Quarter	Percent, Seasonally Adjusted
1981-01-01	56.7004710414092
1981-04-01	57.1765818217245
1981-07-01	57.3305065698842
1981-10-01	58.2396830807396
1982-01-01	58.3704876444750
1982-04-01	58.0526964852527
1982-07-01	57.9830422621238
1982-10-01	58.9284758309590
1983-01-01	59.6943377703637
1983-04-01	59.6131867750655
1983-07-01	60.0993361916502
1983-10-01	59.8075197993730
1984-01-01	59.7609337399621
1984-04-01	60.1464545733737
1984-07-01	60.5508404109981
1984-10-01	60.8716185222961
1985-01-01	60.5595007987918
1985-04-01	60.5735082985909
1985-07-01	61.0547517098876
1985-10-01	60.8334783707663
1986-01-01	61.1620418016948
1986-04-01	61.2363472507374
1986-07-01	61.3356581493149
1986-10-01	61.1358365397646
1987-01-01	61.3160627880310
1987-04-01	61.8805233954817
1987-07-01	61.8414051787803
1987-10-01	62.0201651625191
1988-01-01	62.2644090472687
1988-04-01	62.6763482791973
1988-07-01	62.7656684739268
1988-10-01	62.6160006298334
1989-01-01	63.1079761275260
1989-04-01	63.7067064289513
1989-07-01	63.7531041271230
1989-10-01	63.9554889543499
1990-01-01	64.7401612800824
1990-04-01	64.4190796018164
1990-07-01	64.5360411802996
1990-10-01	64.5262315534978
1991-01-01	65.2904296407039
1991-04-01	64.9652859274884
1991-07-01	65.3910669597130
1991-10-01	65.7648487286944
1992-01-01	65.4827595638705
1992-04-01	65.3483687475482
1992-07-01	65.3288575057866
1992-10-01	66.1949598759468
1993-01-01	64.9835616752706
1993-04-01	65.1426426336881
1993-07-01	65.1780077095759
1993-10-01	65.7553304661171
1994-01-01	65.2961410555651
1994-04-01	65.8331162901472
1994-07-01	65.1256326371458
1994-10-01	65.1225259541784
1995-01-01	65.2875361407895
1995-04-01	65.3922887086740
1995-07-01	65.4067777835777
1995-10-01	65.0955753688891
1996-01-01	65.7006573882002
1996-04-01	65.6867976860016
1996-07-01	65.9519659458375
1996-10-01	65.9582914542571
1997-01-01	66.6668104167131
1997-04-01	66.7095649005323
1997-07-01	66.8684060949558
1997-10-01	66.7677722017484
1998-01-01	66.9055387916676
1998-04-01	66.5871784708494
1998-07-01	66.7444618729642
1998-10-01	66.4955205868547
1999-01-01	66.3588273232011
1999-04-01	66.4116746935499
1999-07-01	66.7740277959419
1999-10-01	66.5598185199353
2000-01-01	66.1605269039813
2000-04-01	66.8610821769457
2000-07-01	66.6058901751416
2000-10-01	66.6308853562296
2001-01-01	67.4956085445639
2001-04-01	67.1203161658966
2001-07-01	67.0410685031268
2001-10-01	67.5864563341439
2002-01-01	67.4129601768552
2002-04-01	66.9608615445412
2002-07-01	67.3159535327340
2002-10-01	68.0269964211658
2003-01-01	67.5286872128004
2003-04-01	67.9341038829298
2003-07-01	67.7312525262828
2003-10-01	68.0599047379099
2004-01-01	68.2070899421001
2004-04-01	67.9556304573609
2004-07-01	68.4706897200808
2004-10-01	68.0418683045638
2005-01-01	68.5685368077206
2005-04-01	68.9237585188762
2005-07-01	69.0861868324225
2005-10-01	68.7975254362197
2006-01-01	69.1484762252769
2006-04-01	69.3898236524144
2006-07-01	69.6310694892492
2006-10-01	69.4829029621285
2007-01-01	69.6430570482206
2007-04-01	70.4866044408743
2007-07-01	69.9010450979522
2007-10-01	70.5959896487244
2008-01-01	70.3477012753231
2008-04-01	70.3256147153280
2008-07-01	70.4081747006627
2008-10-01	70.9995655819602
2009-01-01	71.3072123623748
2009-04-01	70.8041175214606
2009-07-01	71.6612872654155
2009-10-01	71.6695055301839
2010-01-01	71.6497252891272
2010-04-01	71.4966442649704
2010-07-01	71.9861970644549
2010-10-01	71.8106674084468
2011-01-01	72.1725677921549
2011-04-01	72.3549659853025
2011-07-01	72.2434897132142
2011-10-01	72.0782118790324
2012-01-01	71.8885266871306
2012-04-01	72.5122391931444
2012-07-01	72.1039193816089
2012-10-01	72.4216493897714
2013-01-01	73.3289459073324
2013-04-01	73.7226405681113
2013-07-01	73.6068540133849
2013-10-01	74.3133025759530
2014-01-01	74.2637924728754
2014-04-01	74.3637539556054
2014-07-01	74.7584200639206
2014-10-01	75.2563276341716
2015-01-01	75.1823179479474
2015-04-01	75.0666568811141
2015-07-01	75.5555066563466
2015-10-01	75.5219128079080
2016-01-01	75.9785544277114
2016-04-01	76.0884225982002
2016-07-01	76.5704148584980
2016-10-01	76.7390513459826
2017-01-01	76.8591209450763
2017-04-01	77.4168889928810
2017-07-01	77.5512893263141
2017-10-01	78.1633694118486
2018-01-01	78.6438521351534
2018-04-01	78.8173585804054
2018-07-01	79.2098961511939