1964-01-01 38.2 1964-02-01 38.5 1964-03-01 38.5 1964-04-01 38.6 1964-05-01 38.6 1964-06-01 38.6 1964-07-01 38.5 1964-08-01 38.5 1964-09-01 38.5 1964-10-01 38.5 1964-11-01 38.6 1964-12-01 38.7 1965-01-01 38.7 1965-02-01 38.7 1965-03-01 38.7 1965-04-01 38.7 1965-05-01 38.8 1965-06-01 38.6 1965-07-01 38.6 1965-08-01 38.5 1965-09-01 38.6 1965-10-01 38.5 1965-11-01 38.6 1965-12-01 38.6 1966-01-01 38.6 1966-02-01 38.7 1966-03-01 38.7 1966-04-01 38.7 1966-05-01 38.5 1966-06-01 38.5 1966-07-01 38.4 1966-08-01 38.4 1966-09-01 38.3 1966-10-01 38.4 1966-11-01 38.3 1966-12-01 38.2 1967-01-01 38.3 1967-02-01 37.9 1967-03-01 37.9 1967-04-01 37.8 1967-05-01 37.8 1967-06-01 37.8 1967-07-01 37.8 1967-08-01 37.8 1967-09-01 37.8 1967-10-01 37.8 1967-11-01 37.9 1967-12-01 37.7 1968-01-01 37.6 1968-02-01 37.8 1968-03-01 37.7 1968-04-01 37.6 1968-05-01 37.7 1968-06-01 37.8 1968-07-01 37.7 1968-08-01 37.7 1968-09-01 37.7 1968-10-01 37.7 1968-11-01 37.5 1968-12-01 37.5 1969-01-01 37.7 1969-02-01 37.5 1969-03-01 37.6 1969-04-01 37.7 1969-05-01 37.6 1969-06-01 37.5 1969-07-01 37.5 1969-08-01 37.5 1969-09-01 37.5 1969-10-01 37.4 1969-11-01 37.5 1969-12-01 37.5 1970-01-01 37.3 1970-02-01 37.3 1970-03-01 37.2 1970-04-01 37.0 1970-05-01 37.0 1970-06-01 36.9 1970-07-01 37.0 1970-08-01 37.0 1970-09-01 36.8 1970-10-01 36.8 1970-11-01 36.7 1970-12-01 36.8 1971-01-01 36.8 1971-02-01 36.7 1971-03-01 36.7 1971-04-01 36.8 1971-05-01 36.7 1971-06-01 36.8 1971-07-01 36.7 1971-08-01 36.7 1971-09-01 36.7 1971-10-01 36.8 1971-11-01 36.9 1971-12-01 36.9 1972-01-01 36.9 1972-02-01 36.9 1972-03-01 36.9 1972-04-01 36.9 1972-05-01 36.8 1972-06-01 36.9 1972-07-01 36.8 1972-08-01 36.8 1972-09-01 36.9 1972-10-01 37.0 1972-11-01 36.9 1972-12-01 36.8 1973-01-01 36.8 1973-02-01 36.9 1973-03-01 37.0 1973-04-01 36.9 1973-05-01 36.9 1973-06-01 36.9 1973-07-01 36.9 1973-08-01 36.9 1973-09-01 36.8 1973-10-01 36.7 1973-11-01 36.9 1973-12-01 36.7 1974-01-01 36.6 1974-02-01 36.6 1974-03-01 36.6 1974-04-01 36.4 1974-05-01 36.5 1974-06-01 36.5 1974-07-01 36.5 1974-08-01 36.5 1974-09-01 36.4 1974-10-01 36.3 1974-11-01 36.1 1974-12-01 36.1 1975-01-01 36.1 1975-02-01 35.9 1975-03-01 35.7 1975-04-01 35.8 1975-05-01 35.9 1975-06-01 35.9 1975-07-01 35.9 1975-08-01 36.1 1975-09-01 36.1 1975-10-01 36.1 1975-11-01 36.1 1975-12-01 36.2 1976-01-01 36.3 1976-02-01 36.3 1976-03-01 36.0 1976-04-01 36.0 1976-05-01 36.1 1976-06-01 36.1 1976-07-01 36.1 1976-08-01 36.0 1976-09-01 36.0 1976-10-01 35.9 1976-11-01 35.9 1976-12-01 35.9 1977-01-01 35.6 1977-02-01 36.0 1977-03-01 35.9 1977-04-01 36.0 1977-05-01 36.0 1977-06-01 36.0 1977-07-01 35.9 1977-08-01 35.9 1977-09-01 35.9 1977-10-01 36.0 1977-11-01 35.9 1977-12-01 35.8 1978-01-01 35.3 