Quarter	Percent, Seasonally Adjusted
1999-04-01	59.6296835833066
1999-07-01	60.1108697103652
1999-10-01	60.7410259525619
2000-01-01	61.4944267257638
2000-04-01	62.2587891632201
2000-07-01	62.6492400286043
2000-10-01	63.0631428546781
2001-01-01	63.2376146937645
2001-04-01	63.7789992212624
2001-07-01	64.2998579316889
2001-10-01	64.6578048755421
2002-01-01	64.8818466986465
2002-04-01	65.2677120966291
2002-07-01	64.4057158321264
2002-10-01	64.3379253432367
2003-01-01	64.6011271128462
2003-04-01	64.7267046678266
2003-07-01	64.7275207829965
2003-10-01	65.2017772452640
2004-01-01	65.4187611127394
2004-04-01	65.6416972607902
2004-07-01	65.9155541067014
2004-10-01	66.3629494592262
2005-01-01	66.9975394043469
2005-04-01	67.3089439485465
2005-07-01	67.5703835939506
2005-10-01	67.4926962005332
2006-01-01	67.6479081602963
2006-04-01	67.6108743828166
2006-07-01	68.0302890388855
2006-10-01	68.5480850484527
2007-01-01	68.9301564796936
2007-04-01	69.1771812545740
2007-07-01	69.2629858491391
2007-10-01	69.3684779474545
2008-01-01	69.5493048222062
2008-04-01	68.9580146338036
2008-07-01	68.5941755937629
2008-10-01	68.6724605144771
2009-01-01	66.8637754189569
2009-04-01	66.5227853934608
2009-07-01	66.3308592118414
2009-10-01	66.2052055131494
2010-01-01	66.0344471297285
2010-04-01	65.2871254771304
2010-07-01	64.6662554715058
2010-10-01	64.5581691992490
2011-01-01	64.0697339697559
2011-04-01	64.4339249382730
2011-07-01	64.0064982625102
2011-10-01	64.3990327886532
2012-01-01	64.0518639388072
2012-04-01	64.2665790110066
2012-07-01	64.2333881164146
2012-10-01	64.8866355231523
2013-01-01	64.9867810457496
2013-04-01	65.4695695595558
2013-07-01	65.8385216642584
2013-10-01	66.3454420159546
2014-01-01	66.4351236402625
2014-04-01	66.7039453655201
2014-07-01	66.6410306575698
2014-10-01	67.5674838771488
2015-01-01	67.5790805765766
2015-04-01	68.1635707528667
2015-07-01	68.2618355297149
2015-10-01	69.4868335727506
2016-01-01	69.1963926533550
2016-04-01	69.2385809581446
2016-07-01	69.4992536332559
2016-10-01	69.9623229902577
2017-01-01	70.4401153669871
2017-04-01	70.8119282065846
2017-07-01	72.4751820375682
2017-10-01	72.8471217959199
2018-01-01	72.7017304747929
2018-04-01	73.0925361422748