| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 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 | 78.00 | 74.00 | 78.00 | 91.00 | 95.00 | 102.00 | 102.00 | 99.00 | 102.00 | a | 88.00 | a | 74.00 | 72.00 | 102.00 | |||||||||||
| 1949 | 62.00 | 74.00 | 81.00 | 85.00 | a | 93.00 | 100.00 | 99.00 | 98.00 | 98.00 | 88.00 | 83.00 | a | 69.00 | a | 100.00 | ||||||||||
| 1950 | 81.00 | 76.00 | a | 83.00 | a | 94.00 | a | 94.00 | b | 100.00 | 97.00 | a | 100.00 | b | 93.00 | a | 93.00 | 82.00 | 74.00 | 100.00 | ||||||
| 1951 | 77.00 | 79.00 | 78.00 | 90.00 | 97.00 | 102.00 | 106.00 | 103.00 | 100.00 | 91.00 | 75.00 | 73.00 | 106.00 | |||||||||||||
| 1952 | 75.00 | 72.00 | 76.00 | 88.00 | 96.00 | 104.00 | 101.00 | 100.00 | 95.00 | 89.00 | 81.00 | 69.00 | 104.00 | |||||||||||||
| 1953 | 75.00 | 73.00 | 81.00 | 90.00 | 100.00 | 106.00 | 104.00 | 101.00 | 97.00 | 92.00 | a | 78.00 | 65.00 | 106.00 | ||||||||||||
| 1954 | 71.00 | 78.00 | a | 83.00 | 91.00 | 93.00 | 103.00 | 102.00 | 101.00 | 98.00 | a | 94.00 | ----- | z | ----- | z | 103.00 | |||||||||
| 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 | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | 85.00 | 90.00 | 99.00 | 98.00 | 101.00 | 102.00 | 96.00 | 92.00 | 80.00 | 72.00 | 102.00 | |||||||||||
| 1963 | 73.00 | 81.00 | 89.00 | 88.00 | 96.00 | 101.00 | 104.00 | 98.00 | 93.00 | 91.00 | 80.00 | 73.00 | 104.00 | |||||||||||||
| 1964 | 70.00 | 65.00 | 82.00 | 89.00 | 98.00 | 102.00 | 106.00 | 104.00 | 98.00 | 90.00 | 80.00 | 74.00 | 106.00 | |||||||||||||
| 1965 | 71.00 | 76.00 | 78.00 | 97.00 | 94.00 | 97.00 | 102.00 | 99.00 | 93.00 | 90.00 | 78.00 | 74.00 | 102.00 | |||||||||||||
| 1966 | 66.00 | 67.00 | 86.00 | 87.00 | 98.00 | 98.00 | 104.00 | 100.00 | 95.00 | 86.00 | 81.00 | 72.00 | 104.00 | |||||||||||||
| 1967 | 76.00 | 76.00 | 86.00 | 90.00 | 96.00 | 101.00 | 98.00 | 96.00 | 94.00 | 92.00 | 82.00 | 66.00 | 101.00 | |||||||||||||
| 1968 | 72.00 | 72.00 | 80.00 | 81.00 | 97.00 | 109.00 | 102.00 | 99.00 | 95.00 | 91.00 | 76.00 | 73.00 | 109.00 | |||||||||||||
| 1969 | 72.00 | 72.00 | 76.00 | 87.00 | 96.00 | 101.00 | 105.00 | 104.00 | 92.00 | 90.00 | 77.00 | 70.00 | 105.00 | |||||||||||||
| 1970 | 74.00 | 80.00 | 81.00 | 85.00 | 95.00 | 104.00 | 102.00 | 100.00 | 97.00 | 86.00 | 77.00 | 76.00 | 104.00 | |||||||||||||
| 1971 | 78.00 | 75.00 | 90.00 | 90.00 | 94.00 | 98.00 | 101.00 | 97.00 | 96.00 | 87.00 | 82.00 | 74.00 | 101.00 | |||||||||||||
| 1972 | 79.00 | 80.00 | 86.00 | 95.00 | 96.00 | 102.00 | 99.00 | 95.00 | 90.00 | 88.00 | 71.00 | 69.00 | 102.00 | |||||||||||||
