Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann 1895 6.48 3.22 4.70 4.06 4.60 4.10 7.16 10.02 2.76 1.40 2.11 2.31 52.92 1896 3.86 4.03 2.56 .34 1.82 4.94 11.82 5.34 3.83 1.69 4.64 3.92 48.79 1897 2.74 7.42 5.84 4.73 1.58 5.05 8.27 7.13 7.86 3.82 1.28 2.14 57.86 1898 1.34 .97 1.54 2.95 .64 4.00 12.46 15.42 6.07 8.25 2.88 4.28 60.80 1899 4.80 6.50 2.08 2.83 .76 3.43 5.52 7.30 3.82 5.86 .79 1.67 45.36 1900 2.58 5.72 5.58 3.24 3.01 10.63 7.18 3.55 3.37 3.66 1.92 5.26 55.70 1901 3.75 4.21 5.70 2.03 6.09 7.58 5.13 12.85 7.96 1.14 .36 2.87 59.67 1902 .68 5.91 6.90 1.00 2.23 5.03 6.88 5.51 7.67 4.55 2.94 3.24 52.54 1903 3.56 5.61 5.70 1.66 4.60 8.32 5.64 8.52 7.95 2.00 2.59 1.80 57.95 1904 3.93 3.21 1.47 1.37 1.52 3.96 4.70 10.25 2.50 1.91 2.60 2.53 39.95 1905 1.57 4.21 2.78 2.29 5.10 3.58 6.91 8.41 5.21 1.29 .91 8.37 50.63 1906 5.80 1.92 3.93 .95 5.42 9.22 10.71 8.16 2.92 3.41 1.40 2.10 55.94 1907 1.10 1.81 .39 4.12 3.18 5.85 7.29 6.30 8.49 .41 3.00 5.95 47.89 1908 3.96 3.68 2.35 6.31 1.62 4.65 6.41 8.52 6.56 3.68 1.46 2.13 51.33 1909 1.93 3.15 6.04 1.99 3.45 6.72 9.13 7.08 4.30 1.55 .65 2.65 48.64 1910 2.37 3.77 1.24 2.42 2.73 9.19 7.32 6.71 2.94 5.41 1.45 1.97 47.52 1911 1.13 .74 2.17 2.66 2.53 3.36 6.94 9.09 4.00 6.14 3.67 5.07 47.50 1912 5.66 5.05 6.09 5.85 4.93 8.64 7.62 6.51 9.09 3.25 2.34 1.61 66.64 1913 1.40 4.55 7.47 .92 1.62 6.37 7.00 6.49 2.25 2.31 .55 3.05 43.98 1914 3.11 5.26 1.62 1.65 .65 4.45 6.52 7.48 4.35 5.27 3.38 3.53 47.27 1915 5.08 3.06 2.00 .21 7.25 4.72 5.40 7.41 2.06 8.51 2.28 3.21 51.19 1916 .75 2.23 .74 1.09 1.86 5.52 14.48 4.66 3.37 3.03 2.36 4.06 44.15 1917 3.03 3.29 4.98 2.01 2.81 4.03 6.07 7.68 5.68 1.35 .38 1.90 43.21 1918 3.76 1.45 1.35 4.05 1.95 4.62 6.25 6.36 4.13 2.70 3.42 5.22 45.26 1919 3.29 5.56 3.92 1.48 4.80 7.71 11.62 7.45 3.07 .60 2.33 3.62 55.45 1920 3.28 4.76 4.80 6.41 3.94 3.88 7.84 9.92 6.72 1.08 3.62 3.65 59.90 1921 2.04 2.73 .50 1.36 6.32 3.29 10.70 6.00 2.23 4.55 3.11 1.96 44.79 1922 2.18 4.59 5.30 1.79 7.90 6.54 7.14 6.16 4.12 6.22 .86 3.18 55.98 1923 3.05 2.62 4.13 2.22 9.29 5.94 5.41 7.97 3.69 .66 .87 2.15 48.00 1924 3.94 2.88 4.28 4.80 3.03 5.55 9.64 3.32 17.51 5.54 .38 4.01 64.88 1925 8.75 1.32 1.11 1.32 3.31 3.82 4.73 3.92 .77 2.73 3.96 5.23 40.97 1926 