Quarter	Percent, Seasonally Adjusted
1999-01-01	67.2388894754732
1999-04-01	67.5750607066224
1999-07-01	67.1454411407784
1999-10-01	67.2063233075294
2000-01-01	66.8356537715794
2000-04-01	67.3830811541592
2000-07-01	68.0604077555012
2000-10-01	67.6214964953507
2001-01-01	67.9777223209380
2001-04-01	67.4676396360337
2001-07-01	68.6182618543305
2001-10-01	68.3592122266892
2002-01-01	69.0990451830221
2002-04-01	68.4153984002194
2002-07-01	66.9535858529132
2002-10-01	66.7681396600129
2003-01-01	67.2048169388779
2003-04-01	66.8624636964550
2003-07-01	66.3350850134620
2003-10-01	68.1015307953349
2004-01-01	69.0653363762184
2004-04-01	69.8937751729100
2004-07-01	70.5142365969149
2004-10-01	69.6749523576781
2005-01-01	70.4474702233297
2005-04-01	70.1030528610679
2005-07-01	70.6548241836229
2005-10-01	71.4574984389728
2006-01-01	71.3566416814942
2006-04-01	71.3962017705108
2006-07-01	70.6310105001346
2006-10-01	70.1989615355026
2007-01-01	70.5825453387498
2007-04-01	71.6502232105110
2007-07-01	71.6918821579678
2007-10-01	71.2832233769834
2008-01-01	71.2815228124525
2008-04-01	71.2533629230229
2008-07-01	72.4910792113829
2008-10-01	72.0849350448769
2009-01-01	71.0299782680828
2009-04-01	71.7092037199117
2009-07-01	72.3481836146546
2009-10-01	72.2948365552588
2010-01-01	72.0500145944733
2010-04-01	71.6801323800634
2010-07-01	70.7906002451649
2010-10-01	71.4703566871198
2011-01-01	70.3244699452699
2011-04-01	69.9247593859505
2011-07-01	70.0867896668062
2011-10-01	70.7293043787446
2012-01-01	70.6502142922913
2012-04-01	69.5689452266440
2012-07-01	70.2915163803520
2012-10-01	71.1186474694858
2013-01-01	70.7923978556522
2013-04-01	70.3698849055941
2013-07-01	70.6960425593902
2013-10-01	70.1685891248772
2014-01-01	70.6823992484918
2014-04-01	71.1886810165369
2014-07-01	70.7273887352393
2014-10-01	71.0001388378164
2015-01-01	71.0762739392342
2015-04-01	72.1537654422946
2015-07-01	72.3953906533297
2015-10-01	71.3913077213880
2016-01-01	71.0651995143446
2016-04-01	71.7806043625591
2016-07-01	71.1422713912089
2016-10-01	72.5442245656521
2017-01-01	73.6242695484391
2017-04-01	73.8252033913485
2017-07-01	74.6095913735496
2017-10-01	74.8012421864932
2018-01-01	74.7120281294740
2018-04-01	75.0264356164633