| 1973 | 66.00 | 69.00 | 76.00 | 86.00 | 92.00 | 104.00 | 104.00 | 101.00 | 94.00 | 93.00 | 85.00 | 75.00 | 104.00 | |||||||||||||
| 1974 | 79.00 | 75.00 | 86.00 | 89.00 | 101.00 | 104.00 | 102.00 | 100.00 | 100.00 | 86.00 | 75.00 | 67.00 | 104.00 | |||||||||||||
| 1975 | 77.00 | 72.00 | 80.00 | 85.00 | 93.00 | 102.00 | 99.00 | 100.00 | 94.00 | 89.00 | 84.00 | 76.00 | 102.00 | |||||||||||||
| 1976 | 73.00 | 80.00 | 85.00 | 86.00 | 95.00 | 101.00 | 99.00 | 99.00 | 94.00 | 88.00 | 76.00 | 70.00 | 101.00 | |||||||||||||
| 1977 | 60.00 | 77.00 | 79.00 | 87.00 | 99.00 | 107.00 | 103.00 | 103.00 | 97.00 | 87.00 | 82.00 | 75.00 | 107.00 | |||||||||||||
| 1978 | 64.00 | 70.00 | 88.00 | 89.00 | 100.00 | 107.00 | 103.00 | 102.00 | 98.00 | 91.00 | 81.00 | 67.00 | 107.00 | |||||||||||||
| 1979 | 61.00 | 83.00 | 79.00 | 88.00 | 93.00 | 102.00 | 105.00 | 96.00 | 99.00 | 97.00 | 70.00 | 73.00 | 105.00 | |||||||||||||
| 1980 | 75.00 | 78.00 | 77.00 | 89.00 | 96.00 | 109.00 | 104.00 | 101.00 | 95.00 | 86.00 | 86.00 | 79.00 | 109.00 | |||||||||||||
| 1981 | 70.00 | 81.00 | 81.00 | 93.00 | 93.00 | 108.00 | 105.00 | 96.00 | 93.00 | 85.00 | 80.00 | 75.00 | 108.00 | |||||||||||||
| 1982 | 73.00 | 82.00 | 84.00 | 89.00 | 92.00 | 99.00 | 102.00 | ----- | z | 97.00 | ----- | z | ----- | z | ----- | z | 102.00 | |||||||||
| 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 | 74.00 | 80.00 | b | 86.00 | 91.00 | k | 102.00 | 108.00 | 106.00 | c | 105.00 | a | 98.00 | a | 89.00 | 79.00 | 69.00 | 108.00 | ||||||||
| 2012 | 74.00 | 74.00 | c | 93.00 | d | 99.00 | a | 100.00 | 108.00 | 105.00 | 107.00 | 101.00 | 93.00 | a | 83.00 | 77.00 | 108.00 | |||||||||
| 2013 | 75.00 | 73.00 | 86.00 | 68.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.00 | z | 86.00 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 72.37 | 75.47 | 82.55 | 89.24 | 96.10 | 102.90 | 102.40 | 100.21 | 96.07 | 89.72 | 79.21 | 72.07 | 104.29 | |||||||||||||
| S.D. | 5.49 | 4.52 | 4.44 | 3.77 | 2.81 | 3.52 | 2.50 | 2.86 | 2.84 | 2.88 | 3.96 | 3.51 | 2.60 | |||||||||||||
| SKEW | -0.78 | -0.34 | 0.32 | 0.59 | 0.40 | 0.26 | -0.39 | 0.25 | 0.11 | 0.35 | -0.54 | -0.26 | 0.20 | |||||||||||||
| MAX | 81.00 | 83.00 | 93.00 | 99.00 | 102.00 | 109.00 | 106.00 | 107.00 | 102.00 | 97.00 | 86.00 | 79.00 | 109.00 | |||||||||||||
| MIN | 60.00 | 65.00 | 76.00 | 81.00 | 92.00 | 97.00 | 97.00 | 95.00 | 90.00 | 85.00 | 70.00 | 65.00 | 100.00 | |||||||||||||
| NO YRS | 30 | 30 | 31 | 29 | 30 | 30 | 30 | 29 | 30 | 29 | 28 | 28 | 24 | |||||||||||||