YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 85.24 | e | 92.29 | 86.91 | b | 82.08 | 68.02 | f | 56.32 | b | 52.50 | 75.89 | f | |||
1973 | 50.69 | 57.98 | 55.78 | b | 65.98 | c | 77.81 | 87.32 | 90.02 | a | 89.50 | b | 81.02 | 71.86 | j | 57.31 | i | 54.13 | 71.02 | b | ||||||
1974 | 53.07 | b | 55.70 | f | 62.61 | 67.23 | h | 73.77 | 84.50 | a | 87.18 | 88.06 | g | 83.68 | 74.47 | 60.25 | b | 49.34 | 69.87 | c | ||||||
1975 | 51.97 | 53.26 | a | 58.35 | d | 60.65 | 71.82 | ----- | z | 88.66 | c | 86.47 | k | 83.08 | j | 69.52 | h | 58.71 | d | 52.48 | 61.99 | d | ||||
1976 | 52.77 | a | 58.88 | 59.03 | b | 62.60 | i | 76.56 | g | 83.23 | f | 90.67 | h | 87.96 | f | 80.52 | a | 70.50 | e | 62.33 | 53.61 | 62.52 | e | |||
1977 | 52.97 | b | 58.41 | a | 57.44 | 67.20 | 68.73 | c | 83.45 | a | 89.38 | c | 89.72 | a | 82.79 | b | 75.77 | 62.40 | a | 56.89 | 70.43 | |||||
1978 | 54.45 | 57.36 | 63.97 | a | ----- | z | 74.89 | 84.80 | 90.60 | 87.08 | 81.17 | 75.43 | a | 59.38 | 49.81 | 70.81 | a | |||||||||
1979 | 48.42 | 54.25 | 59.19 | 66.88 | 74.23 | 83.70 | 88.71 | 85.53 | b | 85.47 | 71.74 | 55.83 | 54.10 | 69.00 | ||||||||||||
1980 | 54.95 | b | 59.12 | 58.77 | 67.18 | 70.58 | 81.70 | 91.05 | 89.11 | 82.12 | 72.53 | 61.82 | b | 57.65 | 70.55 | |||||||||||
1981 | 56.73 | 58.75 | 61.18 | 69.27 | b | 74.48 | 87.54 | e | 91.03 | 91.17 | a | 83.08 | 68.42 | 62.02 | a | 55.08 | 71.56 | |||||||||
1982 | 53.06 | 62.55 | 60.37 | a | 67.58 | 74.94 | f | 79.07 | o | 87.40 | g | 88.71 | j | 82.53 | 68.63 | a | 58.80 | 52.50 | a | 63.25 | d | |||||
1983 | 53.90 | b | 56.52 | 61.11 | c | 63.62 | b | 75.27 | c | 80.76 | m | 89.09 | n | 85.92 | g | 84.45 | h | 73.33 | d | 60.16 | b | 56.86 | c | 62.60 | d | |
1984 | 56.66 | c | 57.15 | e | 62.67 | h | 68.69 | i | 79.04 | c | 81.48 | g | 89.18 | l | 88.07 | h | 86.04 | f | 69.17 | g | 59.76 | k | 52.64 | f | 64.28 | i |
1985 | 53.23 | i | 55.76 | e | 60.40 | k | 71.07 | i | 76.50 | b | 86.76 | g | ----- | z | 88.79 | q | 75.47 | n | 71.43 | i | 58.29 | d | 53.57 | i | 63.52 | i |
1986 | 59.86 | b | 61.52 | h | 65.05 | l | 68.42 | k | 75.90 | f | 84.12 | i | 86.27 | e | 90.40 | p | 77.65 | d | 69.97 | n | 61.93 | h | 55.08 | k | 74.60 | i |
1987 | 52.15 | e | 62.09 | q | 60.81 | j | 72.48 | d | ----- | z | 84.76 | e | 86.50 | s | 88.83 | m | 83.19 | i | 76.25 | i | 60.75 | b | 50.70 | a | 64.17 | g |
1988 | 52.94 | n | 60.98 | i | 60.58 | l | ----- | z | 77.54 | s | 83.26 | k | 90.80 | h | 89.50 | c | 81.69 | d | 78.22 | k | 58.62 | j | 52.90 | 74.70 | i | |
1989 | 50.98 | d | 56.68 | 64.36 | b | 73.72 | a | 76.10 | b | 82.47 | 89.77 | a | 86.97 | 87.50 | 73.31 | 62.37 | 54.00 | 71.52 | ||||||||
1990 | 51.76 | b | 53.33 | a | 63.79 | b | 70.40 | a | 74.32 | c | 84.50 | a | 89.74 | b | 87.10 | b | 84.60 | 74.50 | a | 62.75 | 50.12 | a | 70.58 | |||
1991 | 53.39 | 61.70 | a | 57.38 | b | 66.38 | a | 71.41 | b | 79.36 | a | 86.21 | 88.42 | 83.46 | b | 75.79 | 62.79 | a | 56.70 | a | 70.25 | |||||
1992 | 54.65 | 60.14 | 61.84 | b | 72.30 | 77.72 | a | 82.74 | a | 88.23 | 89.80 | c | 85.32 | 74.39 | 58.29 | a | 50.31 | b | 71.31 | |||||||
