Quarter	Percent, Seasonally Adjusted
1981-01-01	12.4545209540493
1981-04-01	11.3335128504323
1981-07-01	12.2360288436776
1981-10-01	10.6995225430192
1982-01-01	13.4885687110297
1982-04-01	12.4109384542308
1982-07-01	13.7191657808892
1982-10-01	12.8447983094978
1983-01-01	13.0953251883825
1983-04-01	13.2539682539683
1983-07-01	14.1064174125574
1983-10-01	12.0705635195255
1984-01-01	12.4083216803173
1984-04-01	11.8163068166984
1984-07-01	12.0730270906949
1984-10-01	11.0736679280723
1985-01-01	12.4874517884504
1985-04-01	11.7779373055755
1985-07-01	12.4578540261801
1985-10-01	11.3952020202020
1986-01-01	12.5358783008037
1986-04-01	12.3263150828989
1986-07-01	13.0094631312658
1986-10-01	12.2119279296057
1987-01-01	12.7134768888064
1987-04-01	12.7370684973170
1987-07-01	13.3046436698736
1987-10-01	11.5719437880861
1988-01-01	11.9478624388705
1988-04-01	12.6257987610654
1988-07-01	13.3833940336375
1988-10-01	12.1077472994056
1989-01-01	13.1040683299618
1989-04-01	12.7854365500177
1989-07-01	14.1470778520595
1989-10-01	12.8774983264799
1990-01-01	14.0923010798904
1990-04-01	14.1752440811426
1990-07-01	15.8105466896905
1990-10-01	13.9979464202371
1991-01-01	15.4420447186988
1991-04-01	15.4674097142545
1991-07-01	16.1519399341643
1991-10-01	15.1712399229374
1992-01-01	15.9554078528600
1992-04-01	15.7506623242942
1992-07-01	16.1336138874277
1992-10-01	14.2053203058917
1993-01-01	15.5166936687951
1993-04-01	14.9327692558023
1993-07-01	16.4669513184274
1993-10-01	14.0339464190668
1994-01-01	15.9164401201889
1994-04-01	14.2503129550622
1994-07-01	13.6358218443323
1994-10-01	11.9764331853048
1995-01-01	12.9497915279773
1995-04-01	12.4586951072218
1995-07-01	13.9520891912135
1995-10-01	12.7660351184609
1996-01-01	13.8019986056240
1996-04-01	13.2627187017358
1996-07-01	14.1988418108601
1996-10-01	13.0283135002052
1997-01-01	13.3345364600473
1997-04-01	12.2017628412151
1997-07-01	13.1589533176452
1997-10-01	11.9186472467251
1998-01-01	12.9060244639571
1998-04-01	12.4681294548974
1998-07-01	13.4190892222050
1998-10-01	12.0309100593105
1999-01-01	12.7015227154794
1999-04-01	12.2733612273361
1999-07-01	13.4531845809483
1999-10-01	12.3102894965568
2000-01-01	12.7958296282397
2000-04-01	12.2735528337913
2000-07-01	13.4263613660688
2000-10-01	12.2508341175464
2001-01-01	13.1974502242858
2001-04-01	12.5772525208717
2001-07-01	14.2378198553810
2001-10-01	13.4862763981564
2002-01-01	13.8145660499121
2002-04-01	13.5664157609128
2002-07-01	14.5571976625605
2002-10-01	13.3493737950060
2003-01-01	14.0451579097795
2003-04-01	13.7222149794668
2003-07-01	15.7046434651848
2003-10-01	15.0431764307484
2004-01-01	15.4384844091702
2004-04-01	14.1332480514072
2004-07-01	14.8302255895915
2004-10-01	14.2291897014690
2005-01-01	14.7661633845536
2005-04-01	13.9422502862200
2005-07-01	14.6256889440450
2005-10-01	13.7848388300468
2006-01-01	14.4730692226664
2006-04-01	13.9572271984220
2006-07-01	14.6329468157322
2006-10-01	13.6954707945272
2007-01-01	14.2814684636955
2007-04-01	14.2535078139470
2007-07-01	14.5885451825967
2007-10-01	14.5916394426295
2008-01-01	15.6614703404497
2008-04-01	14.5196532908397
2008-07-01	14.6548059991499
2008-10-01	14.2415165970245
2009-01-01	17.9721211684616
2009-04-01	17.3429691256393
2009-07-01	16.6928647818379
2009-10-01	16.1090580834438
2010-01-01	17.3480423967121
2010-04-01	16.7357967183943
2010-07-01	16.1987920753012
2010-10-01	15.7173848042802
2011-01-01	16.3941987073613
2011-04-01	16.4038438581831
2011-07-01	16.0160308742764
2011-10-01	14.7212977887035
2012-01-01	16.2239592340239
2012-04-01	16.1698202353365
2012-07-01	16.3126617519064
2012-10-01	15.3728123305530
2013-01-01	16.9113702052048
2013-04-01	16.2596275183848
2013-07-01	16.2354463130660
2013-10-01	15.2908985379066
2014-01-01	16.5663912674452
2014-04-01	16.0389974112743
2014-07-01	15.7522709188050
2014-10-01	15.1563183490724
2015-01-01	16.6752345129816
2015-04-01	16.4688119837769
2015-07-01	15.9243057262227
2015-10-01	15.5769810183790
2016-01-01	16.9379358787818
2016-04-01	16.7551775111116
2016-07-01	16.1513407616016
2016-10-01	15.8068204414396
2017-01-01	16.8393150206460
2017-04-01	15.8720606666637
2017-07-01	16.2591477359354
2017-10-01	15.7006469237210
2018-01-01	16.5808905795480
2018-04-01	15.8170251490487