YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1940 | ----- | z | ----- | z | ----- | z | ----- | z | 99.52 | 107.10 | 109.16 | 108.32 | ----- | z | ----- | z | 69.10 | 62.48 | 92.61 | f | ||||||
1941 | 61.00 | 69.07 | 72.58 | 76.37 | 93.13 | 99.63 | 107.27 | a | 102.19 | 95.17 | 79.84 | 72.83 | 62.52 | 82.63 | ||||||||||||
1942 | 63.84 | 65.04 | 74.58 | 83.20 | 93.42 | ----- | z | 110.57 | a | 105.81 | 100.57 | 86.94 | 75.00 | 67.10 | 84.19 | a | ||||||||||
1943 | 63.52 | 71.21 | 77.71 | 88.93 | 99.42 | 102.30 | 110.00 | 104.77 | 103.53 | 88.97 | 74.20 | 63.87 | 87.37 | |||||||||||||
1944 | 61.81 | 62.97 | 71.03 | 79.90 | 91.97 | 97.67 | 107.19 | 108.45 | 101.00 | 89.61 | 68.47 | 63.81 | 83.66 | |||||||||||||
1945 | 63.94 | 67.21 | 68.97 | 82.33 | 91.97 | 99.87 | 107.26 | 104.26 | 100.20 | 87.06 | 72.23 | 60.52 | 83.82 | |||||||||||||
1946 | 62.32 | 68.61 | 75.03 | 88.57 | 92.77 | 104.57 | 106.42 | 105.03 | 100.17 | 80.42 | 66.00 | 64.87 | 84.56 | |||||||||||||
1947 | 62.13 | 73.43 | 78.52 | 85.23 | 97.84 | 100.60 | 109.00 | 103.68 | 103.77 | 87.42 | 67.63 | 60.39 | 85.80 | |||||||||||||
1948 | 66.03 | 65.83 | 69.94 | 84.87 | 93.32 | 101.37 | 107.84 | 107.42 | 101.90 | 87.16 | 68.59 | c | 59.74 | 84.50 | ||||||||||||
1949 | 48.42 | 61.89 | 73.90 | 87.80 | 90.84 | 102.10 | 108.39 | 106.03 | 103.57 | 84.61 | 80.20 | 61.94 | 84.14 | |||||||||||||
1950 | 60.23 | 72.21 | 77.81 | 89.20 | 93.52 | 102.73 | 105.39 | 108.23 | 97.73 | 93.48 | 77.73 | 70.81 | 87.42 | |||||||||||||
1951 | 62.97 | 67.57 | 74.97 | 82.97 | 92.81 | 101.93 | 109.26 | 102.77 | 101.97 | 85.19 | 69.37 | 58.29 | 84.17 | |||||||||||||
1952 | 58.61 | 66.93 | 67.26 | 82.47 | 97.13 | 100.50 | 107.35 | 107.87 | 101.43 | 94.90 | 67.93 | 62.48 | 84.57 | |||||||||||||
1953 | 69.32 | 68.18 | 76.97 | 82.70 | 85.29 | 101.77 | 107.90 | 104.68 | 103.23 | 86.42 | 74.23 | 62.68 | 85.28 | |||||||||||||
1954 | 63.23 | 75.75 | 71.55 | 89.87 | 96.35 | 100.43 | 108.45 | 104.32 | 102.60 | 90.19 | 76.87 | 62.65 | 86.85 | |||||||||||||
1955 | 56.94 | 63.07 | 75.45 | 80.33 | 89.74 | 101.60 | 104.19 | 102.35 | 101.70 | 91.68 | 73.40 | 67.10 | 83.96 | |||||||||||||
1956 | 67.65 | 65.52 | 78.90 | 83.37 | 94.13 | 104.80 | 105.77 | 105.74 | 105.13 | 86.13 | 72.40 | 66.00 | 86.29 | |||||||||||||
1957 | 60.42 | 73.82 | 76.90 | 82.80 | 89.61 | 105.87 | 107.81 | 101.42 | 100.23 | 80.39 | 65.53 | 64.61 | 84.12 | |||||||||||||
