Quarter	Percent, Seasonally Adjusted
1999-01-01	56.2634819820583
1999-04-01	56.4915441676497
1999-07-01	55.9813397452058
1999-10-01	56.1974162224363
2000-01-01	56.4967758841100
2000-04-01	56.2317740393482
2000-07-01	57.4053351679393
2000-10-01	57.3973474614218
2001-01-01	57.8433906659300
2001-04-01	57.4375419288923
2001-07-01	58.2107675430375
2001-10-01	57.3793114833704
2002-01-01	58.3930515676797
2002-04-01	57.8600949312699
2002-07-01	56.5823981104214
2002-10-01	56.2036868256202
2003-01-01	56.3616569900147
2003-04-01	56.1981079736649
2003-07-01	55.4536712508696
2003-10-01	57.2220120994300
2004-01-01	58.2645211032516
2004-04-01	58.8810961434140
2004-07-01	59.5789546789907
2004-10-01	58.7894010789022
2005-01-01	59.3737420719934
2005-04-01	58.9363237066710
2005-07-01	59.3209929282509
2005-10-01	59.8137096208906
2006-01-01	59.8457783590224
2006-04-01	60.3173670590067
2006-07-01	59.8404079622837
2006-10-01	59.7512965770031
2007-01-01	60.2686486424262
2007-04-01	61.5875229223631
2007-07-01	61.4714019714938
2007-10-01	60.9498755169354
2008-01-01	60.9305570176625
2008-04-01	61.2329112886390
2008-07-01	62.0947249331337
2008-10-01	61.5599986709254
2009-01-01	60.4638258180998
2009-04-01	60.5635083770710
2009-07-01	60.6563355577733
2009-10-01	60.5821298059916
2010-01-01	60.3541494416489
2010-04-01	59.6009399807252
2010-07-01	59.0108642446485
2010-10-01	59.5362705673849
2011-01-01	57.9681823689884
2011-04-01	57.9282209804844
2011-07-01	57.8720604909519
2011-10-01	57.8902764722538
2012-01-01	58.4070232217533
2012-04-01	56.9567843685129
2012-07-01	56.8030236237466
2012-10-01	57.3748346036381
2013-01-01	56.0673997186199
2013-04-01	56.2622746335782
2013-07-01	57.0287212421175
2013-10-01	56.7208920677878
2014-01-01	56.9517108857324
2014-04-01	57.7757801521165
2014-07-01	56.9812303954626
2014-10-01	57.1946161364576
2015-01-01	57.1835515427359
2015-04-01	57.5718607045763
2015-07-01	58.1726080672146
2015-10-01	57.5244477240129
2016-01-01	57.0998685366164
2016-04-01	57.8083812184650
2016-07-01	57.5934483563553
2016-10-01	58.4873151332803
2017-01-01	59.8341402230335
2017-04-01	60.0068791276576
2017-07-01	60.8616641698934
2017-10-01	61.7383108483771
2018-01-01	61.9469129832157
2018-04-01	62.1377285447293