YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1932 | ----- | z | ----- | z | 82.00 | a | 87.43 | 93.84 | 101.47 | 104.74 | 105.45 | 103.57 | 88.42 | 82.47 | 65.48 | 91.49 | b | |||||||||
1933 | 66.45 | 68.50 | 82.26 | 83.27 | 89.84 | ----- | z | 107.16 | 106.71 | 103.23 | 96.58 | 83.23 | 73.61 | 87.35 | a | |||||||||||
1934 | 74.42 | 78.75 | 91.74 | 93.37 | 100.10 | 101.23 | 112.48 | 110.42 | 105.00 | 96.71 | 82.90 | 71.39 | 93.21 | |||||||||||||
1935 | 69.00 | a | 73.07 | 77.52 | 86.20 | 91.52 | 107.67 | 106.87 | 105.19 | 104.10 | 90.00 | 75.97 | 70.97 | 88.17 | ||||||||||||
1936 | 70.10 | 74.21 | 83.58 | 91.30 | 98.74 | 106.13 | 109.71 | 108.00 | 103.07 | a | 91.42 | 79.17 | 71.84 | 90.61 | ||||||||||||
1937 | 59.97 | 74.07 | 79.94 | 87.34 | a | 96.94 | 105.43 | 109.52 | 108.26 | 106.03 | a | 96.90 | 83.41 | a | 74.19 | 90.17 | ||||||||||
1938 | 74.45 | 72.18 | 76.19 | 89.03 | a | 96.87 | a | 104.27 | 108.65 | 107.10 | 106.13 | 92.13 | a | 76.67 | 73.23 | a | 89.74 | |||||||||
1939 | 69.16 | 67.82 | 81.71 | 92.77 | 98.90 | 105.07 | 110.87 | 109.55 | 97.89 | b | 91.16 | 82.40 | 78.42 | 90.48 | ||||||||||||
1940 | 72.84 | 74.00 | 84.81 | 90.00 | b | 101.65 | 109.20 | 112.77 | 112.29 | 102.53 | 94.84 | 79.10 | 72.45 | 92.21 | ||||||||||||
1941 | 68.74 | 75.00 | 79.90 | 83.83 | a | 98.13 | 101.97 | a | 108.87 | 104.10 | a | 98.90 | 86.13 | 81.20 | 71.65 | 88.20 | ||||||||||
1942 | 72.13 | 70.46 | 77.77 | 82.73 | 94.13 | 102.80 | 110.81 | 106.40 | a | 104.63 | 91.84 | 81.60 | 73.77 | 89.09 | ||||||||||||
1943 | 71.97 | 76.54 | 82.68 | 89.90 | 98.13 | 101.80 | 111.81 | 105.87 | 107.17 | a | 94.73 | a | 81.87 | 67.77 | 90.85 | |||||||||||
1944 | 68.29 | 68.10 | 76.32 | 83.53 | 94.03 | a | 97.40 | 109.68 | 111.00 | 104.00 | 94.13 | 74.20 | 71.10 | 87.65 | ||||||||||||
1945 | 68.87 | a | 72.57 | 74.45 | 86.97 | 95.55 | 101.90 | 110.26 | 106.32 | 105.20 | 93.10 | 78.57 | 68.65 | 88.53 | ||||||||||||
1946 | 70.39 | 72.75 | 79.94 | 91.03 | 94.61 | 90.74 | g | 108.13 | a | 107.32 | 103.63 | 87.00 | 73.93 | 72.87 | 87.42 | a | ||||||||||
1947 | 68.94 | 79.07 | 80.90 | 87.43 | 98.26 | 102.57 | 111.74 | 107.81 | 106.67 | 93.33 | a | 75.63 | 70.19 | 90.21 | ||||||||||||
1948 | 74.83 | a | 73.86 | 74.71 | 89.07 | 97.46 | e | 102.97 | 107.45 | 106.97 | 102.17 | 89.68 | 80.13 | 66.42 | 88.81 | |||||||||||
