Quarter	Percent, Seasonally Adjusted
1999-04-01	63.4032441057437
1999-07-01	63.1319566216060
1999-10-01	62.9048037193903
2000-01-01	62.5970248932451
2000-04-01	63.2928292182043
2000-07-01	63.7194626627828
2000-10-01	63.8158957174330
2001-01-01	64.2103702965465
2001-04-01	64.3138746800308
2001-07-01	64.9098876828171
2001-10-01	64.9248071309881
2002-01-01	64.9262229284123
2002-04-01	64.8224652130388
2002-07-01	65.4655712610978
2002-10-01	65.9064432193897
2003-01-01	66.3330655431284
2003-04-01	67.7377444683896
2003-07-01	68.0480572431242
2003-10-01	67.5518306977748
2004-01-01	67.9931329137017
2004-04-01	67.9075970488351
2004-07-01	68.0115886598961
2004-10-01	68.2870105339181
2005-01-01	68.3404634066174
2005-04-01	67.9544598258915
2005-07-01	68.0998991890581
2005-10-01	68.5960277638527
2006-01-01	67.8260761963879
2006-04-01	68.2202388012257
2006-07-01	68.9028967161472
2006-10-01	68.4272250395151
2007-01-01	68.1246004315949
2007-04-01	68.7986497789415
2007-07-01	68.8267291703821
2007-10-01	69.9221928552933
2008-01-01	69.5513902148857
2008-04-01	69.9757465361065
2008-07-01	69.5712046458191
2008-10-01	70.2026224304751
2009-01-01	70.7343945289638
2009-04-01	70.2857734394340
2009-07-01	70.1303310657973
2009-10-01	69.9280130104002
2010-01-01	69.8511335569948
2010-04-01	69.2542579359175
2010-07-01	69.1216932747746
2010-10-01	68.5106373088576
2011-01-01	68.8405493483474
2011-04-01	68.5203094107963
2011-07-01	67.7760588234892
2011-10-01	68.4422072912373
2012-01-01	68.7661565038772
2012-04-01	69.3238185997857
2012-07-01	70.0223996455040
2012-10-01	70.0204397807194
2013-01-01	69.6451787068482
2013-04-01	70.3409390017377
2013-07-01	71.2930036909103
2013-10-01	71.2561751086501
2014-01-01	71.1972786831041
2014-04-01	70.8469089846506
2014-07-01	71.0643750049234
2014-10-01	70.6670491465034
2015-01-01	70.5895607816269
2015-04-01	71.0794213026028
2015-07-01	71.5364243488030
2015-10-01	72.2480749555020
2016-01-01	72.3618650050459
2016-04-01	72.4352145407166
2016-07-01	72.9402673123455
2016-10-01	72.6532319442237
2017-01-01	72.5833645274595
2017-04-01	72.5965571932815
2017-07-01	71.7475699877765
2017-10-01	71.7115980709165
2018-01-01	72.5837172290313
2018-04-01	72.6494532004646