Quarter	Percent, Seasonally Adjusted
1999-01-01	77.7810577840448
1999-04-01	77.6508740656408
1999-07-01	77.5375081114577
1999-10-01	77.3679692033798
2000-01-01	77.4633426379508
2000-04-01	77.7264156376208
2000-07-01	77.2314610453615
2000-10-01	77.1451409079957
2001-01-01	76.9821292379252
2001-04-01	76.7477285104616
2001-07-01	76.7217781885177
2001-10-01	76.3443838110676
2002-01-01	76.5170957599404
2002-04-01	76.4126222549404
2002-07-01	76.1908325049483
2002-10-01	76.3405380848479
2003-01-01	76.8159015919221
2003-04-01	76.4904327007435
2003-07-01	75.9912665365147
2003-10-01	76.1637913620506
2004-01-01	73.4825001809086
2004-04-01	73.3986488374613
2004-07-01	73.3244323962335
2004-10-01	73.1661319377676
2005-01-01	73.3827454827641
2005-04-01	73.6160462664277
2005-07-01	73.9955148212226
2005-10-01	73.9969732738184
2006-01-01	74.2680282127571
2006-04-01	74.7954108131525
2006-07-01	75.3459370095251
2006-10-01	75.3379707194577
2007-01-01	75.9587905355402
2007-04-01	76.2910530226311
2007-07-01	76.6249996377258
2007-10-01	76.3973507096056
2008-01-01	77.2011872382179
2008-04-01	77.1920353145237
2008-07-01	76.5081227196558
2008-10-01	76.4632369622757
2009-01-01	75.8481752280270
2009-04-01	75.3120109349611
2009-07-01	75.3305322482439
2009-10-01	75.6006946709065
2010-01-01	75.5608641748209
2010-04-01	75.6750949980940
2010-07-01	76.0486565612681
2010-10-01	76.5353919112612
2011-01-01	76.0403095101669
2011-04-01	76.2472720832804
2011-07-01	76.4557040784976
2011-10-01	76.1033517965970
2012-01-01	76.4409206506100
2012-04-01	76.3744360056691
2012-07-01	76.0042439102473
2012-10-01	76.0217815041663
2013-01-01	75.9832100103088
2013-04-01	76.2798561734301
2013-07-01	75.9907367507954
2013-10-01	75.7895624933198
2014-01-01	75.2648324050669
2014-04-01	75.1995387673043
2014-07-01	75.3590066751117
2014-10-01	75.1739769171398
2015-01-01	75.4544540811264
2015-04-01	74.9418507578729
2015-07-01	75.0883843300015
2015-10-01	75.0869657736147
2016-01-01	75.3312607568849
2016-04-01	75.1997910603992
2016-07-01	75.6253727719673
2016-10-01	75.5048795799377
2017-01-01	75.6358931078508
2017-04-01	76.1394697512118
2017-07-01	76.0516180223320
2017-10-01	76.8191698341423
2018-01-01	77.1408685140631
2018-04-01	77.5668185545705