YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1964 | ----- | z | 68.79 | 75.26 | 81.13 | 91.57 | a | 99.87 | 106.63 | a | 103.23 | a | 99.10 | 94.71 | 72.10 | 68.74 | 87.38 | a | ||||||||
1965 | 69.48 | 73.43 | 74.13 | 83.27 | 90.77 | 95.60 | 105.55 | 104.87 | 97.30 | 95.42 | 76.70 | 65.32 | 85.99 | |||||||||||||
1966 | 63.52 | 67.43 | 79.17 | a | 88.77 | 95.26 | 101.60 | 105.61 | 104.06 | 100.10 | 88.13 | 78.00 | 68.94 | 86.71 | ||||||||||||
1967 | 69.27 | a | 75.18 | 78.70 | a | 77.80 | 93.16 | 97.90 | 107.23 | 107.61 | 97.83 | 93.48 | 81.47 | 63.60 | a | 86.94 | ||||||||||
1968 | 67.90 | 76.79 | 79.35 | 86.43 | 95.26 | 103.27 | 104.55 | 101.39 | 102.53 | 90.81 | 78.40 | 66.10 | 87.73 | |||||||||||||
1969 | 69.68 | 68.89 | 76.71 | 86.50 | 96.45 | 97.80 | 106.48 | 109.45 | 102.07 | 86.97 | 75.13 | 68.03 | 87.01 | |||||||||||||
1970 | ----- | z | 75.07 | 76.39 | 81.50 | 95.39 | 102.87 | 107.63 | a | 105.23 | 100.03 | 88.16 | 78.93 | 67.29 | 88.95 | a | ||||||||||
1971 | 69.97 | 74.46 | 81.68 | 82.90 | 89.29 | 100.73 | 107.42 | 101.58 | 100.48 | a | 85.69 | b | 74.87 | 64.13 | 86.10 | |||||||||||
1972 | 67.36 | i | 77.10 | 89.38 | j | ----- | z | 94.52 | b | 102.83 | 109.00 | 102.67 | a | 98.90 | 82.77 | 72.53 | 66.00 | 89.59 | c | |||||||
1973 | 65.97 | 70.96 | 71.52 | 84.67 | 96.52 | 104.97 | 106.26 | 106.26 | 100.27 | 92.17 | a | 76.93 | a | 71.10 | 87.30 | |||||||||||
1974 | 66.39 | 73.61 | 79.67 | a | 87.37 | 95.73 | a | 107.30 | 105.00 | 106.10 | 101.97 | 89.61 | 77.53 | 66.42 | 88.06 | |||||||||||
1975 | 69.90 | 72.39 | 75.28 | b | 77.23 | 91.74 | 101.80 | 106.23 | 107.16 | 100.83 | 88.32 | 78.57 | 70.40 | a | 86.65 | |||||||||||
1976 | 71.42 | 71.84 | d | 78.13 | a | 81.03 | 95.23 | a | 103.03 | 103.03 | 103.39 | 92.97 | 87.48 | 81.30 | 69.61 | 86.54 | ||||||||||
1977 | 68.26 | 78.32 | 72.83 | a | 87.76 | a | 86.20 | a | 104.53 | 108.68 | 104.29 | 99.50 | 92.26 | 81.90 | 73.94 | 88.21 | ||||||||||
1978 | 68.37 | a | 71.43 | 79.30 | a | 82.90 | a | 94.26 | 106.43 | 108.17 | a | 105.30 | a | 98.33 | 92.45 | b | 76.23 | 63.06 | 87.19 | |||||||
1979 | 60.26 | 70.54 | 76.03 | a | 86.70 | 92.13 | 104.50 | 106.97 | 102.48 | 105.90 | 92.39 | 74.60 | 71.84 | 87.03 | ||||||||||||
1980 | 69.35 | 74.03 | 74.77 | 85.50 | 87.94 | 104.10 | 109.53 | a | 105.26 | 102.07 | 90.94 | 79.30 | 75.00 | 88.15 | ||||||||||||
1981 | 72.58 | 76.29 | 77.65 | 88.73 | 92.97 | 107.50 | 108.10 | a | 108.00 | 102.59 | a | 85.65 | 80.77 | 73.65 | 89.54 | |||||||||||
1982 | 67.20 | a | 74.71 | 75.07 | a | 85.46 | b | 92.71 | 99.37 | c | 105.48 | 105.86 | c | 98.11 | c | 87.81 | 73.60 | 65.39 | 85.90 | |||||||
