Quarter	Percent, Seasonally Adjusted
1999-01-01	51.5404024701534
1999-04-01	51.6803077143078
1999-07-01	52.0190906485726
1999-10-01	52.4108151963534
2000-01-01	52.5793758315355
2000-04-01	52.8230186268873
2000-07-01	53.1379031975234
2000-10-01	53.3376683552103
2001-01-01	51.9761291929383
2001-04-01	52.1250506421427
2001-07-01	52.4568191222517
2001-10-01	52.7472659387915
2002-01-01	53.3935266964299
2002-04-01	53.7886334166148
2002-07-01	54.1273203228654
2002-10-01	54.3004864682751
2003-01-01	54.6431626979841
2003-04-01	54.9379124894634
2003-07-01	55.3645374221499
2003-10-01	55.5925110091616
2004-01-01	55.6368385736088
2004-04-01	55.8361621557449
2004-07-01	56.1573725082107
2004-10-01	56.4482254111411
2005-01-01	56.7290049883238
2005-04-01	57.1201373824699
2005-07-01	57.1130311054336
2005-10-01	57.3989162905524
2006-01-01	57.6694662552637
2006-04-01	57.8874249763672
2006-07-01	57.9880485161731
2006-10-01	58.2327417785919
2007-01-01	58.2982367983654
2007-04-01	58.4746981704932
2007-07-01	58.7256300303523
2007-10-01	58.8068677519664
2008-01-01	59.0609619659692
2008-04-01	59.3034093578347
2008-07-01	59.4330377225151
2008-10-01	59.6754531261736
2009-01-01	59.7674618690030
2009-04-01	59.5371941948634
2009-07-01	59.3140077121149
2009-10-01	59.3627104669766
2010-01-01	59.5199544303421
2010-04-01	59.6612475183298
2010-07-01	59.6388083542009
2010-10-01	59.6205489599366
2011-01-01	59.6044602321144
2011-04-01	59.7146610944225
2011-07-01	59.7331233538161
2011-10-01	59.6636347664792
2012-01-01	59.7657748131012
2012-04-01	59.7951734473408
2012-07-01	59.8181419858043
2012-10-01	59.6048417453545
2013-01-01	59.6441897484724
2013-04-01	59.2972367491720
2013-07-01	59.3141639495894
2013-10-01	59.1949065644068
2014-01-01	58.9224669837572
2014-04-01	58.9036902854896
2014-07-01	58.8039585823860
2014-10-01	59.0837796808561
2015-01-01	58.8491573036998
2015-04-01	59.0045304634510
2015-07-01	58.7292322238165
2015-10-01	58.7278311955549
2016-01-01	58.7059786852494
2016-04-01	58.6220903489887
2016-07-01	58.4970621575594
2016-10-01	58.2386775847525
2017-01-01	58.1968577659912
2017-04-01	58.0392552370856
2017-07-01	58.1262930783395
2017-10-01	58.0809519631832
2018-01-01	57.8950516803258
2018-04-01	57.9885457762037
2018-07-01	57.9237112674352