YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1922 | ----- | z | ----- | z | 82.79 | q | 83.53 | 99.17 | a | 109.13 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 97.28 | i | ||
1923 | 61.22 | v | ----- | z | ----- | z | 87.42 | f | 99.20 | f | 99.83 | 104.64 | c | 102.86 | b | 97.50 | 87.20 | a | 74.23 | d | ----- | z | 94.38 | f | ||
1924 | 66.48 | 77.14 | 75.48 | ----- | z | 97.19 | ----- | z | 106.95 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 79.07 | h | ||||
1925 | ----- | z | ----- | z | 82.67 | j | 86.83 | 95.71 | 99.87 | 106.58 | 104.23 | 99.62 | a | 82.67 | d | 73.48 | a | 68.81 | 90.87 | c | ||||||
1926 | 66.65 | 76.39 | 81.66 | b | 86.03 | 93.19 | 104.27 | 106.07 | a | 104.93 | a | 99.57 | 91.94 | 80.97 | a | 64.68 | 88.03 | |||||||||
1927 | 71.61 | 75.25 | 77.21 | b | 85.90 | 94.68 | 100.40 | 105.52 | 103.61 | 97.87 | 89.52 | 78.10 | 65.10 | 87.06 | ||||||||||||
1928 | 71.27 | a | 71.97 | 79.42 | 84.47 | 92.90 | 100.15 | c | 105.13 | a | 103.85 | d | 101.40 | 89.26 | 75.70 | 67.24 | b | 86.90 | ||||||||
1929 | 65.42 | g | 69.78 | a | 77.76 | b | 82.00 | d | 93.80 | a | 101.07 | a | 104.48 | 104.03 | a | 98.82 | b | 92.03 | 77.33 | 74.74 | 88.71 | a | ||||
1930 | 65.30 | a | 78.74 | a | 75.55 | 82.00 | d | 82.89 | d | 99.04 | d | 102.74 | d | 106.79 | c | 100.75 | b | 90.10 | 79.41 | a | 69.61 | 86.08 | ||||
1931 | 71.03 | 71.41 | a | 83.20 | a | 89.93 | 98.28 | b | 102.30 | 109.39 | 104.07 | d | 101.19 | c | 91.20 | a | 73.24 | a | 65.37 | a | 88.38 | |||||
1932 | 65.40 | a | 70.70 | b | 80.54 | c | 88.09 | g | 95.04 | c | 103.93 | a | 106.83 | b | 108.23 | a | 105.90 | a | 89.44 | d | 82.54 | b | ----- | z | 90.85 | b |
1933 | 64.33 | a | 67.79 | 82.13 | 83.28 | a | 89.62 | b | 104.89 | b | 110.09 | i | 109.85 | e | 104.33 | 96.96 | d | 83.92 | e | 73.56 | d | 87.33 | a | |||
1934 | 74.57 | c | 79.27 | b | 91.62 | b | 94.54 | b | 101.00 | d | 94.55 | s | 108.91 | i | 105.52 | b | 101.86 | b | 93.45 | 78.19 | d | 71.11 | c | 89.11 | b | |
1935 | 69.00 | d | 72.77 | b | 75.89 | d | 87.46 | d | 90.93 | d | 107.42 | d | 106.63 | a | 104.81 | j | 102.20 | e | 92.21 | c | 74.58 | f | 71.04 | f | 89.39 | c |
1936 | 70.70 | d | 74.44 | d | 84.30 | h | 94.75 | f | 100.33 | d | 106.68 | b | 109.21 | b | 107.45 | 102.14 | a | 92.96 | e | 80.52 | c | 71.00 | d | 91.54 | b | |
1937 | 59.10 | a | 73.48 | a | 79.52 | b | 88.03 | a | 96.28 | b | 104.18 | b | 109.12 | e | 108.50 | a | 104.50 | 95.70 | d | 81.65 | g | 73.72 | b | 90.19 | a | |
1938 | 72.15 | d | 72.12 | b | 77.59 | d | 88.53 | 96.38 | e | 103.17 | a | 107.23 | 105.74 | 104.00 | c | 89.59 | d | 75.07 | b | 69.61 | c | 88.43 | ||||
1939 | 67.10 | 65.27 | b | 80.93 | c | 93.43 | g | 96.89 | c | 103.93 | b | 109.04 | d | 107.63 | d | 95.04 | c | 86.89 | d | 78.17 | a | 73.50 | a | 87.67 | a | |
1940 | 71.33 | a | 73.35 | c | 83.90 | b | 89.60 | e | 101.39 | c | 107.10 | 110.26 | 108.07 | a | 100.86 | a | 90.13 | a | 75.93 | a | 70.63 | a | 90.21 | |||
1941 | 66.87 | a | 73.81 | a | 76.93 | a | 80.66 | a | 96.31 | b | 101.25 | b | 108.94 | 105.50 | e | 99.67 | c | 86.68 | c | 79.68 | b | 69.59 | b | 87.16 | ||
