| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1937 | 56.00 | 66.00 | 82.00 | 80.00 | a | 87.00 | 100.00 | a | 105.00 | 102.00 | 100.00 | 84.00 | 68.00 | 69.00 | 105.00 | |||||||||||
| 1938 | 55.00 | 55.00 | 66.00 | 80.00 | 90.00 | d | 97.00 | a | 108.00 | 101.00 | 98.00 | 84.00 | 61.00 | 60.00 | a | 108.00 | ||||||||||
| 1939 | 60.00 | c | 61.00 | 79.00 | 90.00 | 90.00 | 109.00 | a | 111.00 | a | 105.00 | 98.00 | 91.00 | a | 75.00 | 70.00 | a | 111.00 | ||||||||
| 1940 | 74.00 | 68.00 | 79.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 79.00 | ||||
| 1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 88.00 | s | 91.00 | d | 68.00 | 67.00 | 91.00 | |||
| 1959 | 66.00 | 70.00 | 72.00 | 81.00 | 88.00 | 102.00 | 113.00 | 103.00 | 100.00 | a | 80.00 | 72.00 | 60.00 | 113.00 | ||||||||||||
| 1960 | 61.00 | 61.00 | 83.00 | 84.00 | a | 92.00 | 100.00 | 115.00 | 106.00 | 98.00 | 91.00 | 70.00 | 58.00 | 115.00 | ||||||||||||
| 1961 | 59.00 | 65.00 | 78.00 | 80.00 | 91.00 | 110.00 | 105.00 | 116.00 | 92.00 | 90.00 | 67.00 | 60.00 | 116.00 | |||||||||||||
| 1962 | 63.00 | 63.00 | 75.00 | 88.00 | 77.00 | 100.00 | 105.00 | 102.00 | 97.00 | 87.00 | 66.00 | 58.00 | 105.00 | |||||||||||||
| 1963 | 52.00 | 73.00 | 74.00 | 72.00 | 91.00 | 101.00 | 98.00 | 103.00 | 102.00 | 88.00 | 70.00 | 55.00 | 103.00 | |||||||||||||
| 1964 | 65.00 | 61.00 | 80.00 | 81.00 | 90.00 | 100.00 | 107.00 | 102.00 | 95.00 | 90.00 | 64.00 | 60.00 | 107.00 | |||||||||||||
| 1965 | 61.00 | 71.00 | 74.00 | 85.00 | 89.00 | 98.00 | 105.00 | 104.00 | 90.00 | 90.00 | 67.00 | 62.00 | 105.00 | |||||||||||||
| 1966 | 61.00 | 63.00 | 85.00 | 84.00 | 98.00 | 99.00 | 104.00 | 106.00 | 103.00 | 86.00 | 73.00 | 60.00 | 106.00 | |||||||||||||
| 1967 | 62.00 | 68.00 | 71.00 | 66.00 | 92.00 | 101.00 | 108.00 | 110.00 | 102.00 | 86.00 | 68.00 | 61.00 | 110.00 | |||||||||||||
| 1968 | 65.00 | 73.00 | 78.00 | 90.00 | 89.00 | 104.00 | 111.00 | 102.00 | 99.00 | 87.00 | 59.00 | 63.00 | 111.00 | |||||||||||||
| 1969 | 55.00 | 54.00 | 76.00 | 83.00 | 95.00 | 103.00 | 103.00 | 108.00 | 103.00 | 78.00 | 71.00 | 61.00 | 108.00 | |||||||||||||
| 1970 | 63.00 | 64.00 | 66.00 | 74.00 | 94.00 | 106.00 | 106.00 | 106.00 | 92.00 | 92.00 | 67.00 | 61.00 | 106.00 | |||||||||||||
| 1971 | 61.00 | 66.00 | 65.00 | 80.00 | 88.00 | 98.00 | 110.00 | 109.00 | 97.00 | 92.00 | 68.00 | 60.00 | 110.00 | |||||||||||||
| 1972 | 59.00 | 67.00 | 74.00 | 83.00 | a | 97.00 | 101.00 | 109.00 | 112.00 | 97.00 | 85.00 | 60.00 | 65.00 | 112.00 | ||||||||||||
| 1973 | 61.00 | 64.00 | 70.00 | 83.00 | 100.00 | 103.00 | 106.00 | 106.00 | 103.00 | 81.00 | 67.00 | 63.00 | 106.00 | |||||||||||||
| 1974 | 65.00 | 61.00 | 71.00 | 78.00 | 86.00 | 104.00 | 106.00 | 105.00 | 98.00 | 89.00 | 69.00 | 58.00 | 106.00 | |||||||||||||
| 1975 | 63.00 | 64.00 | 65.00 | 71.00 | 93.00 | 95.00 | 112.00 | 100.00 | 100.00 | 94.00 | 79.00 | 68.00 | 112.00 | |||||||||||||
| 1976 | 64.00 | 62.00 | 75.00 | 83.00 | 95.00 | 102.00 | 105.00 | 101.00 | 98.00 | 88.00 | 69.00 | 58.00 | 105.00 | |||||||||||||
| 1977 | 52.00 | 70.00 | 74.00 | 96.00 | 88.00 | 108.00 | 106.00 | a | 109.00 | 94.00 | a | 81.00 | 68.00 | 63.00 | 109.00 | |||||||||||
| 1978 | 56.00 | ----- | z | 78.00 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.00 | ||
| 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 | |
| 2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 60.79 | 64.78 | 74.58 | 81.45 | 90.91 | 101.86 | 107.18 | 105.36 | 98.00 | 87.17 | 68.09 | 61.74 | 108.50 | |||||||||||||
| S.D. | 4.92 | 4.96 | 5.62 | 6.72 | 4.82 | 3.83 | 3.79 | 4.02 | 3.68 | 4.29 | 4.51 | 3.84 | 3.71 | |||||||||||||
| SKEW | 0.28 | -0.28 | -0.16 | -0.23 | -0.63 | 0.55 | -0.01 | 0.91 | -0.50 | -0.53 | 0.07 | 0.68 | 0.53 | |||||||||||||
| MAX | 74.00 | 73.00 | 85.00 | 96.00 | 100.00 | 110.00 | 115.00 | 116.00 | 103.00 | 94.00 | 79.00 | 70.00 | 116.00 | |||||||||||||
| MIN | 52.00 | 54.00 | 65.00 | 66.00 | 77.00 | 95.00 | 98.00 | 100.00 | 90.00 | 78.00 | 59.00 | 55.00 | 103.00 | |||||||||||||
| NO YRS | 24 | 23 | 24 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 20 | |||||||||||||