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 1901 20.6 19.4 17.4 15.2 12.4 10.0 8.7 10.0 12.4 14.5 16.3 17.9 19.4 15.0 9.6 14.4 14.59 1902 17.8 18.4 19.2 15.7 12.7 9.7 9.7 11.1 11.7 12.6 15.6 16.6 18.0 15.9 10.2 13.3 14.34 1903 20.7 19.8 15.6 13.2 11.7 11.1 9.1 10.2 11.2 12.8 16.0 18.0 19.0 13.5 10.1 13.3 14.00 1904 20.4 18.8 19.6 15.3 11.6 10.5 9.5 11.1 12.1 12.7 16.4 18.7 19.1 15.5 10.4 13.7 14.67 1905 19.1 19.2 17.2 16.3 12.7 10.2 10.1 9.3 10.8 13.1 16.5 20.4 19.0 15.4 9.9 13.5 14.43 1906 21.2 19.6 18.7 16.5 13.3 11.4 9.0 10.3 10.2 14.6 16.3 20.4 20.4 16.2 10.2 13.7 15.13 1907 20.8 20.8 18.9 15.8 12.8 11.5 11.0 12.1 12.4 13.1 15.7 17.8 20.7 15.8 11.5 13.7 15.44 1908 19.5 19.1 16.4 15.2 12.0 9.3 9.6 9.7 11.1 13.3 16.1 18.9 18.8 14.5 9.5 13.5 14.09 1909 20.0 19.8 18.2 14.4 12.9 10.6 9.5 10.1 11.9 13.4 15.2 20.7 19.6 15.2 10.1 13.5 14.58 1910 20.3 21.3 19.4 17.5 12.5 10.4 9.4 11.4 12.3 12.1 15.6 18.3 20.8 16.5 10.4 13.3 15.24 1911 21.8 20.2 17.6 15.5 11.6 10.5 9.7 10.0 11.8 13.9 17.4 18.4 20.1 14.9 10.1 14.4 14.86 1912 22.1 21.5 20.2 15.8 13.3 11.5 10.1 11.1 11.6 14.4 15.8 19.3 20.7 16.4 10.9 13.9 15.48 1913 19.7 20.9 19.0 15.8 13.6 12.4 10.8 11.2 13.8 12.9 17.5 19.5 20.0 16.1 11.5 14.7 15.58 1914 22.3 19.0 17.4 14.0 10.6 10.7 9.4 11.2 12.6 14.9 16.2 19.7 20.3 14.0 10.4 14.6 14.82 1915 22.3 21.3 17.8 16.7 13.7 11.9 10.9 10.8 11.2 13.4 17.6 20.4 21.1 16.1 11.2 14.1 15.61 1916 19.5 19.8 18.4 14.8 12.6 9.7 8.5 9.5 12.5 12.6 16.3 18.1 19.9 15.3 9.2 13.8 14.55 1917 19.8 19.7 16.7 14.4 12.2 10.9 10.2 9.3 11.0 12.5 15.4 17.4 19.2 14.4 10.1 13.0 14.18 1918 22.2 20.0 17.0 17.7 13.0 11.5 9.3 9.9 12.6 13.2 18.1 18.6 19.9 15.9 10.2 14.6 15.16 1919 19.4 19.7 20.3 15.6 12.3 10.3 11.0 10.4 10.9 12.3 16.3 18.0 19.2 16.1 10.6 13.2 14.76 1920 22.9 19.2 18.6 15.2 12.3 10.6 8.6 9.6 12.2 14.2 17.4 18.3 20.0 15.4 9.6 14.6 14.90 1921 21.0 23.6 20.2 15.7 14.1 11.9 11.2 10.7 11.7 13.2 14.6 19.9 21.0 16.7 11.3 13.2 15.52 1922 18.8 19.5 18.8 15.0 11.7 10.5 8.5 10.4 11.0 13.3 15.8 16.3 19.4 15.2 9.8 13.4 14.43 1923 19.5 21.8 20.2 17.2 13.5 9.7 9.7 10.5 10.8 13.6 16.4 