Quarter	Percent
1998-04-01	13.50135013501350
1998-10-01	13.50702143385070
1999-04-01	13.36311185557420
1999-10-01	13.14956230210470
2000-04-01	13.36999810354640
2000-10-01	13.08079865646580
2001-04-01	12.46240601503760
2001-10-01	12.59693588046150
2002-01-01	12.59659969088100
2002-04-01	12.75613808381020
2002-07-01	10.79803328290470
2002-10-01	10.72218128224020
2003-01-01	11.91109422492400
2003-04-01	12.02614379084970
2003-07-01	11.33455210237660
2003-10-01	11.48775894538610
2004-01-01	12.31454005934720
2004-04-01	12.26982337467120
2004-07-01	11.11938908549080
2004-10-01	12.26138032305430
2005-01-01	12.33326889619180
2005-04-01	9.91580916744621
2005-07-01	9.34401220442410
2005-10-01	8.35970955129399
2006-01-01	8.73768006065201
2006-04-01	6.42987249544627
2006-07-01	5.53930530164534
2006-10-01	6.33284241531664
2007-01-01	6.03270062018418
2007-04-01	5.98867993427059
2007-07-01	5.33453887884268
2007-10-01	4.94446434969545
2008-01-01	6.05192479856759
2008-04-01	6.59996489380376
2008-07-01	6.94173897644767
2008-10-01	8.71657754010695
2009-01-01	11.08165429480380
2009-04-01	13.70967741935480
2009-07-01	15.54809843400450
2009-10-01	16.36730205278590
2010-01-01	15.75677710843370
2010-04-01	17.10722263588980
2010-07-01	16.21172998893400
2010-10-01	16.13935969868170
2011-01-01	15.05016722408030
2011-04-01	14.11584196394320
2011-07-01	13.11695794123300
2011-10-01	12.93570875290470
2012-01-01	15.05941944282100
2012-04-01	15.18624641833810
2012-07-01	13.28617855094630
2012-10-01	12.29082515868440
2013-01-01	11.42181961402130
2013-04-01	10.75899843505480
2013-07-01	11.57935433984150
2013-10-01	10.78936929789770
2014-01-01	10.01592990840300
2014-04-01	9.10364145658263
2014-07-01	10.12965964343600
2014-10-01	10.10748243075650
2015-01-01	9.51408738260514
2015-04-01	8.07917592405575
2015-07-01	8.30997196635963
2015-10-01	8.68336025848142
2016-01-01	9.48466011630239
2016-04-01	8.44337735094038
2016-07-01	7.86061588330632
2016-10-01	7.81660270652393
2017-01-01	8.14572247237004
2017-04-01	7.34934853420196
2017-07-01	7.92818236836796
2017-10-01	7.29124236252546
2018-01-01	7.38555442522889
2018-04-01	6.10470992520720