Quarter	Percent, Seasonally Adjusted
1999-01-01	18.8132824579780
1999-04-01	19.7175640974630
1999-07-01	19.2018595884310
1999-10-01	18.6439107856119
2000-01-01	17.7277769374275
2000-04-01	17.7725232253883
2000-07-01	17.3873072026499
2000-10-01	17.8610518544590
2001-01-01	17.9639686233945
2001-04-01	18.2863018809548
2001-07-01	19.1934978950860
2001-10-01	19.6067205794991
2002-01-01	18.9809596963889
2002-04-01	18.4889874807002
2002-07-01	18.8898254063817
2002-10-01	18.9155787888688
2003-01-01	19.3429326312998
2003-04-01	18.3754414948160
2003-07-01	18.5363894162486
2003-10-01	18.0381322241123
2004-01-01	18.6614413398527
2004-04-01	19.0932222686466
2004-07-01	18.5062626837119
2004-10-01	18.4565516685441
2005-01-01	18.6687712265012
2005-04-01	18.1006310293728
2005-07-01	17.6662082379820
2005-10-01	16.9569896119054
2006-01-01	17.0015031165068
2006-04-01	16.6190570653971
2006-07-01	16.6869026945360
2006-10-01	17.1284811388965
2007-01-01	16.9688751488674
2007-04-01	17.1923104567725
2007-07-01	17.1602041304382
2007-10-01	17.0197636073116
2008-01-01	16.9882431187258
2008-04-01	17.3637803029031
2008-07-01	17.1424629372848
2008-10-01	17.9362684746860
2009-01-01	19.3503130451245
2009-04-01	19.9757340111959
2009-07-01	20.0914230552194
2009-10-01	19.4195773283888
2010-01-01	18.8195544393550
2010-04-01	18.5738310867577
2010-07-01	18.3202343277330
2010-10-01	18.1816503861881
2011-01-01	17.5123138413111
2011-04-01	17.3138309325410
2011-07-01	17.4813680381815
2011-10-01	17.6803756562113
2012-01-01	17.6201146042812
2012-04-01	18.2632697779377
2012-07-01	18.5954894684576
2012-10-01	18.4052353042195
2013-01-01	18.8100628364941
2013-04-01	18.9313306755284
2013-07-01	18.7513170874236
2013-10-01	19.2606046448758
2014-01-01	19.3221996491260
2014-04-01	19.4503536267536
2014-07-01	20.0810704119482
2014-10-01	20.5491132332879
2015-01-01	20.9313969751022
2015-04-01	23.1004429919538
2015-07-01	21.1842293906810
2015-10-01	22.4384232688140
2016-01-01	23.0591363873800
2016-04-01	22.4921795185579
2016-07-01	22.5631176433374
2016-10-01	22.9056499066681
2017-01-01	21.3773962654541
2017-04-01	21.3290812946300
2017-07-01	21.1942504121997
2017-10-01	20.9539975935950
2018-01-01	21.2245551846332
2018-04-01	20.3417442337799