Quarter	Percent, Seasonally Adjusted
1999-04-01	46.3976236768911
1999-07-01	46.8883302189686
1999-10-01	47.1699715609735
2000-01-01	47.4033769610272
2000-04-01	47.7335281057795
2000-07-01	47.8321807384427
2000-10-01	47.9632795514588
2001-01-01	48.1382701394662
2001-04-01	48.1688910580328
2001-07-01	48.7069055021782
2001-10-01	48.7505311695636
2002-01-01	49.1223315990761
2002-04-01	49.1695702923779
2002-07-01	49.0671748050078
2002-10-01	49.2329292415065
2003-01-01	49.3648368062492
2003-04-01	49.5548777112696
2003-07-01	49.7893589896246
2003-10-01	49.7673015650937
2004-01-01	49.8379120891453
2004-04-01	49.8752350291304
2004-07-01	50.1992551211391
2004-10-01	50.8902452672143
2005-01-01	51.2200874703551
2005-04-01	51.6954672121478
2005-07-01	52.0350028197913
2005-10-01	52.3103105718282
2006-01-01	52.6358849096060
2006-04-01	52.7879230869675
2006-07-01	53.2999510170035
2006-10-01	53.4068330873038
2007-01-01	56.6734215264478
2007-04-01	57.1503558348216
2007-07-01	57.0084747038944
2007-10-01	57.0649248536105
2008-01-01	57.0549073120717
2008-04-01	56.8140951483204
2008-07-01	56.9313616933673
2008-10-01	56.5235255491226
2009-01-01	56.4111714391822
2009-04-01	56.3113184046388
2009-07-01	56.0825367432285
2009-10-01	55.6308881189882
2010-01-01	55.3252969814580
2010-04-01	55.3886536928534
2010-07-01	55.0301054730680
2010-10-01	55.2559341555215
2011-01-01	54.9426562870121
2011-04-01	55.0329371993335
2011-07-01	54.8680565090285
2011-10-01	55.0155402418982
2012-01-01	55.0743670564147
2012-04-01	54.6270602768098
2012-07-01	54.6563156951156
2012-10-01	54.7089444788927
2013-01-01	55.0941821729852
2013-04-01	55.5372123134543
2013-07-01	55.2383147574277
2013-10-01	55.2422703025738
2014-01-01	55.1699568061126
2014-04-01	54.6789686842557
2014-07-01	55.0861573270976
2014-10-01	54.7952109076748
2015-01-01	54.7069126556911
2015-04-01	54.8361752394646
2015-07-01	54.7978408686713
2015-10-01	55.0712755396666
2016-01-01	55.1830129598355
2016-04-01	55.8485078675739
2016-07-01	55.7651479058115
2016-10-01	55.6175513042560
2017-01-01	55.9007304510586
2017-04-01	55.3423509388052
2017-07-01	55.5665311582216
2017-10-01	55.8258911896264
2018-01-01	55.7313226761360
2018-04-01	56.1364328460629