Quarter	Percent, Seasonally Adjusted
1999-01-01	56.6984027612219
1999-04-01	56.5482194703758
1999-07-01	56.6223092956563
1999-10-01	56.5030423590195
2000-01-01	56.4258686692504
2000-04-01	56.3845396298198
2000-07-01	56.3369662981032
2000-10-01	56.4234957847641
2001-01-01	56.3045688798923
2001-04-01	56.5172604392668
2001-07-01	56.4049605561512
2001-10-01	56.6549588970507
2002-01-01	56.4634946157600
2002-04-01	56.5766130886815
2002-07-01	56.6491950879838
2002-10-01	56.7841391674221
2003-01-01	56.9811742232391
2003-04-01	57.0269345073776
2003-07-01	56.8933768454178
2003-10-01	56.7268913213785
2004-01-01	54.8600230061892
2004-04-01	54.7414013053237
2004-07-01	54.6899010755843
2004-10-01	54.7020557729530
2005-01-01	55.1382291122086
2005-04-01	55.0698231204017
2005-07-01	55.3594487060700
2005-10-01	55.4839578700672
2006-01-01	55.6213015692104
2006-04-01	55.8661681456320
2006-07-01	56.1685536992899
2006-10-01	56.2816337555466
2007-01-01	56.6998087586158
2007-04-01	56.7621335344818
2007-07-01	57.2615447977720
2007-10-01	57.3726403727119
2008-01-01	57.6584474976364
2008-04-01	57.8530988786359
2008-07-01	57.6038732349017
2008-10-01	57.6418496211740
2009-01-01	57.4252463418306
2009-04-01	57.2127167816215
2009-07-01	57.0813464388686
2009-10-01	57.2429764126241
2010-01-01	57.3563219411024
2010-04-01	57.3807165709701
2010-07-01	57.5118768369634
2010-10-01	57.6913971367374
2011-01-01	57.6245375650793
2011-04-01	57.7043136970983
2011-07-01	57.9351884152556
2011-10-01	57.6491445681904
2012-01-01	57.8362272156136
2012-04-01	57.8527036991361
2012-07-01	57.7080415895913
2012-10-01	57.8302665091067
2013-01-01	57.6422708737232
2013-04-01	57.8044864907622
2013-07-01	57.7231244709459
2013-10-01	57.5115752230410
2014-01-01	57.3730635415733
2014-04-01	57.4152114154360
2014-07-01	57.1640701044480
2014-10-01	57.1828375267740
2015-01-01	57.2084866833226
2015-04-01	57.0639328680686
2015-07-01	57.3366733209668
2015-10-01	57.3815691902289
2016-01-01	57.4357209006108
2016-04-01	57.4130114886862
2016-07-01	57.5925081429211
2016-10-01	57.6643026801046
2017-01-01	57.6683203627444
2017-04-01	57.8517820383172
2017-07-01	57.8190735487047
2017-10-01	58.0704132740034
2018-01-01	58.2325332973612
2018-04-01	58.3548596384205