Quarter	Percent, Seasonally Adjusted
1999-01-01	56.8160716356408
1999-04-01	57.0799451723576
1999-07-01	57.8657146204603
1999-10-01	58.1989317320425
2000-01-01	58.3942486150042
2000-04-01	57.2082950717491
2000-07-01	58.6497016727251
2000-10-01	58.7054267120820
2001-01-01	57.6249541106615
2001-04-01	58.9511552278021
2001-07-01	61.2148841780006
2001-10-01	64.3909350442875
2002-01-01	60.3610336198311
2002-04-01	60.0437480214435
2002-07-01	61.2317970584036
2002-10-01	59.9961925172841
2003-01-01	62.1293029432125
2003-04-01	62.9601195764248
2003-07-01	65.3155614712256
2003-10-01	62.7180987335874
2004-01-01	62.8690500869630
2004-04-01	65.1927400435776
2004-07-01	64.6333470968252
2004-10-01	62.8706492620308
2005-01-01	63.6641740109746
2005-04-01	62.6455769899020
2005-07-01	62.3028645962462
2005-10-01	62.4337208050906
2006-01-01	63.0237275739783
2006-04-01	63.0182798738754
2006-07-01	63.0774113852599
2006-10-01	63.4828353148122
2007-01-01	61.7832993579487
2007-04-01	61.3784936313399
2007-07-01	61.4991005733412
2007-10-01	59.4178748160718
2008-01-01	60.1343645154756
2008-04-01	60.2243163328693
2008-07-01	60.3368621633563
2008-10-01	59.0380663283330
2009-01-01	58.9629660662131
2009-04-01	61.2042418782013
2009-07-01	61.4933787710526
2009-10-01	61.3528842036700
2010-01-01	61.2783613681040
2010-04-01	61.6946004452725
2010-07-01	62.6907219357192
2010-10-01	61.5919898229904
2011-01-01	62.6810802594515
2011-04-01	62.8396378109505
2011-07-01	63.4268013332463
2011-10-01	63.7617887584249
2012-01-01	64.1991384264812
2012-04-01	64.5722883609049
2012-07-01	64.0430589177536
2012-10-01	64.6919608978628
2013-01-01	64.3482364369677
2013-04-01	64.9826782074968
2013-07-01	65.6985608943954
2013-10-01	64.9433720659956
2014-01-01	65.0524433962031
2014-04-01	65.9845723386842
2014-07-01	66.8876278383960
2014-10-01	67.7617017711285
2015-01-01	67.9964741437552
2015-04-01	67.9046602123426
2015-07-01	67.0493670376200
2015-10-01	67.5918882865738
2016-01-01	69.3275771730254
2016-04-01	70.9028752581688
2016-07-01	71.4234514877914
2016-10-01	70.7856190036095
2017-01-01	70.0792441112468
2017-04-01	72.0354316968254
2017-07-01	72.3674683237744
2017-10-01	71.9526617897441
2018-01-01	71.7891888577057
2018-04-01	73.3541857756460