Quarter	Percent, Seasonally Adjusted
1999-04-01	67.6490248699425
1999-07-01	67.8909004216516
1999-10-01	68.0355774642373
2000-01-01	68.0558064228884
2000-04-01	68.0818379574556
2000-07-01	68.4454342605968
2000-10-01	68.0865317779878
2001-01-01	68.0331269976793
2001-04-01	67.9479419342743
2001-07-01	67.9008899406146
2001-10-01	68.1259274521680
2002-01-01	67.9660770233300
2002-04-01	68.4463576868691
2002-07-01	68.4624850059062
2002-10-01	68.4182185976924
2003-01-01	68.1900780017271
2003-04-01	68.2914908467473
2003-07-01	68.2106582677885
2003-10-01	68.4412148609760
2004-01-01	68.6455832609540
2004-04-01	68.6331493394588
2004-07-01	68.3286108961970
2004-10-01	68.5658616017197
2005-01-01	68.9435469373966
2005-04-01	68.7182422518150
2005-07-01	68.7971154120974
2005-10-01	68.8161803714869
2006-01-01	69.2597599313493
2006-04-01	69.4171859372345
2006-07-01	69.1982824037107
2006-10-01	69.1087770885499
2007-01-01	68.8548870336767
2007-04-01	68.8274292769506
2007-07-01	68.9679884506800
2007-10-01	69.1150578426648
2008-01-01	69.1846551867791
2008-04-01	69.3160691589452
2008-07-01	69.3393126461830
2008-10-01	69.3769372248353
2009-01-01	69.4991049775011
2009-04-01	69.3821843250457
2009-07-01	69.4522716175078
2009-10-01	69.5013008018098
2010-01-01	69.2438071331621
2010-04-01	69.3058596860805
2010-07-01	69.5557416769424
2010-10-01	69.1785759717982
2011-01-01	69.4767122046267
2011-04-01	69.5044391224969
2011-07-01	69.6535993565338
2011-10-01	69.8065978063452
2012-01-01	69.8064814746453
2012-04-01	69.9704671184355
2012-07-01	70.3015508725292
2012-10-01	70.8659232915679
2013-01-01	70.8260582830198
2013-04-01	70.7912198433741
2013-07-01	70.9245235049412
2013-10-01	70.9584999187288
2014-01-01	71.1354426809491
2014-04-01	71.2754355293189
2014-07-01	71.3355638695572
2014-10-01	71.4691130840440
2015-01-01	71.5575392084508
2015-04-01	71.6824347007352
2015-07-01	71.7527363989140
2015-10-01	71.7268944377732
2016-01-01	71.8333439263129
2016-04-01	72.2971684781471
2016-07-01	72.3274953811316
2016-10-01	72.4661630200949
2017-01-01	72.6169511765206
2017-04-01	72.8669175547583
2017-07-01	72.8966536232734
2017-10-01	73.1365535591890
2018-01-01	73.4260890149413
2018-04-01	73.1842911764720