Quarter	Percent
1977-03-31	11.58
1977-06-30	7.55
1977-09-30	6.25
1977-12-31	4.84
1978-03-31	6.86
1978-06-30	10.33
1978-09-30	10.86
1978-12-31	11.23
1979-03-31	13.98
1979-06-30	13.51
1979-09-30	14.79
1979-12-31	15.58
1980-03-31	15.94
1980-06-30	16.09
1980-09-30	15.74
1980-12-31	14.73
1981-03-31	13.45
1981-06-30	10.3
1981-09-30	11.56
1981-12-31	13.74
1982-03-31	13.56
1982-06-30	12.31
1982-09-30	11.7
1982-12-31	10.09
1983-03-31	11.09
1983-06-30	10.19
1983-09-30	9.34
1983-12-31	8.99
1984-03-31	9.02
1984-06-30	8.07
1984-09-30	11
1984-12-31	9.9
1985-03-31	13.26
1985-06-30	12.88
1985-09-30	11.99
1985-12-31	11.51
1986-03-31	12.08
1986-06-30	10.76
1986-09-30	9.7
1986-12-31	10.4
1987-03-31	10.95
1987-06-30	9.2
1987-09-30	9.06
1987-12-31	9.05
1988-03-31	8.24
1988-06-30	7.36
1988-09-30	10.06
1988-12-31	12.05
1989-03-31	12.7
1989-06-30	12.19
1989-09-30	13.8
1989-12-31	14.82
1990-03-31	14.82
1990-06-30	14.78
1990-09-30	14.86
1990-12-31	14.26
1991-03-31	13.78
1991-06-30	11.9
1991-09-30	10.95
1991-12-31	10.53
1992-03-31	10.49
1992-06-30	9.96
1992-09-30	9.81
1992-12-31	7.94
1993-03-31	6.21
1993-06-30	5.71
1993-09-30	5.89
1993-12-31	5.7
1994-03-31	5.2
1994-06-30	4.7
1994-09-30	4.8
1994-12-31	5.2
1995-03-31	5.9
1995-06-30	5.9
1995-09-30	6.6
1995-12-31	6.7
1996-03-31	6.2
1996-06-30	5.9
1996-09-30	5.7
1996-12-31	5.8
1997-03-31	5.9
1997-06-30	6.1
1997-09-30	6.8
1997-12-31	7.1
1998-03-31	7.3
1998-06-30	7.2
1998-09-30	7.4
1998-12-31	6.9
1999-03-31	5.7
1999-06-30	5.1
1999-09-30	4.9
1999-12-31	5.1
2000-03-31	5.6
2000-06-30	5.9
2000-09-30	5.9
2000-12-31	5.9
2001-03-31	5.6
2001-06-30	5.2
2001-09-30	4.9
2001-12-31	4.2
2002-03-31	3.9
2002-06-30	3.7
2002-09-30	3.9
2002-12-31	4
2003-03-31	3.7
2003-06-30	3.5
2003-09-30	3.4
2003-12-31	3.5
2004-03-31	3.8
2004-06-30	4.1
2004-09-30	4.6
2004-12-31	4.7
2005-03-31	4.7
2005-06-30	4.8
2005-09-30	4.6
2005-12-31	4.5
2006-03-31	4.5
2006-06-30	4.5
2006-09-30	4.7
2006-12-31	5
2007-03-31	5.3
2007-06-30	5.4
2007-09-30	5.8
2007-12-31	5.7
2008-03-31	5.4
2008-06-30	5
2008-09-30	5
2008-12-31	3
2009-03-31	0.9
2009-06-30	0.4
2009-09-30	0.4
2009-12-31	0.4