Quarter	Percent, Seasonally Adjusted
1999-01-01	59.6084314096545
1999-04-01	60.4089196317400
1999-07-01	60.9923064768736
1999-10-01	61.6902745663795
2000-01-01	62.1854507880708
2000-04-01	62.6229179888418
2000-07-01	63.1394767606778
2000-10-01	63.4222400674210
2001-01-01	60.7188550293647
2001-04-01	60.7740439835857
2001-07-01	61.5181890467889
2001-10-01	62.0647805958456
2002-01-01	63.6270629509398
2002-04-01	64.6571097841512
2002-07-01	65.3589701838071
2002-10-01	65.5935378593731
2003-01-01	66.3011215099328
2003-04-01	66.8323751203410
2003-07-01	67.5869015716692
2003-10-01	68.0424252388308
2004-01-01	68.2451413946448
2004-04-01	68.6962545339785
2004-07-01	69.3468603913479
2004-10-01	69.8968287531438
2005-01-01	69.3335488022418
2005-04-01	69.7926976227930
2005-07-01	69.7180412490532
2005-10-01	70.2873482533563
2006-01-01	70.9108053701579
2006-04-01	71.5961642773562
2006-07-01	72.0262823226621
2006-10-01	72.5390206623323
2007-01-01	72.8595845327814
2007-04-01	72.9967885452355
2007-07-01	73.5093382978822
2007-10-01	73.8070173560279
2008-01-01	74.3462427238137
2008-04-01	74.8620058071638
2008-07-01	75.4549605637480
2008-10-01	76.3606660970011
2009-01-01	76.8166346067347
2009-04-01	76.9416241382645
2009-07-01	77.3776335742404
2009-10-01	77.6455122302040
2010-01-01	78.1480604319910
2010-04-01	78.6623931786790
2010-07-01	78.9653584266029
2010-10-01	79.2274523105873
2011-01-01	79.2986126982491
2011-04-01	79.8619355400237
2011-07-01	79.7876675418606
2011-10-01	79.9416256112576
2012-01-01	80.8133776795674
2012-04-01	80.6383469395562
2012-07-01	81.3306938288006
2012-10-01	81.5397409473152
2013-01-01	81.6624791940951
2013-04-01	81.6912696374770
2013-07-01	81.8613120580489
2013-10-01	81.8991720428191
2014-01-01	81.9159861549904
2014-04-01	81.9260008915552
2014-07-01	81.9729910820794
2014-10-01	82.1955385871909
2015-01-01	81.9754077880990
2015-04-01	82.3481945583425
2015-07-01	81.7496686409372
2015-10-01	82.1006575254706
2016-01-01	82.1515099074971
2016-04-01	82.4684417258988
2016-07-01	82.4647498335599
2016-10-01	82.1773573243884
2017-01-01	82.2047411655688
2017-04-01	81.7929417295626
2017-07-01	82.0806154191878
2017-10-01	81.9646877989276
2018-01-01	81.8145760390043
2018-04-01	81.9519464706809
2018-07-01	81.8778906283371