| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 96.00 | i | 103.00 | j | 98.00 | 92.00 | i | 81.00 | i | 72.00 | d | 68.00 | b | ----- | z | |
| 1942 | 65.00 | d | 61.00 | b | 76.00 | a | 77.00 | w | 91.00 | u | 99.00 | c | 105.00 | e | 99.00 | q | 94.00 | j | 87.00 | a | 74.00 | k | 69.00 | e | ----- | z |
| 1943 | 65.00 | b | 71.00 | b | 77.00 | a | 83.00 | d | 82.00 | u | 95.00 | c | 103.00 | e | 97.00 | h | 96.00 | c | 87.00 | m | 75.00 | c | 62.00 | m | ----- | z |
| 1944 | 61.00 | a | 66.00 | c | 70.00 | e | ----- | z | 88.00 | j | 92.00 | g | 103.00 | c | 103.00 | a | 98.00 | b | 88.00 | a | 73.00 | b | 61.00 | c | ----- | z |
| 1945 | 68.00 | a | 69.00 | b | 71.00 | c | 85.00 | h | 87.00 | m | 99.00 | c | 101.00 | a | 97.00 | c | 97.00 | 85.00 | m | 77.00 | 56.00 | o | ----- | z | ||
| 1946 | 64.00 | e | 71.00 | b | 76.00 | b | 88.00 | c | 89.00 | 98.00 | 100.00 | 104.00 | 94.00 | b | 78.00 | 70.00 | a | 68.00 | 104.00 | o | ||||||
| 1947 | ----- | z | 69.00 | h | 75.00 | c | 84.00 | e | 97.00 | e | 95.00 | c | 102.00 | a | 100.00 | f | 99.00 | b | ----- | z | 76.00 | 60.00 | d | ----- | z | |
| 1948 | 65.00 | a | 51.00 | u | ----- | z | ----- | z | 89.00 | d | 98.00 | b | 101.00 | d | 100.00 | b | 87.00 | r | 86.00 | d | 67.00 | v | ----- | z | ----- | z |
| 1949 | 42.00 | r | 63.00 | 70.00 | c | 87.00 | k | 93.00 | f | 96.00 | a | 104.00 | c | 100.00 | c | 96.00 | b | 85.00 | t | 80.00 | f | 68.00 | e | ----- | z | |
| 1950 | 64.00 | s | 70.00 | c | 75.00 | m | 85.00 | a | 95.00 | f | 105.00 | l | 104.00 | f | 103.00 | a | 104.00 | 92.00 | d | 74.00 | x | 73.00 | f | ----- | z | |
| 1951 | 71.00 | 73.00 | a | 74.00 | k | 81.00 | c | 98.00 | c | 100.00 | n | 102.00 | f | 99.00 | c | 95.00 | d | 86.00 | c | 70.00 | l | 56.00 | c | ----- | z | |
| 1952 | 60.00 | a | 64.00 | a | 68.00 | 81.00 | d | 89.00 | c | 94.00 | c | 100.00 | c | 103.00 | f | 96.00 | f | 88.00 | a | 73.00 | b | 64.00 | d | ----- | z | |
| 1953 | 68.00 | 68.00 | 77.00 | c | 83.00 | d | 84.00 | b | 99.00 | d | 103.00 | f | 97.00 | c | 93.00 | u | 88.00 | i | 75.00 | g | 61.00 | a | ----- | z | ||
| 1954 | 67.00 | 71.00 | 73.00 | 85.00 | d | 90.00 | f | 108.00 | b | 103.00 | d | 100.00 | f | 93.00 | l | 85.00 | b | 75.00 | n | 63.00 | m | ----- | z | |||
| 1955 | 54.00 | b | 67.00 | b | 70.00 | h | 78.00 | b | 87.00 | f | 101.00 | b | 102.00 | f | 97.00 | 100.00 | c | 86.00 | 74.00 | 64.00 | ----- | z | ||||
| 1956 | 68.00 | 63.00 | 80.00 | c | 82.00 | a | 92.00 | 104.00 | a | 102.00 | b | 96.00 | a | 97.00 | a | 86.00 | a | 76.00 | b | 62.00 | f | 104.00 | r | |||
