Quarter	Percent
1978-04-01	2.86832537518834
1978-07-01	2.70284114121342
1978-10-01	2.04629417837422
1979-01-01	2.48766015203237
1979-04-01	2.50697409722862
1979-07-01	2.35604627581898
1979-10-01	2.65211035714529
1980-01-01	2.55514011521150
1980-04-01	2.35820935093102
1980-07-01	2.86832841207000
1980-10-01	2.90058931387321
1981-01-01	1.84830656267606
1981-04-01	2.20928733210629
1981-07-01	2.41331612451666
1981-10-01	2.15372520032179
1982-01-01	2.88423689373298
1982-04-01	2.63722755174089
1982-07-01	3.08321925633169
1982-10-01	2.77557503094339
1983-01-01	3.59325606850133
1983-04-01	3.15714979268713
1983-07-01	3.58065433031406
1983-10-01	2.65918285619245
1984-01-01	3.47872877540487
1984-04-01	3.57982052161849
1984-07-01	3.14484897471334
1984-10-01	2.97785567572776
1985-01-01	3.42831635470491
1985-04-01	3.96087482174872
1985-07-01	3.14621125352397
1985-10-01	3.44626557541344
1986-01-01	3.31885416109390
1986-04-01	4.08909369613455
1986-07-01	3.54778655355415
1986-10-01	3.23796888601450
1987-01-01	3.10714694604482
1987-04-01	3.23505528611610
1987-07-01	3.00384648120606
1987-10-01	3.52200606704988
1988-01-01	3.74140766142688
1988-04-01	3.60457110294700
1988-07-01	2.84768893228185
1988-10-01	3.03034534272208
1989-01-01	3.89274956349578
1989-04-01	2.97013730810012
1989-07-01	2.52285541792887
1989-10-01	3.21566931229583
1990-01-01	2.55762888108515
1990-04-01	2.75670356748307
1990-07-01	3.02169044494263
1990-10-01	3.22608766576079
1991-01-01	3.43714982188611
1991-04-01	3.81775560678687
1991-07-01	4.36452902189990
1991-10-01	3.78642372865088
1992-01-01	3.84132877427365
1992-04-01	4.17570484016648
1992-07-01	3.69073824747515
1992-10-01	3.73043015314746
1993-01-01	4.30998248091136
1993-04-01	4.30462854031503
1993-07-01	4.82819860827423
1993-10-01	5.59957466592319
1994-01-01	6.64413785293420
1994-04-01	5.55196109141496
1994-07-01	5.13491436896503
1994-10-01	5.04536106688702
1995-01-01	4.11044947130113
1995-04-01	3.39895652772399
1995-07-01	4.40181806206928
1995-10-01	4.47155269096198
1996-01-01	5.28581378677072
1996-04-01	5.26699273788043
1996-07-01	4.32060937897878
1996-10-01	3.99937878595133
1997-01-01	5.03486097206051
1997-04-01	4.21399301342933
1997-07-01	4.17712669892532
1997-10-01	4.27814644144765
1998-01-01	5.06946661413472
1998-04-01	4.53798293634128
1998-07-01	4.55909490085526
1998-10-01	3.71074816598868
1999-01-01	3.93827006649422
1999-04-01	3.01960544452396
1999-07-01	3.73553258409542
1999-10-01	3.31691495674961
2000-01-01	4.11874489397649
2000-04-01	3.35841077842867
2000-07-01	2.19290727946957
2000-10-01	3.00638778068556
2001-01-01	2.98569588418737
2001-04-01	2.91474483679572
2001-07-01	3.08593669144287
2001-10-01	2.87836755906385
2002-01-01	3.23889459053746
2002-04-01	2.88374024087769
2002-07-01	2.51147201601699
2002-10-01	3.16794913217087
2003-01-01	3.06285597162126
2003-04-01	2.97461490803066
2003-07-01	3.00388670051995
2003-10-01	3.03147153867724
2004-01-01	2.91783653581674
2004-04-01	3.22040418893544
2004-07-01	3.29933105619666
2004-10-01	2.71185033157239
2005-01-01	3.74660361728082
2005-04-01	2.88004857753274
2005-07-01	2.47051093784451
2005-10-01	2.48949824137064
2006-01-01	3.14147914599099
2006-04-01	2.51351587677764
2006-07-01	2.88879281924129
2006-10-01	2.55135561109888
2007-01-01	3.25221079287371
2007-04-01	2.64723523184230
2007-07-01	2.38137796577272
2007-10-01	2.24398908503353
2008-01-01	2.22892488689479
2008-04-01	1.94482269004370
2008-07-01	1.82300451306843
2008-10-01	2.04086242243556
2009-01-01	3.08337286453213
2009-04-01	2.82327695561253
2009-07-01	2.56044296435473
2009-10-01	3.01805935385428
2010-01-01	2.96904329089382
2010-04-01	2.29321916042132
2010-07-01	2.79231944310183
2010-10-01	2.46410489816170
2011-01-01	2.81059566549331
2011-04-01	2.85623244575596
2011-07-01	2.89128690981010
2011-10-01	2.99216112659743
2012-01-01	3.14717018101574
2012-04-01	3.08739020472926
2012-07-01	3.28843609957673
2012-10-01	2.92411950198714
2013-01-01	3.25326470329676
2013-04-01	2.99605439685077
2013-07-01	3.43588669870897
2013-10-01	3.03918108237990
2014-01-01	4.85648464071877
2014-04-01	3.83302599953518
2014-07-01	3.25775739806130
2014-10-01	3.28603423917900
2015-01-01	3.54854301171392
2015-04-01	3.37877572811772
2015-07-01	3.75168625582022
2015-10-01	3.50780963780565
2016-01-01	3.92749884165531
2016-04-01	3.58352625465554
2016-07-01	3.65030540699878
2016-10-01	3.24051485805426
2017-01-01	3.98418618599113
2017-04-01	3.40207031832360
2017-07-01	3.78537266237096
2017-10-01	3.72332676670854
2018-01-01	4.19536338351995
2018-04-01	3.93338132501570
2018-07-01	3.80032187823164