Quarter	Percent
1978-04-01	3.32887308123902
1978-07-01	3.47998568081488
1978-10-01	3.27580618825871
1979-01-01	3.58124265458985
1979-04-01	3.32488590927914
1979-07-01	3.05661341662273
1979-10-01	2.86192928622581
1980-01-01	2.76242140072916
1980-04-01	2.75116763819482
1980-07-01	3.01203307784102
1980-10-01	2.96675127686371
1981-01-01	2.89129781270166
1981-04-01	3.15072588588945
1981-07-01	3.49824174767962
1981-10-01	3.07151160724475
1982-01-01	3.15116840152941
1982-04-01	3.03076614577395
1982-07-01	3.44791782287682
1982-10-01	4.57588978755256
1983-01-01	5.54870315125495
1983-04-01	6.29036965418650
1983-07-01	6.16840976583856
1983-10-01	5.65119929938193
1984-01-01	6.12694430025966
1984-04-01	5.54833491144872
1984-07-01	5.43988311131725
1984-10-01	5.23846773097530
1985-01-01	5.93984873429901
1985-04-01	6.56801593468961
1985-07-01	6.43202269812833
1985-10-01	5.72307536992685
1986-01-01	5.18860536610650
1986-04-01	5.13101779955297
1986-07-01	5.48454413926561
1986-10-01	5.99116032994985
1987-01-01	5.99627295399025
1987-04-01	5.84140607776492
1987-07-01	5.48862682814243
1987-10-01	6.02634541926307
1988-01-01	6.28993966919770
1988-04-01	6.28694539099621
1988-07-01	5.94066754151241
1988-10-01	5.03909863846822
1989-01-01	6.06021594815539
1989-04-01	5.18199289701867
1989-07-01	5.06418616770304
1989-10-01	4.87303293881781
1990-01-01	5.20054139546558
1990-04-01	5.52785412107948
1990-07-01	5.56887383721114
1990-10-01	5.53842124880232
1991-01-01	6.85780647936168
1991-04-01	7.65013519623139
1991-07-01	8.70410689545939
1991-10-01	8.58582319743875
1992-01-01	9.17792710377050
1992-04-01	9.05366432078526
1992-07-01	9.64884951916411
1992-10-01	10.14577388861910
1993-01-01	10.91418611286130
1993-04-01	10.78219264108780
1993-07-01	10.97653303610910
1993-10-01	11.36419819483580
1994-01-01	11.54146001985540
1994-04-01	9.48302418918731
1994-07-01	9.12220350688398
1994-10-01	8.58962263279356
1995-01-01	8.08434010908290
1995-04-01	7.34964877504209
1995-07-01	7.55342284467069
1995-10-01	7.53835247067096
1996-01-01	8.08990336995384
1996-04-01	7.45819419594044
1996-07-01	7.69378078855488
1996-10-01	7.10231073228606
1997-01-01	7.40254361758325
1997-04-01	6.58909445204022
1997-07-01	6.86157896727583
1997-10-01	6.25173212788323
1998-01-01	6.84374642296291
1998-04-01	6.27123645827940
1998-07-01	6.26455017113611
1998-10-01	5.81545664979857
1999-01-01	6.28142286476594
1999-04-01	5.29402483894491
1999-07-01	5.36073913795702
1999-10-01	5.05898423380778
2000-01-01	5.46108645638855
2000-04-01	4.60582267487903
2000-07-01	4.06812038670787
2000-10-01	4.05340645918249
2001-01-01	4.36044665590058
2001-04-01	4.67130006040929
2001-07-01	4.77304899123612
2001-10-01	4.49837153575076
2002-01-01	4.80308601211603
2002-04-01	4.26960196874328
2002-07-01	4.00151599285582
2002-10-01	4.13362529016530
2003-01-01	4.08230535734355
2003-04-01	3.71687811011677
2003-07-01	3.70900102034884
2003-10-01	3.60254810354343
2004-01-01	3.56484273670586
2004-04-01	3.66879632721275
2004-07-01	3.74333687398963
2004-10-01	3.23977807838351
2005-01-01	3.86027379986267
2005-04-01	3.34671241162982
2005-07-01	3.14445658626976
2005-10-01	3.16769744431108
2006-01-01	3.45943582213132
2006-04-01	3.25292869110689
2006-07-01	3.33585041915844
2006-10-01	2.87019897940531
2007-01-01	3.31491735136052
2007-04-01	2.76336049582429
2007-07-01	2.39824077659065
2007-10-01	2.48362539477643
2008-01-01	2.77783470042480
2008-04-01	2.65222007745177
2008-07-01	2.40852068163010
2008-10-01	2.60080950214981
2009-01-01	3.41154148603192
2009-04-01	3.27152257059235
2009-07-01	3.28173521950407
2009-10-01	3.40365094644851
2010-01-01	3.87479948802276
2010-04-01	3.18696895474856
2010-07-01	3.25411005594327
2010-10-01	2.70618114927756
2011-01-01	3.22235387293483
2011-04-01	3.28419622522212
2011-07-01	3.46287541282315
2011-10-01	3.34353878364109
2012-01-01	3.53565741180378
2012-04-01	3.20857356400135
2012-07-01	3.71371021422739
2012-10-01	3.35660310030689
2013-01-01	3.98038340222269
2013-04-01	3.57050388224718
2013-07-01	4.07377616927463
2013-10-01	3.68969646631576
2014-01-01	4.73287968319810
2014-04-01	4.00483397768780
2014-07-01	3.67068374329476
2014-10-01	3.95310252551291
2015-01-01	4.37199731480580
2015-04-01	4.08447509742278
2015-07-01	4.45823678183486
2015-10-01	4.10065781940018
2016-01-01	4.59544569907773
2016-04-01	4.23350788528055
2016-07-01	4.34885891852498
2016-10-01	3.83853216568127
2017-01-01	4.23306327207778
2017-04-01	3.95703126308331
2017-07-01	4.12478660246928
2017-10-01	3.97296013125047
2018-01-01	4.58877191729262
2018-04-01	4.45498126941916
2018-07-01	4.23813110124717