| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1908 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 99.00 | 100.00 | 88.00 | 70.00 | 45.00 | 100.00 | ||||||
| 1909 | 56.00 | 63.00 | b | 66.00 | a | 84.00 | 91.00 | b | 99.00 | 98.00 | a | 99.00 | b | 91.00 | a | 89.00 | 81.00 | 44.00 | a | 99.00 | ||||||
| 1910 | 61.00 | 73.00 | b | 88.00 | 98.00 | 90.00 | b | 100.00 | 103.00 | 98.00 | 98.00 | 95.00 | 80.00 | c | 57.00 | 103.00 | ||||||||||
| 1911 | 68.00 | 67.00 | b | 83.00 | 80.00 | f | 94.00 | 101.00 | 98.00 | 99.00 | e | 94.00 | 85.00 | c | 67.00 | 63.00 | a | 101.00 | ||||||||
| 1912 | 52.00 | a | 58.00 | 54.00 | b | 80.00 | 83.00 | d | 95.00 | a | 97.00 | b | 99.00 | 93.00 | a | 84.00 | 70.00 | f | 60.00 | 99.00 | ||||||
| 1913 | 60.00 | 60.00 | 75.00 | 85.00 | 93.00 | 98.00 | 105.00 | 101.00 | 95.00 | ----- | z | ----- | z | 50.00 | 105.00 | |||||||||||
| 1914 | 63.00 | 72.00 | a | 72.00 | 82.00 | b | 87.00 | 90.00 | 92.00 | 102.00 | 92.00 | 84.00 | 79.00 | 55.00 | 102.00 | |||||||||||
| 1915 | 55.00 | 68.00 | ----- | z | 90.00 | 93.00 | 89.00 | 97.00 | 99.00 | 96.00 | 90.00 | 93.00 | 45.00 | 99.00 | ||||||||||||
| 1916 | 62.00 | 68.00 | 84.00 | 88.00 | 90.00 | 99.00 | 99.00 | 98.00 | 89.00 | 82.00 | 62.00 | 45.00 | 99.00 | |||||||||||||
| 1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 100.00 | 104.00 | 99.00 | 95.00 | 83.00 | 77.00 | 61.00 | 104.00 | ||||||||
| 1918 | 65.00 | 74.00 | 80.00 | 76.00 | 91.00 | 104.00 | 110.00 | 101.00 | 89.00 | 87.00 | 75.00 | 65.00 | 110.00 | |||||||||||||
| 1919 | 59.00 | 58.00 | 74.00 | 86.00 | 89.00 | 101.00 | 105.00 | 98.00 | 92.00 | d | 80.00 | 68.00 | 60.00 | 105.00 | ||||||||||||
| 1920 | 64.00 | 65.00 | 76.00 | 70.00 | 87.00 | 100.00 | 98.00 | 92.00 | 97.00 | 91.00 | 77.00 | 68.00 | 100.00 | |||||||||||||
| 1921 | 58.00 | 71.00 | 73.00 | 85.00 | d | 88.00 | 98.00 | 101.00 | 100.00 | c | 94.00 | 90.00 | 76.00 | a | 68.00 | a | 101.00 | |||||||||
| 1922 | 65.00 | a | 63.00 | 75.00 | 82.00 | 85.00 | 100.00 | 103.00 | 104.00 | 100.00 | 94.00 | l | 61.00 | 64.00 | 104.00 | |||||||||||
| 1923 | 59.00 | 63.00 | a | 75.00 | 86.00 | ----- | z | ----- | z | 98.00 | c | 95.00 | c | 94.00 | i | 84.00 | d | 72.00 | e | 61.00 | a | 98.00 | ||||
| 1924 | 55.00 | e | 70.00 | b | 65.00 | d | 86.00 | d | 92.00 | c | 99.00 | d | 100.00 | d | 100.00 | t | 96.00 | j | 85.00 | a | 70.00 | c | 70.00 | c | 100.00 | |
| 1925 | 51.00 | i | 69.00 | e | 76.00 | g | 84.00 | f | 98.00 | b | 94.00 | d | 104.00 | b | 98.00 | i | 97.00 | i | 80.00 | 69.00 | d | 62.00 | d | 104.00 | ||
