YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 96.83 | 85.03 | 76.33 | 68.39 | 81.65 | h | ||||
1921 | 66.97 | a | 74.82 | 81.06 | 84.77 | 89.45 | 101.33 | 104.65 | 102.55 | 100.47 | 90.13 | 80.30 | 69.87 | a | 87.20 | |||||||||||
1922 | 62.94 | 69.00 | 73.45 | 80.47 | 94.26 | 102.43 | 104.97 | 103.06 | 102.83 | 91.00 | 75.27 | 71.45 | 85.93 | |||||||||||||
1923 | 73.52 | 73.11 | 77.55 | 83.47 | 95.77 | 96.73 | 103.48 | 104.00 | a | 97.28 | a | 89.45 | 79.37 | 67.58 | 86.78 | |||||||||||
1924 | 70.77 | 81.93 | 77.06 | 83.45 | a | 96.90 | a | 104.83 | 106.10 | 106.03 | 102.63 | 89.74 | 81.53 | 67.74 | 89.06 | |||||||||||
1925 | 70.71 | 79.50 | 82.77 | 87.03 | 95.48 | 99.93 | 107.10 | 104.23 | 99.17 | 84.43 | a | 76.80 | 72.17 | a | 88.28 | |||||||||||
1926 | 69.23 | 77.14 | 81.68 | 87.07 | 93.65 | 104.10 | 106.45 | 105.00 | 98.93 | 92.35 | 81.86 | a | 64.52 | 88.50 | ||||||||||||
1927 | 70.26 | 75.57 | 79.06 | 88.00 | 96.35 | 101.23 | 106.55 | 103.87 | 98.57 | 91.00 | 79.27 | 65.84 | 87.96 | |||||||||||||
1928 | 70.68 | 73.76 | 83.03 | 88.93 | 96.03 | 102.87 | 106.97 | 105.48 | 104.00 | a | 91.23 | a | 78.03 | a | 69.26 | 89.19 | ||||||||||
1929 | 67.40 | a | 71.79 | 79.73 | a | 83.63 | 97.00 | 102.70 | 107.10 | 106.39 | 99.30 | 92.58 | 75.90 | ----- | z | 89.41 | a | |||||||||
1930 | 67.29 | q | 78.82 | 78.19 | 89.03 | 87.74 | 102.70 | 106.55 | b | 105.26 | 97.71 | b | 88.74 | 78.17 | a | 68.23 | a | 89.20 | a | |||||||
1931 | 69.77 | a | 70.86 | 81.16 | 88.67 | 96.13 | 101.37 | 108.58 | 102.93 | a | 98.10 | 88.84 | 73.07 | 64.81 | 87.02 | |||||||||||
1932 | 63.90 | 69.55 | 80.29 | 87.13 | 93.84 | 100.73 | 105.45 | 106.29 | 103.83 | 87.65 | 81.43 | 62.97 | 86.92 | |||||||||||||
1933 | 63.55 | 65.29 | 80.42 | 81.87 | 87.87 | 101.93 | 108.16 | 106.35 | 102.33 | 95.10 | 81.43 | 71.00 | 87.11 | |||||||||||||
1934 | 72.23 | 77.63 | a | 89.77 | 92.47 | 99.00 | 97.40 | 106.81 | 104.65 | 101.40 | 93.10 | 79.77 | 69.87 | 90.34 | ||||||||||||
1935 | 66.45 | 72.68 | 74.84 | 85.23 | 89.55 | 105.20 | 104.97 | 102.35 | 101.47 | 89.29 | 74.00 | 69.39 | 86.28 | |||||||||||||
1936 | 69.29 | 72.72 | 83.03 | 89.53 | 97.87 | 103.17 | 105.90 | 105.71 | 99.73 | 89.23 | 77.43 | 69.48 | 88.59 | |||||||||||||
1937 | 56.52 | 70.86 | 77.52 | 85.93 | 94.48 | 101.30 | 107.35 | 107.67 | a | 103.87 | 93.13 | 81.40 | 72.70 | a | 87.73 | |||||||||||
1938 | 71.68 | 70.21 | 74.90 | 85.83 | 92.48 | 101.80 | 104.77 | 105.23 | 103.27 | 87.81 | 73.60 | 69.74 | 86.78 | |||||||||||||
