Quarter	Percent, Seasonally Adjusted
1999-01-01	65.8312441519522
1999-04-01	65.8410452450761
1999-07-01	66.3314878163491
1999-10-01	66.3536367858522
2000-01-01	66.5489276587183
2000-04-01	66.7199721571619
2000-07-01	66.9073198335988
2000-10-01	67.3291918924674
2001-01-01	67.3470107093602
2001-04-01	67.0562812278186
2001-07-01	66.9333782779427
2001-10-01	66.5690348127955
2002-01-01	66.6740154107116
2002-04-01	66.6288183427496
2002-07-01	66.3614556083134
2002-10-01	66.1652249177350
2003-01-01	66.6718851535339
2003-04-01	67.6129234892007
2003-07-01	67.6627435299844
2003-10-01	67.8031986481393
2004-01-01	67.2286524675852
2004-04-01	66.9133518870629
2004-07-01	66.7374935480589
2004-10-01	66.9422931337701
2005-01-01	66.9871075329147
2005-04-01	67.1424641423314
2005-07-01	67.4105284634852
2005-10-01	67.3480491919774
2006-01-01	67.8275813457136
2006-04-01	67.7167870371962
2006-07-01	67.4699758997640
2006-10-01	68.0450837452028
2007-01-01	68.0333507810536
2007-04-01	67.7700760748225
2007-07-01	67.7600765566740
2007-10-01	67.9735565953434
2008-01-01	67.7014304451368
2008-04-01	67.7989119097128
2008-07-01	68.1307798077741
2008-10-01	68.1409425991946
2009-01-01	67.4568736476296
2009-04-01	66.9608707522705
2009-07-01	66.6101532054832
2009-10-01	66.6642967489008
2010-01-01	67.2743687877523
2010-04-01	67.1872501876345
2010-07-01	67.0574935696884
2010-10-01	66.5123539529796
2011-01-01	66.1277302904323
2011-04-01	66.4858919856979
2011-07-01	66.4395121761794
2011-10-01	67.4121151091648
2012-01-01	67.7918985016165
2012-04-01	68.8774898906266
2012-07-01	69.8528067409002
2012-10-01	69.6003811476329
2013-01-01	69.4629139032648
2013-04-01	69.7010263816505
2013-07-01	69.9421514583412
2013-10-01	71.0564661147252
2014-01-01	72.9654434781912
2014-04-01	72.6411497125211
2014-07-01	73.4736549014316
2014-10-01	73.6384850922801
2015-01-01	74.1423959524574
2015-04-01	74.1509328142184
2015-07-01	74.5578554112728
2015-10-01	74.7330651621454
2016-01-01	75.3721767833960
2016-04-01	76.1977829428607
2016-07-01	76.2769687731891
2016-10-01	76.9339770627408
2017-01-01	76.7910772773020
2017-04-01	76.9655125469407
2017-07-01	77.5152309823108
2017-10-01	77.3470063983552
2018-01-01	77.5516051969622
2018-04-01	78.2146475075701