Quarter	Percent, Seasonally Adjusted
1998-01-01	60.6091564647582
1998-04-01	59.6238083825876
1998-07-01	61.2624315864077
1998-10-01	61.7652817083515
1999-01-01	62.9555777099862
1999-04-01	63.7658384596508
1999-07-01	63.4091329980630
1999-10-01	63.5265789627394
2000-01-01	63.3857004653730
2000-04-01	64.2199621754345
2000-07-01	64.6619110326888
2000-10-01	64.5918403075871
2001-01-01	64.5976664206589
2001-04-01	65.5867935823060
2001-07-01	65.4204157161364
2001-10-01	65.9900341988058
2002-01-01	65.9117142754105
2002-04-01	66.2157802526627
2002-07-01	66.4578275512836
2002-10-01	66.1417531493891
2003-01-01	66.3575541662061
2003-04-01	66.0023390251784
2003-07-01	65.2887110833289
2003-10-01	65.2277255628655
2004-01-01	65.1692117726235
2004-04-01	65.2430441056642
2004-07-01	65.8766977667249
2004-10-01	65.9476165725591
2005-01-01	66.5085514633031
2005-04-01	66.4373111962592
2005-07-01	66.5240760332226
2005-10-01	66.6235710792434
2006-01-01	67.0778175333736
2006-04-01	67.1004681866990
2006-07-01	67.3332229636848
2006-10-01	67.6792039559818
2007-01-01	68.2454792083188
2007-04-01	68.2378343431592
2007-07-01	68.5207704651366
2007-10-01	68.9283931445421
2008-01-01	68.8256487610000
2008-04-01	68.9448425589351
2008-07-01	68.9942584377811
2008-10-01	69.1165232271490
2009-01-01	68.8391412104483
2009-04-01	68.0313769390890
2009-07-01	67.3729721368783
2009-10-01	67.3529693380820
2010-01-01	66.8760516837616
2010-04-01	66.9925818964377
2010-07-01	66.7558493985108
2010-10-01	67.0228713793754
2011-01-01	66.7289228199273
2011-04-01	67.1215582709406
2011-07-01	67.9312469103172
2011-10-01	67.9816731293050
2012-01-01	68.0254247542935
2012-04-01	67.9820856931781
2012-07-01	68.6670209610637
2012-10-01	67.9668657829026
2013-01-01	68.0533274946660
2013-04-01	68.0589612149197
2013-07-01	67.4632797431936
2013-10-01	67.7945957694061
2014-01-01	67.6682597718657
2014-04-01	68.2911043225830
2014-07-01	68.2808621989027
2014-10-01	67.5875190495673
2015-01-01	67.6558115936479
2015-04-01	67.6492570469348
2015-07-01	67.9146786819278
2015-10-01	67.7113653900104
2016-01-01	67.6455987706079
2016-04-01	67.1720904848498
2016-07-01	68.0322072663248
2016-10-01	67.6157563691599
2017-01-01	68.1314476344540
2017-04-01	68.1804351682952
2017-07-01	68.0784713905346
2017-10-01	69.7618976714704
2018-01-01	69.8827477370289
2018-04-01	70.9887059413315