1939 | 67.35 | 64.61 | 78.42 | ----- | z | 94.73 | a | 102.13 | 106.77 | 106.00 | 95.70 | 88.26 | 79.90 | 74.39 | 87.12 | a | ||||||||||
1940 | 72.55 | 72.03 | 81.14 | c | 86.70 | 98.10 | 104.27 | 107.58 | 106.65 | 99.00 | 90.19 | 75.63 | 70.26 | 88.67 | ||||||||||||
1941 | 66.16 | 73.57 | 76.71 | 79.70 | 94.52 | 98.57 | 105.94 | 101.55 | 97.13 | 84.77 | 78.43 | 69.45 | 85.54 | |||||||||||||
1942 | 69.58 | 69.61 | 76.10 | 82.57 | 92.00 | 101.97 | 109.58 | 104.29 | 102.10 | 90.77 | 81.07 | 72.94 | 87.71 | |||||||||||||
1943 | 70.29 | 76.07 | 81.29 | 88.70 | 96.94 | 99.47 | 108.52 | 104.77 | 104.40 | 92.16 | 79.63 | 68.16 | 89.20 | |||||||||||||
1944 | 67.39 | 66.69 | 75.87 | 82.83 | 92.16 | 96.43 | 106.97 | a | 107.52 | 101.40 | 91.97 | 71.83 | 69.48 | 85.88 | ||||||||||||
1945 | 66.39 | 72.18 | 72.39 | 84.37 | 93.48 | 99.03 | 107.72 | b | 104.35 | 101.40 | 91.23 | 77.17 | 67.52 | 86.44 | ||||||||||||
1946 | 68.74 | 73.21 | 79.45 | 89.70 | 93.74 | 104.73 | 104.81 | 104.71 | 101.50 | 85.97 | 73.00 | 71.32 | 87.57 | |||||||||||||
1947 | 67.61 | 78.57 | 80.58 | 86.63 | 95.74 | 99.33 | 107.13 | 103.35 | 102.30 | 91.68 | 74.50 | 68.06 | 87.96 | |||||||||||||
1948 | 72.26 | 71.59 | 73.55 | 88.27 | 94.10 | 100.03 | 106.29 | 107.03 | 102.97 | 89.90 | 74.77 | 65.32 | 87.17 | |||||||||||||
1949 | 56.68 | 68.29 | 77.65 | 89.50 | 92.90 | a | 102.27 | 106.29 | 105.97 | 104.53 | 87.65 | 84.63 | 67.84 | 87.02 | ||||||||||||
1950 | 66.32 | 76.64 | 81.68 | 90.20 | 92.03 | 99.97 | 102.74 | 107.10 | a | 99.30 | 95.58 | 82.90 | 76.58 | 89.25 | ||||||||||||
1951 | 68.77 | 70.93 | a | 77.52 | 84.77 | 94.17 | a | 100.80 | 106.77 | 103.61 | 104.00 | 90.87 | 76.20 | 66.65 | 87.09 | |||||||||||
1952 | 65.03 | 72.28 | 72.81 | 85.60 | 99.16 | 99.69 | a | 106.45 | 107.73 | a | 103.63 | 99.23 | 75.33 | 66.74 | 87.81 | |||||||||||
1953 | 73.58 | 74.04 | 80.03 | 84.23 | 87.97 | 101.27 | 107.39 | 105.71 | 103.67 | 91.58 | 80.43 | 69.61 | 88.29 | |||||||||||||
1954 | 69.71 | 81.21 | 77.10 | b | ----- | z | 95.31 | r | 100.60 | 105.65 | 104.13 | 103.43 | 93.90 | b | 82.53 | 68.48 | 88.67 | b | ||||||||
1955 | 63.00 | 69.04 | a | 79.58 | 84.40 | 92.61 | 101.77 | 102.32 | 102.38 | b | 102.83 | 94.97 | 78.57 | 72.58 | 87.00 | |||||||||||
1956 | 72.79 | b | 68.93 | 82.35 | 84.77 | 94.29 | 103.42 | d | 104.40 | k | 105.85 | d | 106.12 | e | 90.07 | a | 77.90 | 71.77 | a | 87.11 | a | |||||
1957 | 66.87 | 77.86 | 79.00 | 86.03 | a | 89.67 | a | 104.44 | c | 108.14 | b | 103.41 | b | 101.66 | a | 85.81 | 73.42 | d | 71.44 | d | 87.31 | |||||
