Quarter	Percent, Seasonally Adjusted
1999-01-01	73.3557988437031
1999-04-01	73.0684234436561
1999-07-01	72.8937260551041
1999-10-01	72.8721168772018
2000-01-01	73.0718422244970
2000-04-01	72.7228479725956
2000-07-01	72.4824992036362
2000-10-01	72.4038235572559
2001-01-01	72.3510048430806
2001-04-01	72.1722356875036
2001-07-01	72.1887680417896
2001-10-01	72.3801896017062
2002-01-01	72.3474915220149
2002-04-01	72.1924432047956
2002-07-01	72.0905474699320
2002-10-01	72.3256298979458
2003-01-01	72.8975365193389
2003-04-01	72.6348822159429
2003-07-01	72.4653270234593
2003-10-01	72.7074525733532
2004-01-01	70.0638128563417
2004-04-01	70.3618025175865
2004-07-01	70.3271392331642
2004-10-01	70.1609653999002
2005-01-01	70.0549341161508
2005-04-01	70.4631942385231
2005-07-01	70.9239525292743
2005-10-01	71.1300701118750
2006-01-01	71.0639532161626
2006-04-01	71.0661452073026
2006-07-01	71.1991658682706
2006-10-01	71.1709763868344
2007-01-01	71.6029571285524
2007-04-01	72.0065042247448
2007-07-01	72.2830385587861
2007-10-01	71.9938305925094
2008-01-01	72.1726337057705
2008-04-01	72.1021608931818
2008-07-01	71.8757195404945
2008-10-01	71.7804028309281
2009-01-01	71.6528192122081
2009-04-01	71.7667777798644
2009-07-01	71.9223204834990
2009-10-01	72.0423311462438
2010-01-01	71.7185677991285
2010-04-01	71.6670762987783
2010-07-01	71.7771881689140
2010-10-01	71.7871866410082
2011-01-01	71.7612880922356
2011-04-01	71.6815953874253
2011-07-01	71.5318733935516
2011-10-01	71.5666557284717
2012-01-01	71.4654104371881
2012-04-01	71.8033976576653
2012-07-01	71.7616550476608
2012-10-01	71.7838945973149
2013-01-01	71.9305813978484
2013-04-01	71.8582996828635
2013-07-01	71.7315244740324
2013-10-01	71.4709477927036
2014-01-01	71.2749534224369
2014-04-01	71.2329440991344
2014-07-01	71.4393621566368
2014-10-01	71.4934834666646
2015-01-01	71.6927061321946
2015-04-01	71.6229290622512
2015-07-01	71.7321651023685
2015-10-01	71.8713877981306
2016-01-01	72.1246271484030
2016-04-01	72.3956838761656
2016-07-01	72.5960042323350
2016-10-01	72.4439338939852
2017-01-01	72.4019522527103
2017-04-01	72.6425747892800
2017-07-01	72.8269448256866
2017-10-01	73.1048227862909
2018-01-01	73.3111678492365
2018-04-01	73.3731367058864