Quarter	Percent
1977-03-31	6.5
1977-06-30	4
1977-09-30	3
1977-12-31	3.5
1978-03-31	3
1978-06-30	6.75
1978-09-30	6.75
1978-12-31	10
1979-03-31	10.5
1979-06-30	11.5
1979-09-30	11.5
1979-12-31	15
1980-03-31	15
1980-06-30	15
1980-09-30	14
1980-12-31	11.75
1981-03-31	9
1981-06-30	9
1981-09-30	11.25
1981-12-31	12.38
1982-03-31	10.13
1982-06-30	9.5
1982-09-30	7.31
1982-12-31	6.81
1983-03-31	7.5
1983-06-30	6
1983-09-30	6
1983-12-31	5.5
1984-03-31	8.25
1984-06-30	8.25
1984-09-30	9.71
1984-12-31	9.03
1985-03-31	11.52
1985-06-30	12.16
1985-09-30	11.36
1985-12-31	11.07
1986-03-31	12.07
1986-06-30	9.5
1986-09-30	9.2
1986-12-31	10.59
1987-03-31	9.6
1987-06-30	8.77
1987-09-30	9.38
1987-12-31	8.91
1988-03-31	8.49
1988-06-30	7.82
1988-09-30	10.22
1988-12-31	11.65
1989-03-31	12
1989-06-30	12.03
1989-09-30	12.2
1989-12-31	12.58
1990-03-31	13.57
1990-06-30	13.84
1990-09-30	13.84
1990-12-31	12.96
1991-03-31	12.32
1991-06-30	10.77
1991-09-30	9.67
1991-12-31	9.77
1992-03-31	8.52
1992-06-30	8.99
1992-09-30	8.62
1992-12-31	6.5
1993-03-31	5.43
1993-06-30	5.18
1993-09-30	5.07
1993-12-31	4.74
1994-03-31	4.44
1994-06-30	4.37
1994-09-30	4.39
1994-12-31	4.62
1995-03-31	4.95
1995-06-30	5.19
1995-09-30	5.34
1995-12-31	5.07
1996-03-31	4.68
1996-06-30	4.42
1996-09-30	4.29
1996-12-31	4.23
1997-03-31	4.37
1997-06-30	4.62
1997-09-30	5.55
1997-12-31	5.87
1998-03-31	6.01
1998-06-30	6
1998-09-30	6.23
1998-12-31	5
1999-03-31	4.3
1999-06-30	3.9
1999-09-30	3.8
1999-12-31	4
2000-03-31	4.4
2000-06-30	4.5
2000-09-30	4.5
2000-12-31	4.4
2001-03-31	4.3
2001-06-30	3.9
2001-09-30	3.6
2001-12-31	2.9
2002-03-31	2.4
2002-06-30	2.4
2002-09-30	2.4
2002-12-31	2.3
2003-03-31	2.2
2003-06-30	2
2003-09-30	1.8
2003-12-31	1.9
2004-03-31	2.1
2004-06-30	2.3
2004-09-30	2.8
2004-12-31	3
2005-03-31	3
2005-06-30	3
2005-09-30	2.9
2005-12-31	2.7
2006-03-31	2.8
2006-06-30	2.7
2006-09-30	2.8
2006-12-31	3
2007-03-31	3.3
2007-06-30	3.4
2007-09-30	3.6
2007-12-31	3.6