| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.30 | j | 51.45 | 51.45 | ||
| 1950 | 46.10 | 54.50 | 54.93 | a | 59.23 | 62.19 | 63.40 | 68.55 | 67.23 | 65.77 | 64.26 | 62.17 | 57.26 | 60.47 | ||||||||||||
| 1951 | 51.87 | 55.39 | 55.81 | 57.13 | 63.13 | 64.70 | 64.68 | c | 64.74 | 64.80 | 64.74 | 59.40 | 52.16 | 59.88 | ||||||||||||
| 1952 | 48.68 | 54.83 | 53.06 | 57.63 | 62.74 | 62.60 | 65.90 | 64.65 | 66.27 | 63.71 | 59.83 | 51.19 | 59.26 | |||||||||||||
| 1953 | 55.97 | 56.95 | h | 55.65 | 57.23 | 60.52 | 65.10 | 67.03 | 67.35 | 68.23 | 66.00 | 59.30 | 55.35 | 61.61 | ||||||||||||
| 1954 | 52.35 | 58.57 | 56.42 | 60.30 | 62.47 | a | 63.50 | 65.03 | 65.97 | 67.27 | 65.61 | 60.57 | 54.10 | 61.01 | ||||||||||||
| 1955 | 52.06 | 53.43 | 56.42 | 54.50 | 61.81 | 65.90 | 64.87 | 63.65 | 66.20 | 61.61 | 56.37 | 54.54 | c | 59.28 | ||||||||||||
| 1956 | 52.97 | 52.14 | 55.84 | 58.67 | 62.84 | 66.30 | 66.87 | 68.55 | 67.57 | 63.13 | 60.07 | 55.00 | 60.83 | |||||||||||||
| 1957 | 50.03 | 56.07 | 55.20 | a | 59.97 | 62.29 | 66.93 | 66.97 | 67.70 | a | 69.40 | 64.94 | 59.70 | 55.00 | 61.18 | |||||||||||
| 1958 | 56.97 | 58.89 | 56.10 | 59.87 | 64.52 | 68.53 | 66.42 | 67.87 | 73.67 | 64.52 | 59.50 | 59.00 | 62.99 | |||||||||||||
| 1959 | 55.45 | 55.00 | 58.23 | 60.93 | 62.23 | a | 65.72 | a | 67.55 | 67.06 | 68.50 | 67.19 | 61.63 | 55.94 | 62.12 | |||||||||||
| 1960 | 53.81 | 56.28 | 56.06 | 58.67 | 61.00 | 70.43 | 65.97 | 68.39 | 64.30 | 63.90 | 57.80 | 56.52 | 61.09 | |||||||||||||
| 1961 | 58.74 | 57.29 | 56.03 | 60.07 | 60.23 | 66.77 | 66.45 | 66.87 | 68.73 | 63.45 | 56.93 | 53.45 | 61.25 | |||||||||||||
| 1962 | 55.16 | 54.50 | 54.74 | 59.33 | 60.65 | 64.77 | 66.61 | 66.74 | 65.37 | 64.40 | a | 60.00 | 57.94 | 60.85 | ||||||||||||
| 1963 | 54.68 | 61.79 | 56.06 | 56.87 | 61.74 | 66.03 | 69.03 | 66.90 | 69.00 | 64.78 | d | 59.07 | 57.33 | a | 61.94 | |||||||||||
| 1964 | 52.48 | 58.83 | 54.35 | 57.60 | 60.13 | 64.43 | 66.97 | 68.94 | 69.23 | 65.81 | 56.73 | ----- | z | 61.41 | ||||||||||||
| 1965 | ----- | z | 54.53 | m | 57.23 | 58.13 | 59.90 | a | 61.63 | 63.94 | 67.97 | 64.39 | b | 66.23 | a | 60.83 | 52.45 | 61.27 | ||||||||
| 1966 | 53.10 | 53.71 | 54.52 | 61.00 | 61.39 | 65.73 | 64.74 | 66.10 | 69.47 | 63.16 | 58.67 | 55.71 | 60.61 | |||||||||||||
| 1967 | 53.52 | b | 56.64 | 54.26 | 54.07 | 61.55 | 63.13 | 66.06 | 65.84 | 69.23 | d | 67.10 | 61.27 | 52.87 | 60.46 | |||||||||||
| 1968 | 53.87 | 59.38 | 58.65 | 58.93 | 61.13 | 65.37 | 65.48 | 68.48 | 67.77 | 62.29 | 57.77 | 51.29 | 60.87 | |||||||||||||
| 1969 | 48.48 | 52.00 | 58.55 | 57.30 | 63.16 | 63.83 | 65.97 | a | 66.19 | 66.10 | 65.77 | 62.63 | 56.84 | 60.57 | ||||||||||||
