Quarter	Percent
1986-01-01	64.0539672341792
1986-04-01	61.2548512289780
1986-07-01	61.3407094044907
1986-10-01	64.1017280730356
1987-01-01	63.5739954263313
1987-04-01	62.7586206896552
1987-07-01	61.0689541405477
1987-10-01	62.3221964935494
1988-01-01	61.2881806108898
1988-04-01	57.4866310160428
1988-07-01	56.0524546065904
1988-10-01	57.9959514170040
1989-01-01	54.3205692985429
1989-04-01	53.0194472876152
1989-07-01	51.9382504288165
1989-10-01	55.7044673539519
1990-01-01	56.2242090784044
1990-04-01	56.7781993790962
1990-07-01	54.9826989619377
1990-10-01	55.3324099722992
1991-01-01	53.5664819944598
1991-04-01	52.2719389524801
1991-07-01	51.1830201809325
1991-10-01	53.2218739115291
1992-01-01	50.7676203768318
1992-04-01	51.1733800350263
1992-07-01	50.0879352796342
1992-10-01	52.3977433004231
1993-01-01	50.7420494699647
1993-04-01	49.0599503369989
1993-07-01	50.8371927324546
1993-10-01	52.3027490182078
1994-01-01	52.5769506084467
1994-04-01	50.8614501076813
1994-07-01	52.8648648648649
1994-10-01	55.2023121387283
1995-01-01	53.8712011577424
1995-04-01	54.6279491833031
1995-07-01	55.2641165755920
1995-10-01	57.4506939371804
1996-01-01	56.4008778346745
1996-04-01	56.0733944954128
1996-07-01	56.1694290976059
1996-10-01	55.6171470805617
1997-01-01	55.6708673091179
1997-04-01	55.5059523809524
1997-07-01	53.3607169529500
1997-10-01	56.3295880149813
1998-01-01	53.6612842658656
1998-04-01	53.7155790267823
1998-07-01	53.4645967436577
1998-10-01	52.7893738140417
1999-01-01	52.1308980213090
1999-04-01	49.7518136693395
1999-07-01	50.8033664881408
1999-10-01	53.3869115958668
2000-01-01	52.0673813169985
2000-04-01	51.1119631901840
2000-07-01	51.2466436517069
2000-10-01	54.1523153463452
2001-01-01	51.2399847386494
2001-04-01	53.9779215835554
2001-07-01	50.7383566830746
2001-10-01	54.6411123637730
2002-01-01	54.1325390915860
2002-04-01	54.4682422451994
2002-07-01	51.9589893811790
2002-10-01	53.2293178519594
2003-01-01	52.8525296017223
2003-04-01	51.6702203269367
2003-07-01	53.5285815102329
2003-10-01	54.6666666666667
2004-01-01	53.5054063480991
2004-04-01	48.9930555555556
2004-07-01	50.8304498269896
2004-10-01	56.6804407713499
2005-01-01	52.0054850874186
2005-04-01	51.3827244793445
2005-07-01	53.0431825909555
2005-10-01	56.0554803788904
2006-01-01	56.0417367889599
2006-04-01	53.5367080120684
2006-07-01	54.0287529254430
2006-10-01	56.6421895861148
2007-01-01	56.2291805463025
2007-04-01	54.3000000000000
2007-07-01	53.8512837612538
2007-10-01	58.1945369753498
2008-01-01	53.2978014656895
2008-04-01	53.0646235842772
2008-07-01	52.6964047936085
2008-10-01	55.2045227801796
2009-01-01	50.6808369312521
2009-04-01	47.0490716180371
2009-07-01	48.3956334766788
2009-10-01	48.4179301252472
2010-01-01	48.5704896483733
2010-04-01	46.3910761154856
2010-07-01	46.8893254747872
2010-10-01	48.8729173472721
2011-01-01	48.1566068515498
2011-04-01	47.0799347471452
2011-07-01	47.0319634703196
2011-10-01	48.4532725496581
2012-01-01	48.0950830348421
2012-04-01	47.5880052151239
2012-07-01	46.6427640156454
2012-10-01	45.2117263843648
2013-01-01	47.7864583333333
2013-04-01	46.5191932335719
2013-07-01	46.0539136083144
2013-10-01	49.4334736160570
2014-01-01	49.1930277598451
2014-04-01	47.7462974887315
2014-07-01	47.1286493423163
2014-10-01	53.4802043422733
2015-01-01	52.0382165605096
2015-04-01	50.5072923272036
2015-07-01	49.3358633776091
2015-10-01	52.4693299779805
2016-01-01	52.4585029752584
2016-04-01	50.3740648379052
2016-07-01	50.3422526446795
2016-10-01	54.6807191568506
2017-01-01	53.2118591723286
2017-04-01	50.8019740900679
2017-07-01	52.3882896764253
2017-10-01	56.8307692307692
2018-01-01	57.0067609096497
2018-04-01	54.4895448954490
2018-07-01	57.2000000000000