Quarter	Percent, Seasonally Adjusted
1999-04-01	73.1398716568928
1999-07-01	72.8479594235382
1999-10-01	72.6063441933945
2000-01-01	72.6842232494413
2000-04-01	72.2275214520650
2000-07-01	72.1183181127254
2000-10-01	71.5825793768571
2001-01-01	70.9435478573584
2001-04-01	70.8760358452565
2001-07-01	70.3929102638653
2001-10-01	70.1363079735678
2002-01-01	69.4574683183049
2002-04-01	68.8047401265342
2002-07-01	68.2905260855770
2002-10-01	67.2636403206172
2003-01-01	66.9368714060637
2003-04-01	66.1889179897827
2003-07-01	65.7587894609119
2003-10-01	65.8074282836171
2004-01-01	65.7154645063191
2004-04-01	65.7930679089520
2004-07-01	66.3413496617875
2004-10-01	64.3839873929345
2005-01-01	63.2014139444150
2005-04-01	61.9830106903386
2005-07-01	61.6409272260469
2005-10-01	60.3174416174314
2006-01-01	60.3513525369048
2006-04-01	59.7155064325370
2006-07-01	59.8617635682504
2006-10-01	60.1207204314156
2007-01-01	59.5090097319478
2007-04-01	59.1746507874280
2007-07-01	59.2239578750631
2007-10-01	57.9967536225230
2008-01-01	58.1906670927994
2008-04-01	57.3988699453462
2008-07-01	56.5540544949224
2008-10-01	56.9253909343279
2009-01-01	56.0899840624842
2009-04-01	56.6857442001587
2009-07-01	55.8189982055487
2009-10-01	55.7205349939500
2010-01-01	54.8457881265011
2010-04-01	53.9876466632046
2010-07-01	53.4984988143309
2010-10-01	54.2250628280600
2011-01-01	53.6370257857972
2011-04-01	53.0952441679665
2011-07-01	52.8331151385534
2011-10-01	52.6309446849412
2012-01-01	53.3786177053840
2012-04-01	53.2989257270909
2012-07-01	53.1625740145990
2012-10-01	52.8369638840667
2013-01-01	51.9303625242206
2013-04-01	51.5561654321365
2013-07-01	51.8646059318475
2013-10-01	51.1359625552217
2014-01-01	51.2126045585570
2014-04-01	50.7657390241303
2014-07-01	50.6811837682890
2014-10-01	50.4784077340230
2015-01-01	50.8527318672128
2015-04-01	49.9899907749355
2015-07-01	49.5438718853897
2015-10-01	49.4061539577673
2016-01-01	48.3070525341339
2016-04-01	48.4124096878155
2016-07-01	48.2593567423571
2016-10-01	47.4466182882545
2017-01-01	46.8895198058545
2017-04-01	46.2509762245157
2017-07-01	46.9964644271248
2017-10-01	45.2209120200554
2018-01-01	46.6378186680311
2018-04-01	45.9271232938522