Quarter	Percent
1975-03-31	10.64
1975-06-30	9.63
1975-09-30	10.16
1975-12-31	11.15
1976-03-31	9.23
1976-06-30	10.07
1976-09-30	11.3
1976-12-31	14.69
1977-03-31	12.09
1977-06-30	7.84
1977-09-30	6.78
1977-12-31	5.49
1978-03-31	6.23
1978-06-30	8.4
1978-09-30	9.49
1978-12-31	11.13
1979-03-31	12.61
1979-06-30	12.34
1979-09-30	14.17
1979-12-31	15.59
1980-03-31	17.7
1980-06-30	17.39
1980-09-30	16.44
1980-12-31	15.3
1981-03-31	13.2
1981-06-30	11.75
1981-09-30	13.36
1981-12-31	15.09
1982-03-31	13.76
1982-06-30	12.9
1982-09-30	11.19
1982-12-31	9.69
1983-03-31	10.87
1983-06-30	9.96
1983-09-30	9.47
1983-12-31	9.01
1984-03-31	8.87
1984-06-30	8.74
1984-09-30	10.8
1984-12-31	9.84
1985-03-31	12.76
1985-06-30	12.38
1985-09-30	11.54
1985-12-31	11.33
1986-03-31	12.17
1986-06-30	10.21
1986-09-30	9.82
1986-12-31	10.67
1987-03-31	10.54
1987-06-30	9.07
1987-09-30	9.32
1987-12-31	8.95
1988-03-31	8.48
1988-06-30	7.91
1988-09-30	10.67
1988-12-31	12.04
1989-03-31	12.68
1989-06-30	12.94
1989-09-30	13.67
1989-12-31	14.67
1990-03-31	14.74
1990-06-30	14.66
1990-09-30	14.63
1990-12-31	13.78
1991-03-31	13.13
1991-06-30	11.45
1991-09-30	10.6
1991-12-31	10.26
1992-03-31	10.2
1992-06-30	9.85
1992-09-30	9.66
1992-12-31	7.31
1993-03-31	5.98
1993-06-30	5.67
1993-09-30	5.65
1993-12-31	5.4
1994-03-31	5.01
1994-06-30	4.86
1994-09-30	5.01
1994-12-31	5.55
1995-03-31	6.18
1995-06-30	6.21
1995-09-30	6.57
1995-12-31	6.57
1996-03-31	6.11
1996-06-30	5.84
1996-09-30	5.65
1996-12-31	5.86
1997-03-31	5.94
1997-06-30	6.21
1997-09-30	6.84
1997-12-31	7.13
1998-03-31	7.24
1998-06-30	7.27
1998-09-30	7.38
1998-12-31	6.65
1999-03-31	5.47
1999-06-30	5.07
1999-09-30	4.95
1999-12-31	5.34
2000-03-31	5.84
2000-06-30	5.95
2000-09-30	5.9
2000-12-31	5.85
2001-03-31	5.64
2001-06-30	5.19
2001-09-30	4.88
2001-12-31	4.08
2002-03-31	3.94
2002-06-30	3.91
2002-09-30	3.86
2002-12-31	3.82
2003-03-31	3.73
2003-06-30	3.59
2003-09-30	3.44
2003-12-31	3.7
2004-03-31	3.98
2004-06-30	4.32
2004-09-30	4.69
2004-12-31	4.75
2005-03-31	4.75
2005-06-30	4.78