YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | 79.12 | v | 83.48 | 101.03 | 101.68 | 96.00 | 93.20 | 83.29 | 68.73 | 64.32 | 86.47 | d | ||||||||
1936 | 64.00 | 64.24 | 75.26 | 84.90 | 93.19 | 101.43 | 102.52 | 100.16 | 93.60 | 84.19 | 69.54 | b | 62.39 | 82.95 | ||||||||||||
1937 | 48.94 | 64.18 | 69.52 | 79.83 | 91.10 | 98.60 | 102.87 | a | 103.35 | 98.50 | 89.55 | 76.60 | 67.29 | 82.53 | ||||||||||||
1938 | 65.90 | 63.50 | 67.55 | 80.90 | 88.94 | 99.13 | 103.16 | 101.00 | 98.14 | i | 83.89 | d | 70.40 | 66.61 | 81.00 | a | ||||||||||
1939 | 61.45 | 55.89 | 74.39 | 84.40 | 91.61 | 99.57 | 105.23 | 102.13 | 90.60 | 83.87 | 75.93 | 72.10 | 83.10 | |||||||||||||
1940 | 66.84 | 65.79 | 77.16 | 82.57 | 96.39 | 102.83 | 104.97 | 103.90 | 95.77 | 86.00 | 71.43 | 66.68 | 85.03 | |||||||||||||
1941 | 62.84 | 67.61 | 68.23 | 71.03 | 88.90 | 96.40 | 104.13 | 101.45 | 94.27 | 78.61 | 75.43 | 63.06 | 81.00 | |||||||||||||
1942 | 65.45 | 63.39 | 70.68 | 79.23 | 90.39 | 100.10 | 106.32 | 100.77 | 98.37 | 85.71 | 78.55 | a | 70.69 | e | 84.14 | |||||||||||
1943 | 65.13 | 72.11 | a | 75.10 | 85.63 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.49 | h | |||
1944 | ----- | z | 57.57 | v | 70.71 | 76.33 | 89.19 | 94.53 | 103.68 | 106.19 | 96.40 | 87.58 | 67.28 | a | 64.90 | 85.68 | b | |||||||||
1945 | 63.06 | 66.38 | b | 66.03 | 80.80 | 89.29 | 97.63 | 105.45 | 100.81 | 97.73 | 87.39 | ----- | z | ----- | z | 85.46 | b | |||||||||
1946 | ----- | z | ----- | z | ----- | z | 88.79 | f | 90.80 | a | 102.80 | 104.19 | 102.45 | ----- | z | ----- | z | ----- | z | ----- | z | 100.06 | h | |||
1947 | ----- | z | ----- | z | ----- | z | 81.85 | c | 92.06 | 96.66 | a | 104.71 | 98.20 | a | 98.80 | 84.90 | 65.90 | 60.28 | b | 87.04 | c | |||||
1948 | 68.14 | b | 62.72 | 65.81 | 78.65 | j | 90.32 | 97.30 | 102.90 | 101.29 | 97.77 | 84.19 | 69.23 | 60.71 | 81.85 | a | ||||||||||
1949 | 48.42 | 62.64 | 71.42 | 84.00 | 88.03 | 98.77 | 102.35 | 101.71 | 97.57 | 81.19 | 80.00 | 62.03 | 81.51 | |||||||||||||
1950 | 60.48 | 71.25 | 75.45 | 85.57 | 88.45 | 98.17 | 99.81 | 102.45 | 93.97 | 92.00 | ----- | z | ----- | z | 86.76 | b | ||||||||||
1951 | 63.43 | a | 65.93 | 72.45 | 78.50 | 88.87 | 97.03 | 104.87 | 98.32 | 98.43 | 84.84 | 69.57 | 60.35 | 81.88 | ||||||||||||
1952 | 60.19 | 65.07 | 63.06 | 77.50 | 92.26 | 97.70 | 102.71 | 102.48 | 98.87 | 93.77 | 68.27 | 61.52 | 81.95 | |||||||||||||
1953 | 68.77 | a | 67.25 | 73.33 | a | 78.63 | 82.87 | 99.33 | 103.16 | 101.81 | 101.07 | 86.65 | 75.23 | 63.00 | 83.43 | |||||||||||
1954 | 63.90 | 74.93 | 69.58 | 85.93 | 91.97 | 97.43 | 103.93 | b | 99.26 | 97.93 | 88.68 | 77.70 | 66.00 | 84.77 | ||||||||||||
1955 | 55.94 | 63.18 | 73.55 | 78.70 | 86.71 | 98.00 | 99.35 | 97.00 | 97.53 | 90.35 | 72.67 | 67.87 | 81.74 | |||||||||||||
1956 | 67.83 | a | 62.00 | 77.68 | 79.77 | 91.13 | 101.43 | 101.65 | 101.29 | 102.67 | 85.13 | a | 74.23 | 67.62 | b | 84.37 | ||||||||||