18.3 19.2 17.0 10.0 13.6 14.93 1924 19.3 19.5 16.5 16.1 12.8 10.3 10.8 9.1 12.4 12.1 15.6 18.8 19.0 15.1 10.1 13.4 14.40 1925 19.5 19.7 18.5 15.3 12.4 10.6 9.2 9.4 12.1 12.5 18.4 20.1 19.3 15.4 9.7 14.3 14.70 1926 22.2 19.0 18.3 15.7 12.8 10.5 10.1 10.1 12.3 14.1 17.2 18.2 20.4 15.6 10.2 14.5 15.20 1927 19.4 19.5 17.3 17.5 12.2 9.8 9.6 10.6 12.9 14.3 17.9 22.0 19.0 15.7 10.0 15.0 14.93 1928 21.3 20.0 19.3 16.0 12.1 10.7 10.4 11.5 12.1 12.8 17.7 19.6 21.1 15.8 10.9 14.2 15.49 1929 20.1 21.7 18.3 15.6 12.4 10.2 9.4 9.9 12.1 14.2 17.3 19.8 20.5 15.4 9.8 14.5 15.07 1930 21.6 21.4 21.3 16.8 14.3 13.1 10.6 11.0 12.3 13.8 17.6 19.0 20.9 17.5 11.6 14.6 16.13 1931 21.7 18.9 19.6 16.4 11.4 8.5 11.0 10.7 11.3 14.3 18.0 22.8 19.9 15.8 10.1 14.5 15.07 1932 22.6 22.4 17.6 15.7 13.3 11.1 10.1 9.8 12.6 14.1 16.9 20.0 22.6 15.5 10.3 14.5 15.75 1933 21.9 23.6 19.3 16.9 13.2 12.5 10.0 10.2 11.3 14.2 17.1 20.5 21.8 16.5 10.9 14.2 15.85 1934 22.8 22.6 20.0 15.9 14.9 11.0 10.2 10.6 12.3 12.9 15.3 18.6 22.0 16.9 10.6 13.5 15.75 1935 21.9 20.2 18.6 16.4 13.0 9.8 9.5 10.2 11.4 13.2 16.0 19.6 20.2 16.0 9.8 13.5 14.90 1936 20.5 20.0 20.2 16.0 11.8 10.4 9.9 11.4 13.4 14.5 17.7 20.5 20.0 16.0 10.6 15.2 15.45 1937 21.2 21.2 19.6 18.1 13.5 10.5 9.8 9.9 11.5 14.0 17.5 18.1 21.0 17.1 10.1 14.3 15.61 1938 19.2 19.2 18.3 15.7 12.3 9.8 9.7 10.9 13.0 14.0 16.8 18.4 18.8 15.4 10.1 14.6 14.75 1939 19.4 20.6 18.4 15.9 13.3 9.6 9.8 10.3 12.4 14.4 16.2 19.8 19.5 15.9 9.9 14.3 14.89 1940 20.6 22.4 18.7 14.4 12.1 11.2 10.4 11.2 12.2 14.0 17.0 18.9 20.9 15.1 10.9 14.4 15.33 1941 21.8 21.2 18.4 14.6 12.3 11.6 10.3 11.4 10.8 13.5 16.4 20.1 20.6 15.1 11.1 13.6 15.10 1942 20.1 20.0 17.5 15.7 13.3 10.6 9.6 10.5 11.3 12.1 16.4 19.3 20.1 15.5 10.2 13.3 14.77 1943 18.5 19.4 18.7 15.0 11.5 11.0 8.6 9.3 11.3 12.6 16.2 18.1 19.1 15.1 9.6 13.4 14.28 1944 20.2 20.1 17.1 15.0 11.0 10.0 9.8 9.9 11.7 14.6 16.7 16.9 19.5 14.4 9.9 14.3 14.52 1945 18.5 21.4 18.6 17.5 14.4 11.9 10.3 11.1 11.8 12.8 16.0 16.6 18.9 16.8 11.1 13.5 15.10 1946 999.9 17.4 16.0 999.9 999.9 10.0 9.5 9.7 13.0 14.3 15.2 19.0 17.3 999.9 9.7 