YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1964 | ----- | z | ----- | z | 60.03 | 70.43 | 77.68 | 87.60 | 95.73 | a | 94.86 | c | 86.93 | a | 83.43 | a | 58.87 | 52.23 | 76.78 | b | ||||||
1965 | 58.06 | 61.36 | 62.45 | 65.67 | 76.87 | 83.73 | 93.74 | 92.30 | a | 83.14 | b | 83.60 | a | 63.96 | c | 51.00 | b | 72.99 | ||||||||
1966 | 51.66 | b | 53.00 | 68.61 | 78.10 | a | 84.57 | a | 91.30 | 96.35 | 97.55 | 89.17 | 78.65 | 65.33 | 54.70 | a | 75.75 | |||||||||
1967 | 53.90 | 61.26 | a | 65.77 | e | 61.97 | 79.65 | 85.87 | 98.13 | a | 96.13 | a | 87.47 | 81.24 | b | 66.60 | 47.27 | a | 73.77 | |||||||
1968 | 54.00 | 63.66 | 66.03 | a | 70.23 | 81.44 | d | 92.90 | 95.16 | 89.23 | a | 88.47 | 76.87 | 63.17 | 49.10 | 74.19 | ||||||||||
1969 | 53.43 | a | 51.71 | 60.65 | 73.47 | 83.74 | 87.20 | 95.53 | a | 97.47 | a | 89.60 | 71.80 | a | 65.41 | a | 56.43 | a | 73.87 | |||||||
1970 | 54.39 | 62.57 | 63.03 | 67.87 | 84.07 | a | 90.72 | a | 96.57 | a | 94.97 | a | 86.17 | a | 74.13 | a | 64.00 | a | 50.35 | 74.07 | ||||||
1971 | 54.58 | 60.46 | 66.45 | 71.03 | 74.03 | 89.57 | 98.13 | 94.39 | 86.93 | a | 72.48 | 61.10 | a | 47.33 | a | 73.04 | ||||||||||
1972 | 49.29 | 59.93 | 72.94 | 73.47 | 83.10 | 90.73 | 98.60 | a | 92.17 | a | 83.90 | 68.83 | a | 55.87 | 48.40 | a | 73.10 | |||||||||
1973 | 47.94 | 54.21 | 55.97 | 69.93 | 84.00 | 91.37 | 98.36 | c | 94.61 | 87.23 | 77.40 | a | 59.83 | 53.55 | 72.87 | |||||||||||
1974 | 43.83 | a | 57.00 | 66.57 | a | 71.70 | 85.52 | 92.50 | 95.50 | a | 94.79 | b | 91.27 | 75.86 | b | 61.63 | c | 50.45 | 73.88 | |||||||
1975 | 54.03 | 56.14 | 57.65 | 63.33 | 79.28 | b | 89.57 | 95.77 | 93.84 | f | 89.47 | 75.90 | a | 62.47 | 57.90 | 71.05 | a | |||||||||
1976 | 58.26 | 59.48 | 62.00 | 67.87 | 82.97 | a | 89.89 | b | 97.43 | a | 92.69 | b | 88.52 | a | 75.67 | g | 69.40 | 57.57 | a | 75.10 | a | |||||
1977 | 53.70 | h | 67.28 | j | ----- | z | ----- | z | 76.83 | m | 92.40 | o | 98.35 | n | 97.96 | h | 89.09 | g | 82.55 | k | 72.90 | t | ----- | z | ----- | z |
1978 | ----- | z | 58.15 | h | 67.91 | h | 69.48 | a | 80.65 | e | 92.47 | 98.33 | g | 97.47 | a | 89.15 | c | 83.19 | 63.67 | o | ----- | z | 85.40 | f | ||
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 96.59 | a | 99.52 | b | 92.54 | c | 94.97 | 82.14 | b | 62.17 | a | 59.52 | b | 83.92 | e | |
1980 | 54.26 | 61.07 | a | 60.84 | ----- | z | 75.61 | c | 91.20 | 100.11 | c | 97.26 | 90.83 | 79.17 | a | 66.73 | 63.58 | 76.42 | a | |||||||
1981 | 59.79 | b | 62.52 | a | 62.77 | a | 76.37 | 81.06 | 97.47 | 100.58 | 99.94 | 91.89 | b | 74.50 | a | 66.90 | 58.39 | 77.68 | ||||||||
1982 | 50.74 | 59.72 | c | 60.72 | b | 72.71 | f | 81.04 | d | 89.58 | f | 95.08 | f | 93.90 | j | 81.00 | h | 70.29 | g | 56.32 | b | 49.68 | c | 59.70 | f | |
