YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 101.97 | 100.38 | e | 95.03 | 83.90 | 68.20 | 54.13 | 83.94 | f | |||||
1949 | 45.52 | 59.15 | b | 67.03 | 84.47 | 85.68 | 100.45 | a | 104.45 | 100.06 | 97.03 | 79.97 | 76.50 | 56.87 | 79.77 | |||||||||||
1950 | 55.32 | 65.32 | 74.00 | t | 82.73 | 87.94 | 96.13 | 103.48 | 102.58 | 90.77 | 86.48 | 74.23 | 67.74 | 82.98 | a | |||||||||||
1951 | 59.42 | 63.46 | 70.52 | 78.17 | 87.23 | 96.33 | 104.10 | 100.35 | 98.10 | 80.74 | 67.93 | 57.44 | o | 82.40 | a | |||||||||||
1952 | 50.88 | n | ----- | z | 62.15 | d | 77.87 | 90.00 | 91.40 | 102.55 | 103.00 | 95.10 | 89.45 | 64.70 | 56.55 | 83.28 | b | |||||||||
1953 | 64.97 | 65.25 | 71.24 | b | 76.70 | 77.15 | d | 93.30 | 105.23 | 99.13 | a | 97.59 | a | 81.65 | 68.77 | 60.00 | a | 80.08 | ||||||||
1954 | 60.23 | 70.46 | 64.53 | a | 82.33 | 92.74 | 94.50 | 103.84 | 97.61 | 94.67 | 84.42 | 70.90 | 56.48 | 81.06 | ||||||||||||
1955 | 53.13 | 58.64 | 70.48 | 74.36 | b | 85.68 | 95.20 | 100.26 | 103.00 | 95.77 | 85.52 | 68.27 | 60.32 | c | 79.22 | |||||||||||
1956 | 61.32 | 60.45 | 73.06 | 74.00 | 84.55 | 98.37 | 100.19 | 98.81 | 97.93 | 79.42 | 69.90 | 62.80 | a | 80.07 | ||||||||||||
1957 | 52.93 | b | 68.57 | 70.58 | 77.27 | 81.50 | a | 99.07 | 101.97 | a | 99.52 | 93.43 | 75.90 | 63.87 | 59.74 | 78.70 | ||||||||||
1958 | 61.29 | 64.57 | 62.10 | 75.53 | 89.77 | 93.40 | 101.23 | a | 103.29 | 95.07 | 86.29 | 69.45 | a | 64.52 | 80.54 | |||||||||||
1959 | 62.26 | 60.07 | 74.81 | 83.83 | 84.16 | 100.20 | 107.03 | 99.81 | 90.67 | 85.26 | 71.17 | 60.26 | 81.63 | |||||||||||||
1960 | 52.16 | 60.00 | 76.55 | 76.38 | i | 86.94 | 101.83 | 104.10 | 102.13 | 96.70 | 81.26 | 65.50 | 59.23 | 80.58 | a | |||||||||||
1961 | 62.13 | 66.82 | 71.16 | 80.07 | 83.48 | 100.87 | 105.13 | 99.42 | 90.10 | 81.74 | 64.37 | 57.13 | 80.20 | |||||||||||||
1962 | 59.06 | 59.61 | 63.74 | 83.67 | 82.48 | 95.93 | 100.45 | 101.48 | 96.13 | 84.35 | 72.45 | a | 62.87 | 80.19 | ||||||||||||
1963 | 58.39 | 71.64 | 66.58 | 70.13 | 87.68 | 91.50 | 101.29 | 99.19 | 93.43 | 82.16 | 67.73 | 61.17 | b | 79.24 | ||||||||||||
1964 | 58.43 | a | 64.71 | a | 67.84 | 75.87 | 83.71 | ----- | z | 103.06 | 101.27 | a | 93.24 | a | 88.42 | 62.97 | 61.48 | 78.27 | a | |||||||
1965 | 62.39 | 67.15 | a | 68.62 | b | 71.97 | 83.10 | b | ----- | z | 100.00 | 100.23 | a | 88.20 | 89.23 | 66.80 | 55.45 | 77.56 | a | |||||||
1966 | 56.83 | a | 59.96 | 73.16 | 82.93 | ----- | z | 96.77 | 100.68 | 103.35 | 93.23 | 83.29 | 68.90 | 59.71 | 79.89 | a | ||||||||||
