Quarter	Percent
1986-01-01	44.1356995129762
1986-04-01	43.9714479123568
1986-07-01	44.0322125927315
1986-10-01	45.3376571856463
1987-01-01	45.3380388932747
1987-04-01	44.9391277671970
1987-07-01	44.3003216460136
1987-10-01	46.0283972672548
1988-01-01	46.2488010676507
1988-04-01	46.2320760110377
1988-07-01	46.5487233063725
1988-10-01	48.3159913457300
1989-01-01	48.5062412427965
1989-04-01	47.9281942176297
1989-07-01	48.0717561508208
1989-10-01	49.3307868973490
1990-01-01	49.3651451780178
1990-04-01	48.1402724638189
1990-07-01	47.7788232424215
1990-10-01	49.0554809421452
1991-01-01	49.0820713950465
1991-04-01	47.4888277186422
1991-07-01	47.7933143046513
1991-10-01	49.2724585527485
1992-01-01	49.7414709782374
1992-04-01	48.9480492235162
1992-07-01	49.0893655780608
1992-10-01	50.9467190468779
1993-01-01	51.4851999883546
1993-04-01	50.6642792084127
1993-07-01	51.6549788465224
1993-10-01	52.4103924452897
1994-01-01	52.2462655853791
1994-04-01	50.5305304084006
1994-07-01	49.9712497646328
1994-10-01	51.6399449605097
1995-01-01	51.6056144056100
1995-04-01	50.1594834953824
1995-07-01	50.2385653830383
1995-10-01	51.2712254873304
1996-01-01	51.2815074445910
1996-04-01	50.4980562938169
1996-07-01	49.7743432974336
1996-10-01	51.5970338921159
1997-01-01	50.9246689576530
1997-04-01	50.1609126591384
1997-07-01	50.9446390005904
1997-10-01	51.5224933707832
1998-01-01	51.3419539490180
1998-04-01	50.7604377010169
1998-07-01	50.6800612550492
1998-10-01	51.3102414019954
1999-01-01	50.0610024186269
1999-04-01	48.2031276105189
1999-07-01	48.2282588420845
1999-10-01	50.3843057684461
2000-01-01	50.0012804448631
2000-04-01	48.9103047652499
2000-07-01	48.0688547580809
2000-10-01	49.5244662454303
2001-01-01	48.3777942514164
2001-04-01	48.0028349042240
2001-07-01	48.1291149731010
2001-10-01	49.6904935544446
2002-01-01	48.7448582020000
2002-04-01	47.8417172094126
2002-07-01	47.6405864049017
2002-10-01	49.4838440825194
2003-01-01	49.5619831169388
2003-04-01	49.0219980073156
2003-07-01	48.2983532944301
2003-10-01	50.1288177728838
2004-01-01	49.6745223288522
2004-04-01	48.6936963252906
2004-07-01	48.6026328879308
2004-10-01	51.1388424847142
2005-01-01	50.7091795836605
2005-04-01	50.0597621784357
2005-07-01	49.9263392566132
2005-10-01	50.9748701581503
2006-01-01	50.9218632040473
2006-04-01	49.9001575695085
2006-07-01	49.8812434514866
2006-10-01	51.2612616574521
2007-01-01	51.4251100358788
2007-04-01	50.7223001213493
2007-07-01	50.3028809234164
2007-10-01	51.6300933513619
2008-01-01	51.9672524776447
2008-04-01	51.3243220591704
2008-07-01	51.2767774579826
2008-10-01	52.1176903951210
2009-01-01	50.8803078551767
2009-04-01	49.9570390470736
2009-07-01	49.9314487146185
2009-10-01	51.0483487382535
2010-01-01	52.4741095652740
2010-04-01	53.0527623212946
2010-07-01	54.2184687969377
2010-10-01	55.0734829353632
2011-01-01	55.3033129105326
2011-04-01	55.6184452091958
2011-07-01	55.4507893255931
2011-10-01	55.7973772610391
2012-01-01	55.9407075588163
2012-04-01	55.5135682165177
2012-07-01	55.4793269892349
2012-10-01	55.9312670457682
2013-01-01	55.9338559614097
2013-04-01	55.8878805170951
2013-07-01	55.7140407523747
2013-10-01	56.5342821555739
2014-01-01	56.2479120620283
2014-04-01	55.7373436130714
2014-07-01	55.4974891667173
2014-10-01	56.4243136958905
2015-01-01	55.9223400395863
2015-04-01	55.6927788623924
2015-07-01	55.8494525736849
2015-10-01	56.3607072696315
2016-01-01	55.7157512056370
2016-04-01	55.3483359485129
2016-07-01	55.4147644194269
2016-10-01	55.9321882782951
2017-01-01	55.5346228813958
2017-04-01	55.3987052011002
2017-07-01	55.7023009085971
2017-10-01	56.2397691665142
2018-01-01	55.8097627324386
2018-04-01	55.5848833235750
2018-07-01	55.0148397888996