| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 111.87 | g | 117.16 | 115.77 | 105.17 | 91.10 | 78.17 | 68.94 | 96.05 | |||||||
| 1912 | 72.71 | 80.55 | 81.55 | 88.67 | 100.00 | 109.53 | 110.74 | 111.42 | 100.87 | 88.35 | 79.27 | 67.68 | 90.94 | |||||||||||||
| 1913 | 64.81 | 72.71 | 81.42 | 96.20 | 103.23 | 110.03 | 116.45 | 116.68 | 107.70 | 94.84 | 78.43 | 65.68 | 92.35 | |||||||||||||
| 1914 | 70.35 | 75.11 | 86.32 | ----- | z | ----- | z | ----- | z | ----- | z | 116.19 | ----- | z | 91.52 | 81.53 | ----- | z | 86.84 | |||||||
| 1915 | 69.84 | 69.04 | 82.58 | 91.43 | ----- | z | ----- | z | ----- | z | 118.16 | ----- | z | 90.65 | 71.30 | ----- | z | 84.71 | ||||||||
| 1916 | ----- | z | 69.00 | z | ----- | z | ----- | z | 100.16 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 100.16 | ||
| 1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 121.90 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 121.90 | ||
| 1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.67 | 56.65 | 62.16 | |||
| 1919 | 57.77 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 116.19 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 86.98 | |||
| 1920 | ----- | z | 70.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1924 | ----- | z | 78.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1928 | ----- | z | 77.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1932 | ----- | z | 87.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1936 | ----- | z | 85.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.17 | 70.06 | 74.12 | |||
| 1938 | 70.26 | 70.36 | 77.29 | 90.10 | 97.71 | 107.07 | 112.67 | j | 112.71 | 106.23 | 89.10 | 71.77 | 66.68 | 87.21 | ||||||||||||
| 1939 | 66.35 | 65.46 | 80.42 | 92.23 | 99.48 | 108.23 | 115.03 | 114.35 | 100.73 | ----- | z | 77.20 | 68.58 | 89.83 | ||||||||||||
| 1940 | 67.42 | 70.96 | a | 84.45 | 89.47 | 103.68 | 113.47 | 114.71 | 115.29 | 101.97 | 92.26 | 73.70 | 64.74 | 91.01 | ||||||||||||
| 1941 | 66.16 | 70.75 | 79.45 | 82.10 | 98.84 | 104.77 | 114.06 | 107.42 | 99.53 | 84.45 | 75.37 | 64.03 | 87.24 | |||||||||||||
| 1942 | 66.35 | 68.68 | 79.16 | 88.30 | 95.10 | 108.00 | 118.03 | 113.16 | 104.37 | 92.97 | ----- | z | 71.87 | 91.45 | ||||||||||||
| 1943 | 70.65 | 78.68 | 84.16 | 93.63 | 100.39 | 103.17 | 115.52 | 112.84 | 107.03 | 93.40 | f | 77.90 | 68.19 | 92.01 | ||||||||||||
| 1944 | 67.68 | 71.55 | 81.10 | 87.37 | 99.10 | 102.50 | 113.65 | 113.97 | 107.20 | 94.10 | 75.17 | 67.68 | 90.09 | |||||||||||||
| 1945 | 66.84 | 72.64 | 77.00 | 89.33 | 95.55 | 105.93 | 116.52 | 110.29 | 107.37 | 91.52 | 77.77 | 61.90 | 89.39 | |||||||||||||
| 1946 | 66.61 | 70.93 | 82.94 | 96.53 | 99.10 | 109.33 | 113.84 | 114.00 | 107.93 | 88.94 | 73.83 | 69.61 | 91.13 | |||||||||||||