| 1970 | 56.06 | 62.82 | 59.35 | 56.53 | 63.45 | 63.40 | 64.43 | a | 64.45 | 68.73 | 62.03 | 59.63 | 51.74 | 61.05 | ||||||||||||
| 1971 | 53.10 | 55.14 | 54.03 | 54.73 | 59.45 | 61.97 | 64.43 | a | 67.71 | 66.93 | 60.39 | 57.07 | 50.52 | 58.79 | ||||||||||||
| 1972 | 50.93 | a | 55.59 | 58.03 | 57.70 | 59.58 | 63.59 | a | 65.58 | 68.00 | 65.10 | 65.93 | a | 58.77 | 50.32 | 59.93 | ||||||||||
| 1973 | 52.67 | a | 58.71 | 54.84 | 62.76 | a | 60.71 | 66.07 | 65.80 | a | 63.68 | 67.77 | 61.97 | 54.17 | 55.58 | 60.39 | ||||||||||
| 1974 | 53.63 | a | 53.14 | 56.61 | 58.37 | 60.16 | 63.90 | 67.06 | 66.94 | 65.07 | 66.61 | 61.10 | 53.32 | 60.49 | ||||||||||||
| 1975 | 55.13 | 54.04 | 55.23 | 55.17 | 62.45 | 65.63 | 66.23 | a | 65.43 | a | 63.47 | 61.19 | 55.90 | 55.68 | 59.63 | |||||||||||
| 1976 | 55.19 | 53.66 | 54.26 | 56.57 | 61.84 | 64.60 | 66.81 | 65.42 | 66.73 | 64.90 | 61.67 | 57.65 | 60.77 | |||||||||||||
| 1977 | 57.87 | a | 59.89 | 55.26 | 59.27 | 59.90 | a | 64.63 | 66.13 | 65.68 | 65.30 | 62.23 | 57.17 | 56.81 | 60.84 | |||||||||||
| 1978 | 57.60 | a | 56.68 | 62.23 | 59.47 | 65.55 | 64.47 | 67.26 | 67.97 | 67.97 | 66.42 | 57.50 | 52.55 | 62.14 | ||||||||||||
| 1979 | 53.52 | 52.54 | 57.81 | 59.00 | 64.29 | 65.50 | 68.13 | 68.81 | 72.43 | 64.58 | 58.93 | 58.32 | 61.99 | |||||||||||||
| 1980 | 56.13 | 60.62 | 56.53 | a | 61.80 | 60.58 | 63.93 | 67.42 | 66.29 | 67.40 | 65.61 | 59.80 | 58.94 | 62.09 | ||||||||||||
| 1981 | 60.32 | 58.93 | 58.42 | 59.17 | 61.87 | 66.93 | 66.32 | 66.19 | 66.57 | 62.74 | 60.17 | 55.39 | 61.92 | |||||||||||||
| 1982 | 52.29 | 56.71 | 55.74 | 58.83 | 64.68 | 62.47 | 65.39 | 66.52 | 68.63 | 66.52 | 58.23 | 55.97 | 61.00 | |||||||||||||
| 1983 | 57.06 | 57.21 | 58.48 | 59.43 | 62.19 | 66.47 | 67.42 | 68.90 | 71.00 | 65.13 | 57.50 | 52.97 | 61.98 | |||||||||||||
| 1984 | 58.10 | 57.31 | 60.23 | 58.33 | 62.26 | 64.77 | 68.71 | 67.84 | 70.03 | 62.00 | 56.80 | 53.68 | 61.67 | |||||||||||||
| 1985 | 57.06 | 57.43 | 54.29 | 59.63 | 61.65 | 67.50 | 67.65 | 67.00 | 65.13 | 64.00 | 52.30 | 56.48 | 60.84 | |||||||||||||
| 1986 | 59.45 | 57.00 | 60.61 | 57.27 | 60.65 | 65.93 | 66.48 | 64.94 | 64.80 | 63.13 | 61.20 | 57.61 | 61.59 | |||||||||||||
| 1987 | 56.03 | 59.57 | 59.39 | 60.40 | 64.27 | a | 64.43 | 65.52 | 66.42 | 64.13 | 65.55 | 60.83 | 54.32 | 61.74 | ||||||||||||
| 1988 | 55.29 | 59.21 | 58.23 | 58.73 | 61.77 | 64.03 | 69.23 | 65.68 | 67.00 | 61.97 | 57.93 | 55.77 | 61.24 | |||||||||||||
| 1989 | 53.23 | 51.00 | 56.35 | 63.77 | 63.26 | 66.77 | 66.97 | 68.55 | 66.33 | 64.48 | 62.60 | 59.48 | 61.90 | |||||||||||||
| 1990 | 54.61 | 52.82 | ----- | z | 60.53 | 64.16 | 65.90 | 68.81 | 67.74 | 70.13 | 65.06 | 58.30 | 49.87 | 61.63 | ||||||||||||
| 1991 | 55.06 | 60.82 | 55.26 | 57.90 | 59.58 | 63.97 | 67.23 | 66.90 | 68.30 | 68.52 | 60.67 | 57.45 | 61.80 | |||||||||||||
