Quarter	Percent, Seasonally adjusted
1964-06-30	15.7
1964-09-30	15.4
1964-12-31	14.6
1965-03-31	13.7
1965-06-30	11.8
1965-09-30	9.7
1965-12-31	9.8
1966-03-31	10.6
1966-06-30	12.5
1966-09-30	14.1
1966-12-31	12.9
1967-03-31	12.3
1967-06-30	12.2
1967-09-30	13.2
1967-12-31	15.4
1968-03-31	17
1968-06-30	16.6
1968-09-30	15.4
1968-12-31	13.6
1969-03-31	12
1969-06-30	11
1969-09-30	10.6
1969-12-31	10.5
1970-03-31	10.5
1970-06-30	11.4
1970-09-30	12.5
1970-12-31	13.8
1971-03-31	14.6
1971-06-30	15.8
1971-09-30	17
1971-12-31	18.2
1972-03-31	20
1972-06-30	21.8
1972-09-30	23.1
1972-12-31	23.5
1973-03-31	24.2
1973-06-30	22.3
1973-09-30	19.9
1973-12-31	17.2
1974-03-31	13.7
1974-06-30	11
1974-09-30	9.6
1974-12-31	10
1975-03-31	10.9
1975-06-30	13.2
1975-09-30	14.9
1975-12-31	16.3
1976-03-31	17.5
1976-06-30	18.4
1976-09-30	18.9
1976-12-31	18.3
1977-03-31	17.3
1977-06-30	16.3
1977-09-30	16.4
1977-12-31	17.7
1978-03-31	19.2
1978-06-30	20.4
1978-09-30	20
1978-12-31	19.2
1979-03-31	18.4
1979-06-30	17.7
1979-09-30	17.8
1979-12-31	17.5
1980-03-31	16.8
1980-06-30	15.9
1980-09-30	15.3
1980-12-31	15.8
1981-03-31	16.7
1981-06-30	18
1981-09-30	18.8
1981-12-31	18.8
1982-03-31	19.2
1982-06-30	20.4
1982-09-30	22
1982-12-31	24.1
1983-03-31	25.4
1983-06-30	24.8
1983-09-30	23.3
1983-12-31	21.2
1984-03-31	19.9
1984-06-30	19.8
1984-09-30	20
1984-12-31	20
1985-03-31	19.4
1985-06-30	18.4
1985-09-30	18
1985-12-31	18.5
1986-03-31	18.7
1986-06-30	19.5
1986-09-30	20.4
1986-12-31	20.4
1987-03-31	20.5
1987-06-30	19.6
1987-09-30	18.4
1987-12-31	18.1
1988-03-31	18.6
1988-06-30	20
1988-09-30	21.4
1988-12-31	21
1989-03-31	19.9
1989-06-30	17.9
1989-09-30	15.7
1989-12-31	15.6
1990-03-31	15.7
1990-06-30	15.5
1990-09-30	14.7
1990-12-31	13.3
1991-03-31	11.7
1991-06-30	10.6
1991-09-30	10.3
1991-12-31	9.8
1992-03-31	9.3
1992-06-30	8.7
1992-09-30	8.2
1992-12-31	7.2
1993-03-31	6.4
1993-06-30	6
1993-09-30	5.6
1993-12-31	5.9
1994-03-31	6.3
1994-06-30	6.2
1994-09-30	6.1
1994-12-31	6.1
1995-03-31	5.7
1995-06-30	5.4
1995-09-30	5.1
1995-12-31	4.7
1996-03-31	4.7
1996-06-30	4.8
1996-09-30	4.9
1996-12-31	5.2
1997-03-31	5.5
1997-06-30	5.8
1997-09-30	5.9
1997-12-31	5.8
1998-03-31	5.6
1998-06-30	5.3
1998-09-30	5.5
1998-12-31	5.6
1999-03-31	5.7
1999-06-30	6.2
1999-09-30	6.9
1999-12-31	7.3
2000-03-31	7.7
2000-06-30	7.6
2000-09-30	6.4
2000-12-31	5.9
2001-03-31	5.7
2001-06-30	5.7
2001-09-30	6.6
2001-12-31	7.3
2002-03-31	8
2002-06-30	9
2002-09-30	10.2
2002-12-31	10.9
2003-03-31	10.5
2003-06-30	10.3
2003-09-30	10.7
2003-12-31	11.2
2004-03-31	11.9
2004-06-30	11.6
2004-09-30	10.2
2004-12-31	9.3
2005-03-31	7.3
2005-06-30	6
2005-09-30	6.2
2005-12-31	6.4
2006-03-31	5.4
2006-06-30	6.5
2006-09-30	6.4
2006-12-31	6.3
2007-03-31	7.2
2007-06-30	5.3
2007-09-30	4.4
2007-12-31	3.2
2008-03-31	4.1
2008-06-30	4.1
2008-09-30	-0.3
2008-12-31	-5.3
2009-03-31	-6.7
2009-06-30	-6.2
2009-09-30	-2.5
2009-12-31	3.9
2010-03-31	4.3
2010-06-30	3.9
2010-09-30	3.5
2010-12-31	1.4
2011-03-31	1.3
2011-06-30	1.1
2011-09-30	1.1
2011-12-31	1.1
2012-03-31	1.2
2012-06-30	1.2
2012-09-30	1.1
2012-12-31	1
2013-03-31	0.8
2013-06-30	0.8
2013-09-30	1
2013-12-31	1.2
2014-03-31	1.7
2014-06-30	2.2
2014-09-30	2.4
2014-12-31	2.4
2015-03-31	2.2