1978-02-01 35.6 1978-03-01 35.8 1978-04-01 35.8 1978-05-01 35.8 1978-06-01 35.9 1978-07-01 35.9 1978-08-01 35.8 1978-09-01 35.8 1978-10-01 35.8 1978-11-01 35.7 1978-12-01 35.7 1979-01-01 35.6 1979-02-01 35.7 1979-03-01 35.8 1979-04-01 35.3 1979-05-01 35.6 1979-06-01 35.6 1979-07-01 35.6 1979-08-01 35.6 1979-09-01 35.6 1979-10-01 35.6 1979-11-01 35.6 1979-12-01 35.5 1980-01-01 35.4 1980-02-01 35.4 1980-03-01 35.3 1980-04-01 35.2 1980-05-01 35.1 1980-06-01 35.0 1980-07-01 34.9 1980-08-01 35.1 1980-09-01 35.1 1980-10-01 35.2 1980-11-01 35.3 1980-12-01 35.3 1981-01-01 35.4 1981-02-01 35.2 1981-03-01 35.3 1981-04-01 35.3 1981-05-01 35.3 1981-06-01 35.2 1981-07-01 35.2 1981-08-01 35.2 1981-09-01 35.0 1981-10-01 35.1 1981-11-01 35.1 1981-12-01 34.9 1982-01-01 34.1 1982-02-01 35.1 1982-03-01 34.9 1982-04-01 34.8 1982-05-01 34.8 1982-06-01 34.8 1982-07-01 34.8 1982-08-01 34.7 1982-09-01 34.8 1982-10-01 34.6 1982-11-01 34.6 1982-12-01 34.7 1983-01-01 34.8 1983-02-01 34.5 1983-03-01 34.7 1983-04-01 34.8 1983-05-01 34.9 1983-06-01 34.9 1983-07-01 34.9 1983-08-01 34.9 1983-09-01 35.0 1983-10-01 35.2 1983-11-01 35.1 1983-12-01 35.1 1984-01-01 35.1 1984-02-01 35.3 1984-03-01 35.1 1984-04-01 35.2 1984-05-01 35.1 1984-06-01 35.1 1984-07-01 35.1 1984-08-01 35.0 1984-09-01 35.1 1984-10-01 34.9 1984-11-01 35.0 1984-12-01 35.1 1985-01-01 34.9 1985-02-01 34.8 1985-03-01 34.9 1985-04-01 34.9 1985-05-01 34.9 1985-06-01 34.9 1985-07-01 34.8 1985-08-01 34.8 1985-09-01 34.8 1985-10-01 34.8 1985-11-01 34.8 1985-12-01 34.9 1986-01-01 35.0 1986-02-01 34.8 1986-03-01 34.8 1986-04-01 34.7 1986-05-01 34.8 1986-06-01 34.7 1986-07-01 34.6 1986-08-01 34.7 1986-09-01 34.6 1986-10-01 34.6 1986-11-01 34.7 1986-12-01 34.6 1987-01-01 34.7 1987-02-01 34.9 1987-03-01 34.7 1987-04-01 34.7 1987-05-01 34.8 1987-06-01 34.7 1987-07-01 34.7 1987-08-01 34.9 1987-09-01 34.7 1987-10-01 34.8 1987-11-01 34.8 1987-12-01 34.6 1988-01-01 34.6 1988-02-01 34.7 1988-03-01 34.5 1988-04-01 34.6 1988-05-01 34.6 1988-06-01 34.6 1988-07-01 34.7 1988-08-01 34.5 1988-09-01 34.5 1988-10-01 34.7 1988-11-01 34.5 1988-12-01 34.6 1989-01-01 34.7 1989-02-01 34.5 1989-03-01 34.5 1989-04-01 34.6 1989-05-01 34.4 1989-06-01 34.4 1989-07-01 34.5 1989-08-01 34.5 1989-09-01 34.4 1989-10-01 34.6 1989-11-01 34.4 1989-12-01 34.3 1990-01-01 34.4 1990-02-01 34.3 1990-03-01 34.4 1990-04-01 34.3 1990-05-01 34.3 1990-06-01 34.4 1990-07-01 34.3 1990-08-01 34.2 1990-09-01 34.2 1990-10-01 34.1 1990-11-01 34.2 1990-12-01 34.2 1991-01-01 34.1 1991-02-01 34.1 1991-03-01 34.0 1991-04-01 34.0 1991-05-01 34.0 1991-06-01 34.1 1991-07-01 34.1 1991-08-01 34.1 1991-09-01 34.1 1991-10-01 34.2 1991-11-01 34.1 1991-12-01 34.1 1992-01-01 34.1 1992-02-01 34.1 