Quarter	Percent
1978-04-01	4.23679443561767
1978-07-01	3.99282073870459
1978-10-01	3.76267290214138
1979-01-01	4.16192267348327
1979-04-01	3.91785227917988
1979-07-01	3.75853056738967
1979-10-01	3.66702752076088
1980-01-01	4.07738714869433
1980-04-01	3.97758108397762
1980-07-01	3.78955586638955
1980-10-01	3.52442791535227
1981-01-01	3.89508649305035
1981-04-01	3.70387807362053
1981-07-01	3.76736435281136
1981-10-01	3.79498609899411
1982-01-01	4.37414436923016
1982-04-01	4.45719103022764
1982-07-01	4.90748446450208
1982-10-01	5.92437694952630
1983-01-01	7.18579479912526
1983-04-01	7.52099189235982
1983-07-01	7.39845868065830
1983-10-01	6.62802236665250
1984-01-01	7.10296503487640
1984-04-01	6.64896021013942
1984-07-01	6.21974114446961
1984-10-01	5.75055905447940
1985-01-01	6.37661151223569
1985-04-01	6.25270612823115
1985-07-01	5.74599471095904
1985-10-01	5.32629492763703
1986-01-01	6.03628532614294
1986-04-01	5.76116796520316
1986-07-01	5.92444948744064
1986-10-01	5.64663133461934
1987-01-01	6.42799049251547
1987-04-01	6.17554265013805
1987-07-01	5.80077931807701
1987-10-01	5.44056361567566
1988-01-01	5.71800157985232
1988-04-01	5.59385433487231
1988-07-01	5.00605342948752
1988-10-01	4.72759567472195
1989-01-01	5.18810383557796
1989-04-01	4.70942615859351
1989-07-01	4.41195447914272
1989-10-01	4.07903723569745
1990-01-01	4.80473546271437
1990-04-01	4.73851560533901
1990-07-01	5.23869146835077
1990-10-01	5.55700780913045
1991-01-01	6.99747322855087
1991-04-01	7.25014740490061
1991-07-01	7.47634905531347
1991-10-01	7.52054286350162
1992-01-01	8.42133453689554
1992-04-01	8.18233949140948
1992-07-01	8.19677004241786
1992-10-01	8.30877472615117
1993-01-01	9.12861525731279
1993-04-01	8.60704849166255
1993-07-01	8.48262112667490
1993-10-01	8.26706679087761
1994-01-01	8.55153027488807
1994-04-01	7.69060520332922
1994-07-01	7.33534957782600
1994-10-01	6.97568169564043
1995-01-01	7.41840152155609
1995-04-01	6.51664812989416
1995-07-01	6.41826574303941
1995-10-01	6.19767757114725
1996-01-01	6.79379845273842
1996-04-01	6.56587978095990
1996-07-01	6.65337352483298
1996-10-01	6.43921534953060
1997-01-01	7.17952043643767
1997-04-01	6.68390660347452
1997-07-01	6.42484606110742
1997-10-01	5.96797530209537
1998-01-01	6.54703638426876
1998-04-01	6.10320309601359
1998-07-01	6.10461718267311
1998-10-01	5.64799543137121
1999-01-01	5.95505835416430
1999-04-01	5.48105664622854
1999-07-01	5.35297367373435
1999-10-01	5.04331568631185
2000-01-01	5.67230452530007
2000-04-01	5.12246375372711
2000-07-01	4.71598555901926
2000-10-01	4.67254615293004
2001-01-01	5.32937118027387
2001-04-01	5.37601220838184
2001-07-01	5.25599885945600
2001-10-01	5.25319067754268
2002-01-01	5.64411787912161
2002-04-01	5.13999193665061
2002-07-01	4.81353406722240
2002-10-01	4.56198129223462
2003-01-01	5.17664145941615
2003-04-01	4.88240486264700
2003-07-01	4.56182508222811
2003-10-01	4.23184262559244
2004-01-01	4.63602589342618
2004-04-01	4.27075637172522
2004-07-01	4.05531834012920
2004-10-01	3.59969026732135
2005-01-01	4.16823619853754
2005-04-01	3.95286771236348
2005-07-01	3.70339629921448
2005-10-01	3.62701980142066
2006-01-01	4.24961129542953
2006-04-01	3.80865881792565
2006-07-01	3.44462089921826
2006-10-01	3.26504328089809
2007-01-01	3.82493737299740
2007-04-01	3.45105448286942
2007-07-01	3.18032322796596
2007-10-01	3.09214285252358
2008-01-01	3.43226575930652
2008-04-01	3.37575127025834
2008-07-01	3.34741010240544
2008-10-01	3.30456931970114
2009-01-01	4.60993365938671
2009-04-01	4.71619390446150
2009-07-01	4.54446358308223
2009-10-01	4.26980738657705
2010-01-01	4.43065519424682
2010-04-01	4.16993098639854
2010-07-01	3.83332654792823
2010-10-01	3.74115772460224
2011-01-01	4.01210524966736
2011-04-01	3.84774736825628
2011-07-01	4.01298316380767
2011-10-01	3.87399616694388
2012-01-01	4.25075343603832
2012-04-01	3.99601543520385
2012-07-01	3.97376875334881
2012-10-01	3.99192770813629
2013-01-01	4.60829823146735
2013-04-01	4.69729552944410
2013-07-01	4.42916224302700
2013-10-01	4.48865467786057
2014-01-01	5.08159878677105
2014-04-01	4.66592613274917
2014-07-01	4.94905056692954
2014-10-01	4.67003559012809
2015-01-01	5.20201835658764
2015-04-01	4.78342797835487
2015-07-01	4.99919209752559
2015-10-01	4.50244185247873
2016-01-01	5.01219343053890
2016-04-01	4.47494295705764
2016-07-01	4.30911973588155
2016-10-01	4.21044545499664
2017-01-01	4.95341546350515
2017-04-01	4.39980963640938
2017-07-01	4.25727320716101
2017-10-01	4.03817638391244
2018-01-01	4.52970567291244
2018-04-01	4.25888406885929
2018-07-01	4.04290615716419