YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.57 | 59.21 | c | 67.89 | j | |
1913 | 61.58 | 66.07 | 72.61 | 85.21 | a | 93.35 | 99.90 | 102.74 | 104.87 | 98.21 | a | 88.32 | 74.73 | 63.68 | 84.27 | |||||||||||
1914 | 70.00 | a | 68.57 | 79.50 | a | 84.33 | 92.74 | 104.06 | n | 102.57 | a | 103.61 | 99.40 | 84.97 | ----- | z | ----- | z | 87.30 | c | ||||||
1915 | 61.13 | 65.07 | 71.65 | 80.70 | 85.80 | a | 101.30 | 102.74 | 104.61 | 96.63 | 92.37 | a | 75.57 | 64.81 | 83.53 | |||||||||||
1916 | 60.47 | a | 72.76 | 78.77 | 85.03 | a | 93.43 | a | 103.97 | a | 104.06 | 101.37 | a | 95.59 | a | 83.48 | 73.93 | 62.50 | a | 84.61 | ||||||
1917 | 61.48 | 68.14 | 72.78 | d | 80.48 | c | 82.52 | 103.48 | a | 103.93 | a | 102.00 | 97.67 | 91.58 | 79.66 | a | 72.90 | 84.72 | ||||||||
1918 | 63.97 | a | 69.46 | 75.23 | 83.90 | a | 89.31 | b | 105.77 | 102.65 | 98.97 | 98.50 | d | 91.45 | 73.13 | 63.32 | c | 84.64 | ||||||||
1919 | 66.87 | 63.70 | a | 71.82 | c | 86.14 | a | 92.32 | f | 104.03 | 98.50 | a | 101.80 | a | 95.00 | 82.35 | 72.27 | 69.77 | a | 82.93 | a | |||||
1920 | 65.29 | 69.62 | 73.83 | b | 79.82 | b | 93.87 | a | 101.67 | 106.94 | 100.74 | 96.50 | 83.13 | 75.23 | 65.48 | 84.34 | ||||||||||
1921 | 66.30 | h | 74.11 | a | 80.29 | 83.43 | 90.80 | f | 101.43 | 98.86 | c | 100.84 | 101.17 | 90.71 | 81.30 | 68.97 | 88.11 | b | ||||||||
1922 | 63.32 | 68.71 | 71.84 | 79.23 | 95.90 | 105.41 | a | 105.10 | 103.61 | 100.73 | 89.97 | 72.23 | 68.61 | c | 85.39 | |||||||||||
1923 | 71.13 | 69.71 | 74.06 | 79.43 | 95.00 | h | 100.00 | 103.88 | e | 100.03 | 96.33 | 86.32 | 71.93 | 61.84 | 83.15 | a | ||||||||||
1924 | 66.03 | 75.96 | e | 70.31 | e | 81.13 | 96.55 | 105.87 | 104.77 | 104.97 | 100.40 | 87.13 | 79.07 | 64.03 | 86.35 | |||||||||||
1925 | 67.10 | b | 75.82 | 80.48 | 86.80 | 96.00 | 99.83 | 107.61 | 102.20 | f | 98.44 | c | 82.79 | b | 74.37 | 67.65 | 85.17 | a | ||||||||
1926 | 64.16 | 74.07 | 78.71 | 82.07 | 92.52 | 105.37 | 105.03 | 104.39 | 98.80 | 91.06 | 77.70 | 63.61 | 86.46 | |||||||||||||
1927 | 71.32 | 70.07 | 75.17 | a | 84.00 | 95.48 | 101.14 | a | 105.77 | a | 101.52 | f | 96.75 | f | 88.70 | d | 79.37 | c | 63.54 | e | 83.46 | b | ||||
1928 | 69.50 | e | 69.32 | a | 81.27 | p | 85.04 | d | 95.32 | 103.87 | 107.22 | h | 102.38 | e | 102.12 | d | 86.38 | e | 74.70 | 66.41 | b | 85.50 | b | |||
1929 | 64.29 | 65.63 | a | 74.90 | b | 81.00 | e | 93.65 | 104.37 | 103.46 | e | 102.70 | k | 98.58 | k | 90.79 | b | 75.13 | 74.24 | f | 83.69 | c | ||||
1930 | 63.46 | e | 76.05 | i | 75.64 | f | 87.59 | a | 85.41 | d | 101.96 | b | 103.00 | f | 103.32 | 99.27 | 88.00 | a | 74.67 | 66.55 | 85.58 | c | ||||
