Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann 1895 7.99 3.39 5.79 5.41 4.13 4.49 5.48 7.93 1.80 .90 1.80 2.82 51.93 1896 4.38 4.91 3.26 .39 2.17 4.22 8.91 4.01 2.83 1.24 6.25 4.39 46.96 1897 3.40 8.42 7.91 5.86 1.26 3.27 6.63 6.06 3.29 2.54 1.02 2.65 52.31 1898 2.50 .71 1.79 3.61 1.17 3.30 9.76 12.39 5.13 7.53 4.19 4.68 56.76 1899 5.78 7.81 2.91 3.36 1.81 2.60 5.68 5.57 1.92 3.94 1.20 2.08 44.66 1900 2.98 7.87 6.10 3.72 2.83 10.08 5.87 3.24 3.09 3.18 2.58 5.96 57.50 1901 4.75 4.70 6.70 2.50 4.46 5.50 5.90 9.59 6.27 .79 .49 3.94 55.59 1902 .94 7.76 8.87 1.04 2.15 3.27 5.79 3.95 5.52 3.29 3.13 3.90 49.61 1903 3.39 6.95 6.48 2.60 6.58 6.34 4.67 6.22 5.86 1.76 3.02 1.96 55.83 1904 4.49 3.95 1.43 1.43 2.25 3.05 4.29 8.06 1.32 .31 3.14 3.35 37.07 1905 2.46 5.99 3.12 2.77 4.32 3.79 6.29 6.46 3.90 1.79 1.52 9.86 52.27 1906 6.88 1.84 5.06 .92 5.62 6.46 9.47 6.09 4.04 3.20 1.44 2.89 53.91 1907 1.37 2.41 .94 5.39 3.07 4.15 5.94 4.68 6.55 .32 4.67 6.77 46.26 1908 4.31 5.08 3.11 8.37 1.98 3.27 7.18 5.85 3.99 2.70 1.10 2.87 49.81 1909 2.30 4.82 7.76 2.60 3.37 6.10 6.36 5.63 2.94 1.09 .83 3.01 46.81 1910 2.97 4.45 1.65 3.59 3.11 7.84 5.65 4.99 2.34 3.02 1.94 2.52 44.07 1911 1.91 1.63 2.99 3.61 3.46 3.00 6.02 7.03 2.95 4.67 4.03 6.63 47.93 1912 6.49 6.09 7.33 7.61 4.32 7.52 6.15 5.56 6.31 2.45 2.56 1.97 64.36 1913 2.57 4.84 8.67 .80 2.35 5.07 6.94 5.18 3.69 1.86 .43 3.06 45.46 1914 2.94 6.15 2.02 1.95 1.01 3.59 5.33 5.84 3.60 4.77 5.48 4.15 46.83 1915 5.70 3.60 2.23 .00 5.82 3.94 4.91 4.65 2.77 7.02 1.73 4.38 46.75 1916 1.48 3.26 .99 1.12 2.75 4.17 15.37 3.46 2.38 2.10 2.10 4.46 43.64 1917 4.64 4.79 6.73 2.52 2.58 2.99 5.40 6.82 6.02 1.00 .96 1.89 46.34 1918 5.51 2.03 1.41 4.85 .82 4.30 5.92 5.09 3.14 3.39 4.79 6.45 47.70 1919 4.56 7.07 4.55 1.76 3.99 6.28 11.32 6.37 1.96 1.68 1.73 4.56 55.83 1920 4.64 5.21 5.82 8.23 5.75 3.66 7.36 7.39 3.26 .67 4.20 4.65 60.84 1921 2.13 3.69 .37 1.93 4.02 2.54 7.74 4.28 1.56 2.35 3.90 1.99 36.50 1922 3.39 6.01 6.53 1.76 7.55 5.14 5.39 4.56 2.30 3.60 .75 4.32 51.30 1923 4.54 3.89 4.96 2.91 9.49 5.80 5.45 5.60 2.27 .22 1.69 2.88 49.70 1924 5.21 3.50 4.50 6.04 2.91 4.89 6.76 2.84 11.65 1.99 .48 5.46 56.23 1925 10.88 1.37 1.71 1.38 2.34 2.98 3.91 3.26 1.27 3.59 4.50 5.32 42.51 1926 