YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.52 | 67.27 | 66.00 | 67.93 | i | |||
1950 | 66.67 | a | 66.04 | 66.10 | 65.63 | 66.52 | 67.57 | 70.65 | 71.74 | 72.62 | a | 70.90 | 69.83 | 66.13 | 68.37 | |||||||||||
1951 | 66.65 | 65.12 | c | 65.61 | 67.27 | 68.75 | k | 70.73 | 71.55 | 71.39 | 74.03 | 69.61 | 67.03 | 65.39 | 68.58 | a | ||||||||||
1952 | 63.13 | 66.21 | 62.87 | 64.69 | a | 65.61 | 67.20 | 71.19 | 71.10 | 69.30 | 70.81 | 66.70 | 66.03 | 67.07 | ||||||||||||
1953 | 68.68 | 66.29 | 64.84 | 68.17 | 68.58 | 68.43 | 70.39 | 73.06 | 71.13 | 69.84 | 67.23 | 66.71 | 68.61 | |||||||||||||
1954 | 66.94 | 67.21 | 66.39 | 70.13 | 67.32 | 70.23 | 70.29 | 70.61 | 70.50 | 70.74 | 71.27 | 63.74 | 68.78 | |||||||||||||
1955 | 63.70 | a | 62.07 | 64.74 | 64.53 | 64.39 | 67.33 | 67.55 | 67.74 | 69.30 | 68.71 | 66.63 | 67.48 | 66.18 | ||||||||||||
1956 | 67.03 | 63.62 | ----- | z | 66.70 | 66.74 | 67.53 | 70.87 | 71.06 | 71.60 | 70.39 | 68.23 | 67.97 | 68.34 | a | |||||||||||
1957 | 63.74 | 63.61 | 65.48 | 66.17 | 67.87 | 71.00 | 71.29 | 70.74 | 73.90 | 73.65 | 69.60 | 63.68 | 68.39 | |||||||||||||
1958 | 67.58 | 68.46 | 64.29 | 66.20 | 67.29 | 69.97 | 70.97 | 71.74 | 71.43 | 69.97 | 68.47 | 67.94 | 68.69 | |||||||||||||
1959 | 67.23 | 63.82 | 67.77 | 68.23 | 68.77 | 71.62 | a | 72.87 | a | 72.48 | 72.53 | 73.10 | 68.43 | b | 63.48 | b | 69.20 | |||||||||
1960 | 65.00 | 66.90 | 67.55 | 66.10 | 69.74 | 70.03 | 71.61 | 71.58 | 71.87 | 72.26 | 66.63 | 68.17 | a | 68.95 | ||||||||||||
1961 | 67.42 | 66.21 | 66.94 | 67.80 | 68.13 | 70.47 | 70.39 | 71.16 | 70.77 | 70.84 | 66.24 | a | 63.87 | 68.35 | ||||||||||||
1962 | 66.45 | 67.79 | 64.94 | 69.10 | 67.13 | 70.50 | 70.13 | 71.35 | 70.20 | 70.42 | 66.70 | 67.00 | 68.48 | |||||||||||||
1963 | 67.03 | 70.46 | 66.10 | 66.53 | 66.68 | 68.13 | 69.55 | 69.10 | b | 71.97 | 70.19 | 69.03 | 69.03 | 68.65 | ||||||||||||
1964 | 65.35 | 64.24 | 63.97 | 64.50 | 65.19 | 71.07 | 70.58 | 70.10 | 68.97 | 68.42 | 67.30 | 67.52 | 67.27 | |||||||||||||
1965 | 65.87 | 63.43 | 65.03 | 65.87 | 68.68 | 67.57 | 70.48 | 70.42 | 72.87 | 70.84 | 67.33 | 62.42 | 67.57 | |||||||||||||
1966 | 64.55 | 63.79 | 66.97 | 66.53 | 69.58 | 69.13 | 69.13 | 71.61 | 71.60 | 70.29 | 68.17 | 66.45 | 68.15 | |||||||||||||
1967 | 65.45 | 65.82 | 65.81 | 67.23 | 69.77 | 70.70 | 72.13 | 72.39 | 72.37 | 71.71 | 66.00 | a | 65.03 | 68.70 | ||||||||||||
1968 | 65.60 | a | 67.43 | a | 66.67 | a | 67.13 | 70.23 | 69.03 | 71.06 | 71.90 | 71.77 | 72.19 | 70.97 | 66.10 | 69.17 | ||||||||||