1983 | 70.58 | 71.25 | 75.61 | 79.14 | a | 94.63 | a | 101.31 | a | 107.74 | 103.21 | b | 100.13 | 89.55 | 75.87 | 69.06 | 86.51 | |||||||||
1984 | 69.81 | 73.83 | 81.79 | b | 84.47 | 101.73 | a | 100.69 | a | 104.00 | b | 103.60 | a | 102.53 | 84.19 | 74.23 | 63.13 | 87.00 | ||||||||
1985 | 65.03 | 70.46 | 76.97 | a | 90.44 | c | 94.74 | 106.17 | a | 107.10 | 107.00 | 93.69 | a | 87.45 | b | 72.20 | 69.58 | 86.74 | ||||||||
1986 | 75.29 | 75.61 | 83.83 | a | 86.72 | a | 96.21 | c | 105.59 | a | 104.57 | a | 106.03 | a | 94.50 | 85.68 | 76.30 | 67.84 | 88.18 | |||||||
1987 | 66.32 | 73.11 | 76.97 | 92.32 | b | 93.83 | b | 105.27 | 105.90 | a | 105.90 | 101.59 | a | 92.00 | a | 73.67 | 62.87 | 87.48 | ||||||||
1988 | 66.23 | 75.93 | a | 81.69 | b | 84.96 | c | 95.55 | b | 103.77 | 107.80 | a | 106.19 | 100.77 | 94.33 | a | 75.70 | c | 66.81 | 88.31 | ||||||
1989 | 64.72 | b | 72.67 | a | 84.72 | b | 94.47 | 96.65 | 105.17 | 109.28 | m | 105.52 | 102.83 | 89.87 | a | 79.07 | 70.06 | 87.79 | a | |||||||
1990 | 67.71 | 71.74 | a | 81.59 | b | 89.85 | c | 93.90 | a | 106.60 | 110.00 | y | 105.13 | a | 101.27 | 90.72 | b | 76.50 | 63.68 | 86.24 | a | |||||
1991 | 66.66 | b | 78.46 | 71.47 | a | 87.07 | c | 93.93 | d | 100.93 | 107.61 | 106.74 | ----- | z | 93.45 | 76.33 | 65.40 | a | 86.19 | a | ||||||
1992 | 66.81 | 73.55 | 75.71 | 91.72 | a | 97.06 | 103.22 | c | 107.23 | a | 107.13 | 103.60 | 92.45 | b | 73.77 | 61.97 | 87.85 | |||||||||
1993 | 64.80 | a | 67.74 | a | 81.77 | a | 91.00 | 97.19 | 104.21 | a | 106.77 | 106.34 | b | 102.27 | 90.80 | a | 73.63 | 67.52 | 87.84 | |||||||
1994 | ----- | z | ----- | z | ----- | z | 88.07 | 93.13 | a | 109.67 | 110.32 | 110.65 | 103.47 | 87.61 | 69.39 | b | 65.68 | 93.11 | c | |||||||
1995 | 66.23 | i | 79.78 | a | 81.47 | a | 86.50 | 91.68 | 104.21 | a | 112.17 | b | 111.23 | 106.87 | 95.44 | d | 86.39 | b | 78.17 | m | 95.57 | b | ||||
1996 | 77.54 | r | 79.96 | b | 83.00 | c | 90.07 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 84.34 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 67.91 | 73.61 | 78.01 | 86.01 | 93.98 | 103.21 | 106.96 | 105.59 | 100.46 | 89.96 | 76.62 | 67.49 | 87.29 | |||||||||||||
S.D. | 3.03 | 3.28 | 3.53 | 4.17 | 2.96 | 3.10 | 1.91 | 2.34 | 3.12 | 3.33 | 3.48 | 3.43 | 0.87 | |||||||||||||
SKEW | -0.05 | 0.06 | 0.03 | -0.24 | -0.34 | -0.38 | 0.42 | 0.40 | -0.54 | -0.19 | 0.52 | 0.42 | 0.48 | |||||||||||||
MAX | 75.29 | 79.96 | 84.72 | 94.47 | 101.73 | 109.67 | 112.17 | 111.23 | 106.87 | 95.44 | 86.39 | 75.00 | 89.54 | |||||||||||||
MIN | 60.26 | 67.43 | 71.47 | 77.23 | 86.20 | 95.60 | 103.03 | 101.39 | 92.97 | 82.77 | 69.39 | 61.97 | 85.90 | |||||||||||||
YRS | 27 | 32 | 31 | 32 | 32 | 32 | 30 | 32 | 31 | 32 | 32 | 31 | 24 |