| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 95.00 | a | 88.00 | 84.00 | 59.00 | 95.00 | ||||
| 1914 | 87.00 | 77.00 | 82.00 | 92.00 | 95.00 | 96.00 | 102.00 | b | 98.00 | 93.00 | 87.00 | 78.00 | 66.00 | e | 102.00 | |||||||||||
| 1915 | 67.00 | 76.00 | 81.00 | 83.00 | b | 91.00 | 100.00 | 97.00 | 93.00 | 98.00 | 85.00 | b | 84.00 | 76.00 | 100.00 | |||||||||||
| 1916 | 78.00 | 93.00 | 91.00 | a | 89.00 | 102.00 | 103.00 | 102.00 | 97.00 | 90.00 | 91.00 | 89.00 | 77.00 | 103.00 | ||||||||||||
| 1917 | 74.00 | 86.00 | 88.00 | 91.00 | 94.00 | 105.00 | 102.00 | 102.00 | 97.00 | 92.00 | 78.00 | 77.00 | 105.00 | |||||||||||||
| 1918 | 76.00 | 89.00 | ----- | z | ----- | z | 95.00 | 103.00 | 99.00 | 99.00 | 98.00 | 94.00 | 79.00 | 75.00 | 103.00 | |||||||||||
| 1919 | 66.00 | 76.00 | 79.00 | 84.00 | 90.00 | 95.00 | 94.00 | 101.00 | 97.00 | 87.00 | 77.00 | 73.00 | 101.00 | |||||||||||||
| 1920 | 74.00 | 77.00 | 80.00 | 82.00 | 84.00 | 84.00 | 99.00 | 96.00 | 91.00 | 92.00 | 76.00 | 77.00 | 99.00 | |||||||||||||
| 1921 | 77.00 | 82.00 | 88.00 | 91.00 | 97.00 | 96.00 | 98.00 | 102.00 | 99.00 | 90.00 | 81.00 | 80.00 | 102.00 | |||||||||||||
| 1922 | 72.00 | 80.00 | 83.00 | 87.00 | 93.00 | 95.00 | 100.00 | 103.00 | 99.00 | 90.00 | 86.00 | b | 75.00 | 103.00 | ||||||||||||
| 1923 | 82.00 | 70.00 | 82.00 | 87.00 | 94.00 | 102.00 | a | 101.00 | a | 100.00 | 95.00 | 84.00 | 74.00 | 74.00 | 102.00 | |||||||||||
| 1924 | 69.00 | 76.00 | 82.00 | 88.00 | 95.00 | 108.00 | 101.00 | 102.00 | 94.00 | 90.00 | 86.00 | 74.00 | 108.00 | |||||||||||||
| 1925 | 73.00 | 82.00 | 89.00 | 100.00 | 95.00 | 101.00 | 106.00 | 94.00 | 90.00 | 90.00 | 79.00 | 73.00 | 106.00 | |||||||||||||
| 1926 | 69.00 | 79.00 | 77.00 | 85.00 | 90.00 | 99.00 | 102.00 | 99.00 | 98.00 | 85.00 | 78.00 | 79.00 | 102.00 | |||||||||||||
| 1927 | 82.00 | d | 78.00 | 84.00 | 92.00 | 100.00 | 102.00 | 101.00 | 100.00 | a | 91.00 | v | 91.00 | e | 88.00 | f | ----- | z | 102.00 | |||||||
| 1928 | 76.00 | 76.00 | a | 87.00 | 92.00 | 99.00 | 103.00 | j | 99.00 | o | 91.00 | 96.00 | 91.00 | 77.00 | b | 81.00 | 103.00 | |||||||||
| 1929 | 70.00 | 71.00 | 88.00 | 86.00 | 93.00 | 103.00 | 101.00 | 100.00 | 97.00 | 94.00 | 72.00 | 76.00 | 103.00 | |||||||||||||
| 1930 | 68.00 | 80.00 | 79.00 | 93.00 | 94.00 | 106.00 | 100.00 | 103.00 | 105.00 | 90.00 | 77.00 | 62.00 | 106.00 | |||||||||||||
| 1931 | 68.00 | 71.00 | 84.00 | 84.00 | 98.00 | 105.00 | 100.00 | 100.00 | 97.00 | 94.00 | 81.00 | 67.00 | 105.00 | |||||||||||||