1967 | 60.70 | a | 68.25 | 70.67 | a | 64.73 | 86.26 | 91.90 | 104.27 | a | 104.00 | 91.83 | 86.74 | 71.43 | 55.19 | 79.66 | ||||||||||
1968 | 59.58 | 68.11 | a | 70.71 | 76.37 | 86.52 | ----- | z | 102.07 | a | 95.61 | 93.67 | 82.53 | a | ----- | z | 54.48 | d | 78.96 | b | ||||||
1969 | 60.10 | a | 56.61 | 67.10 | 77.57 | b | 89.74 | 93.28 | a | 102.55 | 104.68 | 96.28 | a | 78.13 | a | 68.60 | 61.81 | 79.70 | ||||||||
1970 | 58.17 | b | 66.46 | b | 74.00 | k | 73.66 | a | 88.87 | 96.97 | 104.33 | a | 103.84 | 92.87 | 80.48 | 69.55 | a | 54.42 | 80.87 | a | ||||||
1971 | 60.84 | 67.29 | 71.57 | a | 76.90 | a | 81.77 | 95.67 | 104.84 | 103.00 | 94.63 | 78.45 | 66.53 | 53.83 | a | 79.61 | ||||||||||
1972 | 58.32 | 69.52 | 80.35 | 79.80 | 89.00 | 96.73 | 106.97 | 100.32 | 91.00 | a | 76.42 | 64.20 | 54.87 | 80.63 | ||||||||||||
1973 | 55.76 | b | 61.11 | 64.17 | a | 77.57 | 90.50 | a | ----- | z | ----- | z | 100.68 | 93.57 | 82.97 | a | 67.83 | ----- | z | 77.13 | c | |||||
1974 | 54.87 | h | 66.18 | 71.58 | 77.27 | 89.52 | 100.48 | a | 101.61 | 100.29 | 98.53 | 81.39 | 68.67 | 57.10 | 82.96 | a | ||||||||||
1975 | 60.97 | a | 63.68 | 67.10 | a | 68.87 | 87.65 | 97.77 | 102.71 | 100.32 | 96.13 | 80.94 | 68.57 | 65.29 | 80.00 | |||||||||||
1976 | 64.48 | 65.79 | 69.65 | 74.90 | 90.61 | 96.17 | 101.60 | a | 96.39 | 89.53 | 83.03 | 74.90 | 62.55 | 80.80 | ||||||||||||
1977 | 58.67 | a | 71.04 | 65.90 | a | 81.55 | a | 77.00 | 98.61 | b | 103.50 | a | 101.59 | b | 92.60 | 85.77 | a | 73.87 | 63.39 | 81.12 | ||||||
1978 | 59.00 | 63.74 | a | 70.83 | a | ----- | z | 86.90 | a | 96.72 | a | 103.52 | 101.16 | 91.13 | 88.29 | 66.07 | 56.43 | a | 80.35 | a | ||||||
1979 | 52.10 | 61.33 | a | 69.65 | 78.83 | a | 88.29 | 98.60 | 103.55 | 99.52 | ----- | z | 84.06 | 67.63 | 62.24 | b | 78.71 | a | ||||||||
1980 | 63.35 | 66.79 | ----- | z | 77.87 | 81.68 | 94.62 | a | ----- | z | ----- | z | 95.14 | a | 85.84 | 73.14 | a | 67.73 | a | 78.46 | c | |||||
1981 | 63.81 | ----- | z | 68.48 | 82.93 | 88.57 | a | 102.90 | 105.16 | 105.16 | 96.27 | 78.48 | 71.96 | b | 63.32 | 84.28 | a | |||||||||
1982 | 60.88 | f | 67.36 | 66.30 | a | 76.62 | a | 89.55 | b | 93.59 | c | 100.70 | a | 100.23 | e | 91.18 | b | 80.48 | b | 64.70 | c | 56.90 | b | 80.69 | a | |
1983 | 61.34 | b | 63.07 | a | 67.26 | 70.74 | c | 87.93 | a | 95.00 | d | 99.03 | b | 96.12 | e | 95.11 | b | 81.32 | l | 67.58 | d | 60.72 | b | 78.54 | a | |