1942 | 69.57 | c | 70.62 | b | 78.55 | b | 83.79 | b | 94.97 | b | 104.07 | c | 111.13 | a | 106.59 | d | 103.89 | b | 91.45 | b | 81.63 | c | 74.32 | l | 90.57 | a |
1943 | 70.96 | f | 76.96 | b | 83.82 | c | 92.19 | d | 97.59 | b | 102.03 | a | 110.24 | b | 104.24 | b | 105.25 | b | 92.73 | a | 80.38 | a | 68.19 | 92.15 | a | |
1944 | 68.87 | a | 67.39 | a | 78.11 | c | 84.31 | d | 93.46 | c | 98.67 | 107.63 | a | 109.15 | d | 101.70 | c | 92.80 | a | 71.27 | d | 69.42 | 86.90 | |||
1945 | 66.14 | c | 72.63 | i | 73.39 | c | 89.12 | m | 95.00 | x | 101.67 | f | 108.50 | e | 105.58 | 103.04 | d | 91.69 | b | 78.75 | j | 67.54 | c | 87.98 | e | |
1946 | 70.39 | h | 73.29 | 80.26 | d | 92.00 | c | 96.17 | h | 106.08 | d | 106.82 | c | 107.17 | h | 102.23 | 84.87 | 73.39 | b | 71.44 | d | 87.82 | c | |||
1947 | 68.13 | 79.71 | 80.63 | a | 89.43 | 97.42 | 101.27 | 110.34 | b | 103.94 | 104.00 | a | 91.93 | d | 79.50 | 67.93 | a | 89.52 | ||||||||
1948 | 78.07 | b | 74.74 | b | 76.39 | 88.77 | 95.65 | 101.57 | 106.61 | 106.93 | a | 103.31 | d | 89.37 | a | 74.87 | 66.20 | a | 88.54 | |||||||
1949 | 56.80 | a | 70.42 | b | 79.69 | b | 91.18 | b | 93.23 | 103.61 | b | 105.00 | m | 106.68 | l | ----- | z | ----- | z | ----- | z | ----- | z | 82.49 | f | |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.83 | 66.16 | 71.00 | j | ||
1952 | 65.26 | 71.62 | 72.41 | b | 84.63 | c | 100.65 | 101.60 | 108.16 | 106.84 | 104.07 | 99.77 | a | 73.73 | 65.77 | 87.88 | ||||||||||
1953 | 73.63 | a | 73.00 | 79.52 | 83.60 | 87.71 | 101.67 | 104.77 | a | 103.87 | 102.57 | 89.65 | 79.53 | 68.55 | 87.34 | |||||||||||
1954 | 69.26 | 79.46 | 74.80 | a | 89.50 | 95.81 | 101.00 | 106.27 | a | 101.19 | 100.29 | b | 92.65 | 81.07 | 69.72 | b | 88.42 | |||||||||
1955 | 60.87 | 67.82 | 78.74 | 82.07 | 88.61 | 99.17 | 100.97 | 100.52 | 100.67 | 93.58 | 76.07 | b | 71.45 | 85.04 | ||||||||||||
1956 | 70.48 | b | 68.24 | 81.80 | a | 81.97 | 92.94 | 101.53 | 102.43 | c | 102.43 | h | 104.13 | 87.93 | c | 77.13 | 70.39 | 85.36 | a | |||||||
1957 | 64.94 | 76.64 | 78.18 | c | 82.97 | 86.68 | 102.07 | c | 105.56 | d | 101.29 | g | 99.73 | 83.97 | 70.57 | 69.87 | 83.74 | a | ||||||||
1958 | 70.13 | 73.57 | 72.21 | b | 85.50 | 98.39 | 100.04 | b | 104.13 | 102.00 | e | 97.83 | a | 90.93 | b | 77.27 | 74.26 | 87.19 | ||||||||
1959 | 72.32 | 70.82 | 81.81 | 90.79 | b | 89.87 | 103.07 | b | 104.03 | 99.23 | a | 94.25 | f | 89.84 | 78.60 | 66.19 | 86.05 | a | ||||||||
1960 | 62.93 | a | 69.31 | 82.50 | c | 88.29 | b | 94.19 | 105.50 | 105.31 | b | 101.97 | 99.80 | 87.23 | 76.80 | 67.65 | 86.79 | |||||||||
1961 | 71.61 | 75.07 | 78.90 | b | 88.33 | 92.76 | b | 103.10 | a | 102.62 | b | 100.43 | a | 95.23 | 87.77 | 72.00 | d | 65.45 | 86.11 | |||||||
1962 | 67.77 | 70.89 | 73.68 | 92.10 | 91.67 | d | 99.33 | c | 103.25 | c | 105.74 | d | 98.37 | 90.42 | 80.30 | 70.52 | 87.00 | |||||||||
1963 | 64.81 | 80.39 | 76.89 | c | 81.34 | a | 96.19 | 96.23 | d | 103.06 | 100.30 | a | 100.19 | d | 89.41 | b | 76.47 | 70.59 | b | 86.32 | ||||||