| 1932 | 67.00 | 81.00 | 86.00 | 91.00 | 90.00 | 101.00 | 99.00 | 102.00 | 94.00 | 87.00 | 82.00 | 74.00 | 102.00 | |||||||||||||
| 1933 | 68.00 | 77.00 | 85.00 | 86.00 | 98.00 | 102.00 | 108.00 | 100.00 | 97.00 | 91.00 | 85.00 | 81.00 | 108.00 | |||||||||||||
| 1934 | 76.00 | 80.00 | 87.00 | 93.00 | 99.00 | 106.00 | 104.00 | 101.00 | 100.00 | 97.00 | 88.00 | 73.00 | 106.00 | |||||||||||||
| 1935 | 76.00 | 77.00 | 86.00 | ----- | z | 95.00 | 108.00 | 101.00 | 103.00 | 89.00 | 92.00 | 75.00 | 62.00 | 108.00 | ||||||||||||
| 1936 | 75.00 | 80.00 | 83.00 | 92.00 | 92.00 | ----- | z | 108.00 | 107.00 | 100.00 | 89.00 | 73.00 | 67.00 | 108.00 | ||||||||||||
| 1937 | 66.00 | b | 81.00 | 77.00 | 94.00 | 98.00 | a | 99.00 | 105.00 | 103.00 | 94.00 | 92.00 | 85.00 | 70.00 | 105.00 | |||||||||||
| 1938 | 77.00 | 94.00 | a | 89.00 | 89.00 | 104.00 | 99.00 | 100.00 | 100.00 | 95.00 | 99.00 | 81.00 | 78.00 | 104.00 | ||||||||||||
| 1939 | 74.00 | 73.00 | 84.00 | 94.00 | 101.00 | 109.00 | 103.00 | 99.00 | 101.00 | 94.00 | 80.00 | 83.00 | 109.00 | |||||||||||||
| 1940 | 69.00 | 87.00 | 92.00 | 92.00 | 101.00 | 101.00 | a | 109.00 | 103.00 | 95.00 | 92.00 | 79.00 | 72.00 | 109.00 | ||||||||||||
| 1941 | 66.00 | 72.00 | 78.00 | 84.00 | 95.00 | 98.00 | 96.00 | 97.00 | a | 94.00 | 88.00 | 79.00 | 75.00 | 98.00 | ||||||||||||
| 1942 | 75.00 | 75.00 | 83.00 | 91.00 | 100.00 | 105.00 | 100.00 | 96.00 | e | 91.00 | b | 85.00 | 83.00 | 80.00 | 105.00 | |||||||||||
| 1943 | 79.00 | 81.00 | 85.00 | 96.00 | 97.00 | 98.00 | 104.00 | 105.00 | 98.00 | 91.00 | 84.00 | 63.00 | 105.00 | |||||||||||||
| 1944 | 69.00 | 73.00 | 82.00 | 87.00 | 95.00 | 103.00 | 103.00 | 107.00 | 95.00 | 87.00 | 83.00 | 67.00 | 107.00 | |||||||||||||
| 1945 | 67.00 | 83.00 | 82.00 | 83.00 | 102.00 | 107.00 | 99.00 | 100.00 | 98.00 | 88.00 | 79.00 | 71.00 | a | 107.00 | ||||||||||||
| 1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 93.00 | 85.00 | 80.00 | 75.00 | 93.00 | |||||
| 1947 | 72.00 | 76.00 | 84.00 | 88.00 | 104.00 | 105.00 | 101.00 | 101.00 | 104.00 | 91.00 | 77.00 | 69.00 | 105.00 | |||||||||||||
| 1948 | 80.00 | 79.00 | 85.00 | 96.00 | 98.00 | 105.00 | 103.00 | 103.00 | 105.00 | 90.00 | 81.00 | 76.00 | 105.00 | |||||||||||||
| 1949 | 67.00 | 74.00 | c | 82.00 | d | 87.00 | 97.00 | 99.00 | 100.00 | 100.00 | 96.00 | 88.00 | 84.00 | 71.00 | 100.00 | |||||||||||
| 1950 | 79.00 | a | 81.00 | 86.00 | 94.00 | 94.00 | 104.00 | 99.00 | 101.00 | 90.00 | 84.00 | 80.00 | 71.00 | 104.00 | ||||||||||||
| 1951 | 71.00 | 79.00 | 78.00 | 90.00 | 104.00 | 105.00 | 106.00 | 102.00 | 100.00 | 96.00 | 76.00 | 78.00 | 106.00 | |||||||||||||