1931 | 68.07 | a | 68.38 | b | 78.21 | c | 86.57 | b | 97.85 | d | 103.00 | 108.35 | 100.84 | 98.60 | 87.45 | 68.80 | 62.19 | 85.69 | ||||||||
1932 | 54.55 | 66.70 | b | 74.90 | 85.25 | b | 94.32 | 101.73 | 106.08 | f | 104.41 | d | 101.40 | 85.39 | 80.57 | i | 60.17 | a | 82.88 | b | ||||||
1933 | 62.45 | b | 62.93 | 76.93 | b | 79.93 | c | 88.21 | c | 103.46 | b | 108.29 | 105.71 | 100.00 | a | 91.81 | e | 84.79 | f | 70.30 | a | 86.37 | a | |||
1934 | 69.83 | g | 75.93 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.93 | k | |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | 62.50 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | 61.62 | g | ----- | z | 70.13 | 79.45 | a | 91.19 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 80.26 | i | ||
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 88.23 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.96 | f | 88.23 | k | |
1973 | 62.23 | 67.21 | 67.58 | 82.40 | 95.35 | 103.03 | 105.67 | a | 104.29 | 99.23 | 90.74 | 74.53 | 68.52 | 85.07 | ||||||||||||
1974 | 64.55 | 69.71 | 75.90 | 84.13 | 93.48 | 105.60 | 101.84 | 102.48 | 97.10 | 86.26 | 73.47 | 61.71 | 84.69 | |||||||||||||
1975 | 64.71 | 66.86 | 72.23 | 76.32 | b | 89.61 | 99.77 | 103.00 | 103.65 | 97.57 | 87.23 | 77.30 | 67.84 | 83.84 | ||||||||||||
1976 | 64.91 | h | 66.59 | 74.06 | 82.13 | 93.81 | 101.67 | 102.55 | 102.94 | 94.21 | a | 83.47 | a | 76.53 | 68.24 | b | 86.02 | a | ||||||||
1977 | 63.87 | 74.71 | 72.13 | 85.10 | 87.23 | 104.00 | 104.48 | 103.42 | 96.83 | 89.48 | 78.00 | a | 70.93 | b | 85.85 | |||||||||||
1978 | 63.65 | 67.46 | 75.37 | a | 82.57 | i | 91.61 | 104.80 | 105.69 | b | 102.06 | 97.17 | 91.67 | a | 71.43 | 60.45 | 84.67 | a | ||||||||
1979 | 57.90 | a | 69.93 | a | 72.93 | a | 85.72 | a | 89.84 | 102.57 | 105.77 | 101.62 | g | 102.67 | r | 87.33 | j | 73.86 | a | 71.57 | a | 81.12 | c | |||
1980 | 67.47 | a | 71.93 | a | 69.03 | a | 82.93 | b | 88.59 | b | 103.93 | 107.29 | 104.50 | c | 100.10 | 90.58 | 77.19 | d | ----- | z | 87.59 | a | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 64.46 | 69.49 | 74.33 | 83.12 | 91.96 | 102.96 | 104.29 | 102.87 | 98.34 | 87.99 | 75.28 | 65.73 | 84.96 | |||||||||||||
S.D. | 3.84 | 3.63 | 3.39 | 2.91 | 3.83 | 1.91 | 2.49 | 1.74 | 2.03 | 3.14 | 2.85 | 3.77 | 0.89 | |||||||||||||
SKEW | -0.28 | 0.33 | 0.15 | -0.27 | -0.70 | -0.17 | -0.45 | -0.44 | -0.08 | -0.34 | 0.05 | 0.10 | 0.25 | |||||||||||||
MAX | 71.32 | 75.96 | 80.48 | 88.23 | 97.85 | 105.87 | 108.35 | 105.71 | 102.12 | 92.37 | 81.30 | 72.90 | 86.46 | |||||||||||||
MIN | 54.55 | 62.93 | 67.58 | 76.32 | 82.52 | 99.77 | 98.50 | 98.97 | 94.21 | 82.35 | 68.80 | 59.21 | 83.53 | |||||||||||||
YRS | 27 | 29 | 28 | 30 | 27 | 28 | 26 | 25 | 26 | 28 | 27 | 27 | 14 |