1949 | 57.61 | 69.43 | 77.97 | 91.20 | 94.26 | 106.40 | 109.61 | 109.06 | 107.40 | 89.00 | 84.87 | 68.29 | 88.76 | |||||||||||||
1950 | 66.58 | 77.89 | 83.23 | 92.40 | 94.52 | 103.60 | 105.26 | 110.10 | 101.00 | 98.48 | b | 84.27 | 78.42 | 91.31 | ||||||||||||
1951 | 70.97 | 73.39 | 79.84 | 86.70 | 97.45 | 103.62 | a | 109.94 | 106.58 | 107.07 | 92.42 | 76.77 | 66.87 | a | 89.30 | |||||||||||
1952 | 66.19 | 73.14 | 73.97 | 87.30 | 102.03 | 101.77 | 109.71 | 109.19 | 106.60 | 100.61 | 74.63 | 68.84 | 89.50 | |||||||||||||
1953 | 75.90 | 73.96 | 81.19 | 85.59 | a | 89.32 | 104.20 | 109.94 | 107.74 | 106.27 | 92.16 | 80.70 | 70.48 | 89.79 | ||||||||||||
1954 | 70.23 | 81.21 | 76.94 | 93.63 | 98.35 | 102.40 | 109.55 | b | 106.68 | 105.43 | 94.71 | 83.10 | 70.48 | b | 91.06 | |||||||||||
1955 | 63.39 | 70.50 | 80.35 | 85.20 | 92.68 | 104.14 | b | 105.90 | 105.87 | 105.00 | a | 95.55 | 76.40 | 68.65 | 87.80 | |||||||||||
1956 | 70.03 | 68.14 | a | 80.65 | 84.43 | b | 96.90 | 106.93 | 107.81 | 107.87 | 108.60 | 90.48 | b | 79.70 | 72.48 | 89.50 | ||||||||||
1957 | 65.23 | 78.21 | 80.81 | 86.00 | 91.45 | 108.07 | 110.58 | 105.33 | a | 104.37 | 86.43 | a | 74.60 | 71.94 | 88.58 | |||||||||||
1958 | 72.61 | 75.04 | 73.52 | 85.83 | 100.00 | 103.37 | 108.17 | a | 106.57 | a | 104.21 | a | 94.29 | 78.47 | 75.97 | 89.84 | ||||||||||
1959 | 73.32 | 70.36 | 83.39 | 90.77 | 92.00 | 106.41 | a | 109.37 | a | 105.15 | d | 100.07 | b | 92.23 | 79.87 | 68.13 | 89.25 | |||||||||
1960 | 64.87 | 70.00 | 83.00 | 88.70 | 95.42 | 107.93 | 109.87 | 107.13 | 104.43 | 89.94 | 76.47 | 68.52 | 88.86 | |||||||||||||
1961 | 72.16 | 76.21 | 79.19 | 88.87 | 92.48 | 105.86 | a | 107.67 | d | 105.66 | b | 97.83 | 89.48 | 73.93 | 66.90 | 88.02 | ||||||||||
1962 | 69.71 | 71.29 | 74.13 | 92.87 | 90.65 | 103.03 | 107.87 | 110.35 | 102.87 | 92.03 | 81.87 | 71.71 | 89.03 | |||||||||||||
1963 | 66.35 | 81.07 | 78.55 | 82.07 | 96.39 | 99.37 | 107.71 | 104.94 | 103.03 | 92.13 | 78.57 | 71.16 | 88.44 | |||||||||||||
1964 | 66.90 | 71.48 | 77.35 | 84.67 | 93.16 | 101.77 | 107.29 | 105.38 | b | 100.60 | 95.52 | 73.73 | 70.06 | 87.33 | ||||||||||||
1965 | 70.84 | 74.25 | 76.29 | 84.30 | 92.67 | a | 97.66 | a | 107.45 | 107.26 | 98.20 | 96.84 | 78.73 | 67.39 | 87.66 | |||||||||||
1966 | 66.90 | 70.50 | 81.81 | 89.80 | 96.97 | 104.00 | 107.68 | 108.57 | a | 102.07 | 91.52 | 80.43 | 72.52 | 89.40 | ||||||||||||
