YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.83 | 63.61 | 69.22 | j | ||
1921 | 68.84 | 75.86 | 78.76 | b | 82.52 | c | 88.52 | 98.17 | 100.13 | 95.87 | 92.62 | a | 88.10 | a | 78.27 | ----- | z | 86.15 | a | |||||||
1922 | 68.54 | g | 69.48 | a | 71.81 | ----- | z | 91.48 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.59 | i | ||
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 103.89 | u | 100.90 | 98.81 | 93.67 | 83.65 | 71.17 | 61.35 | 84.92 | f | ||||||
1924 | 65.45 | 74.59 | 69.61 | 79.17 | 95.06 | 104.87 | 103.39 | 104.10 | 99.60 | 87.43 | a | 80.07 | 64.29 | 85.64 | ||||||||||||
1925 | 67.68 | 76.32 | 80.87 | 85.97 | 96.03 | a | 99.73 | 106.35 | 102.32 | 97.50 | 83.58 | 75.17 | 68.97 | 86.71 | ||||||||||||
1926 | 66.47 | a | 75.93 | a | 79.35 | 82.03 | 92.81 | 105.10 | 104.87 | 104.61 | 99.17 | a | 91.71 | 81.23 | 65.45 | 87.39 | ||||||||||
1927 | 74.26 | 72.93 | 75.71 | 84.63 | 95.48 | 101.00 | 107.23 | 103.94 | 99.50 | 93.06 | 83.63 | 66.61 | 88.17 | |||||||||||||
1928 | 71.90 | a | 69.36 | a | 78.48 | 83.69 | a | 93.52 | 100.17 | a | 104.84 | 101.04 | c | 99.30 | 87.61 | 74.43 | 66.52 | 85.90 | ||||||||
1929 | 64.48 | 67.57 | 75.16 | 82.00 | b | 93.39 | 102.10 | a | 101.42 | 101.16 | 96.97 | 90.03 | 75.86 | a | 74.97 | 85.43 | ||||||||||
1930 | 63.32 | 77.11 | 75.72 | b | 88.07 | 86.86 | b | 102.80 | 101.81 | 101.32 | 96.90 | 87.80 | a | 75.40 | 69.42 | 85.54 | ||||||||||
1931 | 69.03 | 68.79 | 77.17 | a | 85.47 | 95.10 | 98.37 | 104.42 | 98.61 | 97.60 | 88.17 | a | 69.69 | a | 64.29 | 84.72 | ||||||||||
1932 | 60.77 | a | 68.59 | 75.52 | 84.97 | a | 90.77 | a | 98.03 | 101.56 | o | 104.21 | b | 100.17 | a | 85.52 | 81.03 | 60.97 | 82.78 | a | ||||||
1933 | 62.39 | 65.00 | 77.35 | 78.83 | a | 86.68 | 101.67 | 105.61 | 104.37 | a | 99.50 | 91.39 | 80.43 | 70.48 | 85.31 | |||||||||||
1934 | 70.03 | 75.07 | a | 85.48 | 90.11 | b | 97.71 | 97.83 | 104.58 | 99.29 | 98.10 | 92.19 | 76.43 | 69.06 | 87.99 | |||||||||||
1935 | 65.58 | 70.46 | 70.42 | 82.43 | 88.03 | b | 104.21 | a | 104.48 | 98.71 | 97.00 | 88.87 | 71.93 | 67.84 | 84.16 | |||||||||||
1936 | 67.94 | 68.48 | 79.68 | 88.27 | 96.19 | 103.57 | 103.48 | 102.39 | 96.57 | 87.47 | a | 76.20 | 66.32 | 86.38 | ||||||||||||
1937 | 55.47 | a | 68.50 | 73.29 | 84.52 | a | 94.81 | 101.00 | 104.45 | 104.77 | 99.56 | c | 92.16 | 80.00 | 71.29 | 85.82 | ||||||||||
