Quarter	Percent, Seasonally Adjusted
1999-01-01	69.7671147958136
1999-04-01	69.8040413994347
1999-07-01	70.2574084500179
1999-10-01	70.2619337719399
2000-01-01	70.1504708355263
2000-04-01	70.4503954904408
2000-07-01	70.3696327554672
2000-10-01	70.6196797281982
2001-01-01	70.5578485306239
2001-04-01	70.2063957958898
2001-07-01	70.0938064217223
2001-10-01	69.6965053845306
2002-01-01	69.9019527011692
2002-04-01	69.9008858837375
2002-07-01	69.8626177192960
2002-10-01	69.7587706767583
2003-01-01	70.3322568898430
2003-04-01	71.1229698471954
2003-07-01	71.1735469667794
2003-10-01	71.4102465354999
2004-01-01	70.9051918025512
2004-04-01	70.7766979483584
2004-07-01	70.8422212737799
2004-10-01	71.2678508925531
2005-01-01	71.6667517146995
2005-04-01	72.1163920694056
2005-07-01	72.3420141038681
2005-10-01	72.3377710411645
2006-01-01	73.0591321607556
2006-04-01	73.0620238046843
2006-07-01	72.9785216868466
2006-10-01	73.4797462170541
2007-01-01	73.1426311105062
2007-04-01	72.9242165974918
2007-07-01	73.1391584425350
2007-10-01	73.6937146438969
2008-01-01	73.2014319494118
2008-04-01	73.1186415692443
2008-07-01	73.4820232836232
2008-10-01	73.6381464059547
2009-01-01	73.5811799734128
2009-04-01	73.3923902305377
2009-07-01	73.5481460762011
2009-10-01	73.7871059712469
2010-01-01	74.7894986442684
2010-04-01	74.7251661179288
2010-07-01	74.6877503702907
2010-10-01	74.0296575487269
2011-01-01	73.8746060688080
2011-04-01	74.4384884091498
2011-07-01	74.2646481733587
2011-10-01	74.9617760058760
2012-01-01	75.5206588457729
2012-04-01	76.2628980516296
2012-07-01	76.9952315527176
2012-10-01	77.0308106569354
2013-01-01	76.6524237964250
2013-04-01	77.0003553028926
2013-07-01	77.0092583477908
2013-10-01	77.7222928290246
2014-01-01	78.7703890971286
2014-04-01	78.6026168599088
2014-07-01	78.9002895860163
2014-10-01	78.9941594660292
2015-01-01	79.6495457315199
2015-04-01	79.5304602437190
2015-07-01	79.6753246018146
2015-10-01	79.6074511740714
2016-01-01	79.5624679914685
2016-04-01	79.7606360839028
2016-07-01	79.8630947572086
2016-10-01	80.0937341663509
2017-01-01	80.0469587652795
2017-04-01	80.2810872069871
2017-07-01	80.6433833838186
2017-10-01	80.5600699656408
2018-01-01	80.6363833260537
2018-04-01	81.0062452786630