1967 | 71.27 | a | 77.11 | 80.83 | a | 77.20 | 93.58 | 99.50 | 108.76 | b | 109.23 | a | 99.10 | 95.90 | 82.28 | a | 65.74 | 88.38 | ||||||||
1968 | 70.32 | 79.59 | b | 81.20 | a | 84.86 | a | 95.26 | 104.72 | a | 106.18 | c | 103.97 | a | 103.33 | 92.45 | 79.86 | a | 66.81 | 89.05 | ||||||
1969 | 71.75 | c | 70.22 | a | 78.24 | b | 86.37 | 98.19 | 100.10 | a | 108.35 | 111.47 | a | 104.62 | a | 88.13 | 78.00 | a | 70.42 | 88.82 | ||||||
1970 | 69.48 | 75.39 | 77.97 | 82.10 | 96.33 | a | 104.31 | a | 109.26 | 107.68 | 101.93 | a | 89.28 | b | 78.93 | 68.32 | 88.42 | |||||||||
1971 | 72.63 | a | 75.36 | 81.97 | 84.07 | a | 90.35 | 102.60 | 109.84 | 105.31 | b | 102.93 | 86.74 | 76.67 | 65.06 | 87.79 | ||||||||||
1972 | 69.03 | 78.45 | 88.84 | 87.77 | 96.35 | 104.03 | 111.06 | 104.80 | a | 100.17 | 84.62 | b | 74.57 | 67.83 | a | 88.96 | ||||||||||
1973 | 67.43 | a | 72.36 | 73.74 | 85.60 | 100.17 | a | 107.50 | 108.90 | 108.03 | 102.43 | 92.94 | 77.53 | 72.03 | a | 89.06 | ||||||||||
1974 | 68.97 | b | 74.70 | e | 81.48 | 86.77 | 96.35 | 108.87 | 105.97 | a | 107.39 | 103.30 | ----- | z | 78.83 | 67.45 | 89.10 | a | ||||||||
1975 | 70.90 | 74.07 | 77.26 | 78.03 | 93.39 | 102.80 | 107.35 | 108.94 | 103.90 | 89.90 | 80.00 | 72.32 | 88.24 | |||||||||||||
1976 | 72.52 | 74.32 | a | 77.26 | 83.47 | 96.58 | 104.57 | 106.71 | 105.32 | 94.17 | 90.87 | 80.97 | a | 72.03 | 88.23 | |||||||||||
1977 | 70.20 | a | 79.79 | 75.39 | 88.38 | a | 86.26 | 105.50 | 107.97 | 104.41 | b | 100.80 | 94.07 | a | 83.11 | c | 71.71 | 88.96 | ||||||||
1978 | 68.74 | 73.82 | 80.29 | 82.83 | 95.52 | 106.83 | a | 109.35 | 106.07 | a | 99.00 | 95.13 | 75.53 | 66.04 | d | 88.26 | ||||||||||
1979 | 63.26 | 71.85 | a | 77.90 | 86.71 | b | 92.84 | 104.58 | d | 106.96 | f | 103.29 | 105.41 | a | 93.16 | 76.83 | a | 73.73 | a | 86.32 | a | |||||
1980 | 70.83 | a | 74.69 | 76.13 | 85.31 | a | 89.29 | 104.50 | 109.03 | 105.65 | 102.77 | 93.26 | 81.36 | b | 75.97 | 89.06 | ||||||||||
1981 | 73.81 | 76.61 | 78.77 | 88.67 | 94.23 | 108.50 | 108.87 | 109.19 | 103.77 | 88.29 | 81.66 | a | 74.42 | 90.56 | ||||||||||||
1982 | 68.84 | f | 75.85 | b | 75.96 | d | 86.93 | a | 93.67 | d | 100.15 | d | 106.18 | c | 106.32 | c | 99.83 | f | 89.29 | c | 75.41 | h | 66.62 | b | 89.00 | c |
1983 | 72.34 | b | 73.42 | d | 77.38 | e | 80.65 | g | 94.96 | e | 101.08 | d | 107.04 | e | 102.96 | g | 102.57 | i | 91.15 | d | 77.93 | b | 71.18 | c | 85.16 | c |