1938 | 70.39 | 69.81 | a | 73.32 | 85.97 | a | 92.16 | 100.96 | b | 103.45 | 102.19 | 101.23 | 88.53 | a | 73.60 | 70.13 | 85.98 | |||||||||
1939 | 65.87 | 62.07 | a | 78.77 | 88.07 | b | 96.06 | 102.50 | 105.65 | 102.87 | 94.86 | a | 88.74 | 78.93 | a | 74.63 | a | 86.59 | ||||||||
1940 | 70.19 | 71.24 | 82.25 | c | 86.79 | a | 98.58 | 105.07 | a | 107.39 | 105.26 | 99.39 | b | 88.68 | 73.87 | 68.58 | 88.11 | |||||||||
1941 | 67.07 | a | 70.46 | 73.57 | a | 76.73 | 92.53 | a | 99.43 | 103.47 | a | 100.52 | 96.00 | 82.32 | 78.70 | 66.77 | 83.96 | |||||||||
1942 | 67.97 | a | 67.96 | 76.40 | a | 81.67 | 92.23 | 101.97 | 105.32 | 100.45 | 99.83 | 86.32 | 79.83 | 71.62 | b | 85.96 | ||||||||||
1943 | 67.03 | 75.86 | 79.03 | 89.17 | 95.23 | a | 98.93 | a | 104.90 | 100.72 | b | 100.00 | 87.97 | 79.60 | 66.93 | a | 87.12 | |||||||||
1944 | 67.06 | 65.86 | a | 73.79 | b | 80.10 | 91.68 | 98.50 | 104.87 | 104.61 | 98.67 | 92.03 | 72.70 | 69.29 | 84.93 | |||||||||||
1945 | 67.10 | a | 72.61 | 72.97 | a | 84.43 | 94.52 | 101.07 | 105.55 | 104.03 | 101.43 | 91.39 | 79.13 | 67.42 | 86.80 | |||||||||||
1946 | 65.84 | 73.14 | 81.20 | a | 91.93 | 94.77 | 106.83 | 104.84 | 104.65 | 100.90 | 84.48 | 72.23 | 72.07 | a | 87.74 | |||||||||||
1947 | 67.10 | 78.39 | 81.16 | 87.07 | a | 97.42 | 102.17 | 109.35 | 103.61 | 105.30 | 92.26 | 73.20 | 66.23 | 88.60 | ||||||||||||
1948 | 72.39 | 69.81 | c | 71.16 | 86.48 | a | 94.13 | a | 100.92 | f | 104.58 | 103.81 | 100.27 | 89.52 | 74.93 | 65.61 | 84.79 | a | ||||||||
1949 | 55.19 | 67.68 | 75.48 | b | 86.43 | 91.68 | 99.67 | 102.45 | 101.87 | 99.33 | 84.81 | 83.48 | a | 67.84 | 84.66 | |||||||||||
1950 | 66.67 | a | 75.46 | 78.77 | 88.57 | 91.19 | 100.60 | 100.16 | 103.32 | 95.83 | 95.40 | a | 82.57 | 76.48 | 87.92 | |||||||||||
1951 | 68.35 | 71.00 | 75.90 | 82.87 | 92.71 | 99.33 | 104.84 | 99.60 | a | 99.60 | 88.90 | a | 74.90 | 65.71 | 85.31 | |||||||||||
1952 | 66.13 | 70.21 | 68.96 | g | 81.63 | 95.61 | 100.57 | 101.74 | 101.71 | 100.23 | 95.48 | b | 71.40 | 65.74 | 86.41 | a | ||||||||||
1953 | 72.32 | 70.86 | 78.26 | 81.90 | 86.77 | a | 105.60 | 106.16 | 106.30 | a | 105.53 | 91.13 | 79.10 | 67.00 | 87.58 | |||||||||||
1954 | 69.29 | 80.11 | 75.19 | 92.60 | 97.97 | 103.80 | 105.52 | b | 103.60 | a | 102.03 | 93.26 | 82.93 | 69.97 | 89.69 | |||||||||||
1955 | 59.05 | i | 68.46 | 79.18 | i | 85.97 | 93.35 | 102.27 | 102.03 | 100.40 | a | 102.37 | 94.81 | 76.47 | 72.94 | 89.91 | b | |||||||||