14.2 13.97 1947 19.2 20.6 18.8 15.6 12.1 11.9 10.3 10.1 11.1 13.5 15.5 16.8 19.6 15.5 10.8 13.4 14.81 1948 20.6 21.1 20.8 13.9 13.0 11.4 10.3 11.7 11.8 14.0 15.5 16.5 19.5 15.9 11.1 13.8 15.08 1949 21.4 20.5 18.0 16.8 12.3 11.7 11.1 11.7 11.9 12.7 16.8 19.1 19.5 15.7 11.5 13.8 15.12 1950 21.4 20.4 19.6 16.5 13.6 11.7 10.8 10.9 11.7 12.5 14.8 999.9 20.3 16.6 11.1 13.0 15.25 1951 20.0 20.5 19.4 15.2 12.7 11.1 9.9 9.2 13.0 13.4 16.2 18.0 19.6 15.8 10.1 14.2 14.92 1952 20.5 21.1 18.0 15.9 12.6 12.0 9.6 10.7 11.0 12.1 15.1 16.1 19.9 15.5 10.8 12.7 14.72 1953 20.4 20.3 19.7 16.1 13.4 10.3 10.7 9.8 12.4 13.0 15.4 16.9 18.9 16.4 10.3 13.6 14.80 1954 22.3 20.8 18.8 14.0 12.4 10.5 10.3 10.9 12.6 14.4 14.6 18.6 20.0 15.1 10.6 13.9 14.88 1955 21.9 22.4 18.5 15.8 11.9 9.5 9.6 10.8 11.0 12.6 15.3 17.9 21.0 15.4 10.0 13.0 14.83 1956 22.5 21.5 19.5 14.3 12.3 9.4 9.1 9.0 11.7 12.4 16.4 18.0 20.6 15.4 9.2 13.5 14.67 1957 21.5 20.1 18.1 15.6 13.1 11.8 9.6 11.7 12.1 14.1 17.6 19.2 19.9 15.6 11.0 14.6 15.28 1958 23.1 20.5 19.9 15.5 14.4 11.0 9.7 10.6 11.5 13.1 16.7 20.4 20.9 16.6 10.4 13.8 15.43 1959 20.4 21.3 20.3 16.1 12.8 12.8 11.3 12.1 11.8 14.0 16.0 16.5 20.7 16.4 12.1 13.9 15.78 1960 18.8 20.6 17.3 14.0 11.6 10.5 9.3 10.5 11.4 13.9 15.7 19.0 18.6 14.3 10.1 13.7 14.18 1961 999.9 22.5 20.4 14.9 14.3 11.3 9.7 10.6 13.3 14.2 17.0 20.0 21.1 16.5 10.5 14.8 15.74 1962 23.7 21.2 16.9 16.7 14.8 12.5 10.4 11.8 12.1 12.4 16.6 20.4 21.6 16.1 11.6 13.7 15.76 1963 21.0 20.9 21.0 15.9 14.2 11.2 10.2 10.9 12.7 15.1 17.4 20.5 20.8 17.0 10.8 15.1 15.91 1964 19.7 20.4 18.6 14.5 12.2 12.2 10.9 10.2 11.3 11.5 15.0 18.4 20.2 15.1 11.1 12.6 14.75 1965 21.2 20.2 18.6 16.2 12.0 10.9 9.8 10.7 12.4 15.1 16.1 20.7 19.9 15.6 10.5 14.5 15.13 1966 21.5 20.2 19.1 15.8 12.0 10.4 9.9 9.5 11.3 13.2 17.2 18.8 20.8 15.6 9.9 13.9 15.07 1967 20.7 22.6 18.5 16.6 12.8 12.6 10.0 9.5 12.6 15.6 16.8 19.5 20.7 16.0 10.7 15.0 15.59 1968 20.9 20.4 16.2 14.1 11.2 11.0 10.1 9.6 10.9 13.5 15.3 18.3 20.3 13.8 10.2 13.2 14.39 1969 20.3 20.8 18.7 15.5 12.4 11.4 10.1 10.3 10.0 15.9 17.4 19.7 19.8 15.5 10.6 14.4 