Quarter	Percent
1986-01-01	77.1576898118105
1986-04-01	73.4890558640967
1986-07-01	72.4222989639862
1986-10-01	74.8680738786280
1987-01-01	75.3263923318460
1987-04-01	73.2646961142478
1987-07-01	71.4547881214548
1987-10-01	73.8795986622074
1988-01-01	72.6250419603894
1988-04-01	69.5608108108108
1988-07-01	67.8049609242270
1988-10-01	69.8225861480723
1989-01-01	69.7239842276702
1989-04-01	66.4307904729030
1989-07-01	65.3192227619708
1989-10-01	69.3604449078902
1990-01-01	68.8065414057063
1990-04-01	68.6103351955307
1990-07-01	66.9760112064437
1990-10-01	69.5568400770713
1991-01-01	69.0017513134851
1991-04-01	66.3333333333333
1991-07-01	65.7524613220816
1991-10-01	68.4849551293331
1992-01-01	67.8288431061807
1992-04-01	64.3310977762090
1992-07-01	63.1662829821144
1992-10-01	66.7731629392971
1993-01-01	65.9971560611447
1993-04-01	63.4159386699946
1993-07-01	62.8602112045821
1993-10-01	66.4991925354387
1994-01-01	67.2717469446441
1994-04-01	64.2406773554315
1994-07-01	65.0587172538392
1994-10-01	67.5357595509687
1995-01-01	67.1138506163887
1995-04-01	65.4195423174718
1995-07-01	65.8656471873293
1995-10-01	70.0091157702826
1996-01-01	68.0109489051095
1996-04-01	65.9963436928702
1996-07-01	66.7522464698331
1996-10-01	67.1693948868862
1997-01-01	67.6253687315634
1997-04-01	65.7972623011469
1997-07-01	64.9953574744661
1997-10-01	68.4671260942447
1998-01-01	67.5074738415546
1998-04-01	64.5845057212530
1998-07-01	63.4959502731211
1998-10-01	64.2047601057801
1999-01-01	64.1788217465429
1999-04-01	60.8365019011407
1999-07-01	61.8212992951038
1999-10-01	64.9323422908329
2000-01-01	64.5757864632984
2000-04-01	60.5840809314755
2000-07-01	60.3435114503817
2000-10-01	65.2066273090840
2001-01-01	63.3098992969789
2001-04-01	62.1780303030303
2001-07-01	61.2690642063642
2001-10-01	65.1036801793387
2002-01-01	66.0188784008884
2002-04-01	62.8346167950128
2002-07-01	61.6027621297474
2002-10-01	64.1044104410441
2003-01-01	63.7771448914204
2003-04-01	60.4229074889868
2003-07-01	61.3095238095238
2003-10-01	64.1302455162807
2004-01-01	63.2681322485719
2004-04-01	60.1068412889884
2004-07-01	59.8935073857781
2004-10-01	65.4635648306534
2005-01-01	63.0045988758304
2005-04-01	60.7876421660160
2005-07-01	61.2483085250338
2005-10-01	64.3542683953528
2006-01-01	66.4711796246649
2006-04-01	62.7794461127794
2006-07-01	62.3376623376623
2006-10-01	66.0515378221114
2007-01-01	66.1796446953346
2007-04-01	62.5789298770356
2007-07-01	62.9635789123566
2007-10-01	65.7689110556941
2008-01-01	62.8595178719867
2008-04-01	61.8121363258520
2008-07-01	60.9403555407875
2008-10-01	65.1178227680053
2009-01-01	62.2472654955254
2009-04-01	60.2612865883909
2009-07-01	58.6246701846966
2009-10-01	61.6888450796780
2010-01-01	60.1244066131936
2010-04-01	58.0666231221424
2010-07-01	57.5989574849324
2010-10-01	60.5391360831439
2011-01-01	60.5800388852884
2011-04-01	57.4943347361606
2011-07-01	56.6461836998706
2011-10-01	59.4673123486683
2012-01-01	60.3904485317844
2012-04-01	58.0697224015494
2012-07-01	57.4217489512746
2012-10-01	57.6284839697116
2013-01-01	58.0987614605115
2013-04-01	56.0944274931749
2013-07-01	56.3720781300032
2013-10-01	61.1190817790531
2014-01-01	60.7930214115781
2014-04-01	57.9545454545454
2014-07-01	57.3333333333333
2014-10-01	64.2156099080854
2015-01-01	63.7463172584897
2015-04-01	60.4185903354878
2015-07-01	59.4171779141104
2015-10-01	62.3837829599146
2016-01-01	63.7672374602212
2016-04-01	60.4207362885049
2016-07-01	60.4497751124438
2016-10-01	65.6100478468900
2017-01-01	65.2355396541443
2017-04-01	60.4290822407628
2017-07-01	61.9118522930316
2017-10-01	66.1259115939872
2018-01-01	65.8837520440018
2018-04-01	62.7789348408212
2018-07-01	62.0828367103695