Quarter	Percent
1963-06-30	3.3
1963-09-30	4
1963-12-31	3.9
1964-03-31	3.2
1964-06-30	3.8
1964-09-30	3.8
1964-12-31	3.1
1965-03-31	2.4
1965-06-30	2.1
1965-09-30	1.8
1965-12-31	3.2
1966-03-31	3.2
1966-06-30	3.9
1966-09-30	3.2
1966-12-31	2.1
1967-03-31	2.6
1967-06-30	3.7
1967-09-30	4.2
1967-12-31	4
1968-03-31	4.1
1968-06-30	3.4
1968-09-30	3.1
1968-12-31	2.4
1969-03-31	2.5
1969-06-30	2.5
1969-09-30	2.8
1969-12-31	2.3
1970-03-31	2.5
1970-06-30	3.3
1970-09-30	3.8
1970-12-31	3.6
1971-03-31	3.2
1971-06-30	4.3
1971-09-30	4.9
1971-12-31	4.7
1972-03-31	4.8
1972-06-30	5.8
1972-09-30	6.1
1972-12-31	5.1
1973-03-31	5.3
1973-06-30	4.2
1973-09-30	4
1973-12-31	2.7
1974-03-31	2.2
1974-06-30	1.7
1974-09-30	2.7
1974-12-31	3.1
1975-03-31	3
1975-06-30	3.9
1975-09-30	4.2
1975-12-31	4.2
1976-03-31	4.1
1976-06-30	4.7
1976-09-30	4.7
1976-12-31	3.7
1977-03-31	3.2
1977-06-30	3.8
1977-09-30	4.8
1977-12-31	4.8
1978-03-31	4.6
1978-06-30	4.8
1978-09-30	4.4
1978-12-31	4.1
1979-03-31	3.9
1979-06-30	4.3
1979-09-30	4.5
1979-12-31	3.7
1980-03-31	3.2
1980-06-30	3.6
1980-09-30	3.9
1980-12-31	4.2
1981-03-31	4
1981-06-30	4.7
1981-09-30	4.7
1981-12-31	4.2
1982-03-31	4.3
1982-06-30	5.8
1982-09-30	6
1982-12-31	6.1
1983-03-31	5.4
1983-06-30	5.3
1983-09-30	4.8
1983-12-31	4.3
1984-03-31	4.2
1984-06-30	5.2
1984-09-30	5
1984-12-31	4.2
1985-03-31	3.6
1985-06-30	4.3
1985-09-30	4.8
1985-12-31	4.7
1986-03-31	3.7
1986-06-30	5
1986-09-30	5.7
1986-12-31	4.7
1987-03-31	3.8
1987-06-30	4.2
1987-09-30	4.6
1987-12-31	4.4
1988-03-31	4.3
1988-06-30	5.4
1988-09-30	5.8
1988-12-31	4
1989-03-31	3.4
1989-06-30	3.6
1989-09-30	3.8
1989-12-31	3.9
1990-03-31	3.5
1990-06-30	3.5
1990-09-30	3
1990-12-31	2.6
1991-03-31	2.2
1991-06-30	2.5
1991-09-30	2.7
1991-12-31	2.1
1992-03-31	1.7
1992-06-30	2
1992-09-30	2.2
1992-12-31	1.1
1993-03-31	1
1993-06-30	1.6
1993-09-30	1.8
1993-12-31	1.4
1994-03-31	1.4
1994-06-30	1.5
1994-09-30	1.6
1994-12-31	1.4
1995-03-31	1.1
1995-06-30	1.3
1995-09-30	1.2
1995-12-31	1.1
1996-03-31	1
1996-06-30	1.4
1996-09-30	1.2
1996-12-31	1.5
1997-03-31	1.3
1997-06-30	1.6
1997-09-30	1.6
1997-12-31	1.2
1998-03-31	1
1998-06-30	1.5
1998-09-30	1.7
1998-12-31	1.3
1999-03-31	1.1
1999-06-30	2
1999-09-30	2.4
1999-12-31	1.6
2000-03-31	1.5
2000-06-30	2
2000-09-30	1.2
2000-12-31	1.1
2001-03-31	1.2
2001-06-30	2
2001-09-30	2
2001-12-31	1.9
2002-03-31	1.9
2002-06-30	2.8
2002-09-30	3.2
2002-12-31	2.7
2003-03-31	1.1
2003-06-30	2.8
2003-09-30	3.8
2003-12-31	3.1
2004-03-31	1.8
2004-06-30	2.6
2004-09-30	2.4
2004-12-31	2.1
2005-03-31	0.2
2005-06-30	1.2
2005-09-30	2.7
2005-12-31	2
2006-03-31	-0.5
2006-06-30	2.3
2006-09-30	2.5
2006-12-31	1.6
2007-03-31	0.8
2007-06-30	0.4
2007-09-30	1.4
2007-12-31	0.3
2008-03-31	2.1
2008-06-30	0.2
2008-09-30	-2.9
2008-12-31	-4.7
2009-03-31	0.6
2009-06-30	0.9
2009-09-30	0.7
2009-12-31	1.6
2010-03-31	0.2
2010-06-30	0.4
2010-09-30	0.5
2010-12-31	0.3
2011-03-31	0.1
2011-06-30	0.3
2011-09-30	0.4
2011-12-31	0.3
2012-03-31	0.2
2012-06-30	0.2
2012-09-30	0.3
2012-12-31	0.2
2013-03-31	0
2013-06-30	0.2
2013-09-30	0.5
2013-12-31	0.5
2014-03-31	0.5
2014-06-30	0.7
2014-09-30	0.7
2014-12-31	0.5
2015-03-31	0.3