1969 | 63.45 | 62.07 | 63.58 | 62.83 | 67.73 | a | 71.03 | a | 69.97 | 69.97 | 69.53 | 71.68 | 68.23 | 68.48 | 67.38 | |||||||||||
1970 | 68.29 | 66.32 | 65.97 | 65.50 | b | 69.04 | d | 69.30 | 69.13 | 70.48 | b | 70.62 | a | 70.00 | 68.17 | 62.23 | 67.92 | |||||||||
1971 | 65.13 | 66.39 | 64.90 | 65.47 | 66.68 | 68.30 | 69.42 | 71.13 | 71.14 | b | 69.87 | 69.80 | 62.52 | 67.56 | ||||||||||||
1972 | 63.13 | a | 63.13 | f | 68.93 | b | 63.66 | a | 67.52 | b | 69.19 | c | 68.58 | 71.32 | 71.24 | a | 71.39 | 66.86 | a | 65.48 | 67.94 | a | ||||
1973 | 65.61 | 63.18 | 63.23 | 63.77 | 65.26 | 67.77 | 70.48 | 70.67 | a | 70.75 | b | 68.97 | a | 67.54 | b | 68.37 | a | 67.13 | ||||||||
1974 | 69.00 | 66.70 | a | 66.97 | a | 66.97 | a | 68.29 | 69.46 | b | 70.07 | a | 71.74 | 72.31 | a | 70.39 | 67.03 | 64.68 | 68.63 | |||||||
1975 | 63.76 | b | 64.46 | 62.65 | 63.90 | 65.68 | 66.77 | 69.04 | c | 69.80 | a | 70.00 | b | 68.55 | 68.03 | a | 66.55 | 66.60 | ||||||||
1976 | 65.45 | 62.34 | 64.35 | 63.57 | 66.00 | 67.00 | 69.13 | a | 71.35 | 72.90 | 70.67 | a | 67.97 | a | 66.82 | c | 67.30 | |||||||||
1977 | 68.10 | 68.14 | 62.19 | 65.60 | 67.43 | a | 70.45 | a | 70.03 | a | 72.34 | b | 71.79 | a | 70.90 | a | 70.53 | 67.83 | a | 68.78 | ||||||
1978 | 68.55 | 68.59 | a | 66.81 | 68.15 | d | 69.58 | 69.03 | 69.81 | 71.87 | 71.07 | 71.37 | a | 69.74 | c | 63.33 | a | 68.99 | ||||||||
1979 | 64.04 | g | 61.73 | b | 66.00 | e | 66.48 | e | 67.93 | c | 68.44 | c | 72.72 | b | 74.19 | 75.90 | 73.42 | 70.27 | 71.07 | a | 69.83 | a | ||||
1980 | 69.74 | 70.61 | a | 63.10 | 69.54 | d | 70.39 | 69.23 | 71.81 | 73.16 | 73.30 | 72.77 | 72.13 | 70.71 | 70.54 | |||||||||||
1981 | 70.61 | 68.93 | 68.52 | 70.37 | 70.53 | a | 73.37 | 74.06 | 74.45 | 75.37 | 72.50 | a | 69.77 | 65.97 | 71.20 | |||||||||||
1982 | 66.03 | 70.59 | a | 66.10 | b | 68.10 | 69.07 | a | 73.07 | a | 72.26 | 73.45 | 72.17 | 72.45 | 69.87 | 69.29 | 70.20 | |||||||||
1983 | 70.68 | c | 70.96 | a | 71.57 | a | 67.54 | b | 68.55 | 71.92 | d | 71.13 | 72.07 | a | 72.67 | 70.35 | 73.62 | a | 71.73 | a | 71.07 | |||||
1984 | 70.06 | 70.07 | 72.13 | a | 68.20 | 71.16 | 70.17 | 72.87 | 71.87 | 73.97 | a | 74.71 | 69.37 | 67.26 | 70.99 | |||||||||||
1985 | 68.72 | b | 67.71 | d | 63.45 | b | 65.14 | b | 66.28 | m | 71.93 | a | 72.29 | 74.13 | 73.40 | 70.84 | 71.70 | 69.65 | 69.91 | a | ||||||