1956 | 71.81 | 67.03 | 82.87 | 86.93 | a | 98.39 | 107.50 | 106.30 | a | 105.38 | j | 104.77 | 89.97 | 77.93 | 71.35 | 87.71 | a | |||||||||
1957 | 64.94 | 77.21 | 78.39 | 85.66 | a | 90.68 | 106.53 | 107.68 | 104.87 | a | 102.93 | 83.87 | 71.47 | 71.29 | 87.13 | |||||||||||
1958 | 70.23 | 73.50 | 71.06 | 85.57 | 100.71 | 106.60 | 108.42 | 105.60 | a | 99.03 | 89.35 | 76.83 | 75.58 | 88.54 | ||||||||||||
1959 | 71.58 | 69.61 | 81.42 | 90.60 | 93.93 | a | 108.23 | 108.10 | 102.13 | a | 99.84 | k | 89.26 | 76.63 | 65.97 | 87.04 | a | |||||||||
1960 | 62.26 | 66.97 | 81.90 | 88.47 | 95.81 | 108.43 | 108.87 | 104.55 | 103.10 | 84.84 | 78.46 | b | 68.10 | 87.65 | ||||||||||||
1961 | 71.45 | 75.54 | 78.73 | a | 88.83 | 95.33 | a | 106.17 | 105.84 | 101.93 | b | 95.57 | 88.52 | 73.13 | 66.26 | 87.27 | ||||||||||
1962 | 66.16 | 70.75 | 73.55 | 91.03 | 91.23 | 100.83 | a | 104.61 | 106.55 | 98.47 | 90.77 | 80.73 | 71.23 | 87.16 | ||||||||||||
1963 | 65.23 | 78.11 | 77.48 | 82.23 | ----- | z | ----- | z | 105.68 | 99.10 | 100.13 | 90.55 | 75.03 | 69.29 | 84.28 | b | ||||||||||
1964 | 63.97 | 66.83 | 71.39 | 81.50 | 91.74 | 100.47 | 104.87 | 99.90 | 95.60 | 91.39 | 70.83 | 66.16 | 83.72 | |||||||||||||
1965 | 66.90 | 68.57 | 71.68 | 80.00 | 88.32 | 95.13 | 103.58 | 103.10 | 94.43 | 91.83 | a | 76.57 | 65.13 | 83.77 | ||||||||||||
1966 | 62.45 | 64.21 | 78.35 | 86.80 | 95.84 | 102.83 | 105.74 | 103.74 | 96.50 | 87.94 | 76.97 | 67.57 | a | 85.75 | ||||||||||||
1967 | 67.45 | 73.50 | 77.97 | 76.73 | 91.10 | 96.57 | 104.06 | 103.84 | 98.07 | 91.00 | 79.47 | 61.03 | 85.07 | |||||||||||||
1968 | 66.42 | 72.97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 69.69 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 66.90 | 71.27 | 76.74 | 85.01 | 93.42 | 102.03 | 104.76 | 102.45 | 99.00 | 89.22 | 76.75 | 68.16 | 86.38 | |||||||||||||
S.D. | 3.92 | 4.10 | 3.77 | 3.86 | 3.30 | 3.25 | 2.16 | 2.36 | 2.91 | 3.18 | 3.63 | 3.61 | 1.49 | |||||||||||||
SKEW | -0.90 | 0.14 | 0.02 | -0.18 | -0.24 | 0.20 | -0.13 | -0.54 | 0.16 | -0.17 | 0.02 | 0.25 | 0.03 | |||||||||||||
MAX | 74.26 | 80.11 | 85.48 | 92.60 | 100.71 | 108.43 | 109.35 | 106.55 | 105.53 | 95.48 | 83.63 | 76.48 | 89.69 | |||||||||||||
MIN | 55.19 | 62.07 | 69.61 | 76.73 | 86.68 | 95.13 | 100.13 | 95.87 | 92.62 | 82.32 | 69.69 | 60.97 | 83.72 | |||||||||||||
YRS | 45 | 47 | 44 | 45 | 45 | 43 | 45 | 45 | 45 | 46 | 47 | 46 | 37 |