Quarter	Percent, Seasonally Adjusted
1978-04-01	51.4036356261759
1978-07-01	51.3996238320448
1978-10-01	51.3891176787535
1979-01-01	51.5327444515340
1979-04-01	51.3958877242238
1979-07-01	51.6579003452711
1979-10-01	52.6458447607914
1980-01-01	52.9335246427399
1980-04-01	52.7860370740255
1980-07-01	53.2819635313444
1980-10-01	52.8987966792845
1981-01-01	53.1807813301184
1981-04-01	53.5956835885283
1981-07-01	53.7622414406128
1981-10-01	54.0100644239217
1982-01-01	54.0247426907624
1982-04-01	53.7577027425775
1982-07-01	54.0784279731296
1982-10-01	54.1538574084160
1983-01-01	54.0065765552285
1983-04-01	53.6731980324367
1983-07-01	53.9379773997004
1983-10-01	53.9643611323990
1984-01-01	54.3817687930168
1984-04-01	55.2475006514716
1984-07-01	55.4819959469709
1984-10-01	56.0964232032907
1985-01-01	56.6622058974340
1985-04-01	56.5803532836492
1985-07-01	57.3338604508952
1985-10-01	58.4562223425040
1986-01-01	59.3212507051204
1986-04-01	60.3809880574730
1986-07-01	60.8810763892334
1986-10-01	61.1133269023160
1987-01-01	61.0985986582371
1987-04-01	61.5132095595159
1987-07-01	61.6838234565407
1987-10-01	61.9417625230172
1988-01-01	62.8663807043677
1988-04-01	63.3776768250453
1988-07-01	63.3399683374131
1988-10-01	63.7653201886774
1989-01-01	64.0134374715473
1989-04-01	64.9711891464230
1989-07-01	65.5790450050829
1989-10-01	66.3496201211439
1990-01-01	66.5685111536026
1990-04-01	67.0545865574317
1990-07-01	66.7966862123491
1990-10-01	66.7258527498447
1991-01-01	66.9348310474214
1991-04-01	67.5016122080590
1991-07-01	67.1152472271951
1991-10-01	66.6863962994537
1992-01-01	67.4422914727061
1992-04-01	67.1865524399029
1992-07-01	67.3237720547455
1992-10-01	67.1870956485210
1993-01-01	67.0474176000576
1993-04-01	66.6342121569289
1993-07-01	67.0236261638235
1993-10-01	67.8339780042613
1994-01-01	67.4250443754964
1994-04-01	67.4034607431020
1994-07-01	68.0533185465403
1994-10-01	68.0784195763169
1995-01-01	68.4126821920705
1995-04-01	68.9518113066882
1995-07-01	69.1907680974846
1995-10-01	69.4919631132692
1996-01-01	69.1930887082972
1996-04-01	68.7339155848001
1996-07-01	69.0256722324485
1996-10-01	69.1754921021760
1997-01-01	69.5353207470926
1997-04-01	69.3046772473218
1997-07-01	69.2330199529479
1997-10-01	69.2015538691338
1998-01-01	69.0334861091457
1998-04-01	69.2808054497939
1998-07-01	69.5105580727894
1998-10-01	69.4442013798991
1999-01-01	69.1130369050295
1999-04-01	69.1310864893192
1999-07-01	69.3457032596589
1999-10-01	69.9289933679470
2000-01-01	69.9615944072013
2000-04-01	70.4849813000547
2000-07-01	70.9630555609146
2000-10-01	70.4339779244242
2001-01-01	70.6312837520034
2001-04-01	71.4726269409838
2001-07-01	71.1774654022762
2001-10-01	71.1899403587634
2002-01-01	71.2607895225266
2002-04-01	71.0415898052697
2002-07-01	71.7372414105292
2002-10-01	72.2102245277614
2003-01-01	72.9355480360718
2003-04-01	72.7109486882043
2003-07-01	72.3335238973968
2003-10-01	71.9878376023486
2004-01-01	71.6537252707510
2004-04-01	71.5910160085579
2004-07-01	71.8132752735660
2004-10-01	72.3772843960014
2005-01-01	73.2792314054594
2005-04-01	73.7462791177846
2005-07-01	73.8004315571233
2005-10-01	73.8811831659087
2006-01-01	73.8204910629687
2006-04-01	74.2525802206936
2006-07-01	74.3551614697327
2006-10-01	74.4216267194809
2007-01-01	74.5997570105029
2007-04-01	74.4667806140630
2007-07-01	74.8681407761291
2007-10-01	75.2086191437213
2008-01-01	75.1856883907636
2008-04-01	75.3373185217747
2008-07-01	75.3541359058027
2008-10-01	75.6408594672027
2009-01-01	76.0702348264080
2009-04-01	75.8651237388750
2009-07-01	75.4270218231134
2009-10-01	74.8390843573421
2010-01-01	74.6685741709422
2010-04-01	74.8680378842504
2010-07-01	75.4039807091727
2010-10-01	75.6415885685229
2011-01-01	75.4784786590088
2011-04-01	75.6028178104515
2011-07-01	75.7550605294058
2011-10-01	75.7084428745388
2012-01-01	75.3911097177086
2012-04-01	75.4670094716571
2012-07-01	75.7273626077848
2012-10-01	75.6790121877668
2013-01-01	75.8541455370928
2013-04-01	75.9240947124660
2013-07-01	75.7243844480530
2013-10-01	75.7096750592601
2014-01-01	75.9415253745896
2014-04-01	75.7743559876878
2014-07-01	75.9256766266258
2014-10-01	75.8400700851068
2015-01-01	76.2782165753453
2015-04-01	76.4495343255970
2015-07-01	76.6814539962367
2015-10-01	76.8984635091396
2016-01-01	76.9092653532942
2016-04-01	76.8482271839201
2016-07-01	76.8342213605209
2016-10-01	76.9088454894524
2017-01-01	76.9854513776658
2017-04-01	77.5230975960862
2017-07-01	77.7293884069973
2017-10-01	78.5092648640307
2018-01-01	78.7119323463520
2018-04-01	78.6467103127918
2018-07-01	78.4552854061994