Quarter	Percent, Seasonally Adjusted
1999-01-01	67.5093146588504
1999-04-01	67.6033091370677
1999-07-01	67.6203987398323
1999-10-01	67.5626485143670
2000-01-01	67.6048220849245
2000-04-01	67.7318547504351
2000-07-01	67.9153535951756
2000-10-01	68.1768080316284
2001-01-01	67.7035949047597
2001-04-01	67.2846506111921
2001-07-01	67.0823329756985
2001-10-01	66.8710508524658
2002-01-01	67.0286382459404
2002-04-01	67.0121878169271
2002-07-01	67.0822223269048
2002-10-01	67.2004681190266
2003-01-01	67.3713777527616
2003-04-01	67.7718231984003
2003-07-01	67.7643120886968
2003-10-01	67.5438673651878
2004-01-01	67.5316171921072
2004-04-01	67.1184092420062
2004-07-01	67.0286762051130
2004-10-01	67.2913912129125
2005-01-01	67.5975734694994
2005-04-01	67.6979479830324
2005-07-01	68.0954934182216
2005-10-01	68.2156012947127
2006-01-01	68.5941525886752
2006-04-01	68.9494051711246
2006-07-01	68.8234333135455
2006-10-01	69.2121046031255
2007-01-01	68.9581005277377
2007-04-01	68.7681270002296
2007-07-01	68.5452510356724
2007-10-01	68.2893370526497
2008-01-01	68.0043076551455
2008-04-01	67.9362310071330
2008-07-01	68.1567571640485
2008-10-01	67.7736091723851
2009-01-01	67.8535974264742
2009-04-01	67.9354652027917
2009-07-01	67.4946672675160
2009-10-01	67.6854735890782
2010-01-01	67.7530107262030
2010-04-01	67.8140510854273
2010-07-01	67.7283357114864
2010-10-01	67.8939572016942
2011-01-01	68.1127091759709
2011-04-01	68.2062118133935
2011-07-01	68.5066352079240
2011-10-01	68.6425657751661
2012-01-01	69.0271438510483
2012-04-01	69.3792752319332
2012-07-01	69.6625015208644
2012-10-01	70.2268441443491
2013-01-01	69.9489572095174
2013-04-01	70.8615077269966
2013-07-01	71.4532405678571
2013-10-01	71.7729336005503
2014-01-01	72.9907674249116
2014-04-01	73.1136521891188
2014-07-01	73.6918951900270
2014-10-01	73.9339110877270
2015-01-01	74.5222621168609
2015-04-01	75.0407790667873
2015-07-01	75.5506833017191
2015-10-01	75.9335540174779
2016-01-01	76.4916157092039
2016-04-01	76.8879502125350
2016-07-01	76.9935674816020
2016-10-01	77.4170861595634
2017-01-01	77.6117099341085
2017-04-01	78.1958683224901
2017-07-01	78.4316949035599
2017-10-01	78.6910495640858
2018-01-01	78.9662897966018
2018-04-01	78.8744159220255