Quarter	Percent, Seasonally Adjusted
1998-01-01	57.8804423140308
1998-04-01	58.3500880402536
1998-07-01	58.0069360063891
1998-10-01	58.6093434746490
1999-01-01	59.1104388852645
1999-04-01	59.4166240311915
1999-07-01	59.7032204470956
1999-10-01	59.8848082176900
2000-01-01	60.3423117022061
2000-04-01	60.3039225472738
2000-07-01	60.6894903238452
2000-10-01	60.7964597976460
2001-01-01	61.2492343693227
2001-04-01	61.0217764669349
2001-07-01	61.3216148091760
2001-10-01	61.6367023568160
2002-01-01	61.5066968533896
2002-04-01	61.5186530560332
2002-07-01	61.4936180929150
2002-10-01	60.9518962580318
2003-01-01	61.6187639649048
2003-04-01	61.2299239371452
2003-07-01	61.2961764688673
2003-10-01	61.2306878517281
2004-01-01	61.2129060885080
2004-04-01	61.2918338199586
2004-07-01	61.4379669417551
2004-10-01	61.9206491693807
2005-01-01	61.4549519051963
2005-04-01	61.5808090876156
2005-07-01	61.5909631054514
2005-10-01	61.6733819923913
2006-01-01	61.6488430414780
2006-04-01	62.0109158172592
2006-07-01	61.9897076427953
2006-10-01	61.6482954719409
2007-01-01	61.5580375221434
2007-04-01	61.4124132481247
2007-07-01	62.1835018805252
2007-10-01	62.1012059721961
2008-01-01	62.3086227270712
2008-04-01	62.8343979677992
2008-07-01	62.4879979387016
2008-10-01	62.2730155346755
2009-01-01	62.1785463812979
2009-04-01	61.5330810443907
2009-07-01	61.0314496735073
2009-10-01	61.3314620227085
2010-01-01	61.5454217672416
2010-04-01	61.0113411988705
2010-07-01	60.6858636791030
2010-10-01	60.7058277719912
2011-01-01	60.6165615354918
2011-04-01	60.6470934796197
2011-07-01	59.9025636437633
2011-10-01	59.1864334048826
2012-01-01	59.0619769891693
2012-04-01	58.8136472964670
2012-07-01	58.6682895698966
2012-10-01	57.3936375878980
2013-01-01	57.1567390603864
2013-04-01	57.3328891258845
2013-07-01	58.2429898208050
2013-10-01	58.9468717071227
2014-01-01	59.2634959617645
2014-04-01	59.2557037133408
2014-07-01	59.9415225540766
2014-10-01	60.1287690523130
2015-01-01	60.2833739768033
2015-04-01	61.4574143013629
2015-07-01	61.3571277752894
2015-10-01	61.3546318093307
2016-01-01	61.8146823102334
2016-04-01	61.8756830213661
2016-07-01	62.7936217188265
2016-10-01	63.2578573895635
2017-01-01	63.7425548534655
2017-04-01	64.2366669354904
2017-07-01	65.2207150102510
2017-10-01	65.8292554420382
2018-01-01	66.3420430676764
2018-04-01	66.8763220112726