| 1957 | 54.00 | e | 73.00 | b | 71.00 | b | 77.00 | 88.00 | d | 103.00 | c | 101.00 | b | 100.00 | a | 98.00 | b | 85.00 | a | 66.00 | 64.00 | e | ----- | z | ||
| 1958 | 62.00 | c | 70.00 | b | 65.00 | a | 82.00 | d | 94.00 | a | 99.00 | a | 103.00 | 103.00 | b | 97.00 | b | 87.00 | m | 74.00 | b | 70.00 | i | ----- | z | |
| 1959 | 66.00 | b | 65.00 | 70.00 | b | 83.00 | d | 92.00 | e | 100.00 | b | 105.00 | 98.00 | b | 95.00 | a | 88.00 | a | 71.00 | b | 67.00 | f | ----- | z | ||
| 1960 | 56.00 | b | 62.00 | c | 78.00 | b | 84.00 | f | 94.00 | 98.00 | 106.00 | 100.00 | 94.00 | 85.00 | 77.00 | p | 60.00 | r | ----- | z | ||||||
| 1961 | 59.00 | r | 66.00 | 73.00 | a | 85.00 | a | 89.00 | 104.00 | a | 105.00 | 99.00 | a | 89.00 | a | 84.00 | 65.00 | 57.00 | q | ----- | z | |||||
| 1962 | 64.00 | 67.00 | 75.00 | 89.00 | 87.00 | a | 102.00 | 102.00 | s | 103.00 | d | 97.00 | a | 84.00 | 79.00 | e | 67.00 | ----- | z | |||||||
| 1963 | 60.00 | e | 75.00 | 72.00 | 82.00 | c | 93.00 | b | 97.00 | d | 100.00 | 102.00 | a | 96.00 | b | 94.00 | a | 72.00 | i | 62.00 | b | ----- | z | |||
| 1964 | 63.00 | 63.00 | a | 77.00 | a | 81.00 | b | 91.00 | 98.00 | 102.00 | b | 98.00 | 94.00 | b | 93.00 | 74.00 | h | 67.00 | e | 102.00 | u | |||||
| 1965 | 68.00 | d | 68.00 | c | 72.00 | e | 82.00 | a | 86.00 | b | 93.00 | e | 99.00 | 99.00 | a | 90.00 | e | 91.00 | d | 76.00 | n | 55.00 | l | ----- | z | |
| 1966 | 60.00 | 58.00 | 84.00 | 84.00 | b | 93.00 | b | 98.00 | i | 100.00 | 104.00 | d | 94.00 | 81.00 | 75.00 | 63.00 | a | 104.00 | r | |||||||
| 1967 | 61.00 | p | 71.00 | 76.00 | 71.00 | b | 94.00 | c | 100.00 | c | 104.00 | 98.00 | 94.00 | 86.00 | 77.00 | 55.00 | 104.00 | x | ||||||||
| 1968 | 60.00 | j | 71.00 | 79.00 | d | ----- | z | 95.00 | 103.00 | b | 100.00 | 93.00 | 95.00 | 84.00 | 71.00 | 61.00 | l | ----- | z | |||||||
| 1969 | 62.00 | d | 59.00 | 78.00 | b | 84.00 | 93.00 | 97.00 | h | 102.00 | a | 100.00 | a | 96.00 | b | 86.00 | 72.00 | c | ----- | z | ----- | z | ||||
| 1970 | 63.00 | b | 68.00 | a | 74.00 | c | 74.00 | j | 91.00 | b | 107.00 | b | 106.00 | 102.00 | d | 93.00 | 86.00 | a | 71.00 | ----- | z | ----- | z | |||
| 1971 | 72.00 | 72.00 | 82.00 | d | 86.00 | 85.00 | 103.00 | b | 105.00 | 100.00 | b | 99.00 | 87.00 | 74.00 | 56.00 | n | 105.00 | v | ||||||||
| 1972 | 60.00 | 72.00 | 82.00 | f | 80.00 | 90.00 | h | 103.00 | a | 107.00 | a | 103.00 | 93.00 | 86.00 | a | 66.00 | ----- | z | ----- | z | ||||||
| 1973 | 57.00 | 64.00 | a | 64.00 | 81.00 | b | 93.00 | b | 106.00 | 105.00 | a | 103.00 | a | 96.00 | 86.00 | b | ----- | z | 58.00 | u | ----- | z | ||||
| 1974 | 58.00 | a | 65.00 | 76.00 | 78.00 | d | 96.00 | b | 104.00 | a | 101.00 | b | 100.00 | 96.00 | 88.00 | a | 69.00 | ----- | z | ----- | z | |||||