7.70 4.30 5.76 2.73 2.03 4.51 8.08 5.55 3.87 1.08 3.23 2.63 51.47 1927 1.10 3.39 1.95 2.33 .99 6.05 7.54 4.26 1.40 1.29 .71 6.84 37.85 1928 1.63 5.62 7.26 8.42 3.33 6.71 7.84 10.39 6.47 1.54 .39 1.79 61.39 1929 4.83 7.69 8.98 3.92 4.39 5.66 5.61 4.14 11.84 4.47 2.90 3.41 67.84 1930 5.56 1.60 7.52 4.65 2.04 4.17 6.80 2.35 6.35 .86 5.37 3.93 51.20 1931 3.05 2.57 3.28 2.11 2.98 2.23 6.23 7.52 1.49 .90 .07 3.26 35.69 1932 4.88 1.71 4.56 1.10 2.90 7.64 5.56 9.04 5.92 4.23 4.13 1.41 53.08 1933 4.71 5.96 3.98 5.11 1.98 2.64 6.27 4.73 5.10 .39 .88 1.36 43.11 1934 1.91 3.41 4.48 1.87 6.63 5.07 5.25 4.90 1.72 3.07 1.19 1.34 40.84 1935 2.50 4.63 2.49 2.60 3.34 3.21 10.81 7.25 7.07 .16 1.72 1.91 47.69 1936 4.72 5.79 3.45 5.44 2.25 3.41 6.47 7.24 2.69 4.08 .17 4.31 50.02 1937 4.32 5.33 4.76 6.33 1.63 5.20 8.22 4.92 4.10 2.96 2.60 1.61 51.98 1938 1.81 .99 2.04 2.79 3.09 5.47 6.44 4.05 4.60 1.60 1.09 2.60 36.57 1939 2.85 8.52 1.83 6.19 4.38 5.88 4.44 8.19 3.66 .15 1.29 2.77 50.15 1940 3.35 4.83 2.28 3.52 2.19 5.14 7.70 5.35 1.19 .72 2.80 3.62 42.69 1941 1.38 2.45 4.52 1.71 1.31 5.82 5.80 4.33 3.11 2.50 1.42 6.06 40.41 1942 6.64 4.65 7.05 1.18 3.33 6.99 4.47 5.43 5.15 .91 1.51 4.44 51.75 1943 3.84 1.71 5.66 2.81 6.72 5.05 4.48 4.72 2.74 .00 1.39 3.84 42.96 1944 4.26 5.08 11.11 8.29 2.08 3.77 7.10 5.54 4.28 4.27 1.92 .93 58.63 1945 3.79 3.29 1.70 6.91 2.46 3.84 11.23 6.53 3.93 1.92 1.31 7.86 54.77 1946 4.02 2.32 5.10 2.62 5.08 5.07 7.83 4.63 3.92 2.72 .84 .31 44.46 1947 5.33 1.09 7.87 6.15 4.51 4.19 3.35 6.32 6.10 6.86 9.31 6.29 67.37 1948 3.67 2.16 11.53 8.11 2.81 3.09 6.79 4.99 3.35 4.24 4.17 5.20 60.11 1949 1.16 4.75 2.72 5.32 3.11 6.97 5.39 8.62 2.52 2.40 .91 1.42 45.29 1950 .84 1.21 6.20 2.14 3.35 3.43 8.02 2.89 2.31 3.76 1.30 3.52 38.97 1951 1.25 1.84 7.80 2.63 2.21 3.27 5.91 3.68 6.01 1.00 4.67 5.83 46.10 1952 1.77 5.07 4.58 2.33 4.27 1.85 3.32 6.51 4.39 1.28 1.46 2.89 39.72 1953 3.76 5.74 2.56 5.92 2.52 5.21 6.97 6.94 8.72 .86 1.54 7.83 58.57 1954 .98 1.33 1.92 2.66 2.45 2.43 2.92 4.15 1.96 .63 2.39 2.74 26.56 1955 4.31 2.02 .68 4.47 3.60 1.53 7.99 3.43 5.35 2.46 .55 .76 37.15 1956 3.28 5.70 2.79 3.10 4.38 4.00 5.04 2.98 7.04 3.99 .57 1.71 44.58 1957 .96 2.06 4.84 3.57 5.84 6.10 5.67 2.80 8.75 1.61 6.02 1.88 50.10 1958 