Quarter	Percent, Seasonally Adjusted
1999-04-01	59.4842183796432
1999-07-01	59.8480421801633
1999-10-01	59.3846175580733
2000-01-01	59.3209842177869
2000-04-01	59.8437105457173
2000-07-01	60.5703024001994
2000-10-01	60.6378161110535
2001-01-01	61.1872356294607
2001-04-01	61.6119988097864
2001-07-01	61.9403230173284
2001-10-01	62.2185836350378
2002-01-01	62.2426627508950
2002-04-01	62.1030048932972
2002-07-01	62.6619473232330
2002-10-01	63.1978879178095
2003-01-01	63.5207206376661
2003-04-01	64.9176930153774
2003-07-01	65.4960445372834
2003-10-01	65.0435707829678
2004-01-01	65.4632825650143
2004-04-01	65.3695546616808
2004-07-01	65.7004126812504
2004-10-01	66.0684828331142
2005-01-01	66.0686316062664
2005-04-01	65.6970071906553
2005-07-01	65.8284143257994
2005-10-01	66.1095210236114
2006-01-01	65.5352151821409
2006-04-01	66.0265489257975
2006-07-01	66.3254917595084
2006-10-01	65.8580364347574
2007-01-01	65.2556950722507
2007-04-01	66.0356373995195
2007-07-01	66.1963122810062
2007-10-01	67.2789351356052
2008-01-01	67.4243342024785
2008-04-01	67.6626620983573
2008-07-01	67.0268391541685
2008-10-01	66.7659198477974
2009-01-01	66.9992940264723
2009-04-01	66.1573092768384
2009-07-01	65.9724021786490
2009-10-01	65.4704391927933
2010-01-01	65.8959318704337
2010-04-01	65.0025033168572
2010-07-01	64.8660800188102
2010-10-01	64.5646799240818
2011-01-01	64.6487872341746
2011-04-01	64.3162882172362
2011-07-01	63.4464171481884
2011-10-01	64.0595982207085
2012-01-01	64.3925243556757
2012-04-01	65.3266730083320
2012-07-01	66.0045677185015
2012-10-01	65.9157518232624
2013-01-01	65.7293429894585
2013-04-01	66.4771087632583
2013-07-01	67.5103944276598
2013-10-01	67.5296616132317
2014-01-01	67.8215172438099
2014-04-01	67.6330495096113
2014-07-01	68.0098478249666
2014-10-01	67.6831091466477
2015-01-01	68.0514275420797
2015-04-01	68.4473898185875
2015-07-01	68.5977657505149
2015-10-01	69.4562341200220
2016-01-01	69.2260915263915
2016-04-01	69.3154167949111
2016-07-01	69.9467038318304
2016-10-01	69.7220848024141
2017-01-01	69.6475931001705
2017-04-01	69.5937346535312
2017-07-01	68.9027839208724
2017-10-01	68.9137483755012
2018-01-01	70.0539856331884
2018-04-01	70.4124488784254