| 1947 | 67.42 | 77.86 | 87.00 | 92.57 | 105.61 | 107.04 | g | 114.45 | 110.10 | 108.57 | 91.68 | 73.77 | 64.48 | 90.32 | ||||||||||||
| 1948 | 69.23 | 70.14 | ----- | z | 91.37 | 97.90 | 107.07 | 113.52 | 113.03 | 106.73 | 93.23 | 76.63 | 65.84 | 91.33 | ||||||||||||
| 1949 | 53.90 | 66.43 | 77.77 | 94.63 | 96.58 | 109.73 | 115.32 | 111.55 | 109.41 | h | 90.74 | 83.50 | 66.77 | 87.90 | ||||||||||||
| 1950 | 62.58 | 78.18 | 83.87 | 96.00 | 99.35 | 107.37 | 114.74 | 113.84 | 102.63 | 96.26 | 81.77 | 71.42 | 92.33 | |||||||||||||
| 1951 | 66.35 | 71.96 | 80.39 | 90.90 | 100.23 | 108.30 | 116.74 | 112.97 | 108.67 | 91.45 | 76.50 | 64.81 | 90.77 | |||||||||||||
| 1952 | 62.13 | 72.38 | 72.19 | 88.73 | 94.67 | z | 104.80 | 114.94 | 115.45 | 107.60 | 98.81 | 72.37 | 65.13 | 88.59 | ||||||||||||
| 1953 | 69.23 | 73.68 | 82.84 | 90.47 | 91.39 | 106.13 | 117.35 | 112.29 | 108.27 | 91.68 | 78.33 | 66.81 | 90.70 | |||||||||||||
| 1954 | 66.61 | 80.29 | 78.42 | 95.67 | 104.26 | 106.63 | 116.48 | 109.77 | a | 105.63 | 92.77 | 79.33 | 64.32 | 91.68 | ||||||||||||
| 1955 | 61.16 | 67.14 | 81.39 | 86.37 | 95.58 | 107.53 | 111.94 | 114.35 | 107.72 | a | 94.48 | 76.67 | 68.81 | 89.43 | ||||||||||||
| 1956 | 68.45 | 69.03 | 83.17 | b | 88.44 | e | 105.27 | p | 109.97 | 112.55 | 111.06 | 108.20 | 92.23 | 79.47 | 68.94 | 90.14 | ||||||||||
| 1957 | 64.81 | 78.04 | 86.52 | d | 93.63 | 92.16 | 111.10 | 114.45 | 112.39 | ----- | z | ----- | z | ----- | z | ----- | z | 94.14 | ||||||||
| 1958 | ----- | z | ----- | z | 75.58 | 88.50 | 103.10 | a | 108.20 | 114.32 | 116.42 | 108.07 | 96.16 | 74.97 | 67.42 | 95.27 | ||||||||||
| 1959 | 68.13 | 70.32 | 85.35 | 95.80 | 97.35 | 113.10 | 119.32 | 113.10 | 101.93 | 94.35 | 77.82 | b | 66.16 | 91.90 | ||||||||||||
| 1960 | 61.26 | 70.34 | 86.26 | 94.30 | 100.68 | 114.67 | 118.13 | 114.94 | 108.67 | 92.16 | 71.47 | k | 66.13 | 93.41 | ||||||||||||
| 1961 | 65.55 | 75.14 | 82.19 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.29 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 66.09 | 72.53 | 81.51 | 91.26 | 99.02 | 108.19 | 115.48 | 113.34 | 105.78 | 92.23 | 76.61 | 66.64 | 90.69 | |||||||||||||
| S.D. | 4.07 | 4.17 | 3.62 | 3.57 | 3.56 | 3.03 | 2.33 | 2.39 | 2.91 | 2.89 | 3.49 | 3.07 | 1.41 | |||||||||||||
| SKEW | -1.14 | 0.44 | -0.55 | -0.38 | -0.26 | 0.26 | 0.50 | -0.27 | -0.87 | -0.27 | -0.42 | -1.08 | -0.91 | |||||||||||||
| MAX | 72.71 | 80.55 | 87.00 | 96.53 | 105.61 | 114.67 | 121.90 | 118.16 | 108.67 | 98.81 | 83.50 | 71.87 | 92.35 | |||||||||||||
| MIN | 53.90 | 65.46 | 72.19 | 82.10 | 91.39 | 102.50 | 110.74 | 107.42 | 99.53 | 84.45 | 67.67 | 56.65 | 87.24 | |||||||||||||
| NO YRS | 28 | 27 | 27 | 26 | 24 | 24 | 27 | 28 | 24 | 25 | 27 | 27 | 13 | |||||||||||||