1984 | 72.12 | g | 75.29 | e | 83.42 | g | 85.04 | d | 100.19 | e | 101.52 | e | 104.42 | l | 105.12 | f | 103.86 | h | 86.48 | h | 75.15 | c | 64.88 | f | 87.44 | g |
1985 | 67.35 | h | 70.96 | e | 77.08 | f | 91.17 | g | 95.43 | h | 107.04 | g | 108.84 | f | 106.50 | g | 93.54 | f | 88.24 | f | 74.82 | h | 70.96 | d | 70.96 | j |
1986 | 76.40 | f | 76.04 | b | 82.67 | g | 85.00 | g | 95.12 | g | 104.52 | c | 104.54 | g | 105.42 | g | 94.36 | e | 86.89 | d | 78.96 | g | 70.74 | d | 86.51 | g |
1987 | 70.67 | g | 74.45 | f | 77.04 | f | 91.52 | e | 93.62 | e | 104.39 | b | 105.12 | e | 105.58 | g | 101.77 | h | 93.64 | i | 76.80 | e | 65.81 | j | 94.29 | g |
1988 | 69.71 | g | 76.04 | e | 82.16 | f | 84.09 | g | 93.16 | f | 100.72 | e | 105.58 | e | 104.04 | e | 100.60 | e | 95.68 | f | 78.09 | g | 70.20 | f | 97.40 | g |
1989 | 67.00 | f | 74.68 | c | 85.17 | g | 93.19 | d | 94.96 | d | 102.79 | b | 108.04 | c | 103.57 | c | 101.46 | b | 90.96 | e | 80.54 | d | 72.35 | e | 92.25 | b |
1990 | 69.88 | f | 71.58 | b | 81.57 | h | 86.92 | d | 92.17 | h | 104.75 | j | 106.71 | g | 102.78 | d | 100.12 | d | 92.21 | g | 79.36 | e | 66.08 | e | 84.47 | f |
1991 | 69.25 | g | 79.95 | g | 72.88 | f | 85.84 | e | 90.74 | h | 97.62 | f | 103.50 | g | 103.90 | b | 100.77 | d | 94.39 | c | 77.77 | d | 67.35 | e | 88.34 | f |
1992 | 69.34 | b | 74.59 | 75.69 | e | 89.46 | b | 94.67 | a | 100.96 | f | 105.92 | f | 106.21 | c | 104.27 | d | 92.73 | e | 74.77 | d | 64.04 | e | 84.58 | b | |
1993 | 65.83 | g | 69.38 | b | 82.04 | e | 89.12 | d | 94.35 | e | 103.62 | d | 104.27 | a | 104.08 | f | 101.11 | c | 91.64 | f | 75.92 | e | 70.25 | c | 87.78 | c |
1994 | 73.69 | e | 70.35 | e | 81.22 | d | 86.12 | f | 92.48 | f | 106.36 | e | 108.08 | f | 108.16 | 103.23 | 89.65 | 71.60 | 67.19 | 85.72 | c | |||||
1995 | 66.90 | 79.33 | g | 79.00 | a | 84.20 | 89.65 | h | 100.55 | a | 107.48 | 107.80 | a | 104.38 | d | 94.67 | a | 85.42 | d | 72.80 | a | 90.32 | b | |||
1996 | 73.71 | 76.59 | 82.54 | g | 90.33 | f | 97.85 | d | 104.10 | 108.28 | f | 106.85 | e | 99.29 | b | 91.96 | e | 79.63 | c | 71.86 | c | 89.09 | c | |||
1997 | 71.59 | d | 74.65 | e | 85.92 | g | 85.58 | d | 100.73 | a | 99.92 | d | 105.93 | c | 106.19 | e | 100.65 | d | 88.87 | h | 79.70 | c | 67.00 | c | 89.20 | b |
1998 | 71.54 | c | 69.42 | d | 77.83 | g | 81.96 | e | 87.23 | e | 99.67 | f | 108.24 | f | 107.85 | e | 100.70 | g | 89.40 | f | 78.12 | d | 70.67 | d | 80.97 | e |