| 1952 | 81.00 | 76.00 | 82.00 | 90.00 | 101.00 | 105.00 | 99.00 | 103.00 | 98.00 | 93.00 | 86.00 | 72.00 | 105.00 | |||||||||||||
| 1953 | 80.00 | 75.00 | 89.00 | 91.00 | 103.00 | 108.00 | 102.00 | 102.00 | 102.00 | 92.00 | 79.00 | 69.00 | 108.00 | |||||||||||||
| 1954 | 77.00 | 81.00 | 86.00 | 93.00 | b | 92.00 | 100.00 | 103.00 | a | 99.00 | a | 94.00 | 89.00 | a | 74.00 | 78.00 | c | 103.00 | ||||||||
| 1955 | 69.00 | 75.00 | a | 82.00 | 90.00 | 93.00 | 98.00 | c | 98.00 | 98.00 | 93.00 | 87.00 | 81.00 | ----- | z | 98.00 | ||||||||||
| 1956 | 79.00 | 81.00 | a | 89.00 | 94.00 | 96.00 | 103.00 | 100.00 | 98.00 | 99.00 | 94.00 | 85.00 | 74.00 | 103.00 | ||||||||||||
| 1957 | 80.00 | 83.00 | 80.00 | 90.00 | 90.00 | 104.00 | 101.00 | 99.00 | 95.00 | 89.00 | 74.00 | 73.00 | 104.00 | |||||||||||||
| 1958 | 68.00 | 74.00 | 76.00 | 88.00 | 102.00 | 103.00 | a | 106.00 | 104.00 | 93.00 | 86.00 | 80.00 | 82.00 | a | 106.00 | |||||||||||
| 1959 | 77.00 | 80.00 | 82.00 | 97.00 | 96.00 | 102.00 | 98.00 | 103.00 | 98.00 | 93.00 | 80.00 | a | 69.00 | 103.00 | ||||||||||||
| 1960 | 72.00 | 76.00 | 84.00 | a | 92.00 | 100.00 | 104.00 | 100.00 | 97.00 | 97.00 | 92.00 | 82.00 | 67.00 | e | 104.00 | |||||||||||
| 1961 | 70.00 | 81.00 | 84.00 | 93.00 | a | 99.00 | 100.00 | 94.00 | a | 93.00 | 93.00 | 89.00 | b | 78.00 | a | 76.00 | 100.00 | |||||||||
| 1962 | 70.00 | 86.00 | 85.00 | 90.00 | 100.00 | 98.00 | 97.00 | 98.00 | 91.00 | 89.00 | 78.00 | 76.00 | 100.00 | |||||||||||||
| 1963 | 77.00 | 82.00 | 90.00 | 93.00 | 99.00 | 96.00 | 99.00 | 95.00 | 96.00 | 90.00 | 82.00 | b | 72.00 | 99.00 | ||||||||||||
| 1964 | ----- | z | 64.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.00 | ||
| 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 | |
| 2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 73.49 | 78.72 | 83.90 | 90.09 | 96.61 | 101.66 | 101.04 | 99.98 | 96.14 | 90.08 | 80.18 | 73.16 | 104.03 | |||||||||||||
| S.D. | 5.25 | 5.54 | 3.86 | 4.00 | 4.38 | 4.51 | 3.29 | 3.41 | 3.77 | 3.32 | 3.95 | 5.46 | 2.88 | |||||||||||||
| SKEW | 0.32 | 0.40 | -0.01 | -0.06 | -0.34 | -1.23 | 0.34 | -0.43 | 0.31 | 0.22 | 0.09 | -0.54 | -0.25 | |||||||||||||
| MAX | 87.00 | 94.00 | 92.00 | 100.00 | 104.00 | 109.00 | 109.00 | 107.00 | 105.00 | 99.00 | 89.00 | 83.00 | 109.00 | |||||||||||||
| MIN | 66.00 | 64.00 | 76.00 | 82.00 | 84.00 | 84.00 | 94.00 | 91.00 | 89.00 | 84.00 | 72.00 | 59.00 | 98.00 | |||||||||||||
| NO YRS | 49 | 50 | 48 | 47 | 49 | 47 | 48 | 49 | 50 | 51 | 50 | 49 | 38 | |||||||||||||