Quarter	Percent
1978-04-01	3.47647975321672
1978-07-01	3.72918959561016
1978-10-01	3.67575433428362
1979-01-01	3.93398489477662
1979-04-01	3.58421206272639
1979-07-01	3.27295306682363
1979-10-01	2.92684923491417
1980-01-01	2.82889718868532
1980-04-01	2.88079691487729
1980-07-01	3.05931476506107
1980-10-01	2.98836838577313
1981-01-01	3.22856078484159
1981-04-01	3.45300050423855
1981-07-01	3.85785284531489
1981-10-01	3.37830235741209
1982-01-01	3.23630735835281
1982-04-01	3.15376784905238
1982-07-01	3.55751277463260
1982-10-01	5.17163484070593
1983-01-01	6.22002088292594
1983-04-01	7.33011168577321
1983-07-01	7.04765921269855
1983-10-01	6.66135686534076
1984-01-01	7.01467075862469
1984-04-01	6.21052543640824
1984-07-01	6.20856601529129
1984-10-01	6.01551206157783
1985-01-01	6.78329859367066
1985-04-01	7.43485038637257
1985-07-01	7.52202226966201
1985-10-01	6.47202221987780
1986-01-01	5.82366335796700
1986-04-01	5.49394876040656
1986-07-01	6.15172714151550
1986-10-01	6.95985593029710
1987-01-01	7.03441414779213
1987-04-01	6.79726162949651
1987-07-01	6.39833951770282
1987-10-01	6.91127006125189
1988-01-01	7.18157821122270
1988-04-01	7.26295870579140
1988-07-01	7.08344075147594
1988-10-01	5.81748986948868
1989-01-01	6.88148791462851
1989-04-01	6.02517637787759
1989-07-01	6.00138871063055
1989-10-01	5.49071657014910
1990-01-01	6.18606659298261
1990-04-01	6.60290069495380
1990-07-01	6.59130902859564
1990-10-01	6.48505013727126
1991-01-01	8.22420375443633
1991-04-01	9.22553272549835
1991-07-01	10.47434648548960
1991-10-01	10.57623977909250
1992-01-01	11.31460558211590
1992-04-01	11.05458986319340
1992-07-01	12.08731008898970
1992-10-01	12.77788475204130
1993-01-01	13.69071221340800
1993-04-01	13.52059627904750
1993-07-01	13.69385044748700
1993-10-01	13.88990754167060
1994-01-01	13.64889582252070
1994-04-01	11.24596555231460
1994-07-01	10.92964881996810
1994-10-01	10.19957341378990
1995-01-01	9.81903437182326
1995-04-01	9.16988305761111
1995-07-01	8.99949794783400
1995-10-01	9.01247983513425
1996-01-01	9.49154540153342
1996-04-01	8.56004415627728
1996-07-01	9.40615745831008
1996-10-01	8.66146855491292
1997-01-01	8.58845477999628
1997-04-01	7.81198782701143
1997-07-01	8.24302359958457
1997-10-01	7.25597206526246
1998-01-01	7.74941972439166
1998-04-01	7.18343675450641
1998-07-01	7.17172069791362
1998-10-01	6.91796347304878
1999-01-01	7.47394933573335
1999-04-01	6.47493658319432
1999-07-01	6.21849431672047
1999-10-01	6.00213520585287
2000-01-01	6.20808700170816
2000-04-01	5.32295011432819
2000-07-01	5.13805511424516
2000-10-01	4.64590544765471
2001-01-01	5.14928322826912
2001-04-01	5.73132833340168
2001-07-01	5.79067582652492
2001-10-01	5.48803401418827
2002-01-01	5.76805767729193
2002-04-01	5.11446124766060
2002-07-01	4.92113184855070
2002-10-01	4.73567358568220
2003-01-01	4.71103533202061
2003-04-01	4.19031968210844
2003-07-01	4.15698862098100
2003-10-01	3.96416241028987
2004-01-01	3.96831480530527
2004-04-01	3.95611132388165
2004-07-01	4.03628567967551
2004-10-01	3.58961410504764
2005-01-01	3.93507563249421
2005-04-01	3.65226334489075
2005-07-01	3.59633457666418
2005-10-01	3.62396459649328
2006-01-01	3.67680145527164
2006-04-01	3.76944111840659
2006-07-01	3.64964626144552
2006-10-01	3.09816289194236
2007-01-01	3.35948542684956
2007-04-01	2.84598998089436
2007-07-01	2.41009971117556
2007-10-01	2.65927296993470
2008-01-01	3.18303742826210
2008-04-01	3.17193363883366
2008-07-01	2.84705016716336
2008-10-01	3.01872507860200
2009-01-01	3.66031662520318
2009-04-01	3.61731629037390
2009-07-01	3.83044247238841
2009-10-01	3.70552118918530
2010-01-01	4.56982612953836
2010-04-01	3.86774469192964
2010-07-01	3.60811824742923
2010-10-01	2.89520880806580
2011-01-01	3.53449920879794
2011-04-01	3.61230740606238
2011-07-01	3.91488181329153
2011-10-01	3.61988283356726
2012-01-01	3.84350738440299
2012-04-01	3.30466059744360
2012-07-01	4.05158575280447
2012-10-01	3.69674652151589
2013-01-01	4.55277840598981
2013-04-01	4.03055729758332
2013-07-01	4.57901306618565
2013-10-01	4.20531048369789
2014-01-01	4.63088750683098
2014-04-01	4.14547926687659
2014-07-01	4.00570614760813
2014-10-01	4.49312659751871
2015-01-01	5.03486632458037
2015-04-01	4.65260566827354
2015-07-01	5.03698320637484
2015-10-01	4.59909246352571
2016-01-01	5.15704124596899
2016-04-01	4.78562541784692
2016-07-01	4.95095177562614
2016-10-01	4.35488606277399
2017-01-01	4.44966263362786
2017-04-01	4.44195873347174
2017-07-01	4.41711772428592
2017-10-01	4.18610765087559
2018-01-01	4.92294693165990
2018-04-01	4.90742720309045
2018-07-01	4.62080939651300