Quarter	Percent, Seasonally Adjusted
1998-04-01	71.1707672476602
1999-04-01	71.4357495114916
2000-04-01	71.4275135605458
2001-04-01	72.0951189906941
2002-04-01	71.8176026212797
2003-04-01	70.9953666143833
2004-04-01	70.3795025728988
2005-04-01	70.1484604754987
2006-04-01	70.8859201968712
2007-04-01	71.4591975459267
2008-04-01	72.3050468575359
2009-04-01	71.8006871688980
2010-01-01	69.8158206901257
2010-04-01	69.9429138551345
2010-07-01	70.1916905849061
2010-10-01	70.2944370664745
2011-01-01	70.8525411659826
2011-04-01	70.9640415058766
2011-07-01	70.8088289459179
2011-10-01	71.0259438741267
2012-01-01	71.0333715637559
2012-04-01	70.8611852080655
2012-07-01	71.1137165943981
2012-10-01	70.7287628016764
2013-01-01	70.7697362839541
2013-04-01	70.5918416968399
2013-07-01	70.7125121147556
2013-10-01	70.9431635403074
2014-01-01	70.6164992280806
2014-04-01	70.9763303526741
2014-07-01	70.9949621789178
2014-10-01	71.8827217099556
2015-01-01	71.6968196688446
2015-04-01	71.2980612531914
2015-07-01	71.0799489304054
2015-10-01	71.5656002815475
2016-01-01	71.9143973746130
2016-04-01	71.5902506194702
2016-07-01	71.7489981871717
2016-10-01	72.0419716649514
2017-01-01	71.9106576982322
2017-04-01	71.8370651435056
2017-07-01	71.8870311640028
2017-10-01	72.0402863355301
2018-01-01	72.0577178579428
2018-04-01	72.0746865331835