1957 | 60.26 | 72.57 | 72.90 | a | 78.90 | 84.74 | 102.67 | 105.35 | 101.10 | a | 98.67 | 78.77 | 65.73 | 66.81 | 82.37 | |||||||||||
1958 | 65.81 | 68.15 | a | 65.81 | 78.55 | a | 95.90 | 100.80 | 105.55 | 103.13 | a | 96.00 | 86.90 | 79.25 | r | ----- | z | 86.66 | b | |||||||
1959 | 67.39 | 62.63 | a | 76.55 | 86.24 | a | 87.13 | 102.60 | 106.32 | 98.23 | 94.45 | a | 86.45 | 72.90 | 63.13 | 83.67 | ||||||||||
1960 | 57.58 | 60.59 | 76.00 | 83.69 | a | 90.74 | 103.63 | ----- | z | ----- | z | 97.10 | 80.68 | 71.73 | 62.80 | a | 78.45 | b | ||||||||
1961 | 66.71 | 68.57 | 71.13 | 81.79 | a | 87.10 | a | 102.53 | 104.70 | a | 100.17 | a | 92.30 | 84.45 | 66.93 | 60.87 | 82.27 | |||||||||
1962 | 61.34 | b | 63.29 | 65.93 | a | 85.83 | 85.19 | 96.70 | 101.71 | 103.74 | 95.03 | 84.39 | 75.77 | 66.16 | 82.09 | |||||||||||
1963 | 59.68 | 72.21 | 70.94 | 75.53 | 90.39 | 93.07 | 103.43 | a | 97.80 | a | 97.10 | a | 86.29 | 70.50 | 66.55 | 81.96 | ||||||||||
1964 | 59.13 | a | 62.76 | 68.35 | 78.38 | a | 87.68 | 96.33 | 103.10 | 99.07 | a | 93.67 | 89.55 | b | 66.53 | 61.87 | 80.54 | |||||||||
1965 | 64.61 | 66.61 | 67.07 | b | 75.07 | 85.68 | 92.83 | a | 102.71 | 102.06 | 92.31 | a | 90.48 | b | ----- | z | 62.33 | a | 81.98 | a | ||||||
1966 | 60.03 | 60.93 | 76.39 | 85.07 | 93.97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.28 | g | |||||
1967 | ----- | z | ----- | z | 75.44 | v | 73.87 | 89.03 | 94.27 | 102.39 | 101.67 | d | 93.77 | 89.65 | 77.73 | 60.23 | 86.95 | c | ||||||||
1968 | 65.43 | h | 71.41 | 71.61 | 81.14 | a | 90.03 | 103.10 | 106.00 | 99.61 | 99.33 | 89.61 | 76.87 | 62.57 | a | 86.48 | a | |||||||||
1969 | 65.74 | 66.86 | 67.19 | 86.52 | a | 98.26 | 102.86 | b | 105.03 | 106.87 | 99.90 | 83.45 | 72.57 | 65.55 | 85.07 | |||||||||||
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | 66.46 | b | 71.68 | 80.23 | 89.87 | 103.97 | 99.10 | 99.35 | 94.30 | 81.54 | e | 71.37 | 60.48 | 83.49 | a | |||||||||
1975 | 63.93 | a | 64.43 | 68.61 | 72.65 | d | 86.87 | 96.23 | 100.35 | 99.87 | 94.40 | 82.45 | 71.93 | 64.03 | 80.48 | |||||||||||
1976 | 65.90 | 65.69 | 69.19 | 76.63 | 89.32 | 98.70 | 99.90 | 98.84 | 88.70 | 79.97 | 73.57 | 64.84 | 80.94 | |||||||||||||
1977 | 60.32 | 71.07 | 67.32 | 80.57 | 79.90 | 99.03 | 100.74 | 99.29 | 94.77 | d | 85.71 | 75.20 | 67.87 | 81.82 | ||||||||||||
1978 | 59.74 | 62.00 | 69.58 | 74.30 | 86.23 | 100.82 | b | 102.74 | 99.87 | 93.10 | 87.61 | 67.27 | 58.26 | 80.13 | ||||||||||||
1979 | 53.48 | 63.61 | 66.65 | 78.00 | 85.26 | 98.13 | 102.03 | 97.45 | ----- | z | 87.68 | 68.77 | 67.77 | 78.98 | a | |||||||||||
1980 | 61.48 | 66.14 | 66.06 | 77.50 | 81.52 | 99.23 | 103.74 | 99.55 | 95.50 | 85.90 | 75.13 | 70.90 | 81.89 | |||||||||||||
1981 | 67.13 | 69.18 | 67.87 | 82.67 | 86.52 | 101.53 | 101.94 | 101.45 | 93.93 | 79.06 | 74.73 | 66.55 | 82.71 | |||||||||||||
