YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC D-J-F M-A-M J-J-A S-O-N metANN 1910 25.3 24.7 22.6 19.5 13.8 12.1 10.4 11.3 14.2 13.8 19.1 21.9 24.4 18.6 11.3 15.7 17.51 1911 25.3 23.8 20.7 17.7 12.6 10.0 10.6 10.5 12.6 16.6 21.3 22.5 23.7 17.0 10.4 16.8 16.97 1912 25.6 26.0 23.9 19.0 14.8 11.3 10.9 12.1 12.5 16.8 19.7 24.5 24.7 19.2 11.4 16.3 17.93 1913 24.2 24.8 22.3 19.0 13.5 12.4 10.2 11.3 13.7 15.7 21.0 22.9 24.5 18.3 11.3 16.8 17.72 1914 26.3 24.6 22.7 17.1 13.1 11.4 9.9 13.2 16.0 20.2 21.0 24.9 24.6 17.6 11.5 19.1 18.20 1915 25.8 25.5 21.7 19.2 15.0 13.5 11.6 12.0 12.8 16.5 22.0 25.5 25.4 18.6 12.4 17.1 18.38 1916 23.9 24.8 23.0 17.1 14.7 11.0 9.6 11.1 14.6 15.2 20.5 22.9 24.7 18.3 10.6 16.8 17.58 1917 24.7 22.9 20.1 17.0 12.6 11.6 11.4 10.8 13.0 15.4 19.4 21.6 23.5 16.6 11.3 15.9 16.82 1918 26.1 24.2 21.3 20.5 14.7 13.1 10.9 11.7 14.9 15.8 22.3 24.2 24.0 18.8 11.9 17.7 18.09 1919 25.3 25.2 24.7 17.8 13.3 11.9 12.4 11.2 11.8 14.9 20.5 23.7 24.9 18.6 11.8 15.7 17.77 1920 26.2 24.4 22.9 17.5 14.2 11.9 9.9 10.8 13.8 17.0 22.0 23.4 24.8 18.2 10.9 17.6 17.86 1921 25.6 28.6 24.2 18.5 15.6 12.9 12.6 11.7 12.6 16.0 19.6 24.3 25.9 19.4 12.4 16.1 18.44 1922 24.3 24.3 23.6 18.6 13.2 11.5 9.9 12.2 13.5 17.0 21.2 21.2 24.3 18.5 11.2 17.2 17.80 1923 24.7 26.2 24.2 20.1 15.4 12.0 10.7 11.8 12.6 16.3 21.4 22.7 24.0 19.9 11.5 16.8 18.05 1924 23.8 23.9 20.9 20.0 14.6 11.7 11.1 11.0 13.7 15.4 20.1 24.3 23.5 18.5 11.3 16.4 17.41 1925 23.0 22.6 22.2 18.7 15.0 12.8 9.8 10.7 13.9 15.8 23.1 24.5 23.3 18.6 11.1 17.6 17.66 1926 27.0 24.8 21.2 17.8 13.7 11.7 11.2 11.2 14.1 17.3 22.3 22.9 25.4 17.6 11.4 17.9 18.07 1927 23.5 23.6 20.5 20.0 13.6 11.3 10.5 12.3 14.5 17.3 22.2 25.2 23.3 18.0 11.4 18.0 17.68 1928 24.6 24.1 22.3 19.6 14.5 12.5 11.2 12.6 14.1 15.6 22.0 24.5 24.6 18.8 12.1 17.2 18.19 1929 24.4 25.3 20.6 18.0 13.8 11.3 10.4 11.3 13.8 17.2 20.1 24.0 24.7 17.5 11.0 17.0 17.56 1930 26.0 25.6 24.6 18.6 16.4 14.3 11.4 12.3 14.7 17.1 21.0 24.0 25.2 19.9 12.7 17.6 18.83 1931 25.5 23.6 23.2 18.5 12.3 9.3 11.8 11.9 13.2 16.9 19.4 26.0 24.4 18.0 11.0 16.5 17.47 1932 27.8 25.7 21.6 18.2 15.7 11.7 11.6 10.8 14.0 15.7 20.7 23.6 26.5 18.5 11.4 16.8 18.29 1933 24.6 27.5 22.7 19.4 14.7 13.5 10.2 11.5 14.2 16.6 21.0 24.7 25.2 18.9 11.7 17.3 18.29 1934 27.9 27.4 23.5 17.1 16.5 12.0 10.7 12.0 14.4 16.2 18.6 23.4 26.7 19.0 11.6 16.4 18.42 1935 25.4 24.2 22.0 18.5 15.8 12.1 11.4 11.7 13.5 15.5 20.6 23.0 24.3 18.8 11.7 16.5 17.84 1936 25.1 24.7 24.6 18.3 14.0 11.4 10.5 12.5 14.9 16.9 22.3 24.2 24.3 19.0 11.5 18.0 