Quarter	Percent
1996-03-31	5.9771
1996-06-30	5.8559
1996-09-30	5.6865
1996-12-31	5.9075
1997-03-31	5.9649
1997-06-30	6.1743
1997-09-30	6.826
1997-12-31	7.1158
1998-03-31	7.2185
1998-06-30	7.2306
1998-09-30	7.3362
1998-12-31	6.597
1999-03-31	5.4187
1999-06-30	4.995
1999-09-30	4.9015
1999-12-31	5.2348
2000-03-31	5.7823
2000-06-30	5.8413
2000-09-30	5.8208
2000-12-31	5.7683
2001-03-31	5.5855
2001-06-30	5.1271
2001-09-30	4.8422
2001-12-31	4.0279
2002-03-31	3.8726
2002-06-30	3.8588
2002-09-30	3.8159
2002-12-31	3.8254
2003-03-31	3.6708
2003-06-30	3.5291
2003-09-30	3.3912
2003-12-31	3.6109
2004-03-31	3.8932
2004-06-30	4.2353
2004-09-30	4.6323
2004-12-31	4.6932
2005-03-31	4.7128
2005-06-30	4.7142
2005-09-30	4.5209
2005-12-31	4.46
2006-03-31	4.4331
2006-06-30	4.493
2006-09-30	4.6795
2006-12-31	4.9787
2007-03-31	5.2719
2007-06-30	5.482
2007-09-30	5.8112
2007-12-31	5.6736
2008-03-31	5.2969
2008-06-30	5.0778
2008-09-30	5.0991
2008-12-31	2.9813
2009-03-31	0.9259
2009-06-30	0.547
2009-09-30	0.4404
2009-12-31	0.4587
2010-03-31	0.5025
2010-06-30	0.508
2010-09-30	0.5276
2010-12-31	0.5489
2011-03-31	0.5478
2011-06-30	0.5414
2011-09-30	0.5286
2011-12-31	0.4953
2012-03-31	0.4658
2012-06-30	0.4612
2012-09-30	0.4535
2012-12-31	0.437
2013-03-31	0.4452
2013-06-30	0.4552
2013-09-30	0.4502
2013-12-31	0.4348
2014-03-31	0.4319
2014-06-30	0.4363
2014-09-30	0.4718
2014-12-31	0.4767
2015-03-31	0.4915
2015-06-30	0.5143
2015-09-30	0.5259
2015-12-31	0.538
2016-03-31	0.5484
2016-06-30	0.5344
2016-09-30	0.3539
2016-12-31	0.279
2017-03-31	0.2682
2017-06-30	0.2609
2017-09-30	0.2451
2017-12-31	0.4185
2018-03-31	0.4794
2018-06-30	0.506