YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 106.29 | 104.97 | 101.83 | 88.32 | 71.43 | 61.68 | 89.09 | f | ||||||
1949 | 50.45 | 63.07 | 75.13 | 87.70 | 91.61 | 101.20 | 107.10 | 104.23 | 102.55 | a | 85.58 | 80.63 | 63.35 | 84.38 | ||||||||||||
1950 | 61.42 | 72.46 | 77.48 | 89.00 | 92.26 | 100.40 | 104.81 | 106.00 | 98.00 | 93.16 | 78.77 | 72.00 | 87.15 | |||||||||||||
1951 | 64.10 | 68.18 | 74.48 | 83.47 | 91.16 | 99.40 | 107.06 | 102.68 | 100.17 | 85.29 | 70.97 | 60.35 | 83.94 | |||||||||||||
1952 | 58.77 | 68.00 | 67.71 | 82.47 | 95.81 | 98.07 | 105.52 | 106.74 | 101.20 | 95.42 | 70.53 | 63.71 | 84.50 | |||||||||||||
1953 | 69.52 | 69.96 | 77.52 | 83.73 | 85.06 | 100.47 | 107.13 | 105.13 | 103.27 | 88.35 | 76.33 | 65.00 | 85.96 | |||||||||||||
1954 | 63.26 | 75.96 | 72.26 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.49 | i | |||
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | 67.58 | 70.36 | 69.58 | 82.97 | 98.97 | 103.50 | 108.61 | 108.87 | 100.63 | 89.81 | 72.10 | 69.45 | b | 86.87 | ||||||||||||
1959 | 65.84 | 65.36 | 78.58 | 88.83 | a | 92.00 | b | 105.90 | 110.81 | 104.55 | 97.37 | 87.96 | c | 71.52 | c | 63.50 | a | 86.02 | ||||||||
1960 | 57.40 | a | 62.26 | b | 77.71 | 85.00 | a | 93.21 | b | 107.83 | a | 111.17 | b | 107.52 | 101.86 | b | 85.71 | 71.71 | b | 62.44 | d | 85.32 | ||||
1961 | 65.11 | c | 68.73 | b | 75.35 | 84.83 | a | 92.28 | b | ----- | z | 110.79 | b | 106.42 | e | 96.15 | c | 86.47 | a | 68.63 | c | 59.39 | c | 83.10 | a | |
1962 | 61.30 | a | 68.38 | b | 70.16 | 90.45 | a | 90.55 | b | 102.38 | a | 108.73 | a | 109.89 | c | 101.89 | b | 87.73 | a | 77.92 | d | 66.52 | d | 86.33 | ||
1963 | 59.59 | b | 73.62 | b | 74.48 | 79.63 | 95.67 | a | 97.48 | a | 109.15 | d | 105.30 | a | 100.36 | b | 91.24 | b | 72.87 | g | 63.83 | a | 86.40 | a | ||
1964 | 60.71 | 64.67 | b | 70.07 | a | 79.90 | 89.90 | b | 100.25 | b | 108.24 | b | 105.52 | d | 99.16 | e | 93.70 | d | 68.80 | e | 64.07 | d | 83.75 | |||
1965 | 64.15 | e | 67.38 | d | 71.07 | c | 76.96 | b | 88.20 | f | 96.11 | c | 107.32 | c | 106.92 | f | 94.23 | d | 91.71 | c | 74.69 | d | 60.35 | e | 80.40 | b |
1966 | 60.03 | b | 62.30 | e | 75.78 | d | 86.83 | 97.12 | f | 102.92 | e | 107.92 | f | 108.56 | d | 100.29 | f | 84.96 | d | 74.96 | f | 64.16 | f | 83.06 | e | |
1967 | 62.81 | e | 69.48 | e | 78.35 | e | 75.35 | d | 92.00 | e | 97.88 | d | 109.52 | h | 109.07 | d | 98.00 | d | 91.00 | e | 77.08 | f | 59.24 | f | 85.99 | c |
1968 | 63.04 | e | 71.83 | e | 75.88 | e | 81.31 | d | 92.96 | e | 104.96 | g | 107.00 | e | 101.88 | g | 100.38 | i | 86.59 | d | 73.00 | g | 59.33 | g | 82.66 | e |
1969 | 63.72 | b | 63.72 | c | 71.29 | g | 86.12 | f | 95.22 | h | 100.13 | 109.27 | i | 111.13 | 102.58 | d | 87.24 | j | 76.75 | j | 68.41 | i | 88.26 | g | ||
1970 | 62.79 | c | 70.88 | b | 72.53 | a | 77.86 | a | 93.82 | c | 103.59 | c | 110.00 | c | 106.87 | a | 98.50 | 84.23 | 74.10 | 60.68 | 84.65 | |||||
1971 | 64.68 | 68.68 | 76.00 | 81.37 | 86.87 | 102.57 | b | 110.45 | 105.16 | 99.10 | 81.39 | 70.30 | 59.52 | 83.84 | ||||||||||||
1972 | 62.58 | 72.14 | a | 84.77 | 84.67 | 93.10 | a | 102.66 | a | 111.19 | 105.13 | a | 96.67 | f | 82.59 | i | 67.54 | f | 59.18 | i | 89.53 | d | ||||
1973 | 58.04 | f | 65.91 | e | 68.89 | d | 83.12 | f | 97.48 | f | 104.92 | d | 110.38 | g | 107.56 | d | 98.82 | h | 88.48 | j | 73.17 | f | 66.19 | j | 86.82 | h |
1974 | 56.96 | e | 66.59 | f | 77.04 | e | 82.40 | e | 94.48 | f | 109.23 | 107.06 | 106.23 | a | 100.86 | b | 89.03 | a | 71.10 | 60.67 | a | 86.06 | b | |||
1975 | 62.13 | 64.64 | 70.94 | 74.77 | 90.10 | 101.77 | 108.68 | 107.48 | 101.63 | 86.06 | 71.62 | a | 64.23 | 83.67 | ||||||||||||
1976 | 64.00 | 69.10 | 71.68 | 79.57 | 94.77 | 101.63 | 107.06 | 104.65 | 93.37 | 82.65 | 73.27 | 62.97 | 83.73 | |||||||||||||
1977 | 59.52 | 70.46 | 69.90 | 86.07 | 84.42 | 105.40 | 107.00 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 79.29 | f | ||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 62.06 | 68.30 | 74.13 | 82.83 | 91.83 | 101.99 | 108.29 | 106.51 | 99.65 | 88.02 | 73.02 | 63.35 | 85.01 | |||||||||||||
S.D. | 3.81 | 3.62 | 3.97 | 4.32 | 3.51 | 3.27 | 1.90 | 2.03 | 2.72 | 3.62 | 3.41 | 3.27 | 1.24 | |||||||||||||
SKEW | -0.89 | 0.00 | 0.50 | -0.14 | -0.41 | 0.34 | 0.09 | 0.47 | -0.84 | 0.26 | 0.86 | 1.13 | 0.45 | |||||||||||||
MAX | 69.52 | 75.96 | 84.77 | 90.45 | 98.97 | 109.23 | 111.19 | 111.13 | 103.27 | 95.42 | 80.63 | 72.00 | 87.15 | |||||||||||||
MIN | 50.45 | 62.26 | 67.71 | 74.77 | 84.42 | 96.11 | 104.81 | 102.68 | 93.37 | 81.39 | 68.63 | 59.39 | 83.67 | |||||||||||||
YRS | 25 | 25 | 25 | 23 | 20 | 23 | 21 | 23 | 21 | 22 | 18 | 19 | 14 |