18.18 1937 24.2 25.6 22.5 20.0 14.8 11.2 9.5 10.1 12.6 17.3 20.5 22.6 24.7 19.1 10.3 16.8 17.71 1938 25.2 23.2 23.5 20.2 15.5 11.5 11.7 12.9 999.9 999.9 23.7 23.8 23.7 19.7 12.0 999.9 18.13 1939 24.9 24.8 22.9 19.0 14.4 11.9 11.3 11.8 14.2 17.2 19.8 24.4 24.5 18.8 11.7 17.1 18.00 1940 24.5 26.2 23.7 17.7 14.7 14.2 11.7 12.6 14.9 17.8 20.9 22.7 25.0 18.7 12.8 17.9 18.61 1941 25.4 25.2 21.7 18.1 14.8 13.6 12.3 12.9 13.3 16.6 21.1 24.7 24.4 18.2 12.9 17.0 18.14 1942 24.7 24.2 21.4 18.3 14.3 11.7 9.8 11.9 13.3 16.0 20.7 22.9 24.5 18.0 11.1 16.7 17.58 1943 23.7 23.4 22.5 17.1 13.6 12.1 9.6 10.6 13.1 16.2 21.0 22.7 23.3 17.7 10.8 16.8 17.15 1944 26.2 25.5 22.1 17.7 12.9 12.0 11.2 12.1 13.9 18.6 21.6 20.9 24.8 17.6 11.8 18.0 18.04 1945 24.6 25.2 21.9 21.6 15.9 13.3 11.0 12.5 12.8 16.6 20.6 23.5 23.6 19.8 12.3 16.7 18.08 1946 24.3 22.7 21.1 19.3 15.0 11.5 11.9 10.9 15.0 17.6 18.5 23.5 23.5 18.5 11.4 17.0 17.61 1947 24.6 25.7 22.7 18.4 13.9 13.9 10.9 11.0 13.1 15.4 19.4 22.5 24.6 18.3 11.9 16.0 17.71 1948 26.0 25.8 24.7 16.8 14.4 11.8 11.7 12.8 13.9 16.8 19.4 22.0 24.8 18.6 12.1 16.7 18.05 1949 25.7 24.4 21.6 20.2 14.1 13.1 12.7 13.6 13.6 15.9 19.8 24.8 24.0 18.6 13.1 16.4 18.06 1950 25.6 24.5 24.1 20.5 15.5 11.7 11.3 11.9 13.5 15.8 18.9 22.8 25.0 20.0 11.6 16.1 18.18 1951 24.8 24.7 23.5 17.7 13.5 12.3 10.6 10.1 14.8 17.2 20.5 22.6 24.1 18.2 11.0 17.5 17.71 1952 25.8 25.0 22.6 18.9 13.9 13.3 10.0 11.6 13.2 15.8 19.4 20.3 24.5 18.5 11.6 16.1 17.68 1953 25.7 24.4 24.4 18.6 14.6 11.9 10.8 10.5 13.3 16.0 19.0 23.1 23.5 19.2 11.1 16.1 17.46 1954 26.4 24.8 23.0 16.7 13.8 10.8 11.2 11.2 14.1 17.7 19.1 23.9 24.8 17.8 11.1 17.0 17.66 1955 25.4 25.5 23.0 17.6 13.6 10.4 10.3 11.9 13.2 14.4 19.6 22.1 24.9 18.1 10.9 15.7 17.40 1956 27.3 26.0 23.8 16.6 13.5 10.3 10.8 9.6 13.3 15.4 19.7 22.8 25.1 18.0 10.2 16.1 17.37 1957 25.9 24.4 22.3 18.4 15.1 13.6 9.9 12.1 13.6 18.4 22.6 24.9 24.4 18.6 11.9 18.2 18.26 1958 27.7 26.0 23.5 19.6 16.0 12.4 11.1 11.0 12.5 15.6 20.9 25.3 26.2 19.7 11.5 16.3 18.43 1959 25.8 25.2 25.2 19.8 16.9 13.7 12.7 12.9 13.9 999.9 20.7 21.6 25.4 20.6 13.1 17.2 19.08 1960 23.6 25.6 21.3 17.0 12.8 11.4 10.6 10.7 11.9 17.9 20.4 23.4 23.6 17.0 10.9 16.7 17.07 1961 27.3 25.9 24.1 16.7 15.2 12.5 10.5 12.2 15.4 18.5 21.3 24.5 25.5 18.7 11.7 18.4 18.58 1962 27.4 26.1 22.1 20.4 16.4 13.9 10.5 12.7 13.5 15.5 20.8 24.8 26.0 19.6 12.4 16.6 18.65 1963 25.3 24.6 23.7 18.7 15.2 12.3 11.7 12.1 14.6 18.4 21.5 24.5 24.9 19.2 12.0 18.2 18.58 1964 25.5 24.4 23.6 17.5 13.9 14.1 12.2 11.8 12.8 14.3 20.3 22.5 24.8 18.3 