YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1905 | 76.06 | 79.18 | 80.42 | 82.30 | 83.71 | 85.27 | 86.84 | 87.29 | 86.03 | 84.81 | 83.13 | 80.32 | 82.95 | |||||||||||||
1906 | 78.81 | 79.93 | 78.10 | 83.57 | 84.19 | 87.23 | 88.03 | 88.65 | 88.47 | 87.35 | 83.40 | 78.90 | 83.89 | |||||||||||||
1907 | 78.19 | 79.11 | 77.97 | 80.50 | 84.00 | 87.03 | 87.77 | 87.52 | 87.90 | 85.71 | 83.30 | 82.16 | 83.43 | |||||||||||||
1908 | 80.16 | 80.21 | 79.29 | 80.77 | 83.77 | 84.93 | 86.29 | 87.29 | 86.33 | 85.03 | 83.30 | 80.32 | 83.14 | |||||||||||||
1909 | 78.26 | 77.82 | 77.03 | 80.30 | 83.90 | 85.90 | 86.27 | a | 86.94 | 86.57 | 85.03 | 84.14 | b | 80.61 | 82.73 | |||||||||||
1910 | 77.35 | 79.36 | 81.13 | 80.87 | 83.10 | 84.47 | 86.29 | 86.65 | 85.40 | 84.61 | 82.30 | 80.19 | 82.64 | |||||||||||||
1911 | 76.74 | 77.14 | 78.71 | 81.73 | 83.71 | 85.00 | 86.35 | 87.77 | 86.10 | 84.71 | 83.23 | 81.32 | 82.71 | |||||||||||||
1912 | 80.26 | 79.62 | 78.61 | 82.20 | 84.42 | 85.53 | 87.35 | 88.00 | 87.53 | 86.65 | 82.87 | 82.42 | 83.79 | |||||||||||||
1913 | 81.13 | 79.71 | 81.90 | 83.10 | 83.35 | 84.53 | 87.87 | 87.87 | 87.53 | 86.77 | 83.70 | 81.65 | 84.09 | |||||||||||||
1914 | 77.42 | 80.54 | 79.39 | 81.27 | 83.23 | 86.07 | 88.03 | 88.42 | 86.40 | 86.06 | 83.33 | 79.70 | a | 83.32 | ||||||||||||
1915 | 78.84 | 78.21 | 80.84 | 81.93 | 85.55 | 88.17 | 88.00 | 89.29 | 88.60 | 86.71 | 81.53 | 79.45 | 83.93 | |||||||||||||
1916 | 76.97 | 79.55 | 79.74 | 83.23 | 84.58 | 85.53 | 86.84 | 86.68 | 86.47 | 85.00 | 83.47 | 80.00 | 83.17 | |||||||||||||
1917 | 78.40 | a | 77.89 | 78.39 | 81.50 | 84.48 | 86.37 | 88.19 | 88.35 | 87.90 | 85.90 | 83.73 | 81.13 | 83.52 | ||||||||||||
1918 | 78.90 | 78.21 | 78.39 | 77.67 | 83.43 | a | 86.47 | 88.45 | 88.87 | 88.60 | 87.81 | 84.63 | 80.23 | 83.47 | ||||||||||||
1919 | 79.00 | 81.36 | 81.68 | 83.43 | 85.23 | 86.80 | 88.19 | 89.29 | 87.37 | 86.39 | 84.97 | 82.32 | 84.67 | |||||||||||||
1920 | 80.00 | 82.34 | 82.26 | 82.90 | 84.94 | 85.30 | 86.23 | 87.10 | 86.97 | 85.23 | 82.17 | 80.13 | 83.80 | |||||||||||||
1921 | 75.77 | 79.07 | 81.97 | 84.17 | 86.10 | 87.13 | 87.03 | 87.13 | 86.73 | 84.48 | 83.43 | 80.87 | 83.66 | |||||||||||||
1922 | 78.94 | 79.36 | 82.13 | 84.00 | 84.77 | 86.80 | 88.45 | 88.19 | 86.67 | 85.97 | 83.07 | 82.97 | 84.28 | |||||||||||||
1923 | 77.94 | 77.07 | 78.48 | 80.77 | 83.00 | 85.70 | 86.68 | 88.03 | 88.43 | 87.29 | 83.83 | 79.10 | 83.03 | |||||||||||||
