Quarter	Percent
1997-03-31	7.075
1997-06-30	7.1848
1997-09-30	7.3322
1997-12-31	7.3389
1998-03-31	7.1867
1998-06-30	7.203
1998-09-30	7.1472
1998-12-31	5.8729
1999-03-31	4.9925
1999-06-30	5.0074
1999-09-30	5.4025
1999-12-31	6.0523
2000-03-31	6.4705
2000-06-30	6.3329
2000-09-30	6.1183
2000-12-31	5.8033
2001-03-31	5.2946
2001-06-30	5.1043
2001-09-30	4.9048
2001-12-31	4.0778
2002-03-31	4.4058
2002-06-30	4.5768
2002-09-30	4.0321
2002-12-31	3.8705
2003-03-31	3.5279
2003-06-30	3.3687
2003-09-30	3.6041
2003-12-31	4.2019
2004-03-31	4.3221
2004-06-30	4.8546
2004-09-30	4.9951
2004-12-31	4.7867
2005-03-31	4.8578
2005-06-30	4.6928
2005-09-30	4.3582
2005-12-31	4.4679
2006-03-31	4.4739
2006-06-30	4.7466
2006-09-30	4.9895
2006-12-31	5.2556
2007-03-31	5.6148
2007-06-30	5.8983
2007-09-30	5.9709
2007-12-31	5.4234
2008-03-31	4.8274
2008-06-30	5.0837
2008-09-30	5.0781
2008-12-31	2.4654
2009-03-31	0.8951
2009-06-30	0.8307
2009-09-30	0.6885
2009-12-31	0.6905
2010-03-31	0.7329
2010-06-30	0.6918
2010-09-30	0.6355
2010-12-31	0.6523
2011-03-31	0.9075
2011-06-30	0.7858
2011-09-30	0.5878
2011-12-31	0.5343
2012-03-31	0.478
2012-06-30	0.4512
2012-09-30	0.373
2012-12-31	0.3995
2013-03-31	0.4146