YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1951 | ----- | z | 64.89 | 73.00 | 82.86 | a | 90.74 | 101.37 | 108.65 | 102.68 | 101.30 | 81.97 | 67.37 | 56.52 | 84.67 | a | ||||||||||
1952 | 55.61 | 64.38 | 64.55 | 80.70 | 94.16 | 97.97 | 106.19 | 107.70 | a | 98.27 | 92.23 | 65.28 | a | 58.32 | 82.11 | |||||||||||
1953 | 66.61 | 66.04 | 75.52 | 81.73 | 83.13 | 100.27 | 107.35 | 104.81 | 102.17 | 84.32 | 71.70 | 60.26 | 83.66 | |||||||||||||
1954 | 61.00 | 73.04 | 68.77 | 87.80 | 96.47 | a | 99.13 | 108.45 | 104.10 | 99.27 | 87.31 | b | 74.33 | 59.30 | a | 84.91 | ||||||||||
1955 | 54.21 | b | 60.29 | 72.90 | 77.70 | 89.13 | a | 101.43 | b | 104.32 | 103.65 | 99.93 | 88.94 | 70.63 | 63.94 | 82.26 | ||||||||||
1956 | 64.48 | 62.69 | 76.43 | a | 81.07 | 92.06 | 103.93 | 105.81 | 105.32 | 102.40 | 83.83 | a | 70.03 | 64.16 | 84.35 | |||||||||||
1957 | 56.87 | 70.93 | 74.23 | 79.53 | 86.06 | 104.30 | 106.94 | 103.03 | a | 98.62 | a | 79.13 | a | 63.73 | 63.71 | 82.26 | ||||||||||
1958 | 62.90 | 67.61 | 66.81 | 79.43 | 96.77 | a | 101.63 | 106.65 | 108.03 | 98.97 | 88.23 | 69.37 | 66.68 | 84.42 | ||||||||||||
1959 | 62.39 | 62.43 | 74.71 | 87.40 | 89.63 | a | 104.97 | 111.16 | 104.61 | 94.93 | 87.48 | 71.28 | a | 61.32 | 84.36 | |||||||||||
1960 | 54.58 | 60.41 | 77.00 | 83.80 | 92.77 | 106.90 | 111.03 | 107.58 | 100.23 | 83.68 | 68.50 | 60.77 | 83.94 | |||||||||||||
1961 | 63.77 | 67.61 | 73.52 | 83.80 | 91.74 | 107.53 | 110.29 | 105.19 | 94.07 | 82.90 | 66.10 | 57.71 | 83.69 | |||||||||||||
1962 | 61.43 | a | 64.50 | 69.06 | 90.03 | 89.00 | 101.47 | 107.77 | 108.61 | 101.10 | 86.87 | 74.93 | a | 64.16 | 84.91 | |||||||||||
1963 | 58.32 | 73.00 | 71.97 | 76.27 | 94.81 | 94.69 | a | 106.26 | 103.55 | 98.37 | 86.81 | 70.60 | 62.58 | 83.10 | ||||||||||||
1964 | 58.77 | a | 64.68 | d | 69.17 | a | 78.23 | 87.45 | 97.41 | a | 106.48 | 103.52 | 96.23 | 90.29 | 66.83 | 61.81 | 81.74 | |||||||||
1965 | 64.71 | 67.71 | 70.55 | b | 75.43 | 87.53 | a | 95.60 | 105.61 | 105.29 | 93.47 | 90.03 | a | 70.30 | 58.04 | c | 82.02 | |||||||||
1966 | 59.33 | a | 62.50 | 76.35 | 87.11 | b | 96.19 | 103.20 | 107.52 | 107.42 | 98.50 | 85.65 | 72.20 | 61.71 | 84.81 | |||||||||||
1967 | 61.87 | 69.57 | 75.35 | 72.87 | 91.42 | 96.53 | 109.23 | 106.77 | 96.70 | 88.87 | 74.17 | 55.90 | 83.27 | |||||||||||||
1968 | 61.58 | 72.21 | 76.16 | 80.17 | 91.84 | 103.27 | 106.03 | 100.55 | 98.93 | 85.84 | 71.50 | b | 57.32 | 83.78 | ||||||||||||
1969 | 61.39 | 60.50 | 69.28 | b | 83.34 | a | 94.63 | a | 98.67 | 106.26 | 109.13 | 99.80 | 80.26 | 72.33 | 63.48 | 83.26 | ||||||||||
1970 | 61.29 | 70.25 | 73.03 | 77.67 | 94.26 | 102.33 | 108.65 | 105.39 | 96.33 | 82.45 | 71.97 | 59.87 | 83.62 | |||||||||||||
1971 | 62.45 | 68.43 | 75.97 | 82.00 | 85.10 | 101.23 | 110.71 | 105.23 | 96.20 | 81.48 | 69.32 | b | 55.61 | 82.81 | ||||||||||||
1972 | 60.26 | 72.52 | 84.80 | a | 84.03 | 94.03 | b | 102.53 | 110.90 | 104.00 | 95.17 | 76.94 | 65.03 | 57.16 | 83.95 | |||||||||||
