Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 1900 26.37 22.87 28.57 43.97 53.07 63.1 69.3 69.7 63.71 52.11 39.81 27.87 46.7 1901 26.06 20.06 33.86 42.06 52.16 61.58 70.18 67.98 57.4 44.9 32.4 26.16 44.57 1902 23.36 22.36 36.46 43.46 53.36 60.87 67.17 62.77 56.59 47.89 42.29 26.96 45.29 1903 25.05 28.05 40.15 44.05 54.15 58.46 66.36 63.36 56.67 48.07 31.87 23.65 44.99 1904 18.54 18.44 32.24 39.54 54.54 61.15 65.35 63.55 57.56 42.76 34.16 22.74 42.55 1905 21.63 17.93 34.43 43.23 54.43 61.54 67.14 64.74 57.95 46.65 34.95 29.33 44.49 1906 31.22 23.92 29.62 44.22 53.12 63.43 66.23 68.23 61.84 46.64 37.54 26.92 46.08 1907 26.81 19.31 35.81 37.51 48.41 56.62 66.22 63.42 59.43 41.23 36.83 30.61 43.52 1908 25.6 22.3 36.64 43.94 54.74 61.93 67.93 63.73 56.77 48.57 35.57 28.9 45.55 1909 26.89 32.09 32.03 42.83 53.03 63.92 64.62 63.02 56.75 43.15 39.95 24.89 45.27 1910 25.46 25.26 38.7 47 51.9 60.08 67.68 64.28 60.61 48.81 33.51 22.66 45.5 1911 28.43 27.73 29.97 40.57 56.67 61.65 67.45 65.65 59.68 47.98 33.38 33.03 46.02 1912 16.1 22.1 30.74 43.44 53.84 60.21 65.41 63.61 60.44 48.44 37.64 31.3 44.44 1913 32.87 26.07 37.32 45.32 53.12 61.87 66.87 63.87 57.4 49.7 38.3 32.77 47.12 1914 27.84 20.94 29.59 41.69 56.19 62.54 65.54 65.54 54.46 50.76 34.96 25.84 44.66 1915 27.51 29.51 29.56 46.86 51.46 59.5 65.7 63.8 60.12 49.02 35.92 27.31 45.52 1916 29.19 24.09 27.53 41.73 56.23 58.76 67.56 65.86 55.39 45.19 36.59 27.79 44.66 1917 26.16 21.46 32.8 42.4 48.6 61.33 66.93 65.33 53.75 40.55 33.55 20.06 42.74 1918 15.93 23.93 34.78 42.48 57.08 59.09 63.89 66.59 52.92 48.82 36.52 33.43 44.62 1919 28 29 35.25 41.55 53.95 62.26 67.26 63.06 57.98 52.08 36.38 23.2 45.83 1920 19.39 23.89 32.54 41.94 49.84 60.15 64.35 64.75 58.57 50.17 37.97 31.59 44.6 1921 27.58 29.88 42.13 46.93 52.33 62.33 69.13 62.93 63.75 45.15 38.25 27.98 47.37 1922 23.37 28.77 34.82 44.82 55.82 64.12 65.92 62.62 58.94 48.34 38.04 28.57 46.18 1923 27.86 23.36 31.31 41.91 51.61 63.91 65.41 63.11 60.03 45.23 36.23 36.06 45.5 1924 23.95 26.15 33.2 41.2 50 59.89 64.79 64.29 54.21 46.51 35.91 27.15 43.94 1925 23.44 31.54 34.89 44.09 48.19 65.88 65.28 62.58 62.2 42.7 35 28.84 45.39 1926 24.43 26.43 29.28 39.58 51.48 57.67 65.87 65.97 58.69 46.49 34.69 24.93 43.79 1927 24.52 32.62 36.97 40.17 52.47 56.95 65.45 60.05 57.77 49.37 40.07 29.72 45.51 1928 25.21 27.31 33.06 40.36 51.56 60.34 67.14 66.44 55.36 48.46 39.06 31.21 45.46 1929 24.7 25.6 37.95 45.15 52.15 60.43 64.83 62.23 58.35 43.65 38.45 29 45.2 1930 26.39 30.79 33.34 41.44 55.74 63.52 68.02 65.02 63.74 45.64 37.24 28.49 46.61 1931 28.38 29.48 33.33 