3.23 4.03 4.76 6.88 5.14 7.01 6.05 3.63 .87 1.22 .94 2.55 46.31 1959 4.02 8.31 10.14 2.38 7.21 4.03 6.90 4.13 2.12 6.85 .59 3.35 60.03 1960 3.24 6.48 3.53 6.53 2.53 4.85 5.85 6.26 3.99 1.37 .48 1.89 47.00 1961 4.79 4.40 4.67 7.98 3.73 4.39 3.19 8.22 2.24 .04 1.76 3.88 49.29 1962 3.63 3.31 4.71 4.60 .86 4.76 4.95 4.98 4.57 1.82 3.36 2.62 44.17 1963 4.92 4.66 3.18 2.03 4.46 7.23 5.47 4.29 4.24 .03 2.19 3.35 46.05 1964 8.70 7.88 4.59 5.51 3.19 5.59 10.30 5.95 4.48 6.10 1.42 9.11 72.82 1965 2.48 7.01 7.43 3.55 .51 8.53 4.61 4.10 5.04 2.30 1.40 3.80 50.76 1966 6.23 6.35 4.53 1.46 7.25 4.45 6.60 4.34 3.19 3.56 2.41 2.82 53.19 1967 7.64 3.88 1.47 1.00 3.69 5.74 5.86 5.53 1.57 1.06 1.51 4.27 43.22 1968 1.82 1.72 2.23 2.39 4.11 2.57 6.07 5.51 2.07 1.49 3.74 5.18 38.90 1969 1.17 3.44 6.03 .98 6.94 2.73 7.80 6.80 5.25 .80 1.26 4.60 47.80 1970 3.21 4.26 8.21 1.71 6.86 3.43 6.14 10.66 1.78 2.87 .86 2.90 52.89 1971 2.90 4.72 5.54 4.09 3.14 4.37 8.12 8.58 1.32 2.42 2.47 5.92 53.59 1972 5.74 5.73 3.92 .65 2.78 8.22 4.01 4.18 .87 2.28 3.11 4.37 45.86 1973 4.82 6.17 5.15 10.29 4.95 6.74 4.68 4.61 3.25 .97 1.43 5.09 58.15 1974 4.06 5.05 3.47 3.84 3.42 4.56 6.18 5.71 6.62 .46 1.44 2.94 47.75 1975 7.68 2.72 5.21 8.04 3.42 4.83 8.31 4.62 4.45 2.97 1.36 4.28 57.89 1976 4.22 1.39 3.37 1.32 10.84 4.56 3.37 4.37 4.31 5.68 6.79 4.09 54.31 1977 4.13 2.49 5.47 1.11 2.25 3.79 5.82 6.66 5.20 1.13 4.19 5.11 47.35 1978 6.33 2.89 4.12 3.20 5.39 3.28 5.78 3.91 1.68 .74 4.14 2.99 44.45 1979 6.33 7.49 1.28 4.62 4.02 2.48 7.61 4.11 5.54 .26 3.53 3.46 50.73 1980 4.30 2.14 9.60 5.06 3.54 3.95 3.23 2.91 3.70 3.56 .98 1.19 44.16 1981 1.28 4.33 4.68 2.20 2.12 2.96 4.83 5.75 1.66 3.33 2.33 5.38 40.85 1982 3.93 4.38 2.29 5.35 2.35 5.02 5.65 3.32 4.02 .71 2.63 5.91 45.56 1983 4.82 6.07 7.81 5.75 2.41 4.85 3.10 3.76 4.57 1.38 5.91 6.91 57.34 1984 5.93 4.21 9.55 4.93 4.00 3.30 7.21 3.28 1.57 1.48 2.22 .58 48.26 1985 3.12 3.23 2.66 1.79 3.38 3.99 5.77 8.36 .89 3.93 5.56 4.46 47.14 1986 3.25 8.72 2.53 .46 1.41 4.69 4.43 7.36 1.84 1.75 5.68 6.04 48.16 1987 9.16 6.02 5.41 .46 3.25 6.45 3.60 6.04 3.41 .01 3.30 1.95 49.06 1988 5.06 6.45 5.34 5.44 2.07 2.30 3.43 6.26 7.88 1.63 1.67 1.13 48.66 1989 1.31 2.47 4.07 2.98 2.87 8.42 5.85 4.19 2.02 3.00 2.47 5.65 45.30