Quarter	Percent
1977-03-31	5.76
1977-06-30	2.95
1977-09-30	2.64
1977-12-31	2.09
1978-03-31	2.09
1978-06-30	2.89
1978-09-30	4.36
1978-12-31	5.14
1979-03-31	6.92
1979-06-30	6.65
1979-09-30	8.05
1979-12-31	8.87
1980-03-31	10.5
1980-06-30	10.5
1980-09-30	10.03
1980-12-31	9.22
1981-03-31	8.05
1981-06-30	6.3
1981-09-30	6.3
1981-12-31	8.87
1982-03-31	8.17
1982-06-30	7.18
1982-09-30	6.07
1982-12-31	4.73
1983-03-31	5.6
1983-06-30	4.9
1983-09-30	4.2
1983-12-31	3.97
1984-03-31	5.47
1984-06-30	5.6
1984-09-30	7.76
1984-12-31	7.12
1985-03-31	10.76
1985-06-30	10.9
1985-09-30	9.75
1985-12-31	9.14
1986-03-31	9.71
1986-06-30	7.79
1986-09-30	7.3
1986-12-31	7.99
1987-03-31	7.97
1987-06-30	6.39
1987-09-30	6.45
1987-12-31	5.99
1988-03-31	5.33
1988-06-30	4.7
1988-09-30	6.85
1988-12-31	8.05
1989-03-31	10.19
1989-06-30	10.56
1989-09-30	10.6
1989-12-31	11.08
1990-03-31	11.31
1990-06-30	11.46
1990-09-30	11.38
1990-12-31	10.43
1991-03-31	9.93
1991-06-30	8.28
1991-09-30	7.57
1991-12-31	7.21
1992-03-31	6.99
1992-06-30	6.29
1992-09-30	5.86
1992-12-31	3.75
1993-03-31	2.6
1993-06-30	2.23
1993-09-30	3.05
1993-12-31	3.2
1994-03-31	2.94
1994-06-30	2.86
1994-09-30	2.85
1994-12-31	3.13
1995-03-31	3.33
1995-06-30	3.46
1995-09-30	3.45
1995-12-31	3.17
1996-03-31	2.67
1996-06-30	2.43
1996-09-30	2.28
1996-12-31	2.22
1997-03-31	2.41
1997-06-30	2.52
1997-09-30	3.49
1997-12-31	3.76
1998-03-31	3.74
1998-06-30	3.73
1998-09-30	3.96
1998-12-31	2.4
1999-03-31	2.2
1999-06-30	1.9
1999-09-30	1.8
1999-12-31	2
2000-03-31	2.3
2000-06-30	2.4
2000-09-30	2.4
2000-12-31	2.3
2001-03-31	2.2
2001-06-30	1.8
2001-09-30	1.5
2001-12-31	1.3
2002-03-31	1
2002-06-30	1.1
2002-09-30	1.1
2002-12-31	1.1
2003-03-31	1.1
2003-06-30	1
2003-09-30	0.9
2003-12-31	0.9
2004-03-31	1.1
2004-06-30	1.4
2004-09-30	1.8
2004-12-31	2.1
2005-03-31	2.2
2005-06-30	2.2
2005-09-30	2
2005-12-31	1.8
2006-03-31	1.8
2006-06-30	1.8
2006-09-30	1.9
2006-12-31	2.1
2007-03-31	2.4
2007-06-30	2.5
2007-09-30	2.8
2007-12-31	2.9