1983 | 53.48 | b | 57.08 | d | 60.12 | g | 63.48 | g | 79.33 | g | 87.52 | e | 95.04 | f | 89.76 | f | 89.48 | i | 75.36 | f | 60.36 | e | 53.03 | a | 62.30 | g |
1984 | 56.87 | 58.86 | 68.35 | e | 73.77 | h | 91.69 | e | 91.35 | d | 97.82 | i | 93.65 | e | 92.29 | f | 71.00 | e | 60.90 | 46.74 | 71.05 | c | ||||
1985 | 51.55 | b | 54.25 | d | 63.22 | d | 80.41 | c | 85.12 | f | 97.64 | b | 102.33 | d | 98.39 | 84.09 | h | 78.37 | d | 57.61 | b | 57.16 | 74.09 | b | ||
1986 | 62.68 | c | 61.58 | b | 72.21 | c | 75.40 | e | 86.89 | d | 97.78 | c | 97.77 | e | 100.55 | b | 83.31 | d | 75.92 | f | 64.45 | a | 54.53 | a | 77.92 | a |
1987 | 49.74 | 58.52 | c | 63.71 | c | 80.76 | e | 83.80 | f | 96.28 | e | 97.26 | d | 98.61 | c | 91.92 | f | 82.92 | e | 59.86 | a | 48.45 | b | 73.61 | b | |
1988 | 48.93 | b | 63.36 | d | 67.69 | e | 73.86 | b | 83.45 | b | 94.33 | c | 102.48 | d | 100.09 | h | 91.15 | d | 86.64 | c | 62.35 | g | 52.65 | 76.45 | b | |
1989 | 50.71 | 56.65 | b | 72.04 | c | 81.83 | 82.15 | d | 93.77 | 101.68 | 95.81 | 89.75 | b | 76.43 | c | 67.78 | c | 59.37 | a | 77.33 | ||||||
1990 | 53.19 | 55.44 | a | 68.06 | 77.03 | a | 81.50 | c | 95.52 | e | 99.83 | g | 95.12 | g | 91.77 | h | 77.77 | r | 64.87 | 46.04 | h | 70.80 | e | |||
1991 | 53.52 | 66.40 | c | 58.04 | f | 71.41 | c | 79.08 | e | 90.70 | j | 99.54 | g | 96.52 | 90.08 | e | 79.58 | g | 63.08 | e | 52.80 | f | 74.30 | e | ||
1992 | 50.03 | b | 59.32 | d | 62.76 | f | 77.86 | a | 86.34 | b | 92.03 | a | 95.74 | d | 100.08 | g | 92.15 | c | 80.07 | b | 59.80 | j | 46.69 | b | 75.58 | c |
1993 | 47.66 | b | 52.08 | b | 66.13 | a | 73.41 | c | 83.80 | f | 89.07 | 97.57 | h | 96.79 | c | 90.12 | e | 76.48 | d | 59.63 | 53.33 | d | 70.47 | b | ||
1994 | 56.86 | c | 53.27 | f | 71.77 | i | 75.42 | k | 82.68 | f | 97.68 | b | 100.79 | g | 100.48 | b | 91.54 | b | 74.89 | d | 54.00 | g | 51.17 | m | 84.29 | g |
1995 | 48.74 | d | 66.88 | d | 60.82 | c | 68.32 | b | 74.43 | c | 87.63 | c | 98.96 | f | 99.69 | b | 93.37 | 79.77 | a | 70.29 | f | 58.00 | f | 75.52 | c | |
1996 | 58.00 | g | 60.79 | e | 66.85 | e | 75.58 | f | 86.25 | c | 96.48 | i | 102.92 | f | 101.59 | i | 88.31 | a | 75.55 | 62.61 | b | 51.52 | 70.27 | e | ||
1997 | 49.86 | b | 60.57 | g | 72.72 | f | 72.85 | c | 88.81 | d | 91.93 | 96.36 | f | 98.00 | c | 87.34 | a | 76.47 | a | 64.66 | a | 51.53 | a | 75.72 | c | |
1998 | 54.44 | o | 51.43 | 61.19 | j | 65.04 | b | 73.92 | g | 86.47 | o | 98.47 | n | 100.47 | n | 90.73 | o | 74.86 | q | 61.73 | s | 59.62 | w | 58.23 | j | |
1999 | 59.85 | r | 58.80 | r | 70.53 | n | 69.11 | k | 80.88 | o | ----- | z | 96.44 | m | 95.95 | i | 93.23 | q | 86.55 | t | ----- | z | 58.19 | o | ----- | z |