15.09 1970 21.4 23.0 20.1 15.2 12.8 11.3 11.1 10.4 11.9 13.3 15.8 20.1 21.4 16.0 10.9 13.7 15.50 1971 20.8 20.5 19.2 15.0 12.5 11.1 10.3 10.1 11.2 12.5 14.3 17.7 20.5 15.6 10.5 12.7 14.80 1972 22.0 23.1 19.8 15.6 14.5 11.4 10.8 10.6 12.3 13.8 18.0 21.5 20.9 16.6 10.9 14.7 15.80 1973 21.4 20.9 17.8 16.0 12.8 9.4 11.0 9.9 11.5 13.9 16.5 18.6 21.3 15.5 10.1 14.0 15.22 1974 22.2 20.5 19.8 15.5 12.8 11.2 10.2 10.8 12.4 12.9 15.3 19.0 20.4 16.0 10.7 13.5 15.18 1975 20.4 23.8 17.9 15.0 13.1 10.9 999.9 10.1 11.0 13.9 15.9 19.8 21.1 15.3 10.3 13.6 15.07 1976 20.9 22.5 19.8 17.1 13.6 10.7 11.4 10.9 12.7 15.9 14.6 19.3 21.1 16.8 11.0 14.4 15.83 1977 21.4 22.9 17.9 16.5 13.0 11.5 10.9 11.8 11.7 14.4 16.7 22.1 21.2 15.8 11.4 14.3 15.67 1978 22.6 22.8 21.7 17.5 13.5 11.0 9.7 10.9 11.4 13.5 17.7 20.1 22.5 17.6 10.5 14.2 16.20 1979 20.8 21.1 19.9 15.6 11.7 12.2 10.5 9.8 12.0 14.6 17.1 20.3 20.7 15.7 10.8 14.6 15.45 1980 22.3 20.8 20.5 14.3 13.8 10.9 10.8 11.4 12.4 11.8 17.1 18.7 21.1 16.2 11.0 13.8 15.53 1981 22.0 18.8 19.3 17.3 12.6 9.5 10.8 10.4 12.6 14.1 999.9 17.9 19.8 16.4 10.2 14.6 15.26 1982 19.6 20.7 17.3 15.0 12.9 9.8 10.4 11.0 12.0 14.7 18.3 19.6 19.4 15.1 10.4 15.0 14.97 1983 22.3 20.4 20.9 16.2 14.2 12.2 10.0 12.2 13.5 14.3 16.7 20.0 20.8 17.1 11.5 14.8 16.04 1984 21.4 21.5 17.9 16.4 12.9 10.1 9.9 10.3 11.5 14.3 16.2 16.7 21.0 15.7 10.1 14.0 15.20 1985 20.3 24.4 20.2 15.1 12.0 12.4 10.2 10.7 12.2 12.9 17.4 17.0 20.5 15.8 11.1 14.2 15.38 1986 22.0 19.4 18.1 14.4 12.4 11.0 9.1 9.3 12.0 12.2 16.5 18.6 19.5 15.0 9.8 13.6 14.45 1987 20.4 19.9 19.9 16.5 12.5 12.0 9.9 11.2 12.6 13.7 16.1 19.9 19.6 16.3 11.0 14.1 15.28 1988 20.6 23.2 21.2 17.8 14.1 11.8 9.7 10.9 12.9 14.4 16.1 19.8 21.2 17.7 10.8 14.5 16.05 1989 21.5 21.2 19.6 16.0 13.4 10.7 9.5 10.1 12.4 12.9 17.8 18.3 20.8 16.3 10.1 14.4 15.41 1990 19.6 22.3 20.0 15.7 13.0 9.2 8.8 9.8 12.1 13.8 16.3 18.9 20.1 16.2 9.3 14.1 14.91 1991 21.3 20.4 19.4 999.9 13.5 11.9 10.6 10.9 12.3 15.2 15.3 20.4 20.2 16.4 11.1 14.3 15.51 1992 999.9 21.3 19.4 16.1 12.5 11.1 11.5 10.4 10.7 14.4 999.9 999.9 21.2 16.0 11.0 13.8 15.49