Quarter	Percent
1986-01-01	4.42461980601126
1986-04-01	4.18905052212229
1986-07-01	4.13152945458958
1986-10-01	4.18646616541353
1987-01-01	4.33690255428606
1987-04-01	4.25531914893617
1987-07-01	4.11966946136679
1987-10-01	4.33381088825215
1988-01-01	5.24349083895853
1988-04-01	5.53595327898771
1988-07-01	6.33456334563346
1988-10-01	6.22032866707243
1989-01-01	7.45820831547364
1989-04-01	7.51272817583509
1989-07-01	7.28666708221654
1989-10-01	7.17879494416493
1990-01-01	7.57992542331438
1990-04-01	7.69230769230769
1990-07-01	8.05019895928987
1990-10-01	8.88661899897855
1991-01-01	10.33904396789270
1991-04-01	10.43860176884660
1991-07-01	11.10106126386880
1991-10-01	11.02013984342320
1992-01-01	11.57162395195340
1992-04-01	10.43238711222900
1992-07-01	10.51805337519620
1992-10-01	10.63540001184340
1993-01-01	10.59967969630460
1993-04-01	10.12289972095230
1993-07-01	9.40826642878382
1993-10-01	9.47110904007456
1994-01-01	9.82411478824346
1994-04-01	8.50952602230483
1994-07-01	7.86666666666667
1994-10-01	7.62509928514694
1995-01-01	7.20194922937443
1995-04-01	6.38382236320381
1995-07-01	6.11968894398738
1995-10-01	6.41669887901044
1996-01-01	6.74324027258738
1996-04-01	6.18788777247021
1996-07-01	6.37417669152469
1996-10-01	6.19944628413224
1997-01-01	7.08767759710442
1997-04-01	6.81584222788102
1997-07-01	6.91296586790718
1997-10-01	6.89655172413793
1998-01-01	7.84450029410192
1998-04-01	7.94190692149876
1998-07-01	7.61564294225978
1998-10-01	7.85006693440428
1999-01-01	7.95048289845793
1999-04-01	7.35730070608527
1999-07-01	6.88596963497362
1999-10-01	6.31417381179210
2000-01-01	6.89289501590668
2000-04-01	6.36490699924739
2000-07-01	5.91306200724483
2000-10-01	5.70143320431008
2001-01-01	5.87247441616374
2001-04-01	5.46940928270042
2001-07-01	5.33291259072263
2001-10-01	5.46274469611561
2002-01-01	5.75535913847404
2002-04-01	5.30062480794838
2002-07-01	5.45046652730332
2002-10-01	4.95606326889279
2003-01-01	5.45591182364730
2003-04-01	4.82188743890764
2003-07-01	4.43104221701640
2003-10-01	4.63131040573027
2004-01-01	4.74908200734394
2004-04-01	4.13361580529142
2004-07-01	3.81440781440781
2004-10-01	3.67007368671262
2005-01-01	4.35383222979088
2005-04-01	3.77657277220596
2005-07-01	3.71791228568722
2005-10-01	3.65188190849306
2006-01-01	4.53051969086955
2006-04-01	3.63060882517222
2006-07-01	3.78660697631040
2006-10-01	3.70164979897406
2007-01-01	4.32615356473224
2007-04-01	3.56928752593959
2007-07-01	3.51526364477336
2007-10-01	3.31391114348143
2008-01-01	4.37309714918350
2008-04-01	3.77548682703322
2008-07-01	4.24986261220004
2008-10-01	4.39110070257611
2009-01-01	5.52546538619089
2009-04-01	5.72313861295908
2009-07-01	6.15991921417424
2009-10-01	7.07230165531550
2010-01-01	6.47716471280496
2010-04-01	6.55998545256171
2010-07-01	6.09245609245609
2010-10-01	6.22382346318397
2011-01-01	6.52456226769961
2011-04-01	6.02513107937082
2011-07-01	6.02780671165255
2011-10-01	6.57841778095792
2012-01-01	6.89824092629704
2012-04-01	6.40505187189896
2012-07-01	6.84398606776134
2012-10-01	6.47138964577657
2013-01-01	6.27190223739779
2013-04-01	6.03343396566485
2013-07-01	5.91472417341506
2013-10-01	5.75615320493134
2014-01-01	6.04056053616503
2014-04-01	5.28858824562945
2014-07-01	5.39384682522365
2014-10-01	5.64553840921651
2015-01-01	5.97375105842506
2015-04-01	5.58804695837780
2015-07-01	5.70580900374081
2015-10-01	5.11022890446828
2016-01-01	5.75042649690010
2016-04-01	5.13232747959436
2016-07-01	5.11107467825232
2016-10-01	5.40842820051927
2017-01-01	5.44697720515362
2017-04-01	4.85082118620247
2017-07-01	4.79506250989081
2017-10-01	4.64410735122520
2018-01-01	4.81703775411423
2018-04-01	4.55446314071426
2018-07-01	3.97844042033425