1982 | 60.37 | a | 65.32 | 66.03 | 77.60 | 86.06 | 94.60 | 98.97 | 96.97 | a | 91.68 | b | 81.71 | 67.27 | 58.74 | 78.78 | ||||||||||
1983 | 63.52 | 62.61 | 66.10 | 72.31 | a | 88.35 | 96.03 | 101.52 | 95.77 | 94.07 | 81.10 | 68.77 | 63.23 | 79.45 | ||||||||||||
1984 | 68.14 | b | ----- | z | 75.35 | 77.47 | 96.03 | a | 95.53 | 98.39 | 97.32 | 94.50 | 77.35 | 68.70 | 57.39 | 82.38 | a | |||||||||
1985 | 58.97 | 64.21 | 70.03 | 83.53 | 88.71 | 100.80 | 102.19 | 101.19 | 86.70 | 80.74 | 65.27 | 64.16 | 80.54 | |||||||||||||
1986 | 69.45 | 67.11 | 74.65 | 79.47 | 90.19 | 100.10 | 97.48 | 99.81 | 87.90 | 79.74 | ----- | z | 61.74 | 82.51 | a | |||||||||||
1987 | 60.60 | a | 64.00 | 68.06 | ----- | z | ----- | z | 99.30 | 98.74 | 98.81 | 93.30 | 85.58 | 68.10 | a | 57.19 | 79.37 | b | ||||||||
1988 | ----- | z | 68.48 | 73.19 | ----- | z | 87.61 | 98.17 | 103.45 | 97.26 | 93.47 | 90.00 | 72.60 | 62.61 | 84.68 | b | ||||||||||
1989 | 60.94 | 67.86 | 77.00 | 88.23 | 89.55 | 100.00 | 104.13 | 98.35 | 94.97 | 83.32 | 74.90 | 65.72 | b | 83.75 | ||||||||||||
1990 | 61.39 | 61.75 | 73.06 | 81.53 | 87.30 | d | 101.83 | 99.19 | 97.47 | a | 93.73 | 85.10 | 73.34 | a | 60.97 | b | 81.39 | |||||||||
1991 | 62.81 | 72.50 | 65.79 | b | 78.73 | 86.32 | 93.97 | 101.61 | 99.39 | 94.17 | 86.77 | 70.71 | b | 61.29 | 81.17 | |||||||||||
1992 | 62.13 | 67.03 | 67.42 | 83.33 | 89.58 | 97.27 | 100.23 | 98.84 | 96.17 | 86.35 | 67.60 | 58.19 | 81.18 | |||||||||||||
1993 | 61.10 | 61.22 | a | 73.39 | 81.97 | 90.87 | 98.43 | 99.97 | 98.42 | 94.50 | 81.93 | b | 68.77 | 64.34 | b | 81.24 | ||||||||||
1994 | 67.65 | 62.71 | 73.26 | 81.53 | 85.81 | 101.37 | 102.06 | 102.81 | 96.43 | b | 81.90 | 66.00 | b | 63.06 | 82.05 | |||||||||||
1995 | 59.65 | 71.11 | 70.45 | 76.23 | 82.16 | 94.37 | 102.84 | 103.26 | 97.87 | 88.90 | a | 78.67 | 68.74 | 82.85 | ||||||||||||
1996 | 66.23 | 70.34 | 74.19 | 84.50 | 92.48 | 100.63 | 103.13 | a | 102.77 | 91.80 | 84.71 | 75.37 | 65.35 | 84.29 | ||||||||||||
1997 | ----- | z | 65.64 | 80.13 | 77.50 | b | 95.19 | 95.47 | 101.39 | ----- | z | 94.77 | 79.53 | a | 72.87 | 59.45 | 82.19 | b | ||||||||
1998 | ----- | z | 57.86 | 68.23 | 73.20 | 82.50 | a | 93.07 | 103.26 | 101.03 | 94.10 | 83.39 | 73.07 | 63.42 | 81.19 | a | ||||||||||
1999 | 67.89 | c | 69.04 | 73.03 | 73.00 | 87.42 | 95.40 | 97.06 | 99.23 | 95.03 | 89.87 | 78.83 | 65.19 | 82.58 | ||||||||||||
2000 | 67.84 | 68.45 | 71.50 | a | 85.17 | 93.77 | 98.17 | 101.13 | 98.29 | 95.73 | 77.68 | 64.30 | ----- | z | 83.82 | a | ||||||||||
2001 | 57.91 | i | 61.88 | b | 72.87 | 81.41 | a | 96.00 | a | 101.25 | b | 100.57 | c | ----- | z | ----- | z | ----- | z | 79.67 | r | ----- | z | 85.67 | f | |
2002 | 63.67 | d | 72.72 | c | 72.81 | 85.12 | n | 93.18 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 69.73 | i | |
2003 | ----- | z | 65.44 | j | 70.35 | 76.20 | 89.97 | 98.80 | ----- | z | ----- | z | ----- | z | ----- | z | 69.43 | i | 62.22 | m | 83.83 | h | ||||
