Quarter	Percent, Seasonally Adjusted
1981-01-01	55.5947254332656
1981-04-01	55.9830966024367
1981-07-01	56.2782166327008
1981-10-01	57.1356942289676
1982-01-01	57.2542939667092
1982-04-01	56.8363898986412
1982-07-01	56.7534616806270
1982-10-01	57.5697876809067
1983-01-01	58.2243577922109
1983-04-01	58.1304059673641
1983-07-01	58.5141180008591
1983-10-01	58.2962704011586
1984-01-01	58.1858762907569
1984-04-01	58.5740833051153
1984-07-01	58.9770517488110
1984-10-01	59.2859002959060
1985-01-01	59.1010509223317
1985-04-01	59.0877282130847
1985-07-01	59.5041185744534
1985-10-01	59.2985542466664
1986-01-01	59.5892163565130
1986-04-01	59.6708411679023
1986-07-01	59.6943499740114
1986-10-01	59.5356376039954
1987-01-01	59.6247626912987
1987-04-01	60.1213249423498
1987-07-01	60.3504954056150
1987-10-01	60.4795845683158
1988-01-01	60.7460752503361
1988-04-01	61.2470018018370
1988-07-01	61.2209622590471
1988-10-01	61.0996805821460
1989-01-01	61.6640877138204
1989-04-01	62.4027975826950
1989-07-01	62.4515938565173
1989-10-01	62.6046870466988
1990-01-01	63.4504308763506
1990-04-01	63.0669357341606
1990-07-01	63.1992077047104
1990-10-01	63.2521339556738
1991-01-01	64.0519868703792
1991-04-01	63.5331833384541
1991-07-01	63.9842094744785
1991-10-01	64.4676452758895
1992-01-01	64.0881234572698
1992-04-01	64.0560040422106
1992-07-01	63.9763045650264
1992-10-01	64.6856151205550
1993-01-01	63.4897620993911
1993-04-01	63.6241200992427
1993-07-01	63.5881048834490
1993-10-01	64.0134800887495
1994-01-01	63.4564602016360
1994-04-01	64.0589773047255
1994-07-01	63.2544244888095
1994-10-01	63.2751266378411
1995-01-01	63.3796163157534
1995-04-01	63.4348449784448
1995-07-01	63.3994561129574
1995-10-01	63.0266482092756
1996-01-01	63.7182320890566
1996-04-01	63.6664494973979
1996-07-01	63.9322310688395
1996-10-01	63.8524643205277
1997-01-01	64.5353406295639
1997-04-01	64.4804639224056
1997-07-01	64.7405072526861
1997-10-01	64.5309254867828
1998-01-01	64.6802947650310
1998-04-01	64.0527535404631
1998-07-01	63.9869472102617
1998-10-01	63.6900305949656
1999-01-01	63.4121357893004
1999-04-01	63.5263893279557
1999-07-01	63.7803746293662
1999-10-01	63.6935877954814
2000-01-01	63.1645485676521
2000-04-01	63.8955546365978
2000-07-01	63.7568776786639
2000-10-01	63.7986915928660
2001-01-01	64.5487723001414
2001-04-01	64.1081097411594
2001-07-01	63.9050717629253
2001-10-01	64.2766701951565
2002-01-01	63.9137471499240
2002-04-01	63.4902481446871
2002-07-01	63.8334881247115
2002-10-01	64.5189440820902
2003-01-01	64.1666735716354
2003-04-01	64.6034830377176
2003-07-01	64.4067225842831
2003-10-01	64.8079737368532
2004-01-01	65.1107926721703
2004-04-01	64.8636015451479
2004-07-01	65.4758155893661
2004-10-01	65.1519511518713
2005-01-01	65.5210381888655
2005-04-01	65.9016607155997
2005-07-01	66.0964922301152
2005-10-01	65.7059394192597
2006-01-01	66.4311356070821
2006-04-01	66.6916571167944
2006-07-01	66.8767151775578
2006-10-01	66.7755949940553
2007-01-01	66.8651961094122
2007-04-01	67.8503689770266
2007-07-01	67.2600771816438
2007-10-01	67.8714905782708
2008-01-01	67.5247885211082
2008-04-01	67.3959486191003
2008-07-01	67.5669882528865
2008-10-01	68.0576829940264
2009-01-01	67.9734647751843
2009-04-01	67.2973932453196
2009-07-01	67.8547254415585
2009-10-01	67.9087368093786
2010-01-01	68.1352116821056
2010-04-01	68.0656575189352
2010-07-01	68.5528311624291
2010-10-01	68.3834303411667
2011-01-01	68.8904167203006
2011-04-01	69.1059030593848
2011-07-01	69.1633982216390
2011-10-01	69.0534824550964
2012-01-01	68.7106541805662
2012-04-01	69.4547664302916
2012-07-01	69.1238750944659
2012-10-01	69.4628935366651
2013-01-01	70.4174912874472
2013-04-01	70.8102944244154
2013-07-01	70.7867102907840
2013-10-01	71.4871724504476
2014-01-01	71.5137595617849
2014-04-01	71.6637287959985
2014-07-01	72.0437942529859
2014-10-01	72.7243757757556
2015-01-01	72.6901438897394
2015-04-01	72.6134709845526
2015-07-01	73.0420816261255
2015-10-01	73.0313876190100
2016-01-01	73.6228731356772
2016-04-01	73.7010821900221
2016-07-01	74.3597097760066
2016-10-01	74.4674454668101
2017-01-01	74.6296861002376
2017-04-01	75.2678445494779
2017-07-01	75.4945995465419
2017-10-01	76.0452580174418
2018-01-01	76.6080803503685
2018-04-01	77.0768543181028
2018-07-01	77.3051860642601