Quarter	Percent
1999-01-01	7.46305540453714
1999-04-01	6.92962179707864
1999-07-01	7.01831394639940
1999-10-01	6.57283878219225
2000-01-01	6.76225968064365
2000-04-01	6.56357388316151
2000-07-01	6.32093124984812
2000-10-01	6.02108835292692
2001-01-01	6.04386242484726
2001-04-01	5.67098508922024
2001-07-01	5.61323500873278
2001-10-01	5.57999706701862
2002-01-01	5.82233776426154
2002-04-01	5.60857149830376
2002-07-01	5.95779692188559
2002-10-01	5.93115793038388
2003-01-01	6.41578972891712
2003-04-01	5.79097740750522
2003-07-01	5.72996183206107
2003-10-01	5.54227809378137
2004-01-01	6.07516111124520
2004-04-01	5.83270863057094
2004-07-01	6.11376799404004
2004-10-01	6.29449411539107
2005-01-01	7.06413427137609
2005-04-01	7.11523773152568
2005-07-01	7.26512879843222
2005-10-01	7.30870275259757
2006-01-01	7.72020479757277
2006-04-01	7.22919955701124
2006-07-01	7.54269894894895
2006-10-01	7.48597845727830
2007-01-01	7.54663181656172
2007-04-01	7.03840858377249
2007-07-01	7.25179107653749
2007-10-01	7.78905822772772
2008-01-01	7.96814671814672
2008-04-01	7.58760010581756
2008-07-01	7.66474454806483
2008-10-01	8.04820314181192
2009-01-01	9.76965653928891
2009-04-01	9.62351133307722
2009-07-01	10.32082107227450
2009-10-01	10.40331068797240
2010-01-01	11.83885733457950
2010-04-01	11.20821030574340
2010-07-01	10.84422799593370
2010-10-01	10.80380499405470
2011-01-01	11.79483497283450
2011-04-01	10.89435134046030
2011-07-01	10.72620446533490
2011-10-01	10.71537863986250
2012-01-01	11.94096706509180
2012-04-01	10.99725185150680
2012-07-01	10.46800866000280
2012-10-01	10.62624300448640
2013-01-01	11.60785416373780
2013-04-01	10.17923961749900
2013-07-01	9.83088857868601
2013-10-01	9.12295963920240
2014-01-01	8.27124034529759
2014-04-01	8.10237907317623
2014-07-01	7.39938840650878
2014-10-01	7.14093538406350
2015-01-01	7.78534312847160
2015-04-01	6.88080512513578
2015-07-01	6.42238069116840
2015-10-01	6.18268320081056
2016-01-01	6.01556814924254
2016-04-01	5.11492746023422
2016-07-01	4.90557047561293
2016-10-01	4.44107452339688
2017-01-01	4.52051500644851
2017-04-01	4.25485820750016
2017-07-01	4.06320055181928
2017-10-01	3.79007484965171
2018-01-01	3.85640892241660
2018-04-01	3.55841972541328