1901 10.7 27.4 1901-07-30 -12.2 1901-01-10 1902 10.0 25.4 1902-08-07 -17.6 1902-12-15 1903 11.4 28.7 1903-07-20 -11.5 1903-01-23 1904 11.3 28.5 1904-08-07 -6.5 1904-01-12 1905 11.0 28.9 1905-08-05 -11.0 1905-01-01 1906 11.1 26.9 1906-08-04 -8.0 1906-12-31 1907 10.6 27.1 1907-07-02 -12.4 1907-01-22 1908 10.4 27.4 1908-06-20 -7.9 1908-01-03 1909 10.8 26.6 1909-07-26 -8.8 1909-01-25 1910 11.1 27.7 1910-07-22 -2.9 1910-01-24 1911 11.1 26.7 1911-08-22 -9.6 1911-02-07 1912 9.6 26.3 1912-07-29 -12.8 1912-01-15 1913 10.1 25.4 1913-06-05 -10.4 1913-01-15 1914 9.9 25.1 1914-07-07 -10.0 1914-01-25 1915 10.4 26.1 1915-06-13 -7.7 1915-11-28 1916 11.3 25.6 1916-07-04 -2.9 1916-11-18 1917 10.5 28.5 1917-08-02 -14.1 1917-02-09 1918 10.8 28.5 1918-07-18 -6.4 1918-01-10 1919 10.2 25.5 1919-07-08 -8.0 1919-02-09 1920 11.0 25.9 1920-07-09 -4.8 1920-10-30 1921 11.2 29.6 1921-08-12 -6.2 1921-12-13 1922 9.8 30.5 1922-07-11 -9.3 1922-02-12 1923 11.2 27.5 1923-07-15 -10.2 1923-12-28 1924 10.0 27.1 1924-07-05 -8.6 1924-01-24 1925 10.7 24.4 1925-07-23 -13.1 1925-12-08 1926 11.4 24.7 1926-07-14 -9.6 1926-01-12 1927 11.0 28.2 1927-07-09 -15.2 1927-12-21 1928 11.0 30.1 1928-07-27 -11.0 1928-01-03 1929 9.9 28.7 1929-07-24 -19.2 1929-02-10 1930 11.6 27.0 1930-06-27 -4.8 1930-02-10 1931 10.3 30.3 1931-07-15 -6.7 1931-12-19 1932 10.6 27.2 1932-07-08 -9.3 1932-02-12 1933 10.0 29.4 1933-07-29 -9.6 1933-12-19 1934 12.2 28.1 1934-07-22 -7.6 1934-01-27 1935 10.8 28.5 1935-06-27 -11.8 1935-02-12 1936 11.3 29.2 1936-07-28 -7.7 1936-02-11 1937 11.3 26.3 1937-06-11 -9.4 1937-12-28 1938 11.3 28.4 1938-07-02 -14.1 1938-01-05 1939 11.3 28.4 1939-07-16 -10.4 1939-12-29 1940 8.8 25.3 1940-07-08 -14.3 1940-02-17 1941 9.9 26.3 1941-08-19 -8.8 1941-01-30 1942 10.0 26.4 1942-07-10 -20.6 1942-01-24 1943 11.3 28.0 1943-08-22 -11.6 1943-01-11 1944 10.8 26.8 1944-08-31 -8.2 1944-12-27 1945 11.2 29.2 1945-07-28 -10.1 1945-01-29 1946 11.6 29.9 1946-08-19 -9.4 1946-12-20 1947 11.5 30.1 1947-08-05 -14.3 1947-01-07 1948 11.4 29.2 1948-08-10 -7.2 1948-12-22 1949 11.9 28.1 1949-08-02 -5.4 1949-02-02 1950 12.0 32.0 1950-07-05 -11.7 1950-02-04 1951 12.1 27.7 1951-07-12 -5.1 1951-12-24 1952 11.2 29.7 1952-08-15 -4.9 1952-03-07 1953 11.4 26.4 1953-07-18 -7.1 1953-12-19 1954 10.3 26.9 1954-08-15 -15.3 1954-01-27 1955 10.4 26.3 1955-07-03 -7.4 1955-01-06 1956 9.7 26.1 1956-08-07 -15.7 1956-02-09 1957 11.1 30.5 1957-07-08 -8.0 1957-01-22 1958 11.2 28.1 1958-07-16 -6.5 1958-01-25 1959 11.2 28.0 1959-07-12 -5.2 1959-02-13 1960 11.2 27.1 1960-07-20 -8.8 1960-02-02 1961 11.8 29.0 1961-08-10 -8.2 1961-12-16 1962 10.5 28.1 1962-08-15 -7.1 1962-12-28 1963 10.3 28.4 1963-06-28 -13.6 1963-01-18 1964 10.5 27.1 1964-07-22 -12.5 1964-01-21 1965 10.0 26.9 1965-06-26 -6.5 1965-02-07 1966 11.6 25.9 1966-08-15 -9.2 1966-01-21 1967 11.5 27.4 1967-06-27 -9.9 1967-01-11 1968 11.4 29.2 1968-07-09 -10.7 1968-01-11 1969 10.8 27.7 1969-07-27 -10.6 1969-01-12 1970 10.7 25.7 1970-07-24 -7.0 1970-12-27 1971 11.4 27.8 1971-08-07 -7.9 1971-03-05 1972 11.4 27.6 1972-07-16 -8.7 1972-01-17 1973 11.3 26.4 1973-07-17 -9.4 1973-12-03 1974 11.9 28.3 1974-08-04 -3.1 1974-01-14 1975 11.9 25.7 1975-06-23 -4.6 1975-11-26 1976 11.2 28.5 1976-07-19 -7.8 1976-12-31 1977 11.5 26.4 1977-06-14 -5.4 1977-01-01 1978 10.5 24.4 1978-08-07 -5.9 1978-12-07 1979 11.6 27.9 1979-08-02 -8.4 1979-01-02 1980 10.0 27.2 1980-08-05 -11.8 1980-01-14 1981 11.4 27.4 1981-08-02 -6.7 1981-01-10 1982 11.5 26.9 1982-07-21 -9.9 1982-01-11 1983 12.1 28.4 1983-07-28 -6.3 1983-12-13 1984 11.0 27.4 1984-07-13 -4.1 1984-01-12 1985 10.4 27.0 1985-08-16 -12.5 1985-01-08 1986 11.1 28.0 1986-08-04 -7.3 1986-02-08 1987 10.7 28.5 1987-07-19 -16.5 1987-01-12 1988 11.3 28.8 1988-07-24 -5.6 1988-11-24 1989 11.8 27.4 1989-07-08 -5.0 1989-12-11 1990 11.9 27.7 1990-06-30 -8.3 1990-01-08 1991 10.8 28.7 1991-07-13 -8.1 1991-02-01 1992 12.2 30.3 1992-08-20 -7.5 1992-12-31 1993 11.3 28.1 1993-07-04 -7.4 1993-01-02 1994 12.5 30.3 1994-07-31 -4.8 1994-02-16 1995 11.4 27.9 1995-07-22 -7.2 1995-01-18 1996 10.6 27.8 1996-06-10 -9.7 1996-12-28 1997 11.4 28.0 1997-06-29 -7.7 1997-01-01 1998 11.8 30.7 1998-07-23 -8.2 1998-12-26 1999 11.6 28.0 1999-07-06 -8.1 1999-12-25 2000 12.7 29.7 2000-08-20 -6.8 2000-12-24