Quarter	Percent
1978-01-01	2.66500649582742
1978-04-01	2.29814062345158
1978-07-01	2.26122571100888
1978-10-01	2.30381587938677
1979-01-01	2.45213086241977
1979-04-01	2.05827104116353
1979-07-01	2.08795154382064
1979-10-01	2.04793600284136
1980-01-01	2.17532311379953
1980-04-01	1.86277706100698
1980-07-01	1.96734921118947
1980-10-01	2.16018830559548
1981-01-01	2.45610872157487
1981-04-01	2.29788767050088
1981-07-01	2.12277250120324
1981-10-01	2.20612132861274
1982-01-01	2.54646359066575
1982-04-01	2.35891982538833
1982-07-01	2.29173774871334
1982-10-01	2.41584325798844
1983-01-01	2.94833721622588
1983-04-01	2.66115255465336
1983-07-01	2.56458933336150
1983-10-01	2.55775365796739
1984-01-01	2.90962603129804
1984-04-01	2.67055700775098
1984-07-01	2.64493888246744
1984-10-01	2.55145628211578
1985-01-01	2.80900755947569
1985-04-01	2.49377682505065
1985-07-01	2.45054774042527
1985-10-01	2.68962000634346
1986-01-01	2.86877634826513
1986-04-01	2.69912816970099
1986-07-01	2.72561411015547
1986-10-01	2.72427986016326
1987-01-01	3.11978690263455
1987-04-01	3.01537152157450
1987-07-01	2.75078898738765
1987-10-01	2.64569449070193
1988-01-01	2.88672516327021
1988-04-01	2.42919589051390
1988-07-01	2.40100988260945
1988-10-01	2.22775921095695
1989-01-01	2.39333381567314
1989-04-01	2.32300855913926
1989-07-01	2.15820131336848
1989-10-01	2.06290374536684
1990-01-01	2.24242930349305
1990-04-01	1.98367306946350
1990-07-01	1.98076253630068
1990-10-01	1.99387929764334
1991-01-01	2.23636654037223
1991-04-01	1.96954169327691
1991-07-01	2.01621876658137
1991-10-01	1.89928527339458
1992-01-01	2.12410908080256
1992-04-01	2.07298427662509
1992-07-01	2.11011261501189
1992-10-01	2.14865203734487
1993-01-01	2.32422189223142
1993-04-01	2.34028483515520
1993-07-01	2.43017255521786
1993-10-01	2.61673167433851
1994-01-01	2.87103186933621
1994-04-01	2.79640742430784
1994-07-01	2.94168758998050
1994-10-01	2.84011862303215
1995-01-01	3.10777839649951
1995-04-01	3.03133237309787
1995-07-01	3.11133880798042
1995-10-01	3.29030372662945
1996-01-01	3.46826783891940
1996-04-01	3.49381211627614
1996-07-01	3.31939106082927
1996-10-01	3.26016754090889
1997-01-01	3.41072177586814
1997-04-01	3.32050763660560
1997-07-01	3.42376771522438
1997-10-01	3.42415523002887
1998-01-01	3.91962587797373
1998-04-01	4.30146746413798
1998-07-01	4.29505816883716
1998-10-01	4.34349665620036
1999-01-01	4.87255642723222
1999-04-01	5.16809043031938
1999-07-01	4.79348357191814
1999-10-01	4.64576548775713
2000-01-01	5.18440572523952
2000-04-01	4.99567840075162
2000-07-01	4.80668522568738
2000-10-01	4.81253249742002
2001-01-01	5.04909621341395
2001-04-01	5.33317011738193
2001-07-01	5.21102464246363
2001-10-01	5.56584985983440
2002-01-01	5.58353475925315
2002-04-01	5.73550337778106
2002-07-01	5.59628022372758
2002-10-01	5.54245433707945
2003-01-01	5.77769862513079
2003-04-01	5.86853135482654
2003-07-01	5.34493285438666
2003-10-01	5.20278887561431
2004-01-01	5.30270552644340
2004-04-01	5.02895190083159
2004-07-01	4.97839291709232
2004-10-01	4.69466050703114
2005-01-01	4.94721631996701
2005-04-01	4.68072881688535
2005-07-01	4.40471504148684
2005-10-01	4.49385031736683
2006-01-01	4.69958195050856
2006-04-01	4.31975758215198
2006-07-01	4.26485113032276
2006-10-01	4.22015579779494
2007-01-01	4.28032486520601
2007-04-01	3.96006595234396
2007-07-01	3.82206272579019
2007-10-01	3.90819109782499
2008-01-01	4.14581422646488
2008-04-01	4.16465026764261
2008-07-01	4.11596133832126
2008-10-01	4.16527948638984
2009-01-01	4.75310398922252
2009-04-01	5.53487529624500
2009-07-01	5.77960920375132
2009-10-01	5.34249634923899
2010-01-01	5.56050968108222
2010-04-01	5.66270005901970
2010-07-01	5.49284374431538
2010-10-01	5.30217931237958
2011-01-01	5.19644805297539
2011-04-01	5.00957006892541
2011-07-01	4.75192611889119
2011-10-01	4.74390084644959
2012-01-01	4.88090173942133
2012-04-01	4.80584815603315
2012-07-01	4.56630435220439
2012-10-01	4.32674121197351
2013-01-01	4.71196125875197
2013-04-01	4.41209037572884
2013-07-01	4.36616576807050
2013-10-01	3.99514096448218
2014-01-01	3.92336516496654
2014-04-01	3.84431472230937
2014-07-01	3.79578745903777
2014-10-01	3.65674791036209
2015-01-01	3.78692389234656
2015-04-01	3.58763213969032
2015-07-01	3.61698448051640
2015-10-01	3.46974508245179
2016-01-01	3.59097697988093
2016-04-01	3.37051950174017
2016-07-01	3.40957606827536
2016-10-01	3.23511662147258
2017-01-01	3.13598985382968
2017-04-01	3.04004823189918
2017-07-01	3.07161793471676
2017-10-01	2.83790025810544
2018-01-01	2.66990448624203
2018-04-01	2.63153473769012
2018-07-01	2.65535082940944