Quarter	Percent
1987-03-31	7.68
1987-09-30	7.76
1987-12-31	7.2
1988-03-31	6.76
1988-06-30	7.77
1988-09-30	8.31
1988-12-31	9.14
1989-03-31	10.12
1989-06-30	9.26
1989-09-30	9.02
1989-12-31	8.32
1990-03-31	8.34
1990-06-30	8.21
1990-09-30	8.19
1990-12-31	7.52
1991-03-31	6.27
1991-06-30	6.03
1991-09-30	5.35
1991-12-31	4.16
1992-03-31	4.21
1992-06-30	3.85
1992-09-30	3.1
1992-12-31	3.28
1993-03-31	3.12
1993-06-30	3.15
1993-09-30	3.1
1993-12-31	3.22
1994-03-31	3.72
1994-06-30	4.65
1994-09-30	5.1
1994-12-31	6.16
1995-03-31	6.1
1995-06-30	5.97
1995-09-30	5.78
1995-12-31	5.54
1996-03-31	5.34
1996-06-30	5.44
1996-09-30	5.39
1996-12-31	5.44
1997-03-31	5.63
1997-06-30	5.61
1997-09-30	5.58
1997-12-31	5.65
1998-03-31	5.58
1998-06-30	5.59
1998-09-30	5.24
1998-12-31	4.98
1999-03-31	4.87
1999-06-30	5.18
1999-09-30	5.42
1999-12-31	5.82
2000-03-31	6.13
2000-06-30	6.63
2000-09-30	6.58
2000-12-31	6.43
2001-03-31	4.92
2001-06-30	3.8
2001-09-30	2.53
2001-12-31	1.8
2002-03-31	1.88
2002-06-30	1.79
2002-09-30	1.74
2002-12-31	1.32
2003-03-31	1.24
2003-06-30	1.06
2003-09-30	1.07
2003-12-31	1.08
2004-03-31	1.05
2004-06-30	1.44
2004-09-30	1.87
2004-12-31	2.43
2005-03-31	2.99
2005-06-30	3.42
2005-09-30	3.94
2005-12-31	4.45
2006-03-31	4.88
2006-06-30	5.39
2006-09-30	5.31
2006-12-31	5.31
2007-03-31	5.3
2007-06-30	5.31
2007-09-30	5.22
2007-12-31	4.66
2008-03-31	2.71
2008-06-30	2.72
2008-09-30	4.5
2008-12-31	1.12
2009-03-31	0.95
2009-06-30	0.42
2009-09-30	0.25
2009-12-31	0.24
2010-03-31	0.25
2010-06-30	0.45
2010-09-30	0.27
2010-12-31	0.35
2011-03-31	0.28
2011-06-30	0.19
2011-09-30	0.27
2011-12-31	0.42
2012-03-31	0.4
2012-06-30	0.34
2012-09-30	0.29
2012-12-31	0.26
2013-03-31	0.24