| 1926 | 69.00 | m | 66.00 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 69.00 | |
| 1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 100.00 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 100.00 | |
| 1928 | ----- | z | 63.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 96.00 | d | 89.00 | 69.00 | 51.00 | e | 96.00 | ||||
| 1929 | 55.00 | 55.00 | 77.00 | a | 80.00 | 91.00 | c | 105.00 | b | 102.00 | ----- | z | 100.00 | 80.00 | r | 55.00 | 62.00 | a | 105.00 | |||||||
| 1930 | 49.00 | a | 68.00 | 71.00 | 89.00 | 88.00 | 100.00 | 105.00 | 99.00 | 92.00 | 86.00 | 71.00 | 56.00 | 105.00 | ||||||||||||
| 1931 | 68.00 | 66.00 | 75.00 | 85.00 | j | 94.00 | d | 102.00 | b | 107.00 | 100.00 | 104.00 | a | 87.00 | 80.00 | a | 59.00 | 107.00 | ||||||||
| 1932 | 56.00 | 76.00 | a | 76.00 | c | 88.00 | 93.00 | 91.00 | 102.00 | 105.00 | a | 97.00 | 89.00 | 72.00 | 66.00 | a | 105.00 | |||||||||
| 1933 | 54.00 | 61.00 | 78.00 | a | 81.00 | c | 89.00 | 100.00 | l | 103.00 | l | 99.00 | f | 98.00 | 86.00 | 78.00 | 69.00 | h | 103.00 | |||||||
| 1934 | 65.00 | 71.00 | 76.00 | d | 87.00 | a | 98.00 | c | 98.00 | i | 105.00 | 112.00 | f | 96.00 | 94.00 | h | 81.00 | d | 64.00 | 112.00 | ||||||
| 1935 | 68.00 | 69.00 | l | 80.00 | r | ----- | z | 85.00 | k | 98.00 | 106.00 | e | 105.00 | 97.00 | c | 86.00 | 68.00 | e | 74.00 | 106.00 | ||||||
| 1936 | 54.00 | 72.00 | 76.00 | c | 85.00 | 91.00 | 102.00 | 108.00 | 106.00 | 96.00 | a | 86.00 | 71.00 | d | 56.00 | c | 108.00 | |||||||||
| 1937 | 41.00 | 65.00 | 71.00 | 83.00 | 91.00 | 103.00 | 107.00 | 108.00 | a | 100.00 | 87.00 | 72.00 | 63.00 | a | 108.00 | |||||||||||
| 1938 | 60.00 | 72.00 | 78.00 | 88.00 | 93.00 | 101.00 | 104.00 | a | 112.00 | 95.00 | 93.00 | 67.00 | 66.00 | 112.00 | ||||||||||||
| 1939 | 56.00 | 70.00 | 80.00 | 90.00 | 93.00 | 102.00 | 113.00 | 103.00 | 104.00 | 86.00 | 72.00 | 78.00 | 113.00 | |||||||||||||
| 1940 | 49.00 | 70.00 | 80.00 | 86.00 | 100.00 | 104.00 | 113.00 | 105.00 | 102.00 | 89.00 | 75.00 | 68.00 | 113.00 | |||||||||||||
| 1941 | 65.00 | 66.00 | 75.00 | 80.00 | 98.00 | 98.00 | 104.00 | 104.00 | 98.00 | 84.00 | 82.00 | 68.00 | 104.00 | |||||||||||||
| 1942 | 63.00 | 56.00 | 66.00 | 86.00 | 93.00 | 85.00 | 102.00 | 97.00 | 92.00 | 91.00 | 71.00 | 65.00 | a | 102.00 | ||||||||||||
| 1943 | 68.00 | 71.00 | 84.00 | 83.00 | 94.00 | 100.00 | 102.00 | 101.00 | 94.00 | 85.00 | 68.00 | 58.00 | 102.00 | |||||||||||||
| 1944 | 63.00 | 55.00 | 64.00 | 70.00 | 92.00 | 98.00 | 99.00 | 101.00 | 95.00 | 85.00 | 72.00 | 50.00 | 101.00 | |||||||||||||
