YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1905 | 66.39 | 68.68 | 70.65 | 73.35 | 75.03 | 76.55 | 78.48 | 79.29 | 78.08 | 76.60 | 75.08 | 72.08 | 74.19 | |||||||||||||
1906 | 70.68 | 70.86 | 69.37 | 74.40 | 75.84 | 78.67 | 79.27 | 80.06 | 79.45 | 78.60 | 75.00 | 72.29 | 75.37 | |||||||||||||
1907 | 71.71 | 71.04 | 70.60 | 71.52 | 74.89 | 78.05 | 78.73 | 79.56 | 79.33 | 76.90 | 75.15 | 73.27 | 75.06 | |||||||||||||
1908 | 70.89 | 71.41 | 71.95 | 72.52 | 75.24 | 76.13 | 77.53 | 78.40 | 77.58 | 76.35 | 73.83 | 72.52 | 74.53 | |||||||||||||
1909 | 69.94 | 69.64 | 70.03 | 71.82 | 74.89 | 77.12 | 77.82 | a | 77.73 | a | 77.27 | 76.24 | 75.22 | e | 72.74 | 74.20 | ||||||||||
1910 | 70.05 | 69.82 | 72.39 | 72.85 | 74.71 | 76.40 | 77.61 | 78.19 | 77.52 | 76.19 | 74.58 | 71.29 | 74.30 | |||||||||||||
1911 | 69.92 | 69.54 | 70.84 | 73.63 | 75.05 | 76.77 | 78.08 | 79.39 | 78.38 | 75.77 | 74.58 | 72.98 | 74.58 | |||||||||||||
1912 | 71.37 | 71.14 | 70.27 | 73.92 | 75.47 | 76.87 | 78.76 | 79.32 | 79.00 | 78.31 | 74.53 | 74.55 | 75.29 | |||||||||||||
1913 | 71.94 | 70.38 | 72.60 | 74.50 | 75.03 | 76.57 | 78.92 | 79.56 | 78.62 | 77.89 | 76.40 | 72.52 | 75.41 | |||||||||||||
1914 | 69.58 | 70.70 | 70.87 | 73.42 | 75.18 | 78.12 | 79.95 | 80.74 | 79.45 | 77.53 | 75.15 | 71.04 | f | 75.52 | a | |||||||||||
1915 | 70.26 | 70.11 | 71.29 | 73.25 | 76.95 | 78.97 | 79.37 | 80.55 | 79.48 | 78.11 | 74.85 | 72.61 | 75.48 | |||||||||||||
1916 | 70.42 | 71.38 | 71.92 | 74.38 | 76.02 | 77.10 | 78.03 | 77.68 | 77.77 | 76.84 | 75.18 | 72.61 | 74.94 | |||||||||||||
1917 | 69.93 | a | 69.34 | 71.06 | 73.08 | 75.31 | 77.33 | 78.48 | 78.87 | 78.50 | 76.55 | 75.18 | 73.08 | 74.73 | ||||||||||||
1918 | 70.85 | 70.46 | 70.76 | 71.42 | 74.57 | a | 77.38 | 79.92 | 79.90 | 79.25 | 78.87 | 76.00 | 72.58 | 75.16 | ||||||||||||
1919 | 69.61 | 71.93 | 72.19 | 74.33 | 75.85 | 77.58 | 79.08 | 80.37 | 78.07 | 77.55 | 75.70 | 73.16 | 75.45 | |||||||||||||
1920 | 70.98 | 72.21 | 72.63 | 74.08 | 75.85 | 77.37 | 78.48 | 79.08 | 79.10 | 77.21 | 73.46 | c | 72.72 | a | 75.26 | |||||||||||
1921 | 70.58 | 70.54 | 71.98 | 74.33 | 75.68 | 77.95 | 78.31 | 77.90 | 77.67 | 75.58 | 74.38 | 72.94 | 74.82 | |||||||||||||
1922 | 70.85 | 71.04 | 72.50 | 74.37 | 75.26 | 77.13 | 78.73 | 79.05 | 78.18 | 76.82 | 74.52 | 72.35 | 75.07 | |||||||||||||
1923 | 71.50 | 68.39 | 70.58 | 73.03 | 74.44 | 76.43 | 78.05 | 78.58 | 79.00 | 77.84 | 74.83 | 72.37 | 74.59 | |||||||||||||