2004 | 65.52 | h | ----- | z | 84.44 | o | 80.48 | g | 92.18 | i | 100.14 | i | 102.11 | c | 100.11 | d | 95.83 | f | 83.19 | d | 66.12 | m | 62.75 | o | 95.13 | i |
2005 | 61.96 | g | 63.96 | b | 72.65 | h | 82.55 | j | 90.05 | k | 96.93 | p | 107.56 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.96 | k |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 100.63 | ----- | z | ----- | z | ----- | z | ----- | z | 78.35 | j | 65.67 | m | 100.63 | k | |
2007 | 64.10 | j | 68.00 | i | 75.90 | k | 82.45 | j | 91.30 | k | 100.30 | j | 104.56 | m | 102.38 | o | 100.33 | u | 88.00 | w | 80.70 | j | 62.43 | q | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | 81.73 | h | 87.33 | m | 102.80 | j | 103.94 | m | 102.88 | n | 98.56 | l | 93.50 | m | 78.94 | l | 63.59 | n | ----- | z |
2009 | 69.86 | q | 70.59 | k | 78.93 | q | 81.84 | k | 95.56 | o | 96.11 | l | 106.77 | i | 103.94 | n | 99.55 | j | 83.77 | i | 79.87 | o | 63.93 | q | ----- | z |
2010 | 66.00 | q | 65.61 | j | 69.10 | 77.10 | 84.08 | e | 95.64 | p | 103.45 | 99.48 | ----- | z | 82.13 | 70.73 | 66.48 | 81.57 | d | |||||||
2011 | 64.17 | a | 62.21 | 74.13 | 82.17 | 87.00 | 99.60 | 100.89 | c | 107.29 | q | 98.33 | 86.45 | 69.80 | 59.28 | b | 80.37 | a | ||||||||
2012 | 71.83 | s | 67.38 | 73.71 | 74.80 | y | 92.55 | 101.17 | 99.87 | a | ----- | z | 95.28 | a | 92.60 | u | 74.86 | h | 68.62 | r | 88.32 | f | ||||
2013 | 60.33 | a | 63.50 | 78.00 | 82.73 | 92.23 | i | 102.80 | 100.84 | 98.71 | 91.60 | 80.39 | 72.97 | 63.06 | 81.36 | a | ||||||||||
2014 | 71.00 | 71.54 | 76.00 | 81.73 | 88.97 | 99.60 | 100.45 | 95.16 | 92.93 | 86.71 | 73.43 | 61.68 | 83.27 | |||||||||||||
2015 | 64.81 | 73.46 | 77.52 | 79.83 | 82.00 | 100.50 | 97.87 | 101.26 | 94.87 | 83.10 | 68.03 | 61.42 | 82.06 | |||||||||||||
2016 | 61.94 | 74.90 | 78.06 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.63 | i | |||
2017 | ----- | z | 65.79 | 69.38 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.79 | k | |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 101.60 | p | ----- | z | ----- | z | 78.10 | ----- | z | ----- | z | 78.10 | k | |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 62.85 | 66.18 | 71.43 | 80.09 | 88.92 | 98.88 | 102.23 | 100.20 | 95.18 | 84.67 | 71.73 | 63.66 | 82.22 | |||||||||||||
S.D. | 4.46 | 4.09 | 3.92 | 4.01 | 3.85 | 2.85 | 2.24 | 2.36 | 2.98 | 3.75 | 3.96 | 3.36 | 1.48 | |||||||||||||
SKEW | -1.01 | 0.20 | 0.07 | -0.19 | 0.06 | -0.28 | -0.24 | 0.34 | -0.25 | 0.06 | 0.15 | 0.27 | 0.03 | |||||||||||||
MAX | 71.00 | 74.93 | 80.13 | 88.23 | 98.26 | 103.97 | 106.32 | 106.87 | 102.67 | 93.77 | 80.00 | 72.10 | 85.07 | |||||||||||||
MIN | 48.42 | 55.89 | 63.06 | 71.03 | 79.90 | 92.83 | 97.06 | 95.16 | 86.70 | 77.35 | 64.30 | 57.19 | 78.78 | |||||||||||||
YRS | 58 | 66 | 68 | 64 | 67 | 68 | 67 | 63 | 62 | 66 | 59 | 60 | 40 |