Quarter	Percent
1998-04-01	3.35794183445190
1999-04-01	2.69404462637094
2000-01-01	2.88039663039663
2000-04-01	2.16685903438664
2000-07-01	2.13448328168678
2000-10-01	2.14254952627046
2001-01-01	2.17246205188933
2001-04-01	1.81337687729626
2001-07-01	1.57304336614089
2001-10-01	1.69277790839336
2002-01-01	2.33439701882509
2002-04-01	2.29661429145431
2002-07-01	2.52968945151252
2002-10-01	2.68635813864664
2003-01-01	3.51090621931959
2003-04-01	3.43435202108216
2003-07-01	3.41659062453579
2003-10-01	3.70858673925063
2004-01-01	4.56861413043478
2004-04-01	4.33180894308943
2004-07-01	4.01566469093988
2004-10-01	4.40059410142160
2005-01-01	5.03128536955175
2005-04-01	4.58016891101325
2005-07-01	4.08511000830653
2005-10-01	4.07766990291262
2006-01-01	4.16542378659394
2006-04-01	3.54412639089442
2006-07-01	3.29119810602858
2006-10-01	3.12546133243352
2007-01-01	3.36872708886361
2007-04-01	2.80254242621300
2007-07-01	2.56249477468439
2007-10-01	2.46218487394958
2008-01-01	2.94598674830160
2008-04-01	2.49771043210390
2008-07-01	2.28306690596436
2008-10-01	2.41066246579886
2009-01-01	3.11482549096866
2009-04-01	3.21502004195310
2009-07-01	3.38605619146722
2009-10-01	3.75864655387949
2010-01-01	4.78932051119828
2010-04-01	4.46658504665006
2010-07-01	4.24202773146487
2010-10-01	4.09620682347955
2011-01-01	4.79214780600462
2011-04-01	4.48193080979123
2011-07-01	4.36327277368847
2011-10-01	4.76845872064709
2012-01-01	5.41145184778709
2012-04-01	5.27179055830092
2012-07-01	5.32975781446409
2012-10-01	5.86326718579921
2013-01-01	7.02157431966751
2013-04-01	7.11264818017042
2013-07-01	7.22476111341919
2013-10-01	7.41048433995182
2014-01-01	7.88778122333451
2014-04-01	7.22480168231693
2014-07-01	6.68193649141072
2014-10-01	6.74515524067514
2015-01-01	7.09742006799174
2015-04-01	6.57269163399783
2015-07-01	6.22696128454506
2015-10-01	6.20537019250846
2016-01-01	6.35301481326935
2016-04-01	5.83069751956051
2016-07-01	5.22322913202527
2016-10-01	4.88692866207585
2017-01-01	5.11696513898700
2017-04-01	4.57437768151388
2017-07-01	4.18394503930185
2017-10-01	4.03530115264862
2018-01-01	4.15071819566202
2018-04-01	3.76425699515878