1964 | 65.18 | c | 68.86 | a | 74.77 | 83.68 | b | 90.79 | c | 99.27 | d | 103.81 | 100.07 | b | 97.37 | 92.84 | 71.18 | b | 68.10 | 84.66 | ||||||
1965 | 68.48 | 71.75 | 73.65 | e | 83.53 | 89.59 | b | 95.18 | b | 105.16 | 106.35 | 96.97 | 94.03 | 77.03 | 64.03 | 85.48 | ||||||||||
1966 | 63.55 | 66.69 | b | 80.94 | 88.46 | b | 95.80 | a | 101.73 | 105.48 | h | 105.39 | c | 99.23 | 89.39 | 78.53 | 69.26 | 85.36 | a | |||||||
1967 | 68.07 | b | 75.77 | b | 79.39 | 77.07 | 91.97 | 97.83 | 105.07 | b | 105.61 | 96.20 | 91.57 | c | 80.50 | b | 62.71 | 85.98 | ||||||||
1968 | 68.65 | 76.48 | 78.45 | 83.44 | e | 94.03 | 103.30 | 103.94 | 101.79 | b | 101.36 | b | 90.41 | b | 76.62 | f | 65.52 | 87.94 | a | |||||||
1969 | 70.10 | 69.88 | b | 78.29 | c | 86.12 | d | 96.07 | b | 96.80 | j | 105.61 | 109.36 | c | 102.19 | c | 86.30 | d | 75.07 | b | 67.58 | 86.05 | a | |||
1970 | 68.16 | 74.60 | h | 76.03 | b | 81.69 | a | 95.52 | d | 101.83 | 107.78 | d | 105.58 | e | 99.07 | 88.04 | f | 77.96 | c | 66.65 | 88.03 | b | ||||
1971 | 69.03 | 73.18 | 80.77 | 81.00 | d | 86.61 | 100.00 | e | 105.03 | 100.97 | 104.18 | h | 83.21 | c | 74.93 | c | 61.48 | f | 85.47 | b | ||||||
1972 | 67.84 | 77.17 | 86.68 | c | 85.83 | 91.32 | c | 99.77 | 107.59 | d | 101.58 | e | 97.64 | e | 81.59 | b | 71.72 | a | 64.62 | b | 86.11 | |||||
1973 | 65.13 | 69.58 | b | 70.58 | 82.32 | e | 93.35 | e | 102.20 | 105.33 | d | 104.03 | 98.76 | i | 91.23 | 75.73 | 70.94 | 84.58 | a | |||||||
1974 | 66.74 | 73.00 | 78.38 | b | 84.23 | 91.74 | 103.30 | 101.52 | 104.45 | 99.37 | 87.68 | 76.67 | 65.23 | 86.03 | ||||||||||||
1975 | 68.61 | 70.68 | 74.45 | 75.93 | 90.13 | 99.77 | 104.06 | 105.16 | 99.40 | 87.65 | 77.20 | 68.68 | 85.14 | |||||||||||||
1976 | 70.26 | 73.69 | 75.87 | 80.00 | d | 93.13 | 101.47 | 103.35 | 102.81 | 92.93 | 86.29 | 78.10 | 69.87 | 85.65 | ||||||||||||
1977 | 67.26 | 78.07 | 74.00 | 88.23 | 86.68 | 103.73 | 105.97 | 102.71 | 98.59 | a | 93.35 | 81.17 | 71.84 | 87.63 | ||||||||||||
1978 | 66.35 | 71.93 | 78.84 | 82.30 | 93.32 | 103.67 | 106.03 | 105.13 | 98.10 | 94.00 | 73.97 | 63.68 | 86.44 | |||||||||||||
1979 | 60.65 | 71.11 | 75.32 | 85.70 | 91.06 | 102.68 | b | 104.81 | 102.10 | 103.97 | 92.52 | 75.60 | 71.52 | d | 86.42 | |||||||||||
1980 | 70.58 | 75.21 | 74.00 | b | 84.53 | 87.26 | 102.07 | 107.66 | b | 105.16 | 101.21 | k | ----- | z | ----- | z | 77.33 | j | 88.31 | d | ||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 67.83 | 73.01 | 78.34 | 85.48 | 93.67 | 102.04 | 106.01 | 104.55 | 100.52 | 90.15 | 76.97 | 68.69 | 86.96 | |||||||||||||
S.D. | 3.87 | 3.63 | 3.85 | 3.95 | 4.03 | 2.70 | 2.42 | 2.62 | 2.88 | 3.53 | 3.15 | 2.96 | 1.31 | |||||||||||||
SKEW | -0.35 | 0.13 | 0.69 | 0.05 | -0.30 | 0.14 | 0.16 | -0.03 | -0.29 | -0.15 | -0.07 | 0.05 | 0.49 | |||||||||||||
MAX | 78.07 | 80.39 | 91.62 | 94.54 | 101.39 | 109.13 | 111.13 | 109.85 | 105.90 | 99.77 | 83.92 | 74.74 | 90.21 | |||||||||||||
MIN | 56.80 | 65.27 | 70.58 | 75.93 | 82.89 | 95.18 | 100.97 | 99.23 | 92.93 | 81.59 | 70.57 | 62.71 | 84.66 | |||||||||||||
YRS | 51 | 52 | 53 | 51 | 54 | 53 | 51 | 50 | 50 | 52 | 50 | 49 | 30 |