Quarter	Percent, Seasonally Adjusted
1999-01-01	49.1697463619599
1999-04-01	49.6348596408676
1999-07-01	50.2702905022793
1999-10-01	51.0402705946437
2000-01-01	51.3696595333205
2000-04-01	51.8052782498123
2000-07-01	52.2337556498569
2000-10-01	52.5073573111166
2001-01-01	50.3701716201953
2001-04-01	50.4357234838554
2001-07-01	51.0950025830081
2001-10-01	51.5688869808288
2002-01-01	52.8530503872047
2002-04-01	53.6560009100711
2002-07-01	54.2157376138067
2002-10-01	54.5119992157552
2003-01-01	55.0005644802949
2003-04-01	55.4712707042790
2003-07-01	56.1855058043491
2003-10-01	56.5187494123020
2004-01-01	56.7271887098249
2004-04-01	57.0668695237942
2004-07-01	57.5926334293797
2004-10-01	58.0384776421406
2005-01-01	58.1793439621684
2005-04-01	58.9067170952450
2005-07-01	58.9128414715771
2005-10-01	59.4475005081256
2006-01-01	60.0672432870640
2006-04-01	60.5786213356211
2006-07-01	60.6938713700672
2006-10-01	61.3270347915901
2007-01-01	61.4492662377130
2007-04-01	61.6278945284316
2007-07-01	62.1700612426978
2007-10-01	62.3554256885496
2008-01-01	62.7101090460028
2008-04-01	63.2869694160762
2008-07-01	63.7295143021629
2008-10-01	64.5858793226421
2009-01-01	64.8872458675214
2009-04-01	64.9829605121628
2009-07-01	65.2857602616648
2009-10-01	65.3358023051852
2010-01-01	65.8203330484461
2010-04-01	66.0233373423570
2010-07-01	66.4741120817515
2010-10-01	66.7062462511317
2011-01-01	66.8393410217417
2011-04-01	67.4539838065399
2011-07-01	67.5612784855918
2011-10-01	67.4684973691424
2012-01-01	68.1587409742766
2012-04-01	68.1910161570323
2012-07-01	68.5668719823389
2012-10-01	68.5364777074093
2013-01-01	68.7656049752918
2013-04-01	68.5818036202641
2013-07-01	68.7482959773819
2013-10-01	68.8446347061843
2014-01-01	68.8060053853767
2014-04-01	68.6737035189192
2014-07-01	68.6146908308867
2014-10-01	69.1333673383778
2015-01-01	68.8402988537367
2015-04-01	69.2926760232324
2015-07-01	68.8628799361959
2015-10-01	69.1095354496659
2016-01-01	69.1447133471330
2016-04-01	69.2967365381427
2016-07-01	69.3614921989130
2016-10-01	68.8931103781728
2017-01-01	68.8997545138500
2017-04-01	68.6869282729188
2017-07-01	68.8617611458419
2017-10-01	68.8624276082977
2018-01-01	68.5880909880763
2018-04-01	68.6957326561782
2018-07-01	68.6026536848402