Quarter	Percent, Seasonally Adjusted
1978-01-01	5.4
1978-04-01	5.8
1978-07-01	6.3
1978-10-01	6.7
1979-01-01	7.0
1979-04-01	7.4
1979-07-01	7.9
1979-10-01	8.5
1980-01-01	8.1
1980-04-01	8.7
1980-07-01	9.2
1980-10-01	9.7
1981-01-01	10.2
1981-04-01	10.8
1981-07-01	11.3
1981-10-01	11.8
1982-01-01	12.3
1982-04-01	12.7
1982-07-01	13.2
1982-10-01	13.9
1983-01-01	14.0
1983-04-01	14.1
1983-07-01	14.5
1983-10-01	14.9
1984-01-01	15.8
1984-04-01	16.4
1984-07-01	16.9
1984-10-01	17.6
1985-01-01	17.5
1985-04-01	17.9
1985-07-01	17.9
1985-10-01	17.9
1986-01-01	19.5
1986-04-01	19.3
1986-07-01	19.1
1986-10-01	19.0
1987-01-01	18.9
1987-04-01	18.5
1987-07-01	18.4
1987-10-01	18.1
1988-01-01	18.0
1988-04-01	17.9
1988-07-01	17.5
1988-10-01	16.6
1989-01-01	16.3
1989-04-01	15.6
1989-07-01	15.0
1989-10-01	15.1
1990-01-01	14.7
1990-04-01	14.5
1990-07-01	14.3
1990-10-01	14.2
1991-01-01	14.1
1991-04-01	14.2
1991-07-01	14.7
1991-10-01	14.9
1992-01-01	15.1
1992-04-01	15.8
1992-07-01	16.5
1992-10-01	17.7
1993-01-01	18.9
1993-04-01	19.8
1993-07-01	20.6
1993-10-01	21.1
1994-01-01	21.5
1994-04-01	21.5
1994-07-01	21.3
1994-10-01	21.1
1995-01-01	20.5
1995-04-01	19.9
1995-07-01	20.1
1995-10-01	19.9
1996-01-01	19.7
1996-04-01	19.2
1996-07-01	18.9
1996-10-01	18.5
1997-01-01	18.3
1997-04-01	18.1
1997-07-01	17.6
1997-10-01	17.1
1998-01-01	16.5
1998-04-01	16.2
1998-07-01	15.7
1998-10-01	15.1
1999-01-01	14.1
1999-04-01	13.3
1999-07-01	13
1999-10-01	12.6
2000-01-01	12.2
2000-04-01	11.8
2000-07-01	11.5
2000-10-01	11.2
2001-01-01	10.6
2001-04-01	10.5
2001-07-01	10.4
2001-10-01	10.5
2002-01-01	11.2
2002-04-01	11.3
2002-07-01	11.6
2002-10-01	11.5
2003-01-01	11.6
2003-04-01	11.4
2003-07-01	11.4
2003-10-01	11.3
2004-01-01	11.1
2004-04-01	11.1
2004-07-01	11
2004-10-01	10.5
2005-01-01	9.8
2005-04-01	9.4
2005-07-01	8.7
2005-10-01	8.7
2006-01-01	8.7
2006-04-01	8.6
2006-07-01	8.5
2006-10-01	8.3
2007-01-01	8.1
2007-04-01	8.0
2007-07-01	8.4
2007-10-01	8.6
2008-01-01	9.2
2008-04-01	10.5
2008-07-01	11.8
2008-10-01	14.0
2009-01-01	16.7
2009-04-01	17.9
2009-07-01	18.5
2009-10-01	19.0
2010-01-01	19.4
2010-04-01	20.1
2010-07-01	20.3
2010-10-01	20.5
2011-01-01	20.7
2011-04-01	20.9
2011-07-01	22.0
2011-10-01	23
2012-01-01	23.8