| 1992 | 57.61 | 63.26 | j | 61.19 | 63.53 | 65.87 | 66.07 | 67.39 | 66.77 | 67.63 | 67.55 | 58.67 | 52.52 | 63.16 | ||||||||||||
| 1993 | 52.90 | 55.89 | 58.03 | 57.93 | 64.55 | 67.13 | 69.19 | 67.00 | 63.97 | 64.68 | 58.57 | 55.52 | 61.28 | |||||||||||||
| 1994 | 56.84 | 53.21 | 59.55 | 58.80 | 60.87 | 62.97 | 66.52 | 68.39 | 66.93 | 63.39 | 51.33 | 50.87 | 59.97 | |||||||||||||
| 1995 | 54.48 | 57.93 | 56.00 | 57.90 | 59.87 | 62.93 | 67.84 | 67.23 | 66.57 | 64.87 | 59.00 | 56.03 | 60.89 | |||||||||||||
| 1996 | 52.65 | 56.93 | 59.00 | 58.33 | 61.39 | 63.47 | 65.26 | 64.71 | 64.13 | 63.16 | 57.10 | 53.48 | 59.97 | |||||||||||||
| 1997 | 53.77 | 55.86 | 56.29 | 57.93 | 65.23 | 64.87 | 66.61 | 67.68 | 70.00 | 62.48 | 58.73 | 54.55 | 61.17 | |||||||||||||
| 1998 | 52.97 | 52.96 | 55.94 | 56.33 | 58.16 | 62.60 | 64.06 | 64.48 | 64.77 | 64.45 | 54.83 | 49.16 | 58.39 | |||||||||||||
| 1999 | 52.71 | 50.54 | 52.71 | 58.30 | 57.77 | 63.67 | 64.35 | 67.29 | 67.50 | 63.86 | c | 60.80 | 54.81 | 59.53 | ||||||||||||
| 2000 | 53.94 | 57.00 | 57.32 | 60.70 | 62.26 | 67.60 | 65.00 | 66.10 | 70.47 | 62.84 | 55.73 | 57.52 | 61.37 | |||||||||||||
| 2001 | 56.39 | 55.39 | 58.19 | 56.07 | 65.45 | 64.37 | 64.42 | 65.77 | 64.67 | 65.03 | 58.20 | 54.00 | 60.66 | |||||||||||||
| 2002 | 53.71 | 58.50 | 56.68 | 59.73 | 61.10 | 64.27 | 67.39 | 66.00 | 67.47 | 63.39 | 61.63 | 55.83 | a | 61.31 | ||||||||||||
| 2003 | 55.33 | a | 50.32 | 48.61 | 46.20 | 53.07 | b | 57.40 | 56.68 | 59.90 | 61.63 | 58.45 | 49.77 | 47.13 | 53.71 | |||||||||||
| 2004 | ----- | z | 45.44 | t | ----- | z | 63.77 | 64.21 | b | 65.47 | 70.19 | 71.29 | 68.83 | 65.23 | 60.53 | 55.84 | 65.04 | |||||||||
| 2005 | 55.52 | 61.50 | 61.90 | ----- | z | ----- | z | ----- | z | 71.38 | g | 71.71 | x | ----- | z | ----- | z | ----- | z | ----- | z | 59.64 | ||||
| 2006 | ----- | z | 57.27 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.18 | i | 56.13 | ----- | z | 56.13 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 54.36 | 56.27 | 56.68 | 58.52 | 61.81 | 64.81 | 66.35 | 66.67 | 67.18 | 64.24 | 58.56 | 54.60 | 60.75 | |||||||||||||
| S.D. | 2.71 | 2.99 | 2.44 | 2.71 | 2.21 | 1.99 | 1.96 | 1.74 | 2.35 | 1.90 | 2.65 | 2.71 | 1.39 | |||||||||||||
| SKEW | -0.44 | 0.03 | -0.17 | -1.47 | -0.90 | -0.48 | -1.97 | -0.84 | 0.26 | -0.35 | -1.12 | -0.47 | -2.69 | |||||||||||||
| MAX | 60.32 | 62.82 | 62.23 | 63.77 | 65.87 | 70.43 | 70.19 | 71.29 | 73.67 | 68.52 | 62.63 | 59.48 | 62.99 | |||||||||||||
| MIN | 46.10 | 50.32 | 48.61 | 46.20 | 53.07 | 57.40 | 56.68 | 59.90 | 61.63 | 58.45 | 49.77 | 47.13 | 53.71 | |||||||||||||
| NO YRS | 54 | 52 | 54 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 56 | 55 | 49 | |||||||||||||