42.63 54.23 62.51 69.21 66.21 62.53 50.63 43.83 35.68 48.22 1932 37.77 32.07 29.62 40.52 52.52 61.2 66 66.1 59.02 47.42 34.52 30.87 46.47 1933 33.47 27.27 33.22 43.42 56.32 63.09 65.49 65.99 61.81 45.11 34.71 27.87 46.48 1934 29.06 13.26 28.91 42.21 55.41 65.78 69.48 63.58 61.2 45 39.2 28.26 45.11 1935 23.35 24.55 37.5 42.5 51.3 61.27 67.97 65.77 55.99 45.89 40.99 24.65 45.14 1936 21.84 19.94 38.19 40.29 55.19 61.26 66.26 66.16 60.38 48.08 34.18 31.14 45.24 1937 34.24 26.74 31.59 42.49 54.19 63.05 66.75 67.15 54.87 44.77 36.27 28.84 45.91 1938 26.83 30.13 36.48 44.98 52.58 60.84 67.04 67.74 57.26 46.76 38.06 30.43 46.59 1939 28.42 31.12 34.07 42.07 56.27 63.63 66.13 69.13 59.25 47.65 36.35 31.82 47.16 1940 16.95 27.95 30.01 39.51 53.01 62.95 65.65 63.35 55.46 44.36 37.76 33.25 44.18 1941 25.89 24.29 28.84 47.94 54.34 61.07 66.87 64.07 59.78 52.38 39.28 32.79 46.46 1942 25.53 24.33 36.18 45.58 57.48 62.89 67.59 64.49 58.4 49.4 37.1 25.83 46.23 1943 26.07 27.77 31.92 37.92 55.42 67.81 66.51 66.01 55.22 44.72 35.02 26.57 45.08 1944 28.31 28.31 31.16 41.56 58.16 61.84 66.34 64.74 59.64 45.44 37.44 25.31 45.69 1945 21.25 28.85 42.81 45.91 51.61 61.96 65.76 63.16 61.17 45.97 37.97 25.05 45.96 1946 26.99 27.59 40.95 43.05 53.95 58.89 64.39 61.29 57.89 48.99 40.79 31.29 46.34 1947 30.94 20.84 30.1 42.9 51.7 59.42 64.32 66.62 57.92 52.02 36.32 27.74 45.07 1948 19.98 25.38 35.34 43.04 53.44 60.95 66.85 64.15 57.35 45.55 41.85 31.28 45.43 1949 32.23 33.33 35.09 43.29 53.49 63.59 69.39 66.59 54.58 52.68 36.58 31.43 47.69 1950 35.18 27.88 29.24 39.34 51.94 61.02 65.02 64.02 55.82 49.22 36.42 26.58 45.14 1951 27.63 26.93 33.89 43.19 52.39 61.06 66.36 64.26 57.65 49.65 32.15 30.63 45.48 1952 29.88 31.48 32.54 45.84 52.64 63.49 68.59 64.89 57.38 42.68 38.78 31.48 46.64 1953 31.73 31.03 36.09 42.99 56.39 60.73 65.63 64.03 57.12 48.02 37.12 32.63 46.96 1954 25.48 32.58 33.24 46.94 52.54 62.27 66.87 64.47 60.96 50.36 35.76 27.38 46.57 1955 24.53 25.73 34.3 46.1 55.2 58.51 70.71 66.91 57.5 46.2 31.5 23.63 45.07 1956 26.18 30.28 31.85 41.65 50.15 62.65 66.05 66.05 56.23 49.73 37.03 35.28 46.1 1957 22.13 30.83 35.9 46.3 55.1 65.09 67.39 64.49 60.97 45.07 39.07 31.43 46.98 1958 25.19 21.09 32.86 44.56 52.66 58.13 66.93 62.93 56.42 46.22 38.12 21.79 43.91 1959 22.54 25.54 32.11 46.21 57.71 63.18 67.78 68.18 60.76 50.26 33.56 31.84 46.64 1960 28.32 27.32 24.89 47.39 52.49 62.14 64.84 66.84 59.92 47.12 37.82 20.22 44.94 1961 20.69 28.69 35.17 40.27 50.47 60.11 67.41 65.81 63.49 47.29 38.59 26.89 45.41 1962 23.17 23.17 32.14 43.54 56.14 62.68 62.98 64.48 54.56 47.76 34.46 23.57 