Quarter	Percent
1988-03-31	6.69
1988-06-30	7.23
1988-09-30	8.08
1988-12-31	8.74
1989-03-31	9.51
1989-06-30	9.64
1989-09-30	8.91
1989-12-31	8.6
1990-03-31	8.24
1990-06-30	8.25
1990-09-30	8.06
1990-12-31	8.04
1991-03-31	6.71
1991-06-30	5.96
1991-09-30	5.7
1991-12-31	4.98
1992-03-31	4.13
1992-06-30	3.88
1992-09-30	3.29
1992-12-31	3.32
1993-03-31	3.09
1993-06-30	3.08
1993-09-30	3.08
1993-12-31	3.15
1994-03-31	3.31
1994-06-30	4.11
1994-09-30	4.63
1994-12-31	5.45
1995-03-31	5.97
1995-06-30	5.99
1995-09-30	5.8
1995-12-31	5.76
1996-03-31	5.34
1996-06-30	5.35
1996-09-30	5.36
1996-12-31	5.36
1997-03-31	5.36
1997-06-30	5.59
1997-09-30	5.55
1997-12-31	5.66
1998-03-31	5.55
1998-06-30	5.56
1998-09-30	5.52
1998-12-31	5.25
1999-03-31	4.85
1999-06-30	4.87
1999-09-30	5.19
1999-12-31	5.72
2000-03-31	5.86
2000-06-30	6.41
2000-09-30	6.57
2000-12-31	6.59
2001-03-31	5.45
2001-06-30	4.22
2001-09-30	3.19
2001-12-31	2.14
2002-03-31	1.79
2002-06-30	1.79
2002-09-30	1.76
2002-12-31	1.51
2003-03-31	1.28
2003-06-30	1.21
2003-09-30	1.06
2003-12-31	1.08
2004-03-31	1.05
2004-06-30	1.11
2004-09-30	1.55
2004-12-31	2.09
2005-03-31	2.59
2005-06-30	3.06
2005-09-30	3.56
2005-12-31	4.12
2006-03-31	4.58
2006-06-30	5.06
2006-09-30	5.32
2006-12-31	5.3
2007-03-31	5.29
2007-06-30	5.3
2007-09-30	5.43
2007-12-31	4.95
2008-03-31	3.32
2008-06-30	2.63
2008-09-30	2.72
2008-12-31	2.46
2009-03-31	0.57
2009-06-30	0.39
2009-09-30	0.28
2009-12-31	0.23
2010-03-31	0.22
2010-06-30	0.33
2010-09-30	0.31
2010-12-31	0.27
2011-03-31	0.26
2011-06-30	0.217
2011-09-30	0.2054
2011-12-31	0.2551
2012-03-31	0.3373
2012-06-30	0.2462
2012-09-30	0.2303
2012-12-31	0.2111
2013-03-31	0.2046