| 1975 | 65.00 | 69.00 | 71.00 | 78.00 | b | 90.00 | e | 100.00 | 102.00 | 102.00 | 94.00 | a | 88.00 | a | 79.00 | 68.00 | d | 102.00 | m | |||||||
| 1976 | 71.00 | h | 68.00 | b | 73.00 | a | 78.00 | 90.00 | a | 105.00 | c | 102.00 | a | 98.00 | 96.00 | a | 82.00 | a | 79.00 | ----- | z | ----- | z | |||
| 1977 | 65.00 | 72.00 | c | 72.00 | b | 85.00 | c | 93.00 | 100.00 | a | 103.00 | a | 103.00 | 100.00 | 86.00 | c | 72.00 | ----- | z | ----- | z | |||||
| 1978 | 59.00 | 66.00 | a | 75.00 | b | 78.00 | a | 90.00 | d | 98.00 | a | 103.00 | 102.00 | 96.00 | b | 91.00 | b | 75.00 | 55.00 | a | 103.00 | n | ||||
| 1979 | 50.00 | a | ----- | z | 74.00 | b | 81.00 | c | 91.00 | c | 101.00 | 101.00 | 104.00 | 97.00 | 91.00 | c | 65.00 | b | 67.00 | ----- | z | |||||
| 1980 | 55.00 | b | 67.00 | 64.00 | c | 87.00 | c | 88.00 | 99.00 | 103.00 | ----- | z | ----- | z | ----- | z | ----- | z | 71.00 | l | ----- | z | ||||
| 1981 | 65.00 | k | 73.00 | h | 72.00 | j | 92.00 | i | 91.00 | h | 105.00 | 105.00 | 105.00 | 92.00 | 78.00 | 74.00 | 67.00 | k | ----- | z | ||||||
| 1982 | 59.00 | a | 71.00 | 62.00 | t | 82.00 | a | 87.00 | 98.00 | 101.00 | a | 99.00 | a | 97.00 | a | 77.00 | 69.00 | 60.00 | c | ----- | z | |||||
| 1983 | 63.00 | ----- | z | 71.00 | b | 76.00 | a | 96.00 | 96.00 | a | 100.00 | b | 97.00 | 95.00 | b | 79.00 | f | 71.00 | d | 61.00 | b | ----- | z | |||
| 1984 | 65.00 | 66.00 | b | 73.00 | c | 85.00 | d | 97.00 | 101.00 | d | 101.00 | 96.00 | 95.00 | 81.00 | a | ----- | z | 56.00 | q | ----- | z | |||||
| 1985 | 64.00 | i | 68.00 | i | 71.00 | e | 85.00 | f | 89.00 | a | 104.00 | 108.00 | b | 103.00 | 90.00 | d | 87.00 | d | 72.00 | u | ----- | z | ----- | z | ||
| 1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 108.00 | v | ----- | z | ----- | z | 78.00 | y | ----- | z | ----- | z | ----- | z |
| 2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 62.34 | 67.50 | 73.59 | 81.91 | 91.26 | 100.33 | 102.67 | 100.21 | 95.63 | 86.03 | 72.67 | 63.24 | 0.0 | |||||||||||||
| S.D. | 5.03 | 4.07 | 4.48 | 3.72 | 3.55 | 3.65 | 2.20 | 2.81 | 2.88 | 3.92 | 3.97 | 4.44 | 0.0 | |||||||||||||
| SKEW | -0.35 | -0.40 | -0.10 | -0.58 | -0.02 | 0.09 | 0.48 | -0.29 | 0.13 | -0.31 | -0.33 | -0.48 | 0.00 | |||||||||||||
| MAX | 72.00 | 75.00 | 84.00 | 89.00 | 98.00 | 108.00 | 108.00 | 105.00 | 104.00 | 94.00 | 79.00 | 69.00 | -9999 | |||||||||||||
| MIN | 50.00 | 58.00 | 64.00 | 71.00 | 84.00 | 93.00 | 99.00 | 93.00 | 89.00 | 77.00 | 65.00 | 55.00 | 9999 | |||||||||||||
| YRS | 35 | 38 | 37 | 34 | 34 | 39 | 39 | 39 | 38 | 36 | 30 | 21 | 0 | |||||||||||||