Quarter	Percent, Seasonally Adjusted
1983-04-01	7.0
1984-04-01	7.3
1985-04-01	7.0
1986-04-01	6.6
1987-04-01	6.6
1988-04-01	6.9
1989-04-01	6.7
1990-04-01	6.3
1991-04-01	6.9
1992-04-01	7.8
1993-04-01	8.6
1994-04-01	8.9
1995-04-01	9.1
1996-04-01	9.7
1997-04-01	9.6
1998-04-01	10.9
1998-07-01	11.1
1998-10-01	11.3
1999-01-01	11.4
1999-04-01	12.0
1999-07-01	12.0
1999-10-01	12.3
2000-01-01	11.6
2000-04-01	11.5
2000-07-01	11.2
2000-10-01	10.6
2001-01-01	10.5
2001-04-01	10.7
2001-07-01	10.6
2001-10-01	10.9
2002-01-01	10.7
2002-04-01	10.3
2002-07-01	10.2
2002-10-01	10.0
2003-01-01	9.7
2003-04-01	9.7
2003-07-01	9.7
2003-10-01	9.9
2004-01-01	10.9
2004-04-01	10.5
2004-07-01	10.4
2004-10-01	10.3
2005-01-01	9.9
2005-04-01	9.9
2005-07-01	10.0
2005-10-01	9.7
2006-01-01	9.3
2006-04-01	9.0
2006-07-01	8.6
2006-10-01	8.6
2007-01-01	8.7
2007-04-01	8.3
2007-07-01	8.2
2007-10-01	8.0
2008-01-01	7.9
2008-04-01	7.5
2008-07-01	7.5
2008-10-01	8.0
2009-01-01	8.9
2009-04-01	9.2
2009-07-01	9.6
2009-10-01	10.2
2010-01-01	11.1
2010-04-01	12.1
2010-07-01	12.9
2010-10-01	14.1
2011-01-01	15.2
2011-04-01	16.8
2011-07-01	18.4
2011-10-01	20.4