Quarter	Percent
1996-03-31	6.031
1996-06-30	5.91
1996-09-30	5.7258
1996-12-31	5.8042
1997-03-31	5.9351
1997-06-30	6.0894
1997-09-30	6.7828
1997-12-31	7.0792
1998-03-31	7.225
1998-06-30	7.1879
1998-09-30	7.3153
1998-12-31	6.8338
1999-03-31	5.6589
1999-06-30	5.0797
1999-09-30	4.8927
1999-12-31	5.069
2000-03-31	5.6563
2000-06-30	5.8703
2000-09-30	5.9291
2000-12-31	5.8778
2001-03-31	5.6627
2001-06-30	5.1492
2001-09-30	4.9434
2001-12-31	4.2336
2002-03-31	3.9142
2002-06-30	3.7271
2002-09-30	3.8583
2002-12-31	3.9523
2003-03-31	3.7044
2003-06-30	3.5703
2003-09-30	3.3896
2003-12-31	3.5341
2004-03-31	3.8127
2004-06-30	4.1011
2004-09-30	4.5992
2004-12-31	4.7459
2005-03-31	4.7274
2005-06-30	4.7728
2005-09-30	4.5958
2005-12-31	4.5071
2006-03-31	4.4591
2006-06-30	4.5021
2006-09-30	4.6665
2006-12-31	4.9446
2007-03-31	5.2203
2007-06-30	5.4007
2007-09-30	5.8423
2007-12-31	5.7157
2008-03-31	5.3775
2008-06-30	5.0862
2008-09-30	4.9638
2008-12-31	3.1079
2009-03-31	1.0738
2009-06-30	0.492
2009-09-30	0.4448
2009-12-31	0.4627
2010-03-31	0.4971
2010-06-30	0.4881
2010-09-30	0.527
2010-12-31	0.5361
2011-03-31	0.4943
2011-06-30	0.5203
2011-09-30	0.5213
2011-12-31	0.4662
2012-03-31	0.4654
2012-06-30	0.4523
2012-09-30	0.454
2012-12-31	0.4341
2013-03-31	0.4423
2013-06-30	0.4498
2013-09-30	0.4368
2013-12-31	0.4105
2014-03-31	0.4242
2014-06-30	0.4174
2014-09-30	0.4578
2014-12-31	0.4635
2015-03-31	0.4845
2015-06-30	0.5026
2015-09-30	0.5061
2015-12-31	0.5005
2016-03-31	0.519
2016-06-30	0.4998
2016-09-30	0.3357
2016-12-31	0.2308
2017-03-31	0.2088
2017-06-30	0.2023
2017-09-30	0.205
2017-12-31	0.3654
2018-03-31	0.4586
2018-06-30	0.479