988876869507
2015-01-01	21.3516910401005
2015-04-01	21.6708003002642
2015-07-01	21.8742045057789
2015-10-01	21.2778184140397
2016-01-01	20.0374136216647
2016-04-01	19.7845796047046
2016-07-01	20.1223390134154
2016-10-01	20.2419605860644
2017-01-01	21.1675037967376
2017-04-01	21.4290705526562
2017-07-01	20.9383880533768
2017-10-01	21.1066870816889
2018-01-01	20.9742509434080
2018-04-01	20.3823187544872