1973 | 56.06 | 64.32 | 65.48 | 80.30 | 94.97 | 101.47 | 108.97 | 104.74 | 97.43 | 86.65 | 69.67 | 63.84 | 82.82 | |||||||||||||
1974 | 54.71 | 67.79 | 75.90 | 82.17 | 95.29 | 108.47 | 106.74 | 106.42 | 102.07 | 85.74 | 71.03 | 58.20 | a | 84.54 | ||||||||||||
1975 | 61.26 | 65.04 | 69.19 | 74.10 | a | 91.94 | 102.70 | 106.03 | 105.58 | 100.63 | 85.10 | 71.43 | 65.87 | 83.24 | ||||||||||||
1976 | 66.65 | 68.57 | a | 72.00 | 80.10 | 95.33 | a | 102.57 | 107.97 | 104.52 | 93.60 | 83.19 | 75.37 | 63.29 | 84.43 | |||||||||||
1977 | 60.55 | 74.00 | 70.35 | 88.57 | 83.94 | 105.87 | 109.87 | 106.00 | 97.83 | 89.45 | 74.20 | 65.55 | 85.51 | |||||||||||||
1978 | 59.19 | 65.79 | 74.23 | a | 78.63 | 91.06 | 104.47 | 109.77 | 106.32 | 96.40 | 90.10 | 67.83 | 55.23 | 83.25 | ||||||||||||
1979 | 50.71 | 63.29 | 71.23 | 83.43 | 92.39 | 103.63 | 109.13 | 101.67 | a | 104.17 | a | 89.52 | 69.33 | 64.48 | 83.58 | |||||||||||
1980 | 62.48 | 68.10 | 69.94 | 81.83 | 86.87 | 102.07 | 109.32 | 107.26 | 99.53 | 87.19 | 73.90 | 69.65 | 84.85 | |||||||||||||
1981 | 66.29 | 69.46 | 71.57 | a | 88.79 | a | 90.90 | 107.93 | 111.13 | 109.00 | 98.50 | 80.84 | 74.30 | 64.65 | 86.11 | |||||||||||
1982 | 61.32 | 66.64 | 70.53 | a | 81.93 | a | 91.70 | a | 100.17 | 106.10 | 104.23 | 95.48 | a | 79.58 | 66.59 | a | 56.71 | 81.75 | ||||||||
1983 | 61.55 | 65.57 | 71.68 | 74.40 | 92.42 | 101.13 | 105.26 | 99.97 | a | 98.97 | 83.19 | 72.66 | a | 61.61 | h | 84.25 | a | |||||||||
1984 | 63.00 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.00 | k |
1985 | ----- | z | 61.50 | 69.81 | 84.90 | 93.03 | 104.20 | 106.81 | 106.06 | 91.15 | j | 81.65 | 64.43 | b | 61.63 | a | 83.40 | b | ||||||||
1986 | 65.84 | 68.04 | 77.48 | 80.93 | b | 90.86 | c | 103.97 | 102.32 | 105.48 | 89.60 | 79.70 | a | 69.15 | d | 58.61 | 82.67 | |||||||||
1987 | 56.10 | 63.57 | 67.58 | 84.17 | 88.39 | c | 102.27 | 102.88 | f | 103.32 | 97.07 | 86.26 | 66.32 | e | 52.65 | 78.88 | a | |||||||||
1988 | 56.26 | 66.14 | 72.97 | 78.17 | 88.64 | c | 99.73 | ----- | z | 101.61 | 94.31 | a | 90.70 | a | 70.76 | e | 59.68 | 79.91 | a | |||||||
1989 | 55.94 | 62.96 | 77.48 | 88.03 | 90.10 | 99.20 | 107.61 | 101.35 | 95.90 | 82.94 | ----- | z | ----- | z | 86.15 | b | ||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 60.32 | 66.50 | 72.54 | 81.67 | 91.23 | 102.01 | 107.76 | 104.99 | 97.90 | 85.19 | 70.12 | 60.84 | 83.62 | |||||||||||||
S.D. | 3.88 | 3.74 | 3.94 | 4.31 | 3.48 | 3.24 | 2.10 | 2.28 | 2.98 | 3.78 | 3.15 | 3.81 | 1.11 | |||||||||||||
SKEW | -0.38 | 0.24 | 0.46 | 0.01 | -0.48 | -0.14 | -0.15 | -0.20 | -0.33 | -0.16 | -0.26 | 0.03 | 0.10 | |||||||||||||
MAX | 66.65 | 74.00 | 84.80 | 90.03 | 96.77 | 108.47 | 111.16 | 109.13 | 104.17 | 92.23 | 75.37 | 69.65 | 86.11 | |||||||||||||
MIN | 50.71 | 60.29 | 64.55 | 72.87 | 83.13 | 94.69 | 102.32 | 99.97 | 89.60 | 76.94 | 63.73 | 52.65 | 81.74 | |||||||||||||
YRS | 37 | 38 | 38 | 38 | 38 | 38 | 36 | 38 | 37 | 38 | 37 | 36 | 32 |