1999 | 73.45 | b | 75.68 | c | 78.60 | f | 81.21 | k | 93.00 | i | 100.58 | d | ----- | z | 105.33 | d | 101.96 | f | 97.36 | c | 83.65 | d | 72.42 | e | 86.92 | e |
2000 | 73.35 | e | 74.30 | f | 79.20 | f | 90.71 | f | 98.43 | h | 103.96 | e | 106.56 | d | 106.04 | d | 101.80 | e | 86.56 | f | 73.04 | d | 73.31 | b | 91.15 | e |
2001 | 67.58 | e | 70.22 | e | 80.46 | c | 83.93 | c | 101.16 | f | 104.58 | d | 106.36 | f | 107.04 | h | 104.21 | b | 94.38 | g | 81.42 | d | 67.74 | d | 82.52 | d |
2002 | 70.56 | d | 76.19 | b | 78.43 | h | 87.29 | i | 94.04 | d | 105.88 | e | 107.72 | f | 106.74 | d | 102.88 | e | 89.64 | i | 81.73 | d | 70.54 | e | 88.57 | d |
2003 | 78.39 | c | 70.70 | e | 80.44 | d | 82.04 | e | 94.32 | c | 102.44 | e | 108.52 | d | 105.75 | g | 104.15 | c | 99.22 | h | 74.92 | e | 71.67 | d | 86.76 | b |
2004 | 71.61 | c | 70.52 | d | 88.11 | d | 88.39 | g | 96.07 | d | 102.20 | e | 106.86 | c | 105.89 | c | 101.57 | g | 88.50 | e | 73.79 | f | 70.29 | c | 88.89 | c |
2005 | 69.96 | g | 71.13 | e | 79.24 | f | 86.23 | h | 93.97 | a | 101.52 | g | 108.50 | e | 105.57 | c | 100.93 | c | 89.85 | e | 81.32 | e | 73.07 | d | 90.54 | d |
2006 | 72.44 | d | 77.33 | g | 73.65 | e | 83.75 | f | 97.84 | f | 106.08 | e | 108.12 | e | 106.11 | c | 100.15 | c | 88.80 | k | 81.67 | c | 70.80 | f | 92.60 | e |
2007 | 67.80 | a | 75.46 | d | 83.92 | f | 85.47 | 95.82 | c | 104.16 | e | 107.00 | e | 108.12 | e | 99.52 | i | 90.40 | f | 82.55 | a | 65.81 | 88.02 | c | ||
2008 | 67.32 | c | 73.38 | 81.26 | 86.70 | 90.65 | 105.50 | 105.90 | 104.65 | 103.03 | 93.30 | a | 82.68 | b | 68.42 | 88.57 | ||||||||||
2009 | 74.13 | 73.46 | 80.61 | 84.24 | a | 98.68 | 97.60 | 110.19 | 107.23 | 104.80 | 88.26 | 81.03 | 67.68 | 88.99 | ||||||||||||
2010 | 70.32 | c | 72.11 | 77.42 | 80.87 | 90.07 | a | 102.63 | 108.61 | 107.00 | 105.10 | 88.47 | a | 77.31 | d | 72.65 | 87.71 | |||||||||
2011 | 72.06 | 70.11 | 80.53 | a | 87.10 | 88.74 | 101.73 | 106.53 | a | 109.65 | 103.87 | 93.32 | 76.93 | a | 67.00 | 88.13 | ||||||||||
2012 | 74.50 | a | 74.36 | a | 78.65 | 86.63 | 97.97 | 104.76 | a | 106.13 | 106.26 | 103.34 | a | 93.13 | 82.57 | 71.45 | 89.98 | |||||||||
2013 | 66.70 | a | 72.81 | a | 84.94 | 88.57 | 95.29 | 104.96 | f | 106.41 | i | 105.35 | 100.97 | 88.87 | 79.07 | b | 71.00 | 85.36 | b | |||||||