1924 | 78.77 | 80.00 | 80.13 | 80.20 | 84.06 | 86.03 | 86.29 | 86.65 | 86.90 | 83.27 | a | 81.00 | 80.30 | a | 82.80 | |||||||||||
1925 | 80.00 | 81.50 | 80.32 | 80.13 | 83.03 | 84.50 | 86.81 | 87.42 | 86.63 | 85.71 | 80.93 | 81.00 | 83.17 | |||||||||||||
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 | 84.97 | a | 82.14 | a | 80.45 | 82.52 | i | |
1950 | 78.76 | f | 80.36 | 81.39 | 81.24 | a | 82.67 | a | 84.00 | 86.10 | 86.55 | 86.90 | 86.87 | a | 84.43 | 79.71 | 83.66 | a | ||||||||
1951 | 81.16 | 79.61 | 79.94 | 82.27 | 84.13 | 85.10 | 87.13 | 87.65 | 87.63 | 86.71 | 84.24 | a | 81.35 | 83.91 | ||||||||||||
1952 | 80.10 | 81.38 | 81.32 | 82.23 | 82.35 | e | 84.80 | 86.35 | 87.29 | 86.13 | 85.55 | 84.79 | a | 81.97 | 83.69 | |||||||||||
1953 | 80.71 | 82.21 | 81.77 | 83.57 | 84.58 | 85.27 | 86.77 | 86.90 | 86.24 | a | 86.30 | a | 83.93 | 80.81 | 84.09 | |||||||||||
1954 | 79.65 | 80.82 | 79.65 | 82.90 | 83.26 | 86.60 | 86.35 | 88.19 | 87.57 | 88.23 | 86.00 | 82.32 | 84.29 | |||||||||||||
1955 | 81.13 | 78.96 | 78.13 | 81.23 | 81.61 | 82.30 | 84.29 | 84.94 | 85.23 | 84.00 | 83.17 | 80.97 | 82.16 | |||||||||||||
1956 | 79.68 | 78.59 | 81.94 | 82.67 | 84.35 | 85.07 | 85.97 | 87.55 | 87.43 | 85.97 | 83.63 | 80.97 | 83.65 | |||||||||||||
1957 | 80.10 | 78.14 | 79.90 | 81.93 | 84.30 | a | 86.57 | 87.97 | 87.58 | 87.47 | 87.35 | 85.10 | 80.06 | 83.87 | ||||||||||||
1958 | 79.81 | 80.79 | 79.26 | 82.14 | a | 83.42 | 86.13 | 86.87 | 88.16 | 88.37 | 85.55 | 83.73 | 81.16 | 83.78 | ||||||||||||
1959 | 80.40 | a | 79.64 | 83.61 | 82.83 | 84.74 | 86.80 | 87.90 | 87.61 | 88.23 | 87.35 | 83.37 | 81.97 | 84.54 | ||||||||||||
1960 | 81.00 | 80.48 | 81.10 | 83.17 | 85.00 | a | 86.44 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 82.15 | g | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 79.09 | 79.63 | 80.15 | 81.96 | 83.97 | 85.72 | 87.03 | 87.61 | 87.12 | 85.92 | 83.44 | 80.84 | 83.54 | |||||||||||||
S.D. | 1.50 | 1.35 | 1.60 | 1.39 | 0.95 | 1.17 | 0.95 | 0.89 | 0.93 | 1.17 | 1.12 | 1.02 | 0.60 | |||||||||||||
SKEW | -0.53 | 0.07 | 0.06 | -0.80 | -0.15 | -0.51 | -0.46 | -0.45 | -0.06 | -0.08 | -0.28 | 0.18 | -0.24 | |||||||||||||
MAX | 81.16 | 82.34 | 83.61 | 84.17 | 86.10 | 88.17 | 88.45 | 89.29 | 88.60 | 88.23 | 86.00 | 82.97 | 84.67 | |||||||||||||
MIN | 75.77 | 77.07 | 77.03 | 77.67 | 81.61 | 82.30 | 84.29 | 84.94 | 85.23 | 83.27 | 80.93 | 78.90 | 82.16 | |||||||||||||
YRS | 31 | 32 | 32 | 32 | 32 | 31 | 31 | 31 | 31 | 32 | 32 | 32 | 30 |