Quarterly Percent
1977-03-31 9.4
1977-06-30 8.8
1977-09-30 8.1
1977-12-31 7.7
1978-03-31 6.9
1978-06-30 6.9
1978-09-30 8.4
1978-12-31 8.9
1979-03-31 10
1979-06-30 10
1979-09-30 10.6
1979-12-31 10.9
1980-03-31 13.1
1980-06-30 13.1
1980-09-30 13.1
1980-12-31 13.1
1981-03-31 11.6
1981-06-30 10.6
1981-09-30 10.6
1981-12-31 11.7
1982-03-31 12.2
1982-06-30 10.9
1982-09-30 10.5
1982-12-31 9.1
1983-03-31 7.8
1983-06-30 7.8
1983-09-30 9.1
1983-12-31 9.1
1984-03-31 9.7
1984-06-30 8.4
1984-09-30 9.8
1984-12-31 10.2
1985-03-31 10.3
1985-06-30 12.3
1985-09-30 11.9
1985-12-31 11.8
1986-03-31 12.5
1986-06-30 10.9
1986-09-30 10.7
1986-12-31 11.4
1987-03-31 12.1
1987-06-30 11
1987-09-30 10.5
1987-12-31 10
1988-03-31 9.1
1988-06-30 8.6
1988-09-30 9.4
1988-12-31 11.2
1989-03-31 11.6
1989-06-30 11.6
1989-09-30 11.6
1989-12-31 12.4
1990-03-31 13
1990-06-30 13.6
1990-09-30 13.7
1990-12-31 13.5
1991-03-31 13.1
1991-06-30 11.5
1991-09-30 10.2
1991-12-31 9.5
1992-03-31 9.2
1992-06-30 8.9
1992-09-30 8.4
1992-12-31 6.6
1993-03-31 5.3
1993-06-30 5
1993-09-30 4.9
1993-12-31 4.8
1994-03-31 4.4
1994-06-30 4.4
1994-09-30 4.4
1994-12-31 4.6
1995-03-31 4.8
1995-06-30 4.9
1995-09-30 4.8
1995-12-31 4.2
1996-03-31 3.7
1996-06-30 3.4
1996-09-30 3.2
1996-12-31 3
1997-03-31 3.2
1997-06-30 3.3
1997-09-30 3.9
1997-12-31 4.2
1998-03-31 3.9
1998-06-30 4
1998-09-30 4.1
1998-12-31 4.3
1999-03-31 3.4
1999-06-30 3
1999-09-30 2.9
1999-12-31 3
2000-03-31 3.2
2000-06-30 3.4
2000-09-30 3.4
2000-12-31 3.4
2001-03-31 3.3
2001-06-30 3
2001-09-30 2.7
2001-12-31 2.1
2002-03-31 1.8
2002-06-30 1.8
2002-09-30 1.8
2002-12-31 1.8
2003-03-31 1.7
2003-06-30 1.5
2003-09-30 1.4
2003-12-31 1.4
2004-03-31 1.6
2004-06-30 1.8
2004-09-30 2.2
2004-12-31 2.3
2005-03-31 2.3
2005-06-30 2.3
2005-09-30 2.2
2005-12-31 2.1
2006-03-31 2
2006-06-30 2
2006-09-30 2
2006-12-31 2.2
2007-03-31 2.6
2007-06-30 2.7
2007-09-30 3.1
2007-12-31 3.2