2014 | 77.90 | b | 78.71 | 83.84 | 87.97 | a | 94.52 | b | 104.57 | 106.45 | 103.57 | a | 102.80 | 93.55 | b | 80.45 | a | 69.87 | 90.35 | |||||||
2015 | 71.47 | a | 80.37 | a | 85.13 | a | 86.35 | d | 87.81 | 104.38 | a | 103.93 | a | 109.53 | n | 101.42 | f | 93.80 | a | 76.45 | a | 68.06 | 85.77 | b | ||
2016 | 69.16 | 80.83 | 83.00 | b | 85.69 | a | 88.70 | a | 103.79 | f | 107.14 | b | 106.97 | b | 99.79 | p | 93.33 | s | 81.20 | e | 67.83 | g | 87.84 | d | ||
2017 | 64.41 | d | 72.65 | k | 82.75 | k | 89.64 | e | 94.48 | d | 105.11 | b | 107.00 | d | 107.68 | c | 98.13 | 94.77 | a | 83.28 | a | 74.22 | d | 91.87 | b | |
2018 | 75.60 | a | 73.91 | e | 77.87 | 91.30 | 91.78 | h | 103.23 | h | 106.93 | a | 106.43 | c | 104.96 | e | 87.10 | a | 81.56 | l | 69.13 | 88.14 | c | |||
2019 | 67.81 | e | 65.81 | a | 78.37 | a | 88.63 | 85.87 | 101.14 | a | 106.88 | f | 108.31 | b | 99.90 | a | 90.03 | 80.14 | a | 65.52 | f | 86.60 | b | |||
2020 | 72.58 | 74.22 | b | 73.87 | 86.38 | a | 98.26 | 102.43 | b | 109.33 | a | 110.93 | b | 106.13 | 97.23 | a | 80.97 | a | 71.55 | b | 90.32 | |||||
2021 | 70.97 | 76.15 | a | 76.53 | a | 89.93 | a | 95.77 | 107.04 | c | 107.74 | 107.67 | a | 102.93 | a | 88.52 | 85.52 | a | 71.97 | a | 90.06 | |||||
2022 | 73.15 | e | 74.48 | a | 82.65 | 88.87 | 96.52 | b | 105.17 | a | 107.72 | b | 106.45 | 102.07 | b | 92.50 | e | 74.07 | c | 69.33 | a | 89.42 | ||||
2023 | 67.93 | a | 68.64 | 75.40 | a | 89.85 | d | 94.93 | c | 100.00 | 112.06 | 107.40 | a | 101.38 | a | 93.93 | b | 80.37 | 73.97 | a | 88.82 | |||||
2024 | 70.37 | a | 72.81 | b | 77.05 | i | 86.60 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.59 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 70.15 | 73.79 | 79.60 | 86.92 | 94.81 | 103.62 | 108.20 | 106.89 | 102.72 | 91.98 | 79.19 | 70.38 | 89.23 | |||||||||||||
S.D. | 3.59 | 3.34 | 3.64 | 3.36 | 3.55 | 2.60 | 1.91 | 1.97 | 2.77 | 3.24 | 3.20 | 2.95 | 1.17 | |||||||||||||
SKEW | -0.65 | 0.16 | 0.61 | -0.23 | -0.41 | -0.14 | 0.19 | 0.40 | -0.63 | 0.08 | -0.21 | 0.21 | 1.01 | |||||||||||||
MAX | 78.39 | 81.21 | 91.74 | 93.63 | 102.03 | 109.20 | 112.77 | 112.29 | 108.60 | 100.61 | 85.52 | 78.42 | 93.21 | |||||||||||||
MIN | 57.61 | 65.81 | 73.52 | 77.20 | 85.87 | 97.40 | 103.93 | 102.78 | 94.17 | 84.62 | 71.60 | 64.04 | 87.33 | |||||||||||||
YRS | 81 | 86 | 75 | 80 | 80 | 81 | 77 | 83 | 81 | 76 | 86 | 86 | 55 |