Quarter	Percent, Seasonally Adjusted
1998-01-01	64.4275052926025
1998-04-01	63.3656442234674
1998-07-01	65.1242028791429
1998-10-01	65.1919352284100
1999-01-01	65.5131770317866
1999-04-01	66.5430378320663
1999-07-01	66.0605890025930
1999-10-01	66.2063701326422
2000-01-01	66.3098378037522
2000-04-01	66.8782632017660
2000-07-01	66.9393708372505
2000-10-01	66.7754550789161
2001-01-01	66.7536142935696
2001-04-01	67.0916542865672
2001-07-01	66.9095973318514
2001-10-01	67.2811157422748
2002-01-01	66.9810459026224
2002-04-01	67.1142065039545
2002-07-01	66.9570478070873
2002-10-01	66.7881869987088
2003-01-01	66.8403684868840
2003-04-01	66.8282607524608
2003-07-01	66.4326048671840
2003-10-01	66.1034067846066
2004-01-01	66.0972298866458
2004-04-01	66.2077704732631
2004-07-01	66.4501582275241
2004-10-01	66.3319087227109
2005-01-01	66.7167449563506
2005-04-01	66.5864748616421
2005-07-01	66.4766117215316
2005-10-01	67.0958712338904
2006-01-01	67.1931060644814
2006-04-01	66.9311431943472
2006-07-01	67.3479174124634
2006-10-01	67.3242593572182
2007-01-01	67.2179712779371
2007-04-01	67.3514891159761
2007-07-01	67.7898368188451
2007-10-01	67.8010276272003
2008-01-01	67.8100816746932
2008-04-01	68.0650548724623
2008-07-01	67.7531239613047
2008-10-01	67.9486940330341
2009-01-01	67.3438344342694
2009-04-01	67.0892861979250
2009-07-01	66.4616682012471
2009-10-01	66.5681457861452
2010-01-01	66.5347424706558
2010-04-01	66.4246977375479
2010-07-01	66.3394234507288
2010-10-01	66.2133880526785
2011-01-01	66.3767017457934
2011-04-01	66.5037734781693
2011-07-01	66.3924942771524
2011-10-01	66.4287277865824
2012-01-01	66.3569858987834
2012-04-01	66.3167700892142
2012-07-01	66.6690401351025
2012-10-01	66.0144786137852
2013-01-01	66.0056639599054
2013-04-01	65.9822652808780
2013-07-01	65.5540420611484
2013-10-01	65.6385739347259
2014-01-01	65.6285911011304
2014-04-01	65.8018299657906
2014-07-01	65.6095770384800
2014-10-01	65.9102456400343
2015-01-01	65.8966099376996
2015-04-01	65.7594985672033
2015-07-01	66.0643232510491
2015-10-01	65.8125409683741
2016-01-01	65.7374243321920
2016-04-01	65.5284376492351
2016-07-01	65.6360877365660
2016-10-01	65.6181523105174
2017-01-01	65.7821016214373
2017-04-01	65.9164496150211
2017-07-01	65.9225159089973
2017-10-01	66.6979272306121
2018-01-01	66.8231137999737
2018-04-01	66.6218567913080