| 1945 | 58.00 | 66.00 | 79.00 | 84.00 | 84.00 | o | 89.00 | 102.00 | 102.00 | 98.00 | 84.00 | 80.00 | 60.00 | 102.00 | ||||||||||||
| 1946 | 58.00 | ----- | z | ----- | z | ----- | z | ----- | z | 102.00 | 105.00 | 103.00 | 100.00 | 84.00 | 65.00 | 65.00 | a | 105.00 | ||||||||
| 1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 89.00 | t | 90.00 | a | 65.00 | 62.00 | 90.00 | |||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 104.00 | 100.00 | 84.00 | 74.00 | 60.00 | 104.00 | ||||||
| 1949 | 46.00 | d | 65.00 | 71.00 | 92.00 | 96.00 | 97.00 | 100.00 | 98.00 | 93.00 | 85.00 | b | 75.00 | 64.00 | 100.00 | |||||||||||
| 1950 | 70.00 | 73.00 | 74.00 | 88.00 | 93.00 | 100.00 | 98.00 | 95.00 | 95.00 | 89.00 | b | 73.00 | 64.00 | c | 100.00 | |||||||||||
| 1951 | 70.00 | 73.00 | 79.00 | 82.00 | a | 90.00 | 91.00 | 100.00 | 100.00 | b | 91.00 | i | 81.00 | k | 69.00 | 64.00 | 100.00 | |||||||||
| 1952 | 62.00 | 67.00 | 71.00 | 86.00 | 90.00 | 106.00 | 107.00 | 104.00 | 100.00 | 85.00 | 76.00 | 45.00 | 107.00 | |||||||||||||
| 1953 | 68.00 | 67.00 | 76.00 | 88.00 | 94.00 | 107.00 | 106.00 | j | 102.00 | 97.00 | 95.00 | 76.00 | 60.00 | 107.00 | ||||||||||||
| 1954 | 67.00 | 78.00 | 73.00 | 88.00 | 94.00 | 109.00 | 114.00 | 106.00 | 97.00 | 91.00 | 78.00 | 65.00 | 114.00 | |||||||||||||
| 1955 | 58.00 | 60.00 | 76.00 | 89.00 | 89.00 | 97.00 | 105.00 | 103.00 | 100.00 | 90.00 | 79.00 | 69.00 | 105.00 | |||||||||||||
| 1956 | 62.00 | 63.00 | 83.00 | 81.00 | 93.00 | a | 105.00 | 105.00 | 98.00 | a | 99.00 | 91.00 | a | 74.00 | 65.00 | 105.00 | ||||||||||
| 1957 | 55.00 | 71.00 | 70.00 | 76.00 | 87.00 | 95.00 | 101.00 | 100.00 | 94.00 | 87.00 | 71.00 | 72.00 | 101.00 | |||||||||||||
| 1958 | 61.00 | 73.00 | 61.00 | 85.00 | 92.00 | 102.00 | 96.00 | 105.00 | 98.00 | ----- | z | ----- | z | ----- | z | 105.00 | ||||||||||
| 1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 59.79 | 66.86 | 74.50 | 84.44 | 91.68 | 98.98 | 102.88 | 101.17 | 96.41 | 87.00 | 72.96 | 60.89 | 105.40 | |||||||||||||
| S.D. | 6.59 | 5.71 | 6.63 | 5.40 | 3.57 | 5.10 | 4.69 | 3.76 | 3.56 | 3.51 | 6.50 | 7.91 | 4.81 | |||||||||||||
| SKEW | -0.61 | -0.38 | -0.75 | -0.65 | 0.03 | -0.72 | 0.34 | 0.28 | -0.01 | 0.29 | 0.08 | -0.57 | 0.51 | |||||||||||||
| MAX | 70.00 | 78.00 | 88.00 | 98.00 | 100.00 | 109.00 | 114.00 | 112.00 | 104.00 | 95.00 | 93.00 | 78.00 | 114.00 | |||||||||||||
| MIN | 41.00 | 55.00 | 54.00 | 70.00 | 83.00 | 85.00 | 92.00 | 92.00 | 89.00 | 80.00 | 55.00 | 44.00 | 99.00 | |||||||||||||
| NO YRS | 43 | 43 | 40 | 39 | 40 | 43 | 43 | 42 | 44 | 43 | 46 | 47 | 20 | |||||||||||||