1958 | 71.78 | d | 74.29 | g | 73.62 | b | 88.40 | e | 99.70 | h | 102.12 | e | 109.09 | h | 105.12 | e | 102.62 | d | 94.70 | d | 77.42 | d | 77.00 | g | 89.47 | d |
1959 | 72.96 | d | 70.95 | f | 83.42 | 90.83 | 90.90 | 105.43 | 106.48 | 103.25 | c | 98.93 | 92.19 | 77.27 | 67.32 | 89.91 | a | |||||||||
1960 | 63.19 | 69.83 | 83.13 | 87.97 | a | 93.45 | 106.07 | 107.94 | 105.00 | 101.47 | 88.52 | 76.50 | 67.43 | a | 87.54 | |||||||||||
1961 | 70.03 | 74.79 | 78.70 | a | 87.93 | 91.58 | 103.27 | 104.03 | 103.52 | 96.93 | 89.13 | a | 72.27 | 66.61 | 86.57 | |||||||||||
1962 | 67.67 | d | 72.21 | 73.35 | 92.47 | 90.74 | 101.13 | 106.81 | 108.67 | a | 101.07 | 91.03 | a | 82.23 | 70.39 | 88.15 | ||||||||||
1963 | 64.29 | 80.39 | ----- | z | 80.90 | 95.13 | 97.23 | 106.74 | 102.52 | 102.37 | 91.32 | 76.63 | 70.94 | 88.04 | a | |||||||||||
1964 | 65.97 | 69.34 | 74.81 | 83.47 | 90.38 | b | 99.50 | 105.97 | a | 102.84 | 99.17 | 93.93 | a | 72.17 | 69.35 | 85.57 | ||||||||||
1965 | 68.13 | 72.82 | 74.97 | 83.50 | 90.97 | 95.13 | 104.71 | 104.97 | 96.93 | 94.45 | 77.40 | 64.71 | 85.72 | |||||||||||||
1966 | 63.83 | a | 67.88 | c | 79.65 | 88.67 | 95.87 | 101.20 | 105.29 | 105.94 | 101.53 | 88.87 | 79.43 | 70.65 | 87.40 | |||||||||||
1967 | 68.32 | 75.64 | 80.55 | 77.13 | 92.00 | 97.24 | a | 106.16 | 106.87 | 97.43 | 93.23 | 82.45 | a | ----- | z | 88.82 | a | |||||||||
1968 | 68.39 | 77.72 | 80.16 | 84.97 | 94.29 | 103.59 | a | 104.97 | 102.19 | 102.23 | 91.26 | 78.37 | 65.87 | 87.83 | ||||||||||||
1969 | 71.03 | 70.43 | 77.19 | 86.60 | 96.10 | 97.97 | 106.27 | a | 109.19 | 102.79 | a | 86.90 | 76.43 | 69.26 | 87.51 | |||||||||||
1970 | 68.48 | 74.86 | 77.29 | 81.27 | 95.35 | 102.57 | 107.48 | 106.39 | 99.50 | 87.42 | 78.17 | 67.39 | 87.18 | |||||||||||||
1971 | 68.97 | 74.54 | 80.55 | 83.20 | 88.10 | a | 100.67 | 107.06 | 102.77 | a | 101.37 | 83.32 | 75.73 | 64.35 | 85.89 | |||||||||||
1972 | 68.20 | a | 76.90 | 88.90 | 88.77 | 94.71 | 101.70 | 108.84 | 102.74 | 99.20 | 83.65 | 72.40 | 66.03 | 87.67 | ||||||||||||
1973 | 65.26 | 70.96 | 72.26 | 83.04 | c | 96.10 | 104.74 | c | 105.32 | 106.13 | 100.13 | 91.61 | 76.83 | 71.10 | 86.96 | |||||||||||
1974 | 66.55 | 72.79 | 79.90 | 87.43 | 95.26 | 106.63 | 103.52 | b | 107.04 | f | 102.79 | a | 90.00 | 77.27 | 66.42 | 86.23 | a | |||||||||
1975 | 69.00 | a | 71.32 | c | 75.93 | b | 77.37 | 92.23 | 101.25 | b | 104.42 | 107.55 | b | 102.42 | d | 88.13 | 78.23 | h | 69.16 | 87.16 | a | |||||