6.27 3.16 4.78 2.66 1.20 5.20 9.55 7.05 3.79 1.17 2.83 1.35 49.01 1927 .97 3.00 2.27 1.91 .21 7.16 9.58 5.59 2.23 2.05 .77 5.14 40.88 1928 1.46 4.69 5.85 6.77 4.25 6.32 9.83 14.34 14.05 1.40 .36 1.81 71.13 1929 3.85 5.12 6.80 3.52 5.15 6.73 6.99 5.41 14.35 4.76 1.72 3.17 67.57 1930 4.69 1.87 6.78 3.67 2.06 5.60 7.08 2.60 7.08 1.07 3.78 3.81 50.09 1931 2.40 1.98 2.84 1.23 1.63 2.88 5.35 4.92 1.53 .31 .34 2.16 27.57 1932 1.73 1.30 2.94 .82 3.34 10.22 5.05 8.42 8.07 4.16 4.05 .44 50.54 1933 3.97 6.47 1.95 3.73 1.64 4.65 6.34 5.44 9.06 4.98 .76 1.05 50.04 1934 1.97 3.10 1.84 1.48 8.99 3.85 3.54 7.65 2.30 3.15 1.29 1.43 40.59 1935 2.18 3.00 1.91 3.33 2.12 2.67 11.21 5.62 12.26 .32 .83 2.06 47.51 1936 4.01 5.03 3.48 2.28 2.61 4.21 6.94 5.01 4.79 4.91 .63 3.98 47.88 1937 2.17 4.82 4.03 5.06 1.77 6.95 9.10 8.85 6.11 4.80 2.69 1.06 57.41 1938 .92 .79 1.44 2.30 3.89 6.59 6.45 4.37 6.15 2.56 1.11 2.05 38.62 1939 1.65 5.15 1.70 3.70 3.89 6.27 4.86 7.05 3.81 .96 .97 2.13 42.14 1940 3.55 4.84 2.17 2.39 1.13 5.08 6.92 8.86 2.25 .29 1.04 4.01 42.53 1941 .86 2.26 4.03 1.59 .71 10.29 7.21 6.96 2.88 3.56 1.90 5.73 47.98 1942 5.03 4.16 6.19 .57 2.44 6.03 6.12 4.49 3.94 .48 1.32 4.66 45.43 1943 3.93 .96 4.56 2.04 3.89 5.17 6.66 7.29 2.27 .05 .98 3.41 41.21 1944 3.69 4.06 10.53 4.80 1.96 4.04 9.20 10.11 6.20 7.22 1.87 .60 64.28 1945 3.24 2.46 .60 5.26 1.80 4.01 10.58 9.14 10.79 2.22 .81 5.98 56.89 1946 2.66 1.54 4.54 2.47 6.19 4.89 7.41 5.72 5.04 4.85 2.16 .31 47.78 1947 3.03 1.36 6.08 4.75 3.01 7.10 4.49 5.13 11.72 8.67 5.96 6.31 67.61 1948 3.98 1.58 9.23 6.02 5.14 2.97 9.87 4.13 6.29 3.88 3.71 5.01 61.81 1949 .83 3.87 1.12 4.95 2.94 6.16 4.11 11.20 5.47 2.30 1.13 1.74 45.82 1950 .48 .83 5.82 2.35 3.65 2.44 8.33 3.34 13.49 7.59 1.23 2.87 52.42 1951 .90 1.28 5.22 2.18 1.38 3.73 7.02 4.35 7.64 3.80 3.67 3.82 44.99 1952 1.18 4.03 3.53 2.30 5.99 2.38 4.19 6.72 3.59 2.37 1.58 2.17 40.03 1953 2.35 4.95 3.18 4.82 .92 5.36 9.53 7.92 12.98 1.18 1.55 5.61 60.35 1954 .97 1.59 1.28 2.02 3.16 2.11 3.13 3.27 7.11 1.59 1.79 2.88 30.90 1955 4.79 1.77 .56 3.36 3.61 4.75 6.11 4.50 8.50 2.47 .85 .51 41.78 1956 2.37 2.87 1.86 3.23 3.62 6.52 4.76 4.80 5.25 4.35 .17 .41 40.21 1957 .49 2.16 4.71 3.61 7.97 7.00 8.54 4.68 7.76 2.97 4.67 1.88 56.44 1958 