Quarter	Percent
1998-01-01	8.08547817539772
1998-04-01	7.10993358255000
1998-07-01	6.87714234169222
1998-10-01	7.48545198250624
1999-01-01	8.25284705203979
1999-04-01	7.69063968196603
1999-07-01	7.71259302073550
1999-10-01	8.53905009383572
2000-01-01	8.16297097530196
2000-04-01	7.44012352328629
2000-07-01	7.08878923766816
2000-10-01	7.23641597697013
2001-01-01	7.48889432998706
2001-04-01	6.91295829834873
2001-07-01	6.87012214328212
2001-10-01	7.72682653204319
2002-01-01	7.71256055606263
2002-04-01	6.43393262349450
2002-07-01	6.31725578965697
2002-10-01	6.72093508662075
2003-01-01	6.86040477426051
2003-04-01	6.03006372956498
2003-07-01	5.76617087512971
2003-10-01	6.23441396508728
2004-01-01	7.46551724137931
2004-04-01	6.41303227136818
2004-07-01	6.20846389587135
2004-10-01	6.50115354154471
2005-01-01	6.63412622026674
2005-04-01	5.90536320900388
2005-07-01	6.13070148384223
2005-10-01	6.22022687549265
2006-01-01	6.39298987350404
2006-04-01	5.63183060109290
2006-07-01	5.16611465838085
2006-10-01	5.56295916623954
2007-01-01	5.81518580561348
2007-04-01	4.98426382047072
2007-07-01	4.91953866566870
2007-10-01	5.24487432736190
2008-01-01	5.61942989319001
2008-04-01	4.72499830036032
2008-07-01	4.74878388951254
2008-10-01	5.41343625123809
2009-01-01	6.89560908935589
2009-04-01	6.44323733387995
2009-07-01	6.71890971039182
2009-10-01	7.81180343609616
2010-01-01	9.15268197261402
2010-04-01	9.46990612921038
2010-07-01	9.84333841674754
2010-10-01	11.68958057087030
2011-01-01	13.45842427656130
2011-04-01	13.82640067911710
2011-07-01	15.18050862528900
2011-10-01	18.05939598520490
2012-01-01	19.88838883888390
2012-04-01	20.96838301716350
2012-07-01	21.83486904157300
2012-10-01	23.47576484267130
2013-01-01	24.87664022807850
2013-04-01	24.32304384270560
2013-07-01	24.01270165705530
2013-10-01	24.68182152578530
2014-01-01	24.98709724987100
2014-04-01	23.52788490062300
2014-07-01	22.60604709902680
2014-10-01	23.25258215962440
2015-01-01	23.48310798086700
2015-04-01	21.54210348326010
2015-07-01	20.69648395172440
2015-10-01	21.15896397915960
2016-01-01	21.19157910593910
2016-04-01	19.44663734446070
2016-07-01	18.91800697334380
2016-10-01	19.87370968351800
2017-01-01	19.76963746223560
2017-04-01	17.66830993865950
2017-07-01	16.49295140971810
2017-10-01	17.34867698830300
2018-01-01	17.24020313802770
2018-04-01	15.23093772423430