Quarter	Percent
1999-01-01	6.36594522968198
1999-04-01	6.21627574055721
1999-07-01	6.38669211889828
1999-10-01	6.10415869719657
2000-01-01	5.76637109654679
2000-04-01	5.78476075372191
2000-07-01	5.71039738704409
2000-10-01	5.26059161339257
2001-01-01	5.10049708234277
2001-04-01	4.87619047619048
2001-07-01	5.07808292945611
2001-10-01	4.82530022278976
2002-01-01	5.13864018666233
2002-04-01	5.07915923704544
2002-07-01	5.82882834662527
2002-10-01	5.70224569264416
2003-01-01	5.93296860891273
2003-04-01	5.38644157214455
2003-07-01	5.52009208874006
2003-10-01	5.46393904602860
2004-01-01	5.74621751278402
2004-04-01	5.85492502516823
2004-07-01	6.29539951573850
2004-10-01	6.47271205065146
2005-01-01	7.19435736677116
2005-04-01	7.35775526110678
2005-07-01	7.64833127317676
2005-10-01	7.50142170294163
2006-01-01	7.83020811868947
2006-04-01	7.67206686616448
2006-07-01	8.20210310335984
2006-10-01	7.94262800740284
2007-01-01	7.65986252863987
2007-04-01	7.25667415495533
2007-07-01	7.84965216488423
2007-10-01	8.16315926214601
2008-01-01	8.32849833851996
2008-04-01	7.78629992065591
2008-07-01	7.91883454734651
2008-10-01	7.98021863612702
2009-01-01	9.42620791401022
2009-04-01	9.29413002314328
2009-07-01	10.05750130684790
2009-10-01	10.17478152309610
2010-01-01	10.88976052848890
2010-04-01	10.48407839909460
2010-07-01	10.69589599796070
2010-10-01	10.58497252323970
2011-01-01	11.25187445059210
2011-04-01	10.98810988109880
2011-07-01	10.87311301509590
2011-10-01	10.82484725050920
2012-01-01	11.51592356687900
2012-04-01	10.37731096670190
2012-07-01	10.13161162155450
2012-10-01	10.43669871794870
2013-01-01	10.79738429563540
2013-04-01	10.31150923456290
2013-07-01	10.05606166783460
2013-10-01	9.38871160749900
2014-01-01	8.49876543209876
2014-04-01	8.24124551839301
2014-07-01	7.73572054101391
2014-10-01	7.19091263650546
2015-01-01	7.83808737062054
2015-04-01	7.09696120585536
2015-07-01	6.75067075507858
2015-10-01	6.48143689507392
2016-01-01	6.06586624234534
2016-04-01	4.91756134969325
2016-07-01	4.96353130624230
2016-10-01	4.49555176982775
2017-01-01	4.68802375137672
2017-04-01	4.58942953819759
2017-07-01	4.62318222727488
2017-10-01	4.38504708456197
2018-01-01	4.27154843630816
2018-04-01	3.65188522646431