1986 | 69.10 | a | 70.31 | b | 72.87 | a | 67.18 | b | 71.43 | c | 70.85 | d | 72.66 | b | 75.79 | b | 74.59 | c | 74.00 | b | 69.50 | 69.13 | a | 71.45 | ||
1987 | 66.93 | c | 69.63 | a | 67.84 | f | 67.89 | b | 67.26 | d | 71.45 | a | 71.35 | 74.86 | b | 74.70 | c | 71.97 | 69.33 | c | 68.30 | a | 70.33 | a | ||
1988 | 69.19 | 68.71 | a | 68.76 | b | 68.31 | d | 70.54 | c | 71.87 | 72.42 | 74.30 | a | 73.69 | a | 74.55 | 71.62 | d | 69.32 | 71.11 | ||||||
1989 | 65.67 | a | 67.54 | 68.72 | b | 68.07 | 68.29 | 71.73 | d | 70.55 | b | 73.77 | 71.50 | 72.54 | c | 71.32 | b | 70.21 | c | 69.99 | ||||||
1990 | 65.10 | 61.38 | d | 66.24 | b | 69.96 | b | 68.64 | c | 67.97 | a | 71.30 | a | 72.94 | 72.36 | b | 68.83 | a | 67.89 | c | 66.20 | a | 68.23 | |||
1991 | 68.26 | 71.29 | 64.29 | 68.27 | 70.68 | 71.00 | a | 72.28 | b | 73.73 | a | 74.83 | 74.03 | a | 72.35 | d | 67.13 | 70.68 | ||||||||
1992 | 68.61 | 68.17 | 68.77 | a | 69.18 | h | 73.32 | i | 71.66 | a | 73.07 | a | 72.52 | 74.27 | 75.46 | e | 71.62 | i | 67.55 | 71.12 | c | |||||
1993 | 68.14 | c | 66.78 | a | 68.77 | 69.43 | 69.52 | 72.07 | 71.26 | 73.77 | a | 75.08 | d | 72.53 | a | 68.93 | a | 65.10 | a | 70.11 | ||||||
1994 | 67.71 | 67.74 | a | 67.16 | 67.97 | 69.74 | 70.70 | 73.97 | 73.48 | 73.40 | 72.61 | 65.62 | a | 66.71 | 69.73 | |||||||||||
1995 | 69.58 | 70.75 | 70.16 | 68.73 | 69.13 | 70.70 | 71.35 | 72.13 | a | 73.97 | 70.97 | 71.37 | 71.13 | 70.83 | ||||||||||||
1996 | 67.47 | a | 65.89 | a | 66.81 | 70.83 | 72.03 | 72.93 | 72.16 | 74.45 | 72.50 | 73.81 | 69.10 | 66.42 | 70.37 | |||||||||||
1997 | 68.70 | a | 67.89 | 66.39 | 69.47 | 69.48 | 70.37 | 72.13 | 74.90 | 74.07 | 73.00 | 69.93 | 66.39 | 70.23 | ||||||||||||
1998 | 69.68 | 69.96 | 70.48 | 65.37 | 66.29 | 69.47 | 71.84 | 73.26 | 71.57 | 71.19 | 67.73 | 66.00 | 69.40 | |||||||||||||
1999 | 67.83 | a | 64.93 | 64.94 | 66.60 | 69.57 | a | 69.50 | 72.23 | 71.29 | c | 70.45 | a | 72.13 | a | 68.17 | 66.80 | a | 68.70 | |||||||
2000 | 64.81 | 71.21 | 68.73 | a | 65.90 | 71.74 | 72.38 | a | 71.11 | c | 72.67 | a | 72.40 | 72.10 | 69.72 | a | 70.10 | a | 70.24 | |||||||
2001 | 69.87 | a | 67.16 | c | 67.42 | 66.03 | 69.52 | 71.10 | 72.83 | a | 74.29 | 73.59 | a | 71.27 | a | 71.45 | a | 66.45 | 70.08 | |||||||
2002 | 68.35 | 65.18 | 68.97 | b | 71.36 | b | 71.89 | c | 73.32 | b | 72.30 | d | 72.86 | b | 70.97 | a | 72.45 | b | 72.41 | m | 70.57 | x | 70.76 | b | ||
2003 | 70.07 | p | 68.86 | n | 70.79 | c | 65.96 | b | 71.90 | 71.76 | a | 72.84 | 73.10 | 72.73 | 74.35 | 68.67 | 69.07 | a | 71.12 | b | ||||||