1992-03-01 34.1 1992-04-01 34.3 1992-05-01 34.2 1992-06-01 34.1 1992-07-01 34.2 1992-08-01 34.2 1992-09-01 34.3 1992-10-01 34.2 1992-11-01 34.2 1992-12-01 34.2 1993-01-01 34.3 1993-02-01 34.3 1993-03-01 34.1 1993-04-01 34.4 1993-05-01 34.3 1993-06-01 34.3 1993-07-01 34.4 1993-08-01 34.3 1993-09-01 34.4 1993-10-01 34.4 1993-11-01 34.4 1993-12-01 34.4 1994-01-01 34.4 1994-02-01 34.2 1994-03-01 34.5 1994-04-01 34.5 1994-05-01 34.5 1994-06-01 34.5 1994-07-01 34.6 1994-08-01 34.5 1994-09-01 34.4 1994-10-01 34.5 1994-11-01 34.5 1994-12-01 34.5 1995-01-01 34.5 1995-02-01 34.4 1995-03-01 34.4 1995-04-01 34.3 1995-05-01 34.2 1995-06-01 34.3 1995-07-01 34.3 1995-08-01 34.3 1995-09-01 34.3 1995-10-01 34.3 1995-11-01 34.3 1995-12-01 34.2 1996-01-01 33.8 1996-02-01 34.3 1996-03-01 34.3 1996-04-01 34.2 1996-05-01 34.3 1996-06-01 34.4 1996-07-01 34.3 1996-08-01 34.3 1996-09-01 34.4 1996-10-01 34.4 1996-11-01 34.4 1996-12-01 34.4 1997-01-01 34.3 1997-02-01 34.5 1997-03-01 34.5 1997-04-01 34.6 1997-05-01 34.5 1997-06-01 34.4 1997-07-01 34.5 1997-08-01 34.6 1997-09-01 34.6 1997-10-01 34.5 1997-11-01 34.6 1997-12-01 34.6 1998-01-01 34.6 1998-02-01 34.6 1998-03-01 34.5 1998-04-01 34.5 1998-05-01 34.5 1998-06-01 34.4 1998-07-01 34.5 1998-08-01 34.5 1998-09-01 34.4 1998-10-01 34.5 1998-11-01 34.5 1998-12-01 34.5 1999-01-01 34.4 1999-02-01 34.4 1999-03-01 34.3 1999-04-01 34.4 1999-05-01 34.4 1999-06-01 34.4 1999-07-01 34.4 1999-08-01 34.4 1999-09-01 34.4 1999-10-01 34.4 1999-11-01 34.4 1999-12-01 34.4 2000-01-01 34.4 2000-02-01 34.4 2000-03-01 34.3 2000-04-01 34.4 2000-05-01 34.3 2000-06-01 34.3 2000-07-01 34.3 2000-08-01 34.2 2000-09-01 34.2 2000-10-01 34.3 2000-11-01 34.2 2000-12-01 34.0 2001-01-01 34.2 2001-02-01 34.0 2001-03-01 34.1 2001-04-01 34.0 2001-05-01 34.0 2001-06-01 34.0 2001-07-01 34.0 2001-08-01 33.9 2001-09-01 33.8 2001-10-01 33.7 2001-11-01 33.8 2001-12-01 33.8 2002-01-01 33.8 2002-02-01 33.8 2002-03-01 33.9 2002-04-01 33.9 2002-05-01 33.9 2002-06-01 33.9 2002-07-01 33.8 2002-08-01 33.9 2002-09-01 33.9 2002-10-01 33.8 2002-11-01 33.8 2002-12-01 33.8 2003-01-01 33.8 2003-02-01 33.7 2003-03-01 33.8 2003-04-01 33.6 2003-05-01 33.7 2003-06-01 33.6 2003-07-01 33.6 2003-08-01 33.6 2003-09-01 33.6 2003-10-01 33.7 2003-11-01 33.8 2003-12-01 33.6 2004-01-01 33.7 2004-02-01 33.8 2004-03-01 33.7 2004-04-01 33.7 2004-05-01 33.8 2004-06-01 33.6 2004-07-01 33.7 2004-08-01 33.7 2004-09-01 33.8 2004-10-01 33.7 2004-11-01 33.7 2004-12-01 33.8 2005-01-01 33.7 2005-02-01 33.7 2005-03-01 33.7 2005-04-01 33.8 2005-05-01 33.7 2005-06-01 33.7 2005-07-01 33.8 2005-08-01 33.7 2005-09-01 33.8 2005-10-01 33.8 2005-11-01 33.8 2005-12-01 33.8 2006-01-01 33.8 2006-02-01 33.8 2006-03-01 33.8