1958 | 64.55 | 69.18 | 68.48 | 82.07 | 98.90 | 103.90 | 109.26 | 108.13 | 100.33 | 90.42 | 73.23 | 70.19 | 86.55 | |||||||||||||
1959 | 65.52 | 66.29 | 78.87 | 89.57 | 91.71 | 107.07 | 111.39 | 104.00 | 97.83 | 88.58 | 72.93 | 62.39 | 86.34 | |||||||||||||
1960 | 58.23 | 62.83 | 79.81 | 86.70 | 94.94 | 108.67 | 110.97 | 107.55 | 100.90 | 86.35 | 71.77 | 63.29 | 86.00 | |||||||||||||
1961 | 66.26 | 71.04 | 75.94 | 86.40 | 91.71 | 107.43 | 109.55 | 105.13 | 96.67 | 85.84 | 68.47 | 61.74 | 85.51 | |||||||||||||
1962 | 63.84 | 68.43 | 71.19 | 91.60 | 90.19 | 102.67 | 108.39 | 109.58 | 102.17 | 88.84 | 77.97 | 66.58 | 86.79 | |||||||||||||
1963 | 61.23 | 75.39 | 75.58 | 79.80 | 96.10 | 98.43 | 109.65 | 105.19 | 101.30 | 89.71 | 73.43 | 64.84 | 85.89 | |||||||||||||
1964 | 61.55 | 65.79 | 72.65 | 81.10 | 90.94 | 100.97 | 107.90 | 105.58 | 99.37 | 93.84 | 68.63 | 63.77 | 84.34 | |||||||||||||
1965 | 65.45 | 68.89 | 71.87 | 78.83 | 88.45 | 96.50 | 107.00 | 107.10 | 94.70 | 92.32 | 72.17 | 60.10 | 83.62 | |||||||||||||
1966 | 59.94 | 63.43 | 77.94 | 87.93 | 97.39 | 103.63 | 108.13 | 108.19 | 101.37 | 86.52 | 74.43 | 63.77 | 86.06 | |||||||||||||
1967 | 64.97 | 72.21 | 77.81 | 75.50 | 93.45 | 100.63 | 109.29 | 109.55 | 98.57 | 91.29 | 77.03 | 59.10 | 85.78 | |||||||||||||
1968 | 65.16 | 75.03 | 78.42 | 83.13 | 95.90 | 106.67 | 108.13 | 103.06 | 101.13 | 88.71 | 73.97 | 59.97 | 86.61 | |||||||||||||
1969 | 65.68 | 65.64 | 74.26 | 85.13 | 97.13 | 100.73 | 108.26 | 110.71 | 101.53 | 83.00 | 73.57 | 66.65 | 86.02 | |||||||||||||
1970 | 63.16 | 72.96 | 74.03 | 79.47 | 96.06 | 104.57 | 110.10 | 107.16 | 97.93 | 84.03 | 74.47 | 61.06 | 85.42 | |||||||||||||
1971 | 65.35 | 70.36 | 78.26 | 83.27 | 87.16 | 102.63 | 110.74 | 103.84 | 98.57 | 81.35 | 70.90 | 58.68 | 84.26 | |||||||||||||
1972 | 62.52 | 74.28 | 86.68 | 85.83 | 94.87 | 103.47 | 111.97 | 104.71 | 97.87 | 80.29 | 68.30 | 60.10 | 85.91 | |||||||||||||
1973 | 59.74 | 65.71 | 67.32 | 81.40 | 96.94 | 105.33 | 109.90 | 105.68 | 99.00 | 88.29 | 71.60 | 65.32 | 84.69 | |||||||||||||
1974 | 58.48 | 67.86 | 77.00 | 83.27 | 94.55 | 108.40 | 105.58 | 105.81 | 101.33 | 87.23 | 72.70 | 60.26 | 85.21 | |||||||||||||
1975 | 63.26 | 67.14 | 71.32 | 75.40 | 91.39 | 101.77 | 108.35 | 107.48 | 100.93 | 85.77 | 72.63 | 66.29 | 84.31 | |||||||||||||
1976 | 67.68 | 70.83 | 73.55 | 80.67 | 95.52 | 102.70 | 106.61 | 105.10 | 93.30 | 83.39 | 74.17 | 64.29 | 84.82 | |||||||||||||
