Quarter	Percent
1986-01-01	29.0238882797837
1986-04-01	28.2670155736739
1986-07-01	28.1913498741725
1986-10-01	29.2685829911325
1987-01-01	29.0442859648364
1987-04-01	29.3308340378657
1987-07-01	28.4462868445565
1987-10-01	29.4180749119145
1988-01-01	29.7388554660807
1988-04-01	29.7628703553500
1988-07-01	29.9942286898241
1988-10-01	31.0783455159151
1989-01-01	30.3245809175148
1989-04-01	30.1786029445409
1989-07-01	30.0877280473896
1989-10-01	31.4124930142434
1990-01-01	31.0800509350621
1990-04-01	30.5705859725606
1990-07-01	30.1544429462831
1990-10-01	31.6678522131613
1991-01-01	31.3008421354329
1991-04-01	29.4098518860404
1991-07-01	30.8399152942356
1991-10-01	31.4858470954115
1992-01-01	31.8271461356831
1992-04-01	30.6145067259955
1992-07-01	31.5489959641697
1992-10-01	33.6078458592433
1993-01-01	34.0101048284496
1993-04-01	32.5156651175213
1993-07-01	34.7156448224253
1993-10-01	35.1769698525519
1994-01-01	34.9682703866260
1994-04-01	33.6090279379369
1994-07-01	33.2437167773675
1994-10-01	35.4272060186189
1995-01-01	34.6871220569526
1995-04-01	33.2294438654703
1995-07-01	33.4037495156859
1995-10-01	34.5111951148590
1996-01-01	34.5315923062818
1996-04-01	33.5104675767459
1996-07-01	33.0886898143452
1996-10-01	34.5090259037339
1997-01-01	33.8218575688043
1997-04-01	33.7979159933242
1997-07-01	35.6470570518564
1997-10-01	35.0839465666745
1998-01-01	34.5014392867410
1998-04-01	34.5465623217911
1998-07-01	35.0600717163876
1998-10-01	36.3158030249529
1999-01-01	35.2775927322240
1999-04-01	34.7723796343506
1999-07-01	35.6233861542225
1999-10-01	36.9786144469689
2000-01-01	35.9420409526049
2000-04-01	35.1594241221221
2000-07-01	35.3812380571479
2000-10-01	35.7906870666275
2001-01-01	34.5626473382358
2001-04-01	34.3883378208517
2001-07-01	34.9957332683165
2001-10-01	35.8581677226262
2002-01-01	35.2129764309300
2002-04-01	34.3200849561409
2002-07-01	34.5581463567711
2002-10-01	35.9374496320916
2003-01-01	36.7110835483398
2003-04-01	36.4463725309212
2003-07-01	35.7525170238543
2003-10-01	37.3018088061348
2004-01-01	37.5853517906322
2004-04-01	37.5430147354727
2004-07-01	37.6665451615065
2004-10-01	39.7729765032143
2005-01-01	39.4587924395257
2005-04-01	39.3995178892690
2005-07-01	38.8381253345213
2005-10-01	39.3285390834547
2006-01-01	39.1108720183479
2006-04-01	38.6902150934373
2006-07-01	37.6953823166907
2006-10-01	38.4745845442602
2007-01-01	39.1245487082506
2007-04-01	38.4001809143740
2007-07-01	38.6577464144755
2007-10-01	40.2618027400567
2008-01-01	40.7420313718666
2008-04-01	40.8234504753890
2008-07-01	40.3279631260641
2008-10-01	41.5876846513502
2009-01-01	41.1137964657762
2009-04-01	41.1383562869354
2009-07-01	40.9247301988979
2009-10-01	41.9677808530268
2010-01-01	44.3449223127164
2010-04-01	44.6559216923186
2010-07-01	45.7290520735660
2010-10-01	46.5974940750189
2011-01-01	46.6001061138584
2011-04-01	47.4791989743320
2011-07-01	47.4782947721242
2011-10-01	47.8260050378710
2012-01-01	47.7178872588657
2012-04-01	47.3128633403424
2012-07-01	47.6971554895932
2012-10-01	47.6657478966498
2013-01-01	47.6110314742631
2013-04-01	47.7486798560381
2013-07-01	47.2015840667590
2013-10-01	48.3024863744604
2014-01-01	48.4820795582470
2014-04-01	47.9936179150202
2014-07-01	48.4857053190606
2014-10-01	48.6902124261796
2015-01-01	47.7000847685006
2015-04-01	48.1923141160698
2015-07-01	48.3189853686551
2015-10-01	48.7109201771494
2016-01-01	47.6234829255620
2016-04-01	48.0262131598652
2016-07-01	48.0531140837496
2016-10-01	48.4226099376999
2017-01-01	47.7097513115027
2017-04-01	48.2646957307939
2017-07-01	48.8178946226244
2017-10-01	49.3378863783023
2018-01-01	49.2728367992948
2018-04-01	49.0864955687597
2018-07-01	48.5499771930692