Quarter	Percent, Seasonally Adjusted
1998-01-01	65.3958944281525
1998-04-01	66.6341082242626
1998-07-01	66.0023446658851
1998-10-01	64.0667976424361
1999-01-01	64.3205303178007
1999-04-01	64.9912331969608
1999-07-01	64.3328161365400
1999-10-01	62.9113433991483
2000-01-01	64.5966337782937
2000-04-01	64.5881447267128
2000-07-01	64.8934127136547
2000-10-01	64.2089093701997
2001-01-01	64.1050210808739
2001-04-01	63.8208269525268
2001-07-01	63.1810361307589
2001-10-01	63.6363636363636
2002-01-01	65.1991614255765
2002-04-01	65.1702491915541
2002-07-01	64.5473524387930
2002-10-01	62.4218305855600
2003-01-01	63.8542846357116
2003-04-01	65.5827067669173
2003-07-01	65.7741995880921
2003-10-01	65.6657963446475
2004-01-01	63.6397400185701
2004-04-01	62.9232192414431
2004-07-01	61.6362631288004
2004-10-01	62.8807339449541
2005-01-01	62.7010233918129
2005-04-01	62.4431921468824
2005-07-01	62.0141023323088
2005-10-01	62.3808667505844
2006-01-01	62.1355750313003
2006-04-01	62.1535181236674
2006-07-01	63.4357344632768
2006-10-01	63.1338831373925
2007-01-01	63.3729050279330
2007-04-01	62.5975377145830
2007-07-01	63.1833074668046
2007-10-01	63.4585692228513
2008-01-01	62.7942681678608
2008-04-01	63.2698196665532
2008-07-01	63.0910015251652
2008-10-01	62.4936730217648
2009-01-01	62.7081581160639
2009-04-01	62.6257545271630
2009-07-01	62.6775864950694
2009-10-01	62.4021322671997
2010-01-01	62.0370370370370
2010-04-01	62.0899950552168
2010-07-01	61.7748562037798
2010-10-01	61.9983619983620
2011-01-01	62.8571428571428
2011-04-01	61.7737998372661
2011-07-01	61.5958481998054
2011-10-01	60.0582147477361
2012-01-01	60.5835885861680
2012-04-01	60.8032128514056
2012-07-01	60.0032010243278
2012-10-01	60.2232854864434
2013-01-01	60.9235668789809
2013-04-01	63.3211388579609
2013-07-01	62.9923761118170
2013-10-01	63.6522290972553
2014-01-01	64.4035532994924
2014-04-01	64.3117376841438
2014-07-01	63.3343878519456
2014-10-01	63.8603696098563
2015-01-01	64.3580012650221
2015-04-01	65.4410604386934
2015-07-01	64.7040302267003
2015-10-01	65.5930871956010
2016-01-01	64.5480225988701
2016-04-01	67.6898981989037
2016-07-01	68.2877247849883
2016-10-01	67.2545653191822
2017-01-01	68.0622568093385
2017-04-01	68.3646528964125
2017-07-01	69.6979085979860
2017-10-01	70.8700355431927
2018-01-01	69.2521202775636
2018-04-01	69.3325130729006