Quarter	Percent
1978-04-01	4.06332100710291
1978-07-01	3.88660459746691
1978-10-01	3.66398726058201
1979-01-01	4.04072599550699
1979-04-01	3.80773313477417
1979-07-01	3.63013689918132
1979-10-01	3.53253399419798
1980-01-01	3.86469528484524
1980-04-01	3.77255851856920
1980-07-01	3.64198576452722
1980-10-01	3.42929638872900
1981-01-01	3.74444324592297
1981-04-01	3.58819983295019
1981-07-01	3.69227533700067
1981-10-01	3.66888589563446
1982-01-01	4.17873698271921
1982-04-01	4.24509657411276
1982-07-01	4.67563384900768
1982-10-01	5.68732208587966
1983-01-01	6.90395206409960
1983-04-01	7.28150823016835
1983-07-01	7.17486819176423
1983-10-01	6.44418640335600
1984-01-01	6.91240569196912
1984-04-01	6.44134369459290
1984-07-01	6.05407278887448
1984-10-01	5.62527167066765
1985-01-01	6.25929761611345
1985-04-01	6.21362404234182
1985-07-01	5.75641195746711
1985-10-01	5.31529098318794
1986-01-01	5.87695389744080
1986-04-01	5.62767921661584
1986-07-01	5.81070909852608
1986-10-01	5.61275321786423
1987-01-01	6.30154524441852
1987-04-01	6.06368849501210
1987-07-01	5.69472982115176
1987-10-01	5.42781337666459
1988-01-01	5.71267275547373
1988-04-01	5.58814581064607
1988-07-01	5.03732821916031
1988-10-01	4.70791982659865
1989-01-01	5.22596138477211
1989-04-01	4.71223629489253
1989-07-01	4.42819104179480
1989-10-01	4.11890541886137
1990-01-01	4.78978369294017
1990-04-01	4.75915104648585
1990-07-01	5.21847801789335
1990-10-01	5.50166369954816
1991-01-01	6.91040934279393
1991-04-01	7.19949254168621
1991-07-01	7.50500330550696
1991-10-01	7.53262147344304
1992-01-01	8.40221397500585
1992-04-01	8.17027171658483
1992-07-01	8.23871077313441
1992-10-01	8.38318565029899
1993-01-01	9.19692896193629
1993-04-01	8.72471061748524
1993-07-01	8.62015328172825
1993-10-01	8.47053314501002
1994-01-01	8.73570657972154
1994-04-01	7.77354113888566
1994-07-01	7.41996913758853
1994-10-01	7.04160202842150
1995-01-01	7.38345751653392
1995-04-01	6.51293002687893
1995-07-01	6.44741993873984
1995-10-01	6.24296107190148
1996-01-01	6.83645110372554
1996-04-01	6.57454236277242
1996-07-01	6.66950431079884
1996-10-01	6.41656697988837
1997-01-01	7.09652617307886
1997-04-01	6.58553155929568
1997-07-01	6.38402438744862
1997-10-01	5.91818639753167
1998-01-01	6.47759219049945
1998-04-01	6.03638902081278
1998-07-01	6.02971980390901
1998-10-01	5.57915255724779
1999-01-01	5.89322868892750
1999-04-01	5.38390957530226
1999-07-01	5.28045096675123
1999-10-01	4.96786871557477
2000-01-01	5.56479857664086
2000-04-01	4.98616668544696
2000-07-01	4.56942607191904
2000-10-01	4.54296947986339
2001-01-01	5.14631746856702
2001-04-01	5.23221196204112
2001-07-01	5.13508100047224
2001-10-01	5.07612148593397
2002-01-01	5.44570925731011
2002-04-01	4.94819593314654
2002-07-01	4.64099035483532
2002-10-01	4.43804859141273
2003-01-01	4.95785990794607
2003-04-01	4.65039711244237
2003-07-01	4.37978958967695
2003-10-01	4.08006435316091
2004-01-01	4.42243547425658
2004-04-01	4.11831096856101
2004-07-01	3.94789645515339
2004-10-01	3.49256365259014
2005-01-01	4.06756532595247
2005-04-01	3.79829924464298
2005-07-01	3.55471852739586
2005-10-01	3.49520831212828
2006-01-01	4.06359581886173
2006-04-01	3.66603734872943
2006-07-01	3.37446579972958
2006-10-01	3.16348499759917
2007-01-01	3.69027276528130
2007-04-01	3.28547408821805
2007-07-01	3.00272237129677
2007-10-01	2.93747930782165
2008-01-01	3.26932472238105
2008-04-01	3.18749926669845
2008-07-01	3.11884162271759
2008-10-01	3.14685158553137
2009-01-01	4.32245182541062
2009-04-01	4.36395594910011
2009-07-01	4.23496849857465
2009-10-01	4.04494213651970
2010-01-01	4.24904940975141
2010-04-01	3.91532358053320
2010-07-01	3.65702166545654
2010-10-01	3.49665982050679
2011-01-01	3.78780700297332
2011-04-01	3.65004812707485
2011-07-01	3.82524863006290
2011-10-01	3.68392728227362
2012-01-01	4.03505524475914
2012-04-01	3.76963878237971
2012-07-01	3.84275750442723
2012-10-01	3.78739753675462
2013-01-01	4.38271535274708
2013-04-01	4.37679518230910
2013-07-01	4.25202768788160
2013-10-01	4.23937930526551
2014-01-01	4.91008391739530
2014-04-01	4.43842440803084
2014-07-01	4.62677690188986
2014-10-01	4.44926723174596
2015-01-01	4.92559478799490
2015-04-01	4.53734838464417
2015-07-01	4.75824591158160
2015-10-01	4.28686766502527
2016-01-01	4.80184654645914
2016-04-01	4.30696263595902
2016-07-01	4.19147322010536
2016-10-01	4.02013948656243
2017-01-01	4.68750766348743
2017-04-01	4.17736950328786
2017-07-01	4.10328486131366
2017-10-01	3.89936063469552
2018-01-01	4.40034259582891
2018-04-01	4.15932730359036
2018-07-01	3.95233056449750