1976 | 69.32 | 73.31 | 77.00 | 81.77 | 94.94 | 103.60 | 103.58 | 104.13 | 94.70 | 88.71 | 79.00 | 70.16 | 86.68 | |||||||||||||
1977 | 66.97 | 77.86 | 74.81 | 87.97 | 86.74 | 105.13 | 107.58 | 103.90 | 100.40 | 92.74 | 80.43 | 71.87 | 88.03 | |||||||||||||
1978 | 66.23 | 72.00 | 79.71 | 83.47 | 94.61 | 107.60 | 108.65 | 105.84 | 98.27 | 93.87 | 73.93 | 63.00 | 87.26 | |||||||||||||
1979 | 60.77 | 70.54 | 76.68 | 87.13 | 91.71 | 103.60 | 107.48 | 102.97 | a | 105.47 | 93.19 | 75.30 | 72.06 | 87.24 | ||||||||||||
1980 | 69.77 | 74.34 | 75.87 | 85.33 | 88.23 | 103.30 | 107.65 | 105.29 | 101.10 | 91.55 | 79.07 | 73.90 | 87.95 | |||||||||||||
1981 | 72.65 | 75.39 | 77.23 | 88.60 | 92.74 | 106.53 | 106.87 | a | 107.68 | 102.23 | 86.32 | 80.23 | 72.03 | 89.04 | ||||||||||||
1982 | 66.87 | a | 73.29 | 75.42 | 85.50 | 92.10 | 99.50 | 105.32 | 103.71 | 98.43 | 87.32 | 73.00 | 65.58 | 85.50 | ||||||||||||
1983 | 69.73 | a | 70.93 | 76.52 | 81.37 | 94.84 | 101.33 | 106.84 | 101.58 | 101.33 | 88.68 | 76.67 | 68.74 | 86.55 | ||||||||||||
1984 | 69.29 | 73.59 | 81.74 | 83.77 | 100.06 | 100.13 | 103.29 | 102.00 | 101.13 | 84.74 | 74.00 | 62.81 | 86.38 | |||||||||||||
1985 | 65.45 | 69.07 | ----- | z | ----- | z | 94.55 | 104.63 | 105.77 | 105.32 | 92.80 | 86.00 | 72.33 | 68.06 | 86.40 | b | ||||||||||
1986 | 73.84 | 74.22 | a | 82.71 | 85.67 | 93.71 | 103.07 | 101.81 | 104.58 | 93.53 | 85.71 | 76.07 | 67.26 | 86.85 | ||||||||||||
1987 | 65.87 | a | 72.43 | 75.48 | 90.48 | a | 91.71 | 103.03 | 103.23 | 103.06 | 99.75 | b | 91.62 | b | 73.40 | 62.39 | 86.04 | |||||||||
1988 | 65.61 | 74.62 | 80.61 | 84.24 | a | 92.58 | 100.70 | 104.29 | 103.23 | 99.47 | 93.58 | 77.24 | a | 67.29 | 86.96 | |||||||||||
1989 | 63.97 | 71.39 | 83.23 | 92.90 | 94.26 | 102.40 | 107.24 | b | 103.26 | 102.75 | b | 90.43 | a | 79.43 | 69.90 | 88.43 | ||||||||||
1990 | 67.26 | 70.14 | 81.48 | 88.23 | 92.90 | b | 104.67 | 106.00 | 104.13 | 100.46 | b | 91.19 | 77.33 | 64.03 | 87.32 | |||||||||||
1991 | 66.65 | 78.36 | 71.68 | 84.73 | 90.74 | 97.27 | 102.84 | 103.68 | 99.50 | 93.48 | 76.37 | 65.30 | a | 85.88 | ||||||||||||
1992 | 66.45 | 73.66 | 75.87 | 89.50 | 95.03 | 101.10 | 104.74 | 107.23 | 103.17 | 92.42 | 75.17 | 64.10 | a | 87.37 | ||||||||||||
1993 | 65.77 | 69.29 | 81.23 | a | 90.27 | 96.52 | 103.37 | 104.32 | 104.97 | 101.90 | 91.19 | 74.00 | 68.52 | 87.61 | ||||||||||||
1994 | 71.55 | 69.93 | 80.55 | 87.07 | a | 91.03 | 105.10 | 107.13 | 106.52 | 101.97 | 88.67 | a | 71.00 | 66.00 | 87.21 | |||||||||||