12.7 15.8 17.91 1965 26.3 26.2 23.2 20.7 14.2 12.9 11.4 11.3 13.5 17.9 19.2 24.4 25.0 19.4 11.9 16.9 18.28 1966 25.8 24.4 23.4 17.9 14.3 11.3 11.0 10.8 12.3 16.0 21.8 23.2 24.9 18.5 11.0 16.7 17.78 1967 25.2 25.9 21.9 20.6 15.3 13.7 10.7 10.9 13.7 19.2 21.1 23.5 24.8 19.3 11.8 18.0 18.45 1968 25.5 23.9 20.1 16.6 999.9 12.2 11.1 9.9 12.3 15.6 19.5 23.1 24.3 16.3 11.1 15.8 16.87 1969 25.1 25.2 21.8 18.8 14.3 12.5 10.5 11.5 12.8 19.5 22.2 23.5 24.5 18.3 11.5 18.2 18.11 1970 999.9 25.7 23.8 17.0 13.9 12.6 11.4 11.6 13.1 17.4 20.2 24.9 25.0 18.2 11.9 16.9 17.99 1971 25.8 24.4 22.5 17.9 13.7 11.7 11.0 11.1 13.1 15.2 17.8 22.4 25.0 18.0 11.3 15.4 17.43 1972 25.6 27.2 23.6 19.1 16.8 12.6 10.8 11.1 13.8 17.3 22.4 27.1 25.1 19.8 11.5 17.8 18.56 1973 25.5 24.9 22.4 18.6 15.3 11.1 11.8 10.9 12.4 15.9 20.5 23.6 25.8 18.8 11.3 16.3 18.03 1974 26.7 24.2 24.1 17.1 13.7 11.9 11.5 11.9 14.0 15.6 19.7 24.5 24.8 18.3 11.8 16.4 17.83 1975 24.4 27.1 22.0 18.2 14.2 12.1 11.5 10.6 13.0 16.0 20.5 24.3 25.3 18.1 11.4 16.5 17.84 1976 25.0 27.0 24.3 19.6 15.9 11.8 12.1 11.8 14.2 17.5 18.5 24.5 25.4 19.9 11.9 16.7 18.50 1977 26.0 26.4 999.9 19.3 13.8 12.4 13.0 12.7 13.3 17.7 21.2 26.8 25.6 18.6 12.7 17.4 18.59 1978 26.8 26.0 24.0 21.6 14.6 11.8 11.2 11.2 12.0 17.2 21.4 23.4 26.5 20.1 11.4 16.9 18.72 1979 25.8 25.2 23.5 18.2 13.3 12.6 11.2 10.5 12.7 18.1 21.0 24.7 24.8 18.3 11.4 17.3 17.96 1980 26.8 24.8 24.3 17.4 15.7 11.7 999.9 12.6 15.0 15.6 22.2 999.9 25.4 19.1 11.9 17.6 18.51 1981 25.4 22.6 22.9 22.0 15.4 9.9 11.4 11.5 14.8 16.8 18.7 22.2 23.4 20.1 10.9 16.8 17.81 1982 24.2 26.9 20.9 19.1 14.4 11.8 10.6 13.3 13.6 17.5 23.1 24.8 24.4 18.1 11.9 18.1 18.13 1983 26.1 24.6 23.5 999.9 16.1 14.1 11.1 13.8 15.3 18.2 19.4 23.6 25.2 19.8 13.0 17.6 18.90 1984 25.3 25.0 20.4 20.0 14.9 11.6 10.5 11.1 13.1 17.6 19.8 999.9 24.6 18.4 11.1 16.8 17.74 1985 25.3 28.4 24.3 17.8 14.6 13.8 12.0 11.9 14.5 16.9 21.7 21.4 26.3 18.9 12.6 17.7 18.87 1986 26.8 999.9 22.9 17.9 14.8 999.9 9.9 10.3 999.9 999.9 999.9 999.9 24.3 18.5 10.4 999.9 17.39 1987 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 17.2 19.2 999.9 999.9 999.9 999.9 16.5 999.90 1988 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.90 1989 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.90 1990 23.8 24.1 22.9 18.3 15.1 10.4 9.7 11.2 14.0 16.2 20.9 23.4 23.4 18.8 10.4 17.0 17.41 1991 25.4 25.9 23.2 20.0 16.0 13.6 11.7 11.8 14.3 999.9 18.9 24.7 24.9 19.7 12.4 16.5 18.36 1992 26.0 24.4 23.1 19.4 14.2 13.2 12.4 11.7 12.0 999.9 999.9 999.9 25.0 18.9 12.4 999.9 18.45