2004 | 67.54 | e | 69.77 | c | 69.04 | c | 68.87 | 72.03 | b | 71.10 | 73.37 | a | 74.68 | 75.30 | 72.52 | 70.79 | a | 68.30 | a | 71.11 | ||||||
2005 | 69.77 | a | 67.73 | b | 69.13 | 67.87 | 73.38 | b | 70.55 | a | 72.39 | 72.87 | a | 72.48 | a | 69.77 | 70.33 | 72.23 | a | 70.71 | ||||||
2006 | 66.90 | a | 67.12 | b | 65.55 | 66.72 | a | 67.87 | 72.40 | 72.90 | 73.71 | 71.97 | 73.03 | a | 72.80 | 69.20 | a | 70.01 | ||||||||
2007 | 67.26 | 65.58 | b | 68.19 | 67.21 | b | 70.39 | 71.23 | 73.61 | 72.45 | 72.39 | b | 70.87 | a | 70.97 | 65.59 | b | 69.65 | ||||||||
2008 | 66.00 | b | 67.38 | 68.60 | a | 69.79 | b | 72.63 | a | 71.00 | 73.62 | b | 73.16 | 72.07 | b | 71.39 | 70.57 | b | 66.55 | b | 70.23 | |||||
2009 | 66.77 | a | 65.05 | g | 62.43 | a | 65.89 | b | 72.34 | b | 72.00 | a | 72.17 | a | 73.52 | 72.53 | 72.93 | d | 69.89 | c | 72.07 | a | 70.23 | a | ||
2010 | 70.92 | e | 69.11 | a | 66.69 | b | 67.69 | d | 70.13 | a | 71.30 | c | 72.07 | b | 72.61 | 73.32 | e | 72.24 | b | 70.17 | 69.21 | b | 70.46 | |||
2011 | 68.43 | h | 70.48 | a | 68.38 | b | 70.03 | a | 68.50 | a | 70.17 | a | 71.00 | e | 71.31 | b | 71.62 | a | 71.00 | 67.08 | d | 65.76 | b | 69.58 | a | |
2012 | 68.81 | e | 66.88 | c | 65.57 | a | 67.00 | r | 67.82 | c | 67.96 | f | 68.33 | a | 69.41 | b | 68.43 | b | 70.71 | c | 65.46 | f | 65.38 | e | 67.93 | c |
2013 | 65.62 | b | 62.85 | b | 65.94 | 68.33 | c | 70.07 | c | 69.62 | a | 71.07 | d | 71.93 | c | 72.07 | c | 72.08 | s | 69.88 | f | 67.40 | k | 68.61 | c | |
2014 | 68.44 | o | 70.54 | o | 68.53 | l | 69.18 | m | 70.53 | n | 70.47 | m | 72.76 | n | 73.41 | n | 75.06 | m | 73.23 | r | ----- | z | ----- | z | ----- | z |
2015 | ----- | z | 74.78 | s | 67.06 | o | 67.85 | q | 67.40 | u | 71.43 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 67.13 | 66.86 | 66.65 | 67.15 | 68.88 | 70.24 | 71.31 | 72.27 | 72.28 | 71.54 | 69.10 | 67.12 | 69.18 | |||||||||||||
S.D. | 2.01 | 2.68 | 2.43 | 1.93 | 2.05 | 1.67 | 1.44 | 1.58 | 1.65 | 1.60 | 1.86 | 2.37 | 1.35 | |||||||||||||
SKEW | -0.16 | -0.23 | 0.34 | -0.04 | 0.03 | -0.28 | -0.31 | -0.22 | -0.03 | 0.24 | 0.23 | 0.09 | -0.20 | |||||||||||||
MAX | 70.92 | 71.29 | 72.87 | 71.36 | 73.38 | 73.37 | 74.06 | 75.79 | 75.90 | 75.46 | 73.62 | 72.23 | 71.45 | |||||||||||||
MIN | 63.13 | 61.38 | 62.19 | 62.83 | 64.39 | 66.77 | 67.55 | 67.74 | 68.43 | 68.42 | 65.62 | 62.23 | 66.18 | |||||||||||||
YRS | 61 | 61 | 62 | 62 | 61 | 63 | 64 | 64 | 64 | 64 | 61 | 63 | 51 |