2.86 3.19 4.79 6.58 2.73 6.12 5.45 3.98 2.87 2.04 .81 2.05 43.47 1959 4.17 6.34 9.50 2.39 5.87 4.30 6.96 5.63 7.44 7.58 1.88 1.36 63.42 1960 2.50 6.10 3.54 4.00 2.85 4.93 9.52 4.31 7.20 1.92 .76 1.71 49.34 1961 3.55 4.05 4.14 7.01 3.75 3.93 6.23 9.51 2.15 .14 1.52 2.34 48.32 1962 3.66 1.87 5.64 3.66 2.17 9.52 5.69 6.26 6.05 1.84 2.77 2.80 51.93 1963 3.68 5.91 1.90 2.55 3.78 10.66 5.65 3.97 4.48 .38 2.35 2.58 47.89 1964 8.00 7.27 2.84 3.62 2.95 4.05 13.35 9.18 5.22 6.20 2.18 5.52 70.38 1965 1.21 4.77 8.70 1.69 1.22 5.94 6.78 6.00 5.88 1.93 1.22 3.87 49.21 1966 6.72 4.24 5.07 1.83 9.28 4.11 9.42 4.47 3.26 2.73 .51 2.72 54.36 1967 6.65 3.28 .66 1.09 2.57 4.90 9.80 8.47 2.27 1.47 .91 3.13 45.20 1968 1.73 1.67 1.75 1.88 4.66 5.81 6.19 5.54 1.93 4.00 2.85 3.85 41.86 1969 1.25 2.61 5.64 .83 6.86 4.67 6.29 11.81 6.34 3.15 4.78 3.79 58.02 1970 3.18 3.61 6.93 1.44 6.47 3.25 6.15 8.94 3.01 3.39 .80 2.98 50.15 1971 2.39 3.13 3.18 3.25 2.98 5.31 9.19 10.81 2.43 4.64 1.27 5.13 53.71 1972 4.82 4.80 4.37 1.17 4.91 7.71 3.23 7.18 1.16 1.16 3.88 2.98 47.37 1973 3.90 5.16 5.90 7.25 3.67 8.24 4.76 6.94 5.97 1.10 .90 4.87 58.66 1974 1.22 3.36 2.70 1.99 4.18 6.92 6.73 8.42 6.94 .20 1.15 2.44 46.25 1975 4.82 2.74 4.19 5.77 5.14 4.29 8.49 3.09 5.49 2.03 .94 3.08 50.07 1976 2.83 1.06 2.59 1.39 9.36 7.19 4.75 7.86 7.62 5.11 5.72 4.74 60.22 1977 3.84 2.30 3.22 1.25 2.40 2.72 5.01 6.77 7.82 1.08 4.19 5.89 46.49 1978 4.15 2.91 3.19 2.58 3.95 4.10 5.89 4.78 2.66 .77 1.13 2.47 38.58 1979 5.14 4.15 1.51 3.57 7.27 5.14 7.84 5.72 10.67 .68 2.74 2.97 57.40 1980 3.82 1.74 9.06 4.21 3.66 3.22 3.81 3.29 3.61 3.79 2.23 .93 43.37 1981 1.14 3.63 4.46 1.81 2.74 4.08 4.61 7.41 1.29 1.46 2.69 3.53 38.85 1982 3.62 3.46 2.95 6.45 3.01 7.72 8.07 4.09 4.46 1.78 1.43 3.46 50.50 1983 6.38 5.41 7.82 5.77 1.07 4.27 6.51 4.36 2.58 1.39 4.84 6.46 56.86 1984 5.46 3.80 7.91 3.41 4.13 4.58 6.84 3.91 5.14 2.29 3.17 .27 50.91 1985 1.53 1.94 2.27 2.01 3.87 4.74 5.81 9.79 2.24 6.42 3.33 2.98 46.93 1986 3.02 6.69 3.23 .43 1.56 4.03 3.39 8.80 2.03 3.09 5.99 5.50 47.76 1987 8.74 6.24 4.96 .51 1.67 5.40 5.22 5.46 5.56 .27 2.34 1.38 47.75 1988 4.35 6.57 2.75 4.92 2.00 2.07 3.25 7.07 8.10 2.18 2.65 1.15 47.06 1989 .75 1.38 2.81 2.55 2.39 7.04 5.95 7.56 6.80 3.51 1.34 4.87 46.95