44.06 1963 20.95 18.55 35.22 44.52 51.82 61.05 66.45 63.35 53.53 48.03 39.33 22.65 43.79 1964 26.32 25.42 33.59 41.19 55.59 62.52 67.02 63.52 57 44.1 39.3 30.82 45.53 1965 22.9 24.6 31.67 42.17 57.97 62.29 65.89 64.09 60.47 44.47 37.77 31.7 45.5 1966 22.67 26.07 34.35 40.85 52.05 62.66 68.76 66.86 57.74 44.84 37.54 28.67 45.25 1967 30.25 21.85 32.02 42.92 48.22 62.43 66.93 64.73 55.71 45.81 32.71 30.55 44.51 1968 21.33 22.93 37 45.7 51.7 62 69.4 68.4 60.98 50.48 39.28 27.23 46.37 1969 24.6 27.8 31.28 47.08 56.98 64.87 67.47 65.27 58.55 45.55 36.45 27.4 46.11 1970 19.29 24.89 31.07 43.07 55.77 62.26 66.76 66.86 61.63 50.83 38.53 29.39 45.86 1971 20.88 27.68 31.26 40.46 50.86 62.65 65.55 63.85 62.52 52.62 35.42 34.28 45.67 1972 28.27 23.57 30.85 39.75 53.15 58.44 67.24 64.34 58.61 42.61 35.01 32.97 44.57 1973 26.97 25.07 38.94 44.14 51.14 64.73 66.73 67.53 59.7 48.4 37.5 30.67 46.79 1974 30.26 25.96 35.43 45.93 53.23 60.11 66.71 63.81 54.49 41.09 35.49 29.66 45.18 1975 27.65 28.35 31.82 40.02 56.92 62.9 65.8 66.6 56.27 49.57 40.97 28.95 46.32 1976 23.34 32.84 38.11 45.11 51.71 64.09 65.59 64.39 57.46 43.26 31.66 24.34 45.16 1977 16.33 26.63 39.01 46.21 55.61 60.08 67.48 67.18 61.35 44.75 40.05 27.83 46.04 1978 22.02 21.32 32.4 44.1 53.9 62.77 66.47 67.17 57.24 43.44 37.94 30.32 44.92 1979 25.41 18.21 37.69 43.29 54.99 59.66 65.76 65.26 59.63 45.93 41.63 32.11 45.79 1980 26.39 23.29 32.97 45.67 55.17 59.04 67.34 68.24 60.61 43.81 33.61 24.59 45.06 1981 22.38 28.48 32.86 46.76 53.46 64.62 67.32 63.82 56.49 42.99 36.99 27.98 45.34 1982 17.06 26.26 32.84 40.04 56.24 60.6 68.3 62.3 58.27 46.77 38.57 33.96 45.1 1983 27.35 26.85 36.23 42.73 51.43 61.98 68.08 67.38 58.35 47.25 37.25 25.55 45.87 1984 20.43 31.93 31.01 43.91 52.21 63.26 63.36 63.96 52.83 51.13 31.23 33.13 44.87 1985 19.72 27.62 37.2 47.1 54.7 60.04 65.84 64.74 57.41 46.61 40.81 24.92 45.56 1986 24.2 26.3 34.18 45.08 56.98 62.62 68.52 62.92 57.49 48.49 33.39 29.5 45.81 1987 26.59 27.49 36.57 45.07 56.67 65.4 69.3 65.2 58.37 40.37 35.57 29.49 46.34 1988 19.17 25.47 33.65 40.15 53.65 62.49 69.29 68.99 56.15 41.85 36.85 25.97 44.48 1989 28.06 25.36 33.34 44.94 54.24 65.17 67.07 65.87 58.43 46.93 35.53 17.26 45.18 1990 33.85 32.15 37.23 45.33 52.43 62.05 67.45 65.15 57.51 49.71 36.11 29.65 47.38 1991 26.87 31.35 37.6 46.21 60.17 62.86 68.85 66.5 56.86 46.68 35.7 30.74 47.53 1992 27.46 29.91 34.12 43.73 49.81 60.08 67.16 61.99 58.24 43.54 37.76 30.85 45.39 1993 29.31 23.79 32.7 43.29 55 62.01 69.12 65.98 59.3 46.39 35.16 27.67 45.81 1994 19.28 24.88 33.39 47.79 49.01 65.8 69.9 63 55.9 42.52 38.8 31.45 45.14