Quarter	Percent
1998-04-01	13.61189729891320
1999-04-01	12.59430946017530
2000-04-01	11.27338720862180
2001-04-01	9.66738727713468
2002-04-01	9.82266443835490
2003-04-01	10.10132648426860
2004-04-01	10.25656858810090
2005-01-01	10.36805973958910
2005-04-01	9.87569806176507
2005-07-01	9.77124684788964
2005-10-01	10.10771379701030
2006-01-01	10.04010079982470
2006-04-01	9.16993161781602
2006-07-01	9.01706083136782
2006-10-01	9.12543255835396
2007-01-01	8.89349681017853
2007-04-01	8.28958557091009
2007-07-01	8.09181253754117
2007-10-01	8.25991407752280
2008-01-01	8.28316011090400
2008-04-01	8.05883258502661
2008-07-01	7.96898176148906
2008-10-01	8.48419466946520
2009-01-01	9.53451907029926
2009-04-01	9.43840789468178
2009-07-01	9.61222817804844
2009-10-01	9.95806531711804
2010-01-01	10.47987672378350
2010-04-01	10.08672839290820
2010-07-01	9.94835811185306
2010-10-01	10.37099423903030
2011-01-01	10.57679172323810
2011-04-01	9.92010384696995
2011-07-01	10.18342382833340
2011-10-01	10.80739544660520
2012-01-01	11.44784206110750
2012-04-01	11.17900854822640
2012-07-01	11.29929048516800
2012-10-01	11.95551398607120
2013-01-01	12.47853142671470
2013-04-01	11.94141479642850
2013-07-01	11.68492699049340
2013-10-01	12.16085152856220
2014-01-01	12.30670731047030
2014-04-01	11.56346904071220
2014-07-01	11.45581888545940
2014-10-01	11.81094431148820
2015-01-01	11.71666907419830
2015-04-01	11.00894846159640
2015-07-01	10.53442176797350
2015-10-01	10.88424795085810
2016-01-01	10.91600212083400
2016-04-01	10.38249397600010
2016-07-01	10.06220075950680
2016-10-01	10.10916972501460
2017-01-01	10.19211227486220
2017-04-01	9.31712547257408
2017-07-01	9.13343454656736
2017-10-01	9.10566912851594
2018-01-01	9.27465818726206
2018-04-01	8.53006213462370