YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 100.83 | r | 88.87 | 73.57 | 64.35 | 75.60 | i | |||
1952 | 64.16 | 69.93 | 70.06 | 84.17 | 97.68 | 101.73 | 105.67 | j | 105.58 | 103.20 | 99.93 | q | 67.00 | i | 64.52 | 84.56 | c | |||||||||
1953 | 71.23 | 71.43 | 78.10 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.69 | q | 66.67 | a | 71.86 | h | ||
1954 | 66.94 | 79.36 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.15 | j | ||
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | 69.24 | h | 81.87 | 83.13 | 94.90 | 104.93 | a | 105.48 | 104.87 | 105.24 | a | 87.70 | a | 77.23 | 70.20 | a | 91.56 | b | ||||||
1957 | ----- | z | 75.29 | n | 76.77 | 83.72 | a | 89.65 | 105.70 | 108.68 | c | 103.42 | 101.30 | 83.58 | 69.83 | 71.20 | a | 89.39 | b | |||||||
1958 | 69.13 | 72.21 | 69.58 | 84.50 | 99.61 | 104.52 | a | 108.45 | b | 106.23 | 100.57 | 93.00 | e | 76.79 | a | 74.71 | 88.27 | |||||||||
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 102.12 | n | 98.17 | 92.33 | d | 77.04 | c | 66.00 | 83.38 | h | ||
1960 | 60.68 | ----- | z | 82.90 | ----- | z | ----- | z | 108.36 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.98 | i | ||
1961 | ----- | z | 73.44 | a | 76.00 | b | 85.53 | 91.10 | a | 103.32 | e | 105.62 | g | 101.81 | 94.90 | 87.06 | 71.23 | 65.13 | 84.95 | b | ||||||
1962 | 66.24 | b | 68.79 | 71.32 | 89.79 | a | 88.00 | 98.80 | 103.87 | 105.71 | 97.17 | 87.48 | 79.37 | 70.26 | 85.57 | |||||||||||
1963 | 64.48 | 77.64 | 76.67 | a | 79.60 | 93.39 | 96.13 | 104.48 | 100.09 | h | ----- | z | ----- | z | ----- | z | ----- | z | 84.63 | e | ||||||
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | 69.93 | 71.74 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.18 | h | 65.16 | 68.94 | i | |||
1966 | 62.71 | 64.43 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.57 | j | ||
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | 73.17 | a | 85.97 | 88.79 | c | 106.34 | a | 110.00 | c | 105.11 | d | ----- | z | 92.88 | g | ----- | z | 77.87 | a | 92.46 | e | |
1981 | 78.18 | t | ----- | z | ----- | z | 89.13 | 92.29 | 107.30 | 107.13 | 107.13 | 100.85 | d | 84.48 | 79.97 | 70.65 | 93.21 | c | ||||||||
1982 | 65.11 | c | 72.04 | d | 71.10 | a | 84.62 | a | 93.55 | b | 100.10 | 104.53 | a | 104.00 | 97.10 | 87.06 | 71.13 | 62.87 | 84.44 | |||||||
1983 | 66.61 | 67.67 | a | 72.13 | 78.43 | 94.10 | 101.07 | 107.53 | a | 103.29 | ----- | z | 86.62 | e | 74.45 | a | 67.32 | f | 85.19 | b | ||||||
1984 | 69.71 | 73.10 | 81.27 | a | 85.10 | 101.03 | b | ----- | z | ----- | z | 102.50 | c | 98.85 | c | 82.80 | a | 72.90 | 63.48 | h | 85.25 | c | ||||
1985 | 62.19 | e | 67.37 | a | 74.16 | 89.59 | a | 95.97 | b | 106.59 | c | 108.18 | c | 107.52 | b | 92.75 | b | 86.31 | b | 70.17 | a | 66.48 | d | 85.61 | ||
1986 | 72.13 | a | 70.48 | a | 80.21 | b | 85.29 | b | 95.45 | 105.28 | a | 103.03 | a | 104.19 | 93.50 | 84.83 | b | 75.10 | a | 65.00 | 86.21 | |||||
