Quarter	Percent
1977-03-31	11.99
1977-06-30	8.19
1977-09-30	7.05
1977-12-31	5.9
1978-03-31	6.81
1978-06-30	9.13
1978-09-30	9.76
1978-12-31	11.73
1979-03-31	12.73
1979-06-30	12.26
1979-09-30	14.14
1979-12-31	15.8
1980-03-31	17.61
1980-06-30	17.09
1980-09-30	16.07
1980-12-31	15.46
1981-03-31	13.26
1981-06-30	12.41
1981-09-30	14.18
1981-12-31	15.54
1982-03-31	14.34
1982-06-30	13.32
1982-09-30	11.4
1982-12-31	9.88
1983-03-31	11.1
1983-06-30	10.11
1983-09-30	9.77
1983-12-31	9.33
1984-03-31	9.23
1984-06-30	9.21
1984-09-30	11.09
1984-12-31	10.09
1985-03-31	12.97
1985-06-30	12.58
1985-09-30	11.66
1985-12-31	11.59
1986-03-31	12.35
1986-06-30	10.11
1986-09-30	9.94
1986-12-31	11.15
1987-03-31	10.59
1987-06-30	9.14
1987-09-30	9.77
1987-12-31	9.2
1988-03-31	9
1988-06-30	8.41
1988-09-30	11.33
1988-12-31	12.49
1989-03-31	13.03
1989-06-30	13.43
1989-09-30	13.9
1989-12-31	15.05
1990-03-31	15.16
1990-06-30	15.09
1990-09-30	14.94
1990-12-31	13.79
1991-03-31	13.18
1991-06-30	11.55
1991-09-30	10.74
1991-12-31	10.53
1992-03-31	10.53
1992-06-30	10.2
1992-09-30	10.14
1992-12-31	7.53
1993-03-31	6.34
1993-06-30	5.92
1993-09-30	5.88
1993-12-31	5.5
1994-03-31	5.2
1994-06-30	5.1
1994-09-30	5.4
1994-12-31	6.1
1995-03-31	6.6
1995-06-30	6.7
1995-09-30	6.8
1995-12-31	6.6
1996-03-31	6.2
1996-06-30	5.9
1996-09-30	5.7
1996-12-31	6.2
1997-03-31	6.2
1997-06-30	6.5
1997-09-30	7.1
1997-12-31	7.4
1998-03-31	7.4
1998-06-30	7.5
1998-09-30	7.6
1998-12-31	6.8
1999-03-31	5.5
1999-06-30	5.2
1999-09-30	5.2
1999-12-31	5.9
2000-03-31	6.1
2000-06-30	6.2
2000-09-30	6.1
2000-12-31	6
2001-03-31	5.6
2001-06-30	5.2
2001-09-30	4.9
2001-12-31	4.1
2002-03-31	4
2002-06-30	4.1
2002-09-30	3.9
2002-12-31	3.9
2003-03-31	3.7
2003-06-30	3.6
2003-09-30	3.5
2003-12-31	3.8
2004-03-31	4.1
2004-06-30	4.5
2004-09-30	4.8
2004-12-31	4.8
2005-03-31	4.8
2005-06-30	4.8
2005-09-30	4.5
2005-12-31	4.5
2006-03-31	4.5
2006-06-30	4.6
2006-09-30	4.8
2006-12-31	5.2
2007-03-31	5.5
2007-06-30	5.7
2007-09-30	6.3
2007-12-31	6.3
2008-03-31	5.7
2008-06-30	5.8
2008-09-30	5.8
2008-12-31	4.6
2009-03-31	2
2009-06-30	1.3
2009-09-30	0.8
2009-12-31	0.5