Quarter	Percent, Seasonally Adjusted
2006-01-01	56.9523836724796
2006-04-01	57.3245435020390
2006-07-01	57.5850124030256
2006-10-01	57.8833138279283
2007-01-01	57.7495890886982
2007-04-01	57.5683444489580
2007-07-01	57.5283880869249
2007-10-01	57.2194432321189
2008-01-01	57.6564852355722
2008-04-01	58.1376438150625
2008-07-01	58.4238775849818
2008-10-01	58.7499791488180
2009-01-01	58.6370298482572
2009-04-01	59.0932943566877
2009-07-01	59.7917508079216
2009-10-01	60.1305185270639
2010-01-01	60.8846635930376
2010-04-01	61.0584962637778
2010-07-01	61.0098845639631
2010-10-01	61.3680901495369
2011-01-01	62.1371037770813
2011-04-01	62.3144859037212
2011-07-01	62.5428656066267
2011-10-01	62.2212204599897
2012-01-01	62.0972001799643
2012-04-01	62.5515847415818
2012-07-01	62.9291679967802
2012-10-01	63.7521442863045
2013-01-01	63.8237750621471
2013-04-01	64.1302760927314
2013-07-01	63.8373001838627
2013-10-01	64.0364118774561
2014-01-01	64.1452750934811
2014-04-01	64.1854942343656
2014-07-01	64.5682465147655
2014-10-01	64.8112762840028
2015-01-01	65.1787247696900
2015-04-01	65.3294060108511
2015-07-01	65.5115339894704
2015-10-01	65.8286110115320
2016-01-01	66.0096822971116
2016-04-01	66.2935169176396
2016-07-01	66.6695509903006
2016-10-01	66.9226329875788
2017-01-01	67.2503553200438
2017-04-01	67.4068422208519
2017-07-01	67.6909756903891
2017-10-01	67.7753921231349
2018-01-01	67.7798638425915
2018-04-01	67.7088800584389