Quarter	Percent, Seasonally Adjusted
1999-01-01	58.1291776101188
1999-04-01	58.2803534005326
1999-07-01	58.3670974684668
1999-10-01	58.4330131932559
2000-01-01	58.4022442814416
2000-04-01	58.5936017579330
2000-07-01	58.7851901602582
2000-10-01	59.0386806360212
2001-01-01	58.1938297252179
2001-04-01	57.8114582908370
2001-07-01	57.7015071233967
2001-10-01	57.5183415751199
2002-01-01	57.5952949364080
2002-04-01	57.5864921557274
2002-07-01	57.6519765879993
2002-10-01	57.7419123016170
2003-01-01	57.8224090808406
2003-04-01	58.2194261402896
2003-07-01	58.2255619113752
2003-10-01	58.0887263698905
2004-01-01	58.1219059162776
2004-04-01	57.8411738551697
2004-07-01	57.7506485615120
2004-10-01	57.9075275529577
2005-01-01	58.1045437712834
2005-04-01	58.0876100903228
2005-07-01	58.4519239759562
2005-10-01	58.5793175691423
2006-01-01	58.7285107938312
2006-04-01	59.0341793925732
2006-07-01	58.8952892386099
2006-10-01	59.2368995770875
2007-01-01	59.0663790889162
2007-04-01	58.8582409322970
2007-07-01	58.6290454760487
2007-10-01	58.4037021452231
2008-01-01	58.1301702674052
2008-04-01	58.0876997480448
2008-07-01	58.3412883103483
2008-10-01	57.9218452467337
2009-01-01	57.9160221473018
2009-04-01	57.9952258308129
2009-07-01	57.7342356981924
2009-10-01	57.8810627820238
2010-01-01	57.7935180463299
2010-04-01	57.8248522741775
2010-07-01	57.8120527613295
2010-10-01	57.9400575532866
2011-01-01	58.0492536285762
2011-04-01	58.1520282943166
2011-07-01	58.4934083581814
2011-10-01	58.6195814460812
2012-01-01	58.8062061083573
2012-04-01	59.1321123782537
2012-07-01	59.3120543934696
2012-10-01	59.7432794412464
2013-01-01	59.2539563187846
2013-04-01	60.0656445155944
2013-07-01	60.5472971588134
2013-10-01	60.8140785141487
2014-01-01	61.5607168137407
2014-04-01	61.6475987185204
2014-07-01	62.0379957028261
2014-10-01	62.1766107578403
2015-01-01	62.5242429363449
2015-04-01	62.9260437702306
2015-07-01	63.3635923623187
2015-10-01	63.6608951928086
2016-01-01	64.0050631575141
2016-04-01	64.2609696764175
2016-07-01	64.3697429133485
2016-10-01	64.7037150175760
2017-01-01	64.7434257890027
2017-04-01	65.1951301827793
2017-07-01	65.2869175319836
2017-10-01	65.4721895013238
2018-01-01	65.6860281212829
2018-04-01	65.6011977425662