Quarter	Percent, Seasonally Adjusted
1998-01-01	19.8774111167343
1998-04-01	20.0038773490291
1998-07-01	19.9776266120614
1998-10-01	19.9466733846668
1999-01-01	19.9876122251207
1999-04-01	20.0257994779686
1999-07-01	20.1519488688286
1999-10-01	20.1890000110015
2000-01-01	20.4460937226210
2000-04-01	20.7846556846825
2000-07-01	20.9860154682036
2000-10-01	21.2849998577464
2001-01-01	21.2684117217673
2001-04-01	21.3669539150481
2001-07-01	21.5375105234306
2001-10-01	21.4975722457419
2002-01-01	21.5646143325938
2002-04-01	21.3772437400913
2002-07-01	21.4007288841425
2002-10-01	21.3899817457111
2003-01-01	21.7607424529128
2003-04-01	22.0048734487730
2003-07-01	22.1663589038740
2003-10-01	22.2457765706233
2004-01-01	22.3398791818431
2004-04-01	22.2000448451962
2004-07-01	22.0770440229562
2004-10-01	21.9836670911548
2005-01-01	21.6224490081828
2005-04-01	21.6281458374011
2005-07-01	21.5363273310735
2005-10-01	21.7931199006245
2006-01-01	21.5720776567655
2006-04-01	21.7230387774991
2006-07-01	21.8663505665437
2006-10-01	21.8050757094698
2007-01-01	21.9300607514314
2007-04-01	21.9699998458275
2007-07-01	21.8289543916604
2007-10-01	21.7629017958335
2008-01-01	21.9052248959530
2008-04-01	21.8540979449445
2008-07-01	21.9687340732878
2008-10-01	21.6982323672363
2009-01-01	21.6291775998037
2009-04-01	21.5811815986167
2009-07-01	21.4698401602763
2009-10-01	21.3171530711774
2010-01-01	21.5294109705085
2010-04-01	21.4488524649562
2010-07-01	21.2135364044265
2010-10-01	21.3522674239399
2011-01-01	21.5449755593528
2011-04-01	21.1365201130170
2011-07-01	21.3156520739736
2011-10-01	21.3596952794141
2012-01-01	21.0860371829161
2012-04-01	20.6721527616614
2012-07-01	20.2276704994096
2012-10-01	20.1345797087272
2013-01-01	19.8069733894265
2013-04-01	19.5230799047805
2013-07-01	19.4064008092059
2013-10-01	19.3152264768529
2014-01-01	19.0440921402203
2014-04-01	18.8535079262964
2014-07-01	18.6785124663556
2014-10-01	18.5293594375635
2015-01-01	18.5734565383998
2015-04-01	18.6838299868244
2015-07-01	18.7631711828664
2015-10-01	18.4965626780640
2016-01-01	18.1052552394384
2016-04-01	17.9834138522438
2016-07-01	17.7628756109670
2016-10-01	17.5305989036264
2017-01-01	17.3940057786170
2017-04-01	17.2447607688745
2017-07-01	16.9966736442290
2017-10-01	16.9086312245206
2018-01-01	16.8460016899094
2018-04-01	16.7081932464858