1984 | 64.04 | c | 67.04 | b | 74.24 | b | 77.37 | 94.79 | c | 95.60 | e | 101.69 | b | 99.48 | b | 96.30 | c | 77.32 | c | 66.82 | b | 50.52 | b | 80.43 | ||
1985 | 59.56 | d | 64.52 | a | 68.90 | b | 84.70 | c | 88.07 | a | 101.74 | c | 105.52 | b | 102.13 | a | 88.92 | e | 82.86 | b | 64.89 | b | 61.37 | a | 81.10 | |
1986 | 66.21 | c | 67.14 | 75.48 | b | 78.23 | d | 90.11 | c | 100.00 | c | 99.56 | d | 103.96 | d | 87.46 | d | 82.71 | c | 72.59 | c | 60.89 | c | 82.03 | ||
1987 | 57.76 | b | 65.92 | b | 70.67 | p | 79.70 | t | 86.25 | g | 98.96 | b | 98.30 | a | 101.39 | c | 95.29 | b | 86.46 | e | 67.48 | c | 54.50 | a | 80.67 | c |
1988 | 58.53 | a | 70.27 | c | 75.35 | 78.04 | b | 87.69 | b | 95.41 | c | ----- | z | 101.32 | c | ----- | z | 91.23 | a | 70.11 | b | 59.84 | 78.78 | b | ||
1989 | 58.50 | c | 61.74 | a | 76.58 | 88.04 | c | 87.64 | c | 97.07 | c | 104.93 | a | 98.69 | e | 93.24 | e | 81.68 | f | 74.03 | a | 66.29 | c | 82.43 | a | |
1990 | 62.26 | d | 65.38 | b | 76.14 | b | 83.23 | d | 86.54 | e | 98.70 | c | 103.17 | b | 99.56 | d | 95.16 | e | 87.07 | d | 71.65 | d | 55.36 | c | 82.02 | |
1991 | 61.15 | d | 73.93 | 63.46 | e | 77.09 | h | 81.67 | d | 94.20 | e | 102.29 | g | 99.63 | d | 96.73 | d | 88.64 | f | 71.33 | c | 61.42 | 78.17 | c | ||
1992 | 60.61 | c | 65.42 | c | 67.93 | b | 82.83 | a | 89.69 | b | 94.65 | d | 99.93 | d | 102.96 | c | 96.25 | b | 84.88 | e | 67.61 | b | 55.26 | d | 80.67 | |
1993 | 54.16 | f | 60.75 | d | 75.22 | d | 80.75 | b | 88.14 | c | 94.39 | b | 100.10 | b | 99.79 | c | 95.17 | a | 84.56 | d | 67.48 | a | 62.23 | a | 82.60 | a |
1994 | 65.03 | a | 60.21 | 76.41 | b | 79.31 | d | 85.27 | e | 101.00 | a | 104.16 | f | 104.23 | a | 93.27 | 80.45 | 61.30 | 60.87 | 78.85 | a | |||||
1995 | 55.29 | 73.21 | 68.74 | 76.48 | a | 80.58 | e | 92.03 | a | 101.90 | 102.41 | d | 97.43 | b | 87.24 | b | 77.37 | 63.68 | c | 81.36 | ||||||
1996 | 64.23 | 67.00 | c | 73.20 | a | 82.07 | a | 87.50 | e | 99.86 | b | 106.00 | f | 105.30 | a | 95.17 | 83.89 | d | 71.82 | b | 62.13 | 81.11 | a | |||
1997 | 62.48 | b | 70.39 | 81.45 | b | 80.24 | a | 94.58 | 95.23 | d | 99.77 | e | 102.00 | a | 94.28 | a | 82.59 | d | 69.76 | a | 57.70 | a | 82.54 | |||
1998 | 60.73 | a | 58.65 | b | 70.60 | a | 72.93 | a | 77.10 | b | 92.04 | b | 104.33 | a | 104.76 | b | 90.86 | a | 80.33 | d | 68.65 | g | 62.86 | b | 79.56 | a |
1999 | 64.20 | a | 66.96 | a | 71.10 | b | 72.12 | d | 86.26 | 95.77 | 100.62 | b | 99.28 | b | 96.54 | b | 89.80 | a | 73.66 | a | 65.60 | a | 81.82 | |||