1995 | 66.32 | 77.91 | e | 79.08 | f | 83.56 | c | 87.94 | 99.77 | 106.77 | 107.77 | 103.87 | 93.50 | a | 82.32 | e | 70.93 | a | 89.15 | a | ||||||
1996 | 71.38 | b | 75.83 | 79.73 | a | 88.17 | a | 97.30 | h | 104.38 | a | 107.23 | a | 107.43 | a | 98.38 | a | 89.92 | e | 79.07 | 70.27 | a | 88.34 | a | ||
1997 | 68.84 | 74.18 | 84.94 | 84.70 | 99.38 | b | 100.59 | a | 107.26 | d | 107.20 | a | 101.56 | e | 88.70 | a | 79.78 | g | 64.55 | b | 89.26 | a | ||||
1998 | 70.42 | 69.15 | a | 76.74 | 81.32 | b | 88.35 | h | 98.76 | e | 107.47 | a | 107.89 | d | 99.52 | e | 89.04 | g | 79.33 | o | 64.75 | w | 88.91 | d | ||
1999 | ----- | z | ----- | z | ----- | z | 84.25 | r | ----- | z | 99.84 | k | 103.92 | s | 104.95 | l | 102.69 | n | 98.92 | s | 86.33 | u | 73.12 | w | ----- | z |
2000 | 76.07 | q | 74.88 | u | 80.22 | v | 92.67 | u | 97.14 | q | 104.06 | m | ----- | z | 105.44 | o | ----- | z | ----- | z | 75.29 | w | 73.89 | v | ----- | z |
2001 | 70.43 | x | 67.50 | t | ----- | z | 82.56 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 93.56 | f | 80.04 | d | 65.91 | i | 80.04 | k |
2002 | 72.33 | p | 74.50 | t | 80.50 | y | 88.78 | g | 93.45 | i | 106.58 | k | 107.00 | m | 106.35 | n | 105.41 | m | 90.33 | j | 81.93 | p | 68.61 | h | ----- | z |
2003 | 77.00 | l | 72.11 | j | 80.37 | l | 83.30 | t | 96.11 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | 86.78 | h | 89.16 | k | 97.00 | m | 102.23 | q | 106.48 | j | 106.32 | l | 98.67 | u | 87.00 | p | 74.93 | p | 68.15 | k | ----- | z |
2005 | 69.71 | n | 70.00 | f | 78.50 | i | 86.10 | j | 96.42 | l | 105.46 | q | 110.67 | m | 105.53 | l | 101.62 | n | 96.29 | x | 81.54 | q | 75.50 | w | ----- | z |
2006 | 72.00 | u | 75.64 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 67.92 | 73.11 | 78.70 | 85.88 | 93.54 | 101.78 | 106.11 | 104.96 | 100.75 | 90.25 | 77.37 | 68.52 | 87.35 | |||||||||||||
S.D. | 3.43 | 3.63 | 3.59 | 3.33 | 2.99 | 2.59 | 1.65 | 1.84 | 2.65 | 3.08 | 3.13 | 2.97 | 1.03 | |||||||||||||
SKEW | -0.83 | 0.22 | 0.40 | -0.25 | -0.21 | -0.21 | -0.54 | 0.15 | -0.66 | -0.08 | 0.03 | 0.02 | 0.36 | |||||||||||||
MAX | 73.84 | 81.93 | 89.77 | 92.90 | 100.06 | 107.60 | 109.58 | 109.19 | 106.12 | 99.23 | 84.63 | 76.58 | 90.34 | |||||||||||||
MIN | 56.52 | 64.61 | 71.68 | 77.13 | 86.74 | 95.13 | 101.81 | 101.55 | 92.80 | 83.32 | 71.00 | 62.39 | 85.50 | |||||||||||||
YRS | 77 | 76 | 75 | 75 | 74 | 78 | 76 | 77 | 79 | 78 | 77 | 75 | 62 |