Quarter	Percent, Seasonally Adjusted
1999-04-01	58.5355109148829
1999-07-01	59.1809425366776
1999-10-01	59.6208525997228
2000-01-01	59.9890877281258
2000-04-01	60.4656746880314
2000-07-01	60.7326096240398
2000-10-01	60.8241813811428
2001-01-01	61.0305998957710
2001-04-01	61.0715091497398
2001-07-01	61.3583424309081
2001-10-01	61.2463161977749
2002-01-01	61.0894144737250
2002-04-01	61.0269991259281
2002-07-01	60.8010124336408
2002-10-01	60.7355247041787
2003-01-01	60.7834189556434
2003-04-01	60.9460421127257
2003-07-01	60.8416117561510
2003-10-01	61.2251780612056
2004-01-01	61.4312940456941
2004-04-01	61.3341824689093
2004-07-01	61.6671760436881
2004-10-01	62.1204031948428
2005-01-01	62.4698544770019
2005-04-01	62.8245093981808
2005-07-01	63.1981822256777
2005-10-01	63.3316483920654
2006-01-01	63.7913386776232
2006-04-01	63.8795961738238
2006-07-01	64.1164072116662
2006-10-01	64.4729307751499
2007-01-01	67.2160852460936
2007-04-01	67.1857260955216
2007-07-01	67.1277492143544
2007-10-01	66.8959775562966
2008-01-01	66.5671245535203
2008-04-01	65.8330314612419
2008-07-01	64.7731747807900
2008-10-01	63.4247216907495
2009-01-01	61.1842665950677
2009-04-01	59.8218467288172
2009-07-01	58.6986825441201
2009-10-01	57.9934569330184
2010-01-01	57.4990912213942
2010-04-01	57.0797948025212
2010-07-01	56.7016819648747
2010-10-01	56.0631820278949
2011-01-01	55.9976705973864
2011-04-01	56.0086398100491
2011-07-01	55.5073272517184
2011-10-01	55.7365556650204
2012-01-01	55.4897821972040
2012-04-01	55.4240185149998
2012-07-01	55.5277523765101
2012-10-01	55.7294561308192
2013-01-01	56.2958606503059
2013-04-01	56.8167147675390
2013-07-01	57.3616056767224
2013-10-01	57.6686414299542
2014-01-01	57.7187054427689
2014-04-01	57.7773346686404
2014-07-01	58.3119427541722
2014-10-01	58.7962900830980
2015-01-01	59.0783633059062
2015-04-01	59.4657947163205
2015-07-01	59.7373369986824
2015-10-01	59.9616873806272
2016-01-01	60.3784646606319
2016-04-01	60.9759399956104
2016-07-01	61.3031598278140
2016-10-01	61.4370438891297
2017-01-01	61.6944028484364
2017-04-01	61.7818013350279
2017-07-01	62.0108360276965
2017-10-01	62.5177917839629
2018-01-01	62.7433973825053
2018-04-01	62.8731253267973