1977 | 62.23 | 74.32 | 70.87 | 87.53 | 85.48 | 105.70 | 108.94 | 105.74 | 99.40 | 90.42 | s | 77.73 | 68.26 | 86.02 | a | |||||||||||
1978 | 62.55 | 68.46 | 76.53 | a | 82.20 | 94.61 | 106.93 | 110.81 | 107.94 | 99.40 | 93.52 | 71.27 | 58.94 | 86.10 | ||||||||||||
1979 | 55.84 | 66.96 | 73.90 | 85.93 | 94.52 | b | 104.70 | 109.23 | 103.58 | 105.93 | 91.71 | 72.43 | b | 67.89 | c | 86.05 | ||||||||||
1980 | 64.87 | a | 71.62 | 73.00 | 84.97 | 86.58 | 103.03 | a | 109.97 | a | 106.44 | f | 100.50 | 89.00 | b | 76.60 | 71.97 | 84.74 | a | |||||||
1981 | 69.10 | 72.75 | 75.48 | 89.50 | 92.56 | d | 107.07 | 109.03 | 108.52 | 100.07 | 83.03 | 77.90 | a | 67.76 | b | 87.73 | ||||||||||
1982 | 63.63 | a | 70.96 | 73.55 | 83.86 | a | 91.94 | 100.27 | 104.97 | b | 104.16 | f | 97.66 | a | 82.81 | 69.33 | 61.11 | c | 81.83 | a | ||||||
1983 | 65.97 | a | 68.50 | 74.16 | 78.55 | a | 92.53 | a | 100.90 | 106.42 | 101.55 | b | 100.47 | 86.19 | 74.67 | c | 65.97 | b | 84.66 | |||||||
1984 | 66.61 | 71.24 | 80.48 | 84.93 | b | 99.94 | 101.57 | 105.26 | 103.94 | 101.47 | 82.52 | 72.33 | 60.10 | 85.86 | ||||||||||||
1985 | 62.00 | 67.61 | 75.19 | 89.90 | 95.71 | 106.37 | 109.68 | 108.48 | 93.53 | 86.68 | 70.23 | 66.00 | 85.95 | |||||||||||||
1986 | 71.61 | 73.43 | 82.52 | 85.87 | 95.32 | 106.52 | c | 105.54 | c | 107.59 | b | 93.32 | k | 83.16 | l | 75.09 | h | 63.18 | i | 91.05 | d | |||||
1987 | 62.05 | j | 71.00 | h | 73.50 | i | 88.25 | j | 93.13 | h | 106.57 | i | 106.65 | k | 107.30 | k | 100.89 | b | 92.21 | b | 71.47 | 61.19 | j | 88.19 | i | |
1988 | 62.87 | 72.48 | 80.03 | 82.27 | 92.87 | 103.53 | 110.23 | 104.23 | 98.90 | 95.03 | 75.23 | 65.32 | 86.92 | |||||||||||||
1989 | 62.58 | 71.11 | 84.68 | 93.23 | 95.55 | 104.40 | 111.10 | 105.29 | 101.43 | 88.61 | 77.30 | 67.58 | 88.57 | |||||||||||||
1990 | 64.13 | 68.68 | 80.61 | 86.77 | 91.81 | 105.20 | 107.42 | 104.71 | 100.53 | 89.90 | 75.87 | 60.90 | 86.38 | |||||||||||||
1991 | 63.19 | 76.39 | 70.74 | 82.83 | 92.16 | 100.23 | 108.74 | 107.52 | 100.93 | 93.32 | 75.13 | 63.45 | 86.22 | |||||||||||||
1992 | 64.03 | 71.52 | 74.65 | 89.80 | 96.55 | 103.43 | 107.00 | 107.77 | 103.60 | 91.55 | 70.57 | 59.10 | 86.63 | |||||||||||||
1993 | 61.71 | 66.43 | 78.97 | 88.33 | 97.32 | 103.70 | 106.32 | 107.42 | 102.33 | 89.74 | 71.13 | 65.71 | 86.59 | |||||||||||||