2000 | 58.47 | p | 61.75 | q | 65.00 | q | 83.54 | q | 87.33 | d | 97.73 | h | 100.11 | m | 98.38 | j | 90.55 | h | 74.42 | l | 55.89 | u | ----- | z | 87.33 | k |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 90.33 | x | 99.17 | m | 99.67 | p | 94.27 | o | 84.75 | s | 65.31 | n | 51.41 | n | ----- | z |
2002 | 52.59 | n | 62.71 | k | 68.33 | s | 83.15 | q | 87.40 | u | 98.25 | n | 102.52 | j | 99.30 | k | 94.00 | q | 76.82 | n | 65.37 | c | 52.21 | l | 65.37 | k |
2003 | 61.67 | d | 56.15 | b | 64.89 | c | 69.46 | d | 82.92 | f | 95.70 | g | 103.70 | a | 97.11 | c | 93.23 | 84.97 | a | 57.82 | b | 52.19 | 74.12 | b | ||
2004 | 52.97 | 51.24 | 73.86 | c | 74.86 | a | 83.33 | d | 93.60 | 98.35 | 96.13 | a | 90.00 | c | 72.94 | 58.70 | 53.65 | 74.97 | ||||||||
2005 | 54.06 | 55.79 | 64.68 | 70.38 | a | 85.07 | c | 91.39 | g | 102.42 | 95.35 | k | 88.73 | d | 78.08 | e | 67.43 | b | 55.77 | i | 74.07 | c | ||||
2006 | 55.71 | g | 65.21 | i | 59.00 | d | 70.20 | t | 90.48 | h | 100.46 | f | 101.65 | 98.19 | 89.10 | a | 74.84 | 65.57 | 53.52 | 77.41 | e | |||||
2007 | 53.32 | ----- | z | 73.19 | 77.20 | 87.43 | a | 96.87 | 103.69 | b | 99.23 | 91.17 | 78.29 | 71.40 | 50.61 | 80.22 | a | |||||||||
2008 | 51.42 | 58.93 | 69.35 | 75.23 | 80.67 | s | 102.07 | p | 101.87 | 101.48 | 93.37 | 80.84 | 69.40 | 51.71 | 75.36 | b | ||||||||||
2009 | 57.45 | 57.32 | 67.42 | 73.87 | 90.68 | 89.17 | a | 102.53 | a | 99.42 | 95.07 | 73.35 | 66.73 | 49.59 | d | 76.88 | ||||||||||
2010 | 53.39 | 56.39 | 63.74 | 70.43 | 77.29 | 94.17 | 102.06 | ----- | z | ----- | z | 75.94 | 60.63 | 53.00 | 70.70 | b | ||||||||||
2011 | 51.74 | h | 56.54 | 64.26 | 73.04 | e | 76.17 | h | 91.00 | 97.30 | a | 99.48 | 91.97 | 77.65 | 60.13 | 54.00 | 76.54 | b | ||||||||
2012 | 57.19 | 57.97 | 65.87 | 75.20 | 86.35 | 96.33 | 92.03 | 96.29 | 91.60 | 78.74 | 67.00 | 51.70 | a | 76.36 | ||||||||||||
2013 | 51.10 | 57.50 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.10 | k | |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | 59.62 | b | 66.89 | a | 67.45 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.25 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 53.44 | 58.53 | 65.22 | 72.47 | 82.75 | 92.06 | 98.69 | 96.59 | 89.62 | 77.66 | 63.22 | 52.77 | 74.72 | |||||||||||||
S.D. | 4.04 | 4.14 | 4.43 | 4.71 | 4.39 | 3.65 | 3.09 | 2.83 | 2.91 | 4.09 | 3.80 | 3.94 | 1.67 | |||||||||||||
SKEW | 0.21 | 0.15 | 0.14 | -0.12 | -0.13 | -0.11 | -0.04 | -0.48 | -0.35 | 0.15 | 0.00 | 0.62 | 0.59 | |||||||||||||
MAX | 62.68 | 66.89 | 73.86 | 81.83 | 91.69 | 97.78 | 103.70 | 101.48 | 95.07 | 86.64 | 71.40 | 63.58 | 77.68 | |||||||||||||
MIN | 43.83 | 51.24 | 55.97 | 61.97 | 74.03 | 83.73 | 92.03 | 89.23 | 83.14 | 68.83 | 55.87 | 46.69 | 72.87 | |||||||||||||
YRS | 39 | 38 | 36 | 36 | 34 | 36 | 32 | 34 | 36 | 37 | 39 | 37 | 15 |