Quarter	Percent, Seasonally Adjusted
1999-04-01	52.0366969242266
1999-07-01	51.7633462616391
1999-10-01	52.0344170215408
2000-01-01	52.2170211792176
2000-04-01	52.7719474232700
2000-07-01	53.2633637364223
2000-10-01	53.5123888590463
2001-01-01	53.7630881901645
2001-04-01	53.9279409314538
2001-07-01	54.2211435145053
2001-10-01	54.5044493531130
2002-01-01	54.6810719096836
2002-04-01	55.0598644661900
2002-07-01	55.4324070109634
2002-10-01	55.9594150832650
2003-01-01	56.1759448133156
2003-04-01	57.2944861876447
2003-07-01	57.6672066267731
2003-10-01	57.4811234499281
2004-01-01	57.6235464244413
2004-04-01	57.9065898940685
2004-07-01	57.5531745420405
2004-10-01	58.0747871050571
2005-01-01	58.3661478847334
2005-04-01	58.3336537197322
2005-07-01	58.2957541319535
2005-10-01	58.6634741823281
2006-01-01	58.5428283914924
2006-04-01	58.9991663369460
2006-07-01	59.5023365733748
2006-10-01	59.3203093460510
2007-01-01	59.0106909674948
2007-04-01	59.1796328821040
2007-07-01	59.0590924757391
2007-10-01	59.8254460963288
2008-01-01	59.5880772396899
2008-04-01	59.8029033957372
2008-07-01	59.6405378376298
2008-10-01	60.3171811502524
2009-01-01	60.4613424946372
2009-04-01	60.3524891336456
2009-07-01	60.1642974890468
2009-10-01	60.1731261465313
2010-01-01	60.3855519269887
2010-04-01	59.7616179689880
2010-07-01	60.2745479029384
2010-10-01	59.5608095456458
2011-01-01	59.8418721830013
2011-04-01	59.5863602345405
2011-07-01	59.5359101257424
2011-10-01	59.7414347767577
2012-01-01	60.4512217942652
2012-04-01	61.0092597686424
2012-07-01	61.2053648638543
2012-10-01	61.7669499004547
2013-01-01	61.9196311524558
2013-04-01	62.5686622823642
2013-07-01	63.2368560951566
2013-10-01	63.5179521976364
2014-01-01	63.6279602774583
2014-04-01	63.4985391020966
2014-07-01	63.4202246689094
2014-10-01	63.6469921196444
2015-01-01	63.8536684327059
2015-04-01	63.9680639948385
2015-07-01	64.6550222020962
2015-10-01	65.1738091365896
2016-01-01	65.4934866622158
2016-04-01	65.9317072895478
2016-07-01	65.7948944421845
2016-10-01	65.9513676850807
2017-01-01	66.3297356781034
2017-04-01	66.3759438965804
2017-07-01	66.3216309079039
2017-10-01	66.6678439725122
2018-01-01	67.3254383937622
2018-04-01	67.3807510882651