1987 | 64.32 | 68.86 | 73.23 | a | ----- | z | 92.26 | 105.45 | a | 104.77 | 103.37 | a | 98.22 | c | 92.25 | c | 71.30 | 59.32 | 84.85 | a | ||||||
1988 | 62.97 | 72.28 | 78.97 | b | 83.36 | e | 94.36 | c | 102.75 | b | 106.58 | 102.29 | 97.70 | 93.20 | a | 73.86 | a | 64.58 | 86.07 | |||||||
1989 | 62.43 | a | 70.85 | a | 81.30 | a | 92.38 | a | 94.16 | 103.10 | 107.74 | 103.29 | 100.50 | 86.57 | a | 76.38 | a | 66.13 | 87.07 | |||||||
1990 | 63.87 | 66.43 | 77.26 | 86.38 | a | 90.74 | 105.37 | 103.94 | 101.32 | 100.00 | j | ----- | z | 77.67 | l | 64.07 | a | 84.37 | c | |||||||
1991 | 65.48 | 77.39 | 70.37 | a | 84.63 | 92.32 | 100.66 | a | 106.13 | 104.43 | a | 99.03 | a | 91.39 | 74.31 | a | 66.30 | a | 86.04 | |||||||
1992 | 66.03 | 69.97 | 72.90 | b | 89.66 | a | 95.03 | 102.30 | c | 104.90 | 104.41 | b | 101.60 | 90.10 | b | 72.39 | b | 60.93 | a | 85.85 | ||||||
1993 | 63.97 | b | 65.50 | b | 78.69 | b | 85.52 | c | 96.74 | 103.79 | f | 105.17 | a | ----- | z | ----- | z | 93.08 | r | ----- | z | ----- | z | 82.60 | f | |
1994 | 74.12 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | 90.57 | q | 84.58 | d | 95.90 | b | 103.00 | a | 105.00 | t | ----- | z | ----- | z | 75.12 | w | 70.09 | h | 66.59 | n | 94.49 | i |
2005 | 65.61 | c | 66.53 | m | 73.60 | k | 86.12 | n | 94.86 | i | 102.34 | a | 109.97 | b | 104.17 | b | 99.74 | k | 88.50 | e | 82.38 | q | ----- | z | 94.12 | g |
2006 | 69.42 | s | 76.46 | d | 74.21 | g | 87.25 | j | 99.45 | b | 107.93 | 109.36 | f | 105.26 | d | 97.56 | c | 87.10 | 80.03 | a | 66.93 | d | 90.09 | d | ||
2007 | 65.33 | g | 72.91 | e | 82.22 | h | 87.08 | f | 97.27 | a | 106.53 | 108.06 | 106.88 | e | 100.70 | 90.29 | 81.10 | 61.55 | 91.70 | c | ||||||
2008 | 63.29 | 68.30 | f | 80.44 | d | 87.35 | g | 92.92 | g | 108.50 | d | 107.00 | g | 106.00 | b | 101.73 | 91.39 | 79.00 | 64.32 | 86.83 | d | |||||
2009 | 70.32 | 71.54 | 80.65 | 85.40 | 100.19 | 100.27 | 110.61 | 108.32 | 103.17 | 87.13 | 80.07 | 63.77 | 88.45 | |||||||||||||
2010 | 67.61 | 68.82 | 74.32 | 83.87 | 92.61 | 105.25 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 82.08 | f | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 65.72 | 71.15 | 75.97 | 85.41 | 94.48 | 103.84 | 106.63 | 104.63 | 99.23 | 88.26 | 75.33 | 66.36 | 86.36 | |||||||||||||
S.D. | 3.02 | 3.76 | 4.19 | 3.16 | 3.46 | 3.08 | 2.23 | 1.83 | 3.17 | 3.02 | 3.57 | 4.18 | 1.24 | |||||||||||||
SKEW | 0.56 | 0.41 | 0.05 | 0.09 | 0.10 | -0.50 | 0.18 | 0.15 | -0.29 | 0.08 | 0.08 | 0.98 | 0.51 | |||||||||||||
MAX | 72.13 | 79.36 | 82.90 | 92.38 | 101.03 | 108.50 | 110.61 | 108.32 | 105.24 | 93.20 | 81.10 | 77.87 | 88.45 | |||||||||||||
MIN | 60.68 | 64.43 | 69.58 | 78.43 | 88.00 | 96.13 | 103.03 | 101.32 | 92.75 | 82.80 | 69.83 | 59.32 | 84.44 | |||||||||||||
YRS | 24 | 25 | 26 | 23 | 26 | 27 | 21 | 24 | 21 | 23 | 22 | 25 | 10 |