Quarter	Percent, Seasonally Adjusted
1998-01-01	64.4028082881118
1998-04-01	64.5502754995623
1998-07-01	64.7247570350197
1998-10-01	64.5786033747975
1999-01-01	64.2394019808281
1999-04-01	63.7552315230674
1999-07-01	63.4896598486644
1999-10-01	63.3742035972307
2000-01-01	63.7133330019282
2000-04-01	63.7983858108030
2000-07-01	63.8764951422647
2000-10-01	64.0160383978841
2001-01-01	63.5846673722574
2001-04-01	63.4903263528793
2001-07-01	63.4826814665711
2001-10-01	63.3118436937353
2002-01-01	63.3686594021085
2002-04-01	64.0028069333977
2002-07-01	64.1223161546532
2002-10-01	64.4213236609080
2003-01-01	64.8419860282034
2003-04-01	64.7098239300500
2003-07-01	64.8397890231597
2003-10-01	64.8845337710663
2004-01-01	64.5506588491601
2004-04-01	64.8456088868751
2004-07-01	64.7450716290518
2004-10-01	64.9682050051019
2005-01-01	65.2406323615620
2005-04-01	65.2719579751124
2005-07-01	65.0560988421154
2005-10-01	65.4898319522946
2006-01-01	65.8748160171512
2006-04-01	65.7450421923546
2006-07-01	65.9645080389400
2006-10-01	66.1382587629543
2007-01-01	66.1513158957260
2007-04-01	66.1195204549555
2007-07-01	66.3435333923286
2007-10-01	66.5025994702032
2008-01-01	66.6538010817807
2008-04-01	66.7594892430608
2008-07-01	66.4960561668301
2008-10-01	66.3747841460440
2009-01-01	65.7429864961581
2009-04-01	65.5500285524147
2009-07-01	65.3611077912300
2009-10-01	64.8823888502993
2010-01-01	64.3914310668613
2010-04-01	63.2936867002527
2010-07-01	62.6050589082128
2010-10-01	61.6971197078438
2011-01-01	60.4074096365588
2011-04-01	59.2708325460252
2011-07-01	57.7392811601672
2011-10-01	56.0600331285600
2012-01-01	55.1035117586670
2012-04-01	53.6393314731266
2012-07-01	52.6785743589698
2012-10-01	52.3303071556882
2013-01-01	51.5749105861148
2013-04-01	51.3907317906931
2013-07-01	51.2143087113972
2013-10-01	51.2165103071888
2014-01-01	51.3100849203221
2014-04-01	51.2448872232675
2014-07-01	51.4563314576650
2014-10-01	51.4269092784400
2015-01-01	51.6182522001701
2015-04-01	52.1720054144654
2015-07-01	52.6938457667577
2015-10-01	53.2829797435286
2016-01-01	53.5131543095543
2016-04-01	53.8749261280104
2016-07-01	54.0028968461026
2016-10-01	54.0650169193858
2017-01-01	54.5771134986942
2017-04-01	55.2238815187866
2017-07-01	55.8715887956421
2017-10-01	55.9278831026890
2018-01-01	56.3341549195157
2018-04-01	56.9294530996367