Quarter	Percent
1986-01-01	70.2858978477353
1986-04-01	66.6882276843467
1986-07-01	66.4497233973316
1986-10-01	69.6446038474079
1987-01-01	69.4544266579549
1987-04-01	68.1773399014778
1987-07-01	65.1930056087100
1987-10-01	67.8134303671849
1988-01-01	67.4634794156706
1988-04-01	64.2713903743316
1988-07-01	62.6092804303968
1988-10-01	64.4736842105263
1989-01-01	62.8600474415452
1989-04-01	60.6277720914364
1989-07-01	59.4854202401372
1989-10-01	64.1580756013746
1990-01-01	64.9587345254470
1990-04-01	64.8844429113487
1990-07-01	63.2525951557093
1990-10-01	65.0277008310249
1991-01-01	64.9584487534626
1991-04-01	62.6777662157475
1991-07-01	62.3869171885873
1991-10-01	63.8801811215604
1992-01-01	63.1193300767620
1992-04-01	60.3152364273205
1992-07-01	59.5497713682730
1992-10-01	63.0112834978843
1993-01-01	61.5194346289753
1993-04-01	58.8151826888968
1993-07-01	59.7434983968650
1993-10-01	62.4776865405212
1994-01-01	63.6721546170365
1994-04-01	60.4450825556353
1994-07-01	60.8288288288288
1994-10-01	63.1864161849711
1995-01-01	62.3371924746744
1995-04-01	61.4519056261343
1995-07-01	62.2222222222222
1995-10-01	65.9240321402484
1996-01-01	64.4842721287491
1996-04-01	63.0091743119266
1996-07-01	63.5359116022099
1996-10-01	62.4168514412417
1997-01-01	64.7887323943662
1997-04-01	63.0580357142857
1997-07-01	62.2479462285288
1997-10-01	64.8689138576779
1998-01-01	63.6875704093128
1998-04-01	62.0897774424745
1998-07-01	61.2268080272624
1998-10-01	61.0246679316888
1999-01-01	60.6164383561644
1999-04-01	57.3883161512028
1999-07-01	57.9571537872992
1999-10-01	60.8878683505549
2000-01-01	60.6431852986218
2000-04-01	58.7423312883436
2000-07-01	57.2305331799003
2000-10-01	61.4619211634137
2001-01-01	59.1758870660053
2001-04-01	60.4491815759421
2001-07-01	57.5918212798182
2001-10-01	61.7061255167230
2002-01-01	62.0253164556962
2002-04-01	61.2629246676514
2002-07-01	58.6232149395826
2002-10-01	60.1233671988389
2003-01-01	60.6386795837818
2003-04-01	57.4626865671642
2003-07-01	58.7861679604799
2003-10-01	61.1228070175439
2004-01-01	60.1674223927450
2004-04-01	55.7986111111111
2004-07-01	56.1937716262976
2004-10-01	62.4311294765840
2005-01-01	58.6218717860816
2005-04-01	57.0501877773984
2005-07-01	58.8575314518871
2005-10-01	62.1109607577808
2006-01-01	63.6149444631437
2006-04-01	59.6044250754274
2006-07-01	59.9465061852223
2006-10-01	62.8170894526035
2007-01-01	63.6908727514990
2007-04-01	60.7000000000000
2007-07-01	59.6198732910970
2007-10-01	62.9913391072618
2008-01-01	59.7268487674883
2008-04-01	58.9273817455030
2008-07-01	58.0559254327563
2008-10-01	62.7535749916861
2009-01-01	59.2162072401196
2009-04-01	57.3275862068966
2009-07-01	57.1948395633477
2009-10-01	58.6025049439684
2010-01-01	58.5277686493592
2010-04-01	55.9055118110236
2010-07-01	56.2540929927963
2010-10-01	58.4122835674616
2011-01-01	57.6835236541599
2011-04-01	55.3670473083197
2011-07-01	54.6314416177430
2011-10-01	56.5613806577662
2012-01-01	57.6685118853794
2012-04-01	56.5514993481095
2012-07-01	55.0521512385919
2012-10-01	55.6677524429967
2013-01-01	56.7057291666667
2013-04-01	54.9772283669486
2013-07-01	54.3683013965573
2013-10-01	58.3684040142441
2014-01-01	58.2633957391866
2014-04-01	55.7952350289762
2014-07-01	54.8925248636510
2014-10-01	62.2924648786718
2015-01-01	60.8598726114650
2015-04-01	58.8142041851617
2015-07-01	57.4320050600886
2015-10-01	59.5470273670966
2016-01-01	61.3216410898841
2016-04-01	57.9177057356608
2016-07-01	57.2495332918482
2016-10-01	63.5461872287663
2017-01-01	62.0753551575046
2017-04-01	57.5879086983344
2017-07-01	60.4006163328197
2017-10-01	65.1076923076923
2018-01-01	64.9047326367548
2018-04-01	61.1316113161132
2018-07-01	62.2153846153846