1993 | 55.34 | 55.77 | 64.39 | 70.08 | 77.69 | 82.54 | b | 85.71 | 88.21 | 83.29 | a | 74.85 | d | 59.03 | 52.98 | 70.82 | ||||||||||
1994 | 54.47 | a | 55.54 | a | 65.45 | 70.77 | 73.04 | h | 87.37 | 89.42 | a | 91.63 | 85.27 | 73.08 | 60.70 | 55.33 | a | 71.73 | a | |||||||
1995 | 54.98 | 62.84 | 64.65 | a | 66.62 | a | 72.13 | a | 80.88 | 91.65 | 93.20 | a | 88.05 | 74.70 | a | 67.75 | 57.63 | 72.92 | ||||||||
1996 | 55.85 | 61.33 | 62.79 | 71.00 | 77.74 | 86.07 | 90.82 | 91.60 | a | 83.17 | 73.48 | a | 63.37 | 55.27 | 72.71 | |||||||||||
1997 | 55.90 | 56.77 | 67.58 | 68.81 | a | 81.73 | a | 81.82 | 88.92 | a | 90.83 | a | 86.29 | b | 73.08 | 62.57 | 51.77 | 72.17 | ||||||||
1998 | 55.55 | 54.52 | a | 60.52 | b | 63.62 | b | 71.50 | a | 81.23 | f | 92.00 | 93.42 | a | 86.57 | 71.58 | 61.60 | a | 54.38 | f | 71.09 | b | ||||
1999 | 56.31 | 59.31 | b | 61.56 | 64.61 | c | 75.61 | 83.55 | a | 88.46 | e | 89.12 | a | 86.69 | a | 77.53 | a | 66.00 | a | 53.67 | a | 71.87 | ||||
2000 | 55.77 | 57.98 | 63.05 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.94 | i | ||
2001 | ----- | z | ----- | z | 64.57 | h | 68.24 | g | 81.55 | b | 87.61 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 81.55 | k |
2002 | ----- | z | ----- | z | ----- | z | 70.82 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.06 | m | 70.82 | k | |
2003 | 59.42 | k | 56.37 | e | 62.62 | k | 65.07 | i | 77.35 | k | 83.36 | h | 92.59 | h | 91.53 | k | 85.98 | g | 78.39 | h | 58.17 | i | 52.62 | j | 56.37 | k |
2004 | 55.05 | j | 55.83 | h | 70.96 | g | 71.57 | i | 78.26 | 84.60 | 90.89 | 90.47 | 84.48 | 70.34 | 57.58 | 53.53 | 76.27 | d | ||||||||
2005 | 55.35 | 57.86 | 61.61 | 67.22 | a | 77.02 | ----- | z | 93.43 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.75 | f | ||||
2006 | 54.56 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.56 | k | |
2007 | ----- | z | ----- | z | 66.15 | 69.40 | 76.76 | 85.35 | 92.42 | 93.73 | 86.27 | 73.08 | 65.25 | 50.02 | 75.84 | b | ||||||||||
2008 | 52.56 | 57.31 | 63.94 | 70.17 | 73.56 | 88.23 | 92.31 | 91.82 | 87.87 | 74.10 | 64.32 | ----- | z | 74.20 | a | |||||||||||
2009 | 57.23 | 58.32 | 63.47 | 67.92 | 80.92 | 82.95 | 94.95 | 91.77 | ----- | z | 70.72 | a | 63.12 | 52.05 | 71.22 | a | ||||||||||
2010 | 56.32 | 57.84 | 61.10 | 66.70 | 72.85 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.96 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 54.28 | 57.71 | 61.84 | 68.13 | 75.50 | 84.15 | 90.00 | 89.85 | 83.95 | 73.14 | 61.23 | 53.40 | 71.21 | |||||||||||||
S.D. | 2.29 | 2.48 | 2.87 | 3.05 | 3.31 | 2.25 | 2.27 | 2.26 | 2.54 | 2.27 | 2.84 | 2.47 | 1.09 | |||||||||||||
SKEW | -0.21 | 0.26 | -0.17 | -0.36 | 0.06 | -0.01 | -0.03 | -0.04 | -0.30 | -0.41 | 0.14 | 0.11 | -0.20 | |||||||||||||
MAX | 59.86 | 62.84 | 67.58 | 73.72 | 81.73 | 88.23 | 94.95 | 93.73 | 88.05 | 77.53 | 67.75 | 57.65 | 72.92 | |||||||||||||
MIN | 48.42 | 53.26 | 55.78 | 60.65 | 68.73 | 79.36 | 85.71 | 85.53 | 77.65 | 68.42 | 55.83 | 49.34 | 69.00 | |||||||||||||
YRS | 31 | 29 | 28 | 26 | 28 | 23 | 26 | 23 | 26 | 24 | 28 | 27 | 13 |