1924 | 68.84 | 70.90 | 71.03 | 72.40 | 74.98 | 76.68 | 77.65 | 77.95 | 77.70 | 75.72 | a | 73.17 | 72.14 | b | 74.10 | |||||||||||
1925 | 71.73 | 71.46 | 71.84 | 72.63 | 74.84 | 76.72 | 78.02 | 79.00 | 78.18 | 76.81 | 74.02 | 73.00 | 74.85 | |||||||||||||
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 74.68 | a | 72.22 | a | 71.48 | 72.80 | i | |
1950 | 70.62 | f | 71.77 | 71.48 | 72.86 | a | 74.22 | a | 74.70 | 76.52 | 77.47 | 76.75 | 76.88 | a | 74.74 | a | 70.83 | a | 74.38 | a | ||||||
1951 | 71.10 | 70.30 | 71.85 | 72.33 | 74.06 | 74.98 | 78.44 | 78.42 | 77.73 | 77.29 | 75.10 | a | 72.93 | a | 74.55 | |||||||||||
1952 | 71.02 | 70.86 | 72.47 | 72.65 | 72.42 | e | 76.82 | 77.06 | 78.13 | 76.63 | 76.37 | 75.76 | a | 71.97 | 74.35 | |||||||||||
1953 | 70.52 | 71.70 | 72.02 | 73.57 | 75.90 | 77.52 | 77.85 | 77.98 | 76.36 | a | 75.67 | a | 74.18 | 71.64 | b | 74.58 | ||||||||||
1954 | 69.73 | 71.73 | 70.10 | 73.40 | 74.68 | 77.55 | 77.69 | 79.55 | 78.07 | 77.42 | 75.53 | 72.53 | 74.83 | |||||||||||||
1955 | 70.71 | 70.95 | 69.29 | 72.97 | 73.85 | 74.40 | 75.89 | 76.21 | 76.03 | 74.97 | 74.68 | 72.44 | 73.53 | |||||||||||||
1956 | 71.63 | 70.84 | 72.68 | 73.68 | 75.90 | 76.78 | 77.26 | 78.65 | 77.90 | 77.32 | 75.02 | 71.95 | 74.97 | |||||||||||||
1957 | 71.81 | 69.55 | 69.39 | 73.25 | 74.30 | a | 76.62 | 79.15 | 79.45 | 77.97 | 77.87 | 76.53 | 73.56 | 74.95 | ||||||||||||
1958 | 69.71 | 70.70 | 69.45 | 72.69 | a | 74.98 | 77.12 | 78.34 | 79.81 | 79.32 | 77.29 | 74.00 | 71.35 | 74.56 | ||||||||||||
1959 | 70.88 | a | 70.70 | 74.15 | 73.93 | 76.16 | 77.38 | 78.87 | 79.37 | 79.62 | 76.77 | 74.80 | 73.10 | 75.48 | ||||||||||||
1960 | 71.48 | 70.95 | 72.50 | 74.52 | 76.47 | a | 77.14 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.18 | g | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 70.54 | 70.66 | 71.34 | 73.28 | 75.13 | 76.96 | 78.27 | 78.91 | 78.19 | 76.90 | 74.79 | 72.50 | 74.80 | |||||||||||||
S.D. | 1.09 | 0.91 | 1.18 | 0.87 | 0.87 | 1.00 | 0.90 | 1.01 | 0.97 | 1.00 | 0.89 | 0.74 | 0.48 | |||||||||||||
SKEW | -1.74 | -0.65 | -0.01 | -0.35 | -0.63 | -0.66 | -0.43 | -0.39 | -0.36 | -0.19 | -0.58 | 0.10 | -0.48 | |||||||||||||
MAX | 71.94 | 72.21 | 74.15 | 74.52 | 76.95 | 78.97 | 79.95 | 80.74 | 79.62 | 78.87 | 76.53 | 74.55 | 75.48 | |||||||||||||
MIN | 66.39 | 68.39 | 69.29 | 71.42 | 72.42 | 74.40 | 75.89 | 76.21 | 76.03 | 74.68 | 72.22 | 70.83 | 73.53 | |||||||||||||
YRS | 31 | 32 | 32 | 32 | 32 | 31 | 31 | 31 | 31 | 32 | 32 | 31 | 29 |