Quarter	Percent
1978-01-01	2.23428700524578
1978-04-01	2.06845612841554
1978-07-01	1.99082734661468
1978-10-01	1.78673846774912
1979-01-01	2.22570737346865
1979-04-01	2.03562009311025
1979-07-01	1.95654912477256
1979-10-01	1.82635818360261
1980-01-01	2.00334664088692
1980-04-01	2.04033152031316
1980-07-01	1.96582150596053
1980-10-01	1.91973379556595
1981-01-01	2.34863456966275
1981-04-01	2.28420945830612
1981-07-01	1.96537057635281
1981-10-01	1.95320445657222
1982-01-01	2.33280173436152
1982-04-01	2.39772063912545
1982-07-01	2.26390183881554
1982-10-01	2.23729092769332
1983-01-01	2.85567062831132
1983-04-01	2.70239090207351
1983-07-01	2.62163007517938
1983-10-01	2.40906272484560
1984-01-01	3.08023425112127
1984-04-01	2.86013495154424
1984-07-01	2.67249558213372
1984-10-01	2.55682328076723
1985-01-01	2.80775551437931
1985-04-01	2.71043378629438
1985-07-01	2.63009857623626
1985-10-01	2.57174615392379
1986-01-01	3.00464311632569
1986-04-01	2.89339040568337
1986-07-01	2.82312388247105
1986-10-01	2.58422363981809
1987-01-01	3.25738702660057
1987-04-01	3.07642205348409
1987-07-01	2.55074922008230
1987-10-01	2.47652820690474
1988-01-01	2.90857025621934
1988-04-01	2.61367660932251
1988-07-01	2.54294114136343
1988-10-01	2.39178007524556
1989-01-01	2.71081757316072
1989-04-01	2.37051851814251
1989-07-01	2.16965978976617
1989-10-01	2.12571182770440
1990-01-01	2.34061055035607
1990-04-01	2.33103251453322
1990-07-01	2.14931119332289
1990-10-01	2.03140071286478
1991-01-01	2.22613192413629
1991-04-01	2.29632614756486
1991-07-01	2.26566284619097
1991-10-01	2.16013683106236
1992-01-01	2.40627743785788
1992-04-01	2.15417163075915
1992-07-01	2.21774878728261
1992-10-01	2.27332092542851
1993-01-01	2.72491652470277
1993-04-01	2.57032272367485
1993-07-01	2.59599990641284
1993-10-01	2.74763103222597
1994-01-01	3.20808704759622
1994-04-01	2.89802974196660
1994-07-01	2.99161044698243
1994-10-01	2.83513458152204
1995-01-01	3.24549308411898
1995-04-01	3.26069943189685
1995-07-01	3.31729132263742
1995-10-01	3.18690683407784
1996-01-01	3.55460743551657
1996-04-01	3.49816741652731
1996-07-01	3.31759549592685
1996-10-01	3.19430899441051
1997-01-01	3.53950967006175
1997-04-01	3.66862804472612
1997-07-01	3.34886018331774
1997-10-01	3.34009948156784
1998-01-01	3.66481411796490
1998-04-01	4.17305635546086
1998-07-01	4.17778111945722
1998-10-01	4.10099697688900
1999-01-01	4.68233895028370
1999-04-01	4.61734708098500
1999-07-01	4.61633012520884
1999-10-01	4.15919895228816
2000-01-01	4.67442292627651
2000-04-01	4.80451276308852
2000-07-01	4.44542781187640
2000-10-01	4.21993943166221
2001-01-01	4.75928272537888
2001-04-01	4.85751540565359
2001-07-01	4.94348114884570
2001-10-01	4.67284952584656
2002-01-01	5.39077135709892
2002-04-01	5.41886132714186
2002-07-01	5.12099426906033
2002-10-01	4.73925326702324
2003-01-01	5.30784704213259
2003-04-01	5.29280542144296
2003-07-01	4.84785591899577
2003-10-01	4.57317331143992
2004-01-01	4.73600934664401
2004-04-01	4.64275318176902
2004-07-01	4.44476617968074
2004-10-01	4.05774253640262
2005-01-01	4.38291782022416
2005-04-01	4.31430877043046
2005-07-01	4.21782571413381
2005-10-01	4.19218293902954
2006-01-01	4.00414191905769
2006-04-01	4.11244107128830
2006-07-01	3.96041270240746
2006-10-01	3.63967837524373
2007-01-01	4.05053510780139
2007-04-01	3.72719555679487
2007-07-01	3.77252185719856
2007-10-01	3.65011334631145
2008-01-01	3.91331919215388
2008-04-01	3.98044386567766
2008-07-01	4.02019148130092
2008-10-01	3.72348013101956
2009-01-01	4.57939247717610
2009-04-01	4.95324740708982
2009-07-01	5.14874054354642
2009-10-01	4.74611771114341
2010-01-01	4.59820281871218
2010-04-01	4.94281912168473
2010-07-01	4.68075951163865
2010-10-01	4.35441358696263
2011-01-01	4.29388014833132
2011-04-01	4.51649913968965
2011-07-01	4.21931522891972
2011-10-01	3.85590293514736
2012-01-01	4.22445820424055
2012-04-01	4.40646074674178
2012-07-01	4.00747518067819
2012-10-01	3.74474939499145
2013-01-01	3.76224860133376
2013-04-01	4.03388417732434
2013-07-01	3.54930105244954
2013-10-01	3.47545644295197
2014-01-01	3.41881456452848
2014-04-01	3.70214565423718
2014-07-01	3.43940992808415
2014-10-01	3.08053502458168
2015-01-01	3.18610168064878
2015-04-01	3.36320057528689
2015-07-01	3.17665005654502
2015-10-01	2.79101821839167
2016-01-01	2.88283733675869
2016-04-01	3.23494187945677
2016-07-01	2.78950436602173
2016-10-01	2.62482726282667
2017-01-01	2.66891796769755
2017-04-01	2.99198723317586
2017-07-01	2.62054401994912
2017-10-01	2.48699621957492
2018-01-01	2.29877512847295
2018-04-01	2.36018892207299
2018-07-01	2.30675663515395