Quarter	Percent, Seasonally Adjusted
1978-01-01	48.0111877364771
1978-04-01	48.4241529222637
1978-07-01	48.4179799898415
1978-10-01	48.6542739296728
1979-01-01	48.7579025341532
1979-04-01	48.6862005832864
1979-07-01	48.7719252677990
1979-10-01	48.8015815054418
1980-01-01	48.7845948034163
1980-04-01	48.8664551382439
1980-07-01	49.0440992610877
1980-10-01	48.6946781244471
1981-01-01	48.6355993863380
1981-04-01	48.8136810119556
1981-07-01	48.9389582760833
1981-10-01	49.2236990088317
1982-01-01	49.3219295039903
1982-04-01	49.1701107670326
1982-07-01	49.0974626892205
1982-10-01	49.6073654709129
1983-01-01	50.2512771015833
1983-04-01	50.2034007956051
1983-07-01	50.1958253595445
1983-10-01	50.1773741899186
1984-01-01	49.9140006096803
1984-04-01	50.1745296751855
1984-07-01	50.3393965612914
1984-10-01	50.3900814708336
1985-01-01	50.4261942657309
1985-04-01	50.2862628834376
1985-07-01	50.2639652175834
1985-10-01	50.0892438853818
1986-01-01	50.2880571687140
1986-04-01	50.1335405361249
1986-07-01	50.1593376871381
1986-10-01	50.1546685960220
1987-01-01	50.0868883558661
1987-04-01	50.2536903009265
1987-07-01	50.4202376425969
1987-10-01	50.6339048188949
1988-01-01	50.6631492806273
1988-04-01	50.8010203922041
1988-07-01	50.8772709588882
1988-10-01	50.9538940218647
1989-01-01	51.2520506834435
1989-04-01	51.6623547851145
1989-07-01	51.8608263358920
1989-10-01	52.0484484732312
1990-01-01	52.3735742584134
1990-04-01	52.4141778665759
1990-07-01	52.5948565294180
1990-10-01	52.6868674411672
1991-01-01	53.0215042698171
1991-04-01	53.1151335478390
1991-07-01	53.2446553822660
1991-10-01	53.3462216158192
1992-01-01	53.3292793070818
1992-04-01	53.3507309574157
1992-07-01	53.1974247645497
1992-10-01	53.2572417882417
1993-01-01	52.8214732378373
1993-04-01	52.7909098659508
1993-07-01	52.7809076356112
1993-10-01	52.7554465359673
1994-01-01	52.6176230216519
1994-04-01	52.7361560940022
1994-07-01	52.3834333048116
1994-10-01	52.4075698738546
1995-01-01	52.4488570182559
1995-04-01	52.3135461669872
1995-07-01	52.2628925540644
1995-10-01	52.1681937893517
1996-01-01	52.2390351439246
1996-04-01	52.4205914945829
1996-07-01	52.6280138103613
1996-10-01	52.5671193645423
1997-01-01	52.8399791227122
1997-04-01	52.8875419324508
1997-07-01	53.0936203326789
1997-10-01	52.9924387831630
1998-01-01	53.0466410200736
1998-04-01	52.6444410873409
1998-07-01	52.4271034060827
1998-10-01	52.2078656534444
1999-01-01	52.0400508236585
1999-04-01	52.0720564245644
1999-07-01	51.9400553008687
1999-10-01	51.8998820746045
2000-01-01	51.7757449142518
2000-04-01	51.8201755088125
2000-07-01	51.9089342686597
2000-10-01	52.0274128934814
2001-01-01	52.1179669451356
2001-04-01	51.8555545836997
2001-07-01	51.5871265261178
2001-10-01	51.6535762673880
2002-01-01	51.3311407804371
2002-04-01	51.1078775365132
2002-07-01	51.1983701328640
2002-10-01	51.3318206711904
2003-01-01	51.2043781019940
2003-04-01	51.3149057618595
2003-07-01	51.4198670505912
2003-10-01	51.4728521448400
2004-01-01	51.6985810357005
2004-04-01	51.7287088250180
2004-07-01	51.9380136557695
2004-10-01	51.9377953077852
2005-01-01	52.1441009230225
2005-04-01	52.3802371590870
2005-07-01	52.4862732610245
2005-10-01	52.3179503443016
2006-01-01	52.7140405740438
2006-04-01	52.7324926429859
2006-07-01	52.9573895538416
2006-10-01	53.1691072095888
2007-01-01	53.0235006726302
2007-04-01	53.4181608127866
2007-07-01	53.2920393830476
2007-10-01	53.4811378538158
2008-01-01	53.4169023928411
2008-04-01	53.5769074997622
2008-07-01	53.4261957829864
2008-10-01	53.5317588309314
2009-01-01	53.4787050033035
2009-04-01	53.3120467333426
2009-07-01	53.3393773231910
2009-10-01	53.3277848002637
2010-01-01	53.6748887309768
2010-04-01	53.5354900218463
2010-07-01	53.8212008175793
2010-10-01	53.9273218056196
2011-01-01	54.0477827876690
2011-04-01	53.7347486586693
2011-07-01	53.7974264839556
2011-10-01	54.1093471591488
2012-01-01	53.9165921085687
2012-04-01	54.1686803501773
2012-07-01	54.3151040941495
2012-10-01	54.4575561444709
2013-01-01	55.2253912039328
2013-04-01	55.3412504002742
2013-07-01	55.5515180585966
2013-10-01	56.1708351097914
2014-01-01	56.0396175324973
2014-04-01	56.2342566979232
2014-07-01	56.4012801585575
2014-10-01	56.9202485560846
2015-01-01	56.8557215029729
2015-04-01	57.0090571277593
2015-07-01	57.2761476821808
2015-10-01	57.5437235030429
2016-01-01	58.0798275251444
2016-04-01	58.0506955521514
2016-07-01	58.7689613510647
2016-10-01	58.9267898859111
2017-01-01	59.0719023381348
2017-04-01	59.6144013772301
2017-07-01	60.0743349816834
2017-10-01	60.3937921463449
2018-01-01	61.2852009703799
2018-04-01	61.7238230480556
2018-07-01	62.0299392377591