Quarter	Percent, Seasonally Adjusted
1999-01-01	77.0997360968167
1999-04-01	76.7921272225193
1999-07-01	76.8274548014708
1999-10-01	76.7979774310199
2000-01-01	75.9035292585976
2000-04-01	76.3188299463898
2000-07-01	75.9877815121540
2000-10-01	76.4557064179615
2001-01-01	76.4344842324654
2001-04-01	75.8777602523442
2001-07-01	76.7551524892598
2001-10-01	77.2884324098085
2002-01-01	76.1244221033137
2002-04-01	76.4690714814186
2002-07-01	76.7420432902566
2002-10-01	75.9865573881848
2003-01-01	76.9077561616838
2003-04-01	76.9094309561149
2003-07-01	76.7956362529154
2003-10-01	76.3122983214727
2004-01-01	76.8796037860779
2004-04-01	77.0609296124307
2004-07-01	77.5950793842038
2004-10-01	76.3657656065008
2005-01-01	76.8833385261974
2005-04-01	76.5134065684981
2005-07-01	75.9972744821105
2005-10-01	76.2395332891264
2006-01-01	76.0294249202235
2006-04-01	76.2103259850595
2006-07-01	76.6453768301793
2006-10-01	76.9549310788283
2007-01-01	77.0052899804159
2007-04-01	76.3060162066411
2007-07-01	75.6710715305649
2007-10-01	75.5286167445548
2008-01-01	75.6966723066788
2008-04-01	76.5490567537274
2008-07-01	76.7862363858283
2008-10-01	76.5504447965026
2009-01-01	76.0753218189732
2009-04-01	75.5698116904040
2009-07-01	75.4345624038966
2009-10-01	74.2733101689443
2010-01-01	74.8180076948541
2010-04-01	74.5135763214175
2010-07-01	73.4653326162899
2010-10-01	74.0418880893787
2011-01-01	73.9948356378425
2011-04-01	73.6357085373692
2011-07-01	73.4235613721170
2011-10-01	73.2748893128243
2012-01-01	73.0998961159050
2012-04-01	72.9151521040395
2012-07-01	71.9936132274157
2012-10-01	72.4292029809068
2013-01-01	72.3154275728987
2013-04-01	71.3301909828519
2013-07-01	71.2736074304371
2013-10-01	70.8207187091402
2014-01-01	71.2945244342130
2014-04-01	71.3332285570474
2014-07-01	72.2147386689970
2014-10-01	72.2853239185628
2015-01-01	72.2585128995106
2015-04-01	72.1969976768270
2015-07-01	71.8795033793859
2015-10-01	72.7111413652365
2016-01-01	73.2224797907649
2016-04-01	73.7687720493260
2016-07-01	73.5728274398556
2016-10-01	73.5522598066856
2017-01-01	72.1429586188618
2017-04-01	72.1845867689592
2017-07-01	72.2188456186407
2017-10-01	72.3902533061484
2018-01-01	72.1383723657892
2018-04-01	72.9622960604142