2000 | 64.07 | b | 65.08 | d | 72.70 | a | 83.56 | e | 93.41 | d | 101.04 | b | 103.17 | b | 102.23 | a | 95.61 | b | 81.43 | c | 67.14 | b | 65.45 | b | 82.91 | |
2001 | 60.54 | e | 59.76 | c | 75.55 | 76.67 | c | 96.66 | b | 100.50 | 102.04 | f | 105.00 | e | 97.17 | f | 88.61 | c | 69.65 | g | 58.78 | d | 80.23 | c | ||
2002 | 60.56 | d | 70.15 | b | 70.79 | b | ----- | z | 89.17 | a | 98.62 | n | ----- | z | 104.52 | j | 96.88 | e | ----- | z | 71.45 | a | 59.28 | b | 74.04 | e |
2003 | 69.74 | h | 63.91 | f | 74.07 | a | 73.20 | e | 90.59 | d | 99.82 | b | ----- | z | 101.80 | a | 99.81 | c | 92.07 | d | 63.35 | d | 60.00 | d | 83.86 | c |
2004 | 62.36 | f | ----- | z | ----- | z | 81.60 | j | 89.43 | c | 98.25 | b | 102.86 | b | 101.31 | b | 93.96 | d | 78.20 | f | 64.12 | f | 59.59 | d | 90.90 | f |
2005 | 59.22 | d | 61.04 | e | 70.36 | f | 75.11 | c | 88.31 | e | 93.16 | e | 105.18 | i | 100.89 | c | 89.96 | c | 81.12 | g | 72.78 | c | 61.70 | d | 78.02 | c |
2006 | 61.38 | b | 70.75 | t | 61.79 | c | 74.79 | b | 91.53 | n | 99.45 | j | 106.43 | j | 99.92 | f | 95.47 | k | 79.39 | 72.07 | a | 59.03 | a | 68.07 | f | |
2007 | 58.75 | g | 66.35 | b | 75.45 | i | 80.85 | c | 89.39 | 97.97 | 104.97 | b | 102.93 | d | 91.70 | 80.76 | f | 74.00 | h | 55.36 | c | 86.19 | d | |||
2008 | 52.52 | d | 63.25 | a | 72.00 | b | 77.97 | 85.27 | a | 97.10 | 103.89 | d | 103.29 | 96.36 | e | 83.38 | j | 73.04 | f | 51.92 | r | 83.52 | c | |||
2009 | 63.04 | f | 60.57 | g | 69.64 | c | 75.52 | c | 93.20 | f | 91.00 | 106.48 | j | 99.93 | c | 97.87 | g | 78.59 | d | 70.71 | i | 55.50 | c | 78.36 | f | |
2010 | 56.60 | a | 62.44 | c | 68.52 | 72.93 | 78.95 | i | 92.83 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.12 | h | ||
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 59.60 | 64.98 | 70.46 | 77.77 | 87.05 | 96.72 | 102.64 | 101.22 | 94.18 | 83.43 | 69.14 | 59.69 | 80.63 | |||||||||||||
S.D. | 3.95 | 4.03 | 4.41 | 4.49 | 4.11 | 3.07 | 2.07 | 2.22 | 2.77 | 3.82 | 3.56 | 3.83 | 1.06 | |||||||||||||
SKEW | -1.07 | 0.06 | 0.12 | -0.27 | -0.42 | 0.01 | -0.01 | -0.23 | -0.45 | 0.20 | 0.09 | 0.00 | 0.35 | |||||||||||||
MAX | 66.21 | 73.93 | 81.45 | 88.04 | 96.66 | 102.90 | 107.03 | 105.30 | 99.81 | 92.07 | 77.37 | 67.74 | 82.91 | |||||||||||||
MIN | 45.52 | 56.61 | 61.79 | 64.73 | 77.00 | 91.00 | 98.30 | 95.61 | 87.46 | 75.90 | 61.30 | 50.52 | 78.70 | |||||||||||||
YRS | 54 | 56 | 55 | 56 | 57 | 55 | 50 | 59 | 57 | 54 | 55 | 59 | 27 |