1994 | 69.42 | 66.29 | 81.97 | 87.33 | 93.68 | 109.30 | 110.35 | 111.00 | 103.23 | 87.10 | 67.40 | 64.13 | 87.60 | |||||||||||||
1995 | 63.03 | 75.46 | 75.29 | 83.83 | 90.03 | 102.03 | 110.42 | 110.55 | 104.13 | 92.03 | 81.13 | 67.55 | 87.96 | |||||||||||||
1996 | 69.55 | 74.86 | 81.00 | 90.13 | 97.97 | 106.93 | 111.48 | 109.74 | 98.90 | 88.42 | 75.00 | 66.00 | 89.17 | |||||||||||||
1997 | 65.55 | 71.14 | 85.16 | 84.67 | 101.23 | 102.40 | 108.19 | 108.23 | 101.03 | 87.87 | 75.20 | 62.39 | 87.75 | |||||||||||||
1998 | 66.74 | 64.93 | 76.16 | 80.60 | 89.61 | 100.80 | 111.77 | 110.74 | 99.33 | 86.74 | 74.10 | 65.87 | 85.62 | |||||||||||||
1999 | 69.55 | 73.50 | 80.48 | 80.23 | 94.87 | 104.03 | 106.03 | 107.48 | 102.13 | 93.55 | 79.37 | 68.26 | 88.29 | |||||||||||||
2000 | 69.93 | a | 73.38 | 77.06 | 92.93 | 102.03 | 107.67 | 110.29 | 108.03 | 102.70 | 86.71 | 68.60 | 68.42 | 88.98 | ||||||||||||
2001 | 61.03 | 65.11 | 77.06 | 82.47 | 101.61 | 106.54 | b | 108.39 | 108.90 | 105.10 | 91.10 | 76.37 | 61.39 | 87.09 | ||||||||||||
2002 | 63.58 | 72.25 | 75.35 | 88.00 | 94.84 | 107.50 | 111.10 | 108.48 | 101.97 | 85.42 | 74.73 | 64.45 | 87.31 | |||||||||||||
2003 | 72.16 | 66.89 | 75.90 | 80.67 | 96.19 | 104.93 | 111.10 | 106.71 | 103.77 | 94.61 | 68.07 | 63.90 | 87.08 | |||||||||||||
2004 | 65.03 | 64.97 | 85.74 | 84.57 | 96.68 | 104.60 | 109.00 | 105.52 | 100.90 | 86.03 | 69.43 | 65.06 | 86.46 | |||||||||||||
2005 | 65.55 | 67.86 | 77.00 | 85.97 | 98.97 | 105.27 | 114.32 | 108.16 | 102.27 | 88.84 | 77.13 | 67.35 | 88.22 | |||||||||||||
2006 | 69.06 | 74.93 | 73.81 | 86.73 | 101.39 | 111.00 | 112.77 | 109.32 | 99.17 | 85.29 | c | 75.80 | 64.00 | 88.61 | ||||||||||||
2007 | 62.00 | 71.89 | 82.68 | 87.63 | 97.42 | 106.97 | 110.65 | 109.00 | 100.20 | 87.58 | 78.27 | 60.06 | 87.86 | |||||||||||||
2008 | 60.84 | 68.76 | 78.71 | 86.67 | 91.71 | 107.90 | 109.65 | 107.58 | 103.10 | 90.29 | 76.83 | 60.77 | 86.90 | |||||||||||||
2009 | 67.32 | 67.50 | 77.65 | 84.80 | 101.74 | 100.23 | 111.77 | 108.48 | 103.67 | 84.84 | 76.33 | 60.35 | 87.06 | |||||||||||||
2010 | 64.68 | 68.43 | 73.81 | 81.60 | 90.06 | 104.80 | 110.97 | 107.97 | 104.93 | 86.39 | 72.63 | 65.77 | 86.00 | |||||||||||||
2011 | 65.42 | 66.14 | 78.68 | 85.27 | 91.03 | 104.37 | 108.10 | 111.45 | 102.83 | 90.32 | 72.13 | 61.81 | 86.46 | |||||||||||||
2012 | 69.19 | 71.97 | 79.39 | 88.27 | 99.55 | 108.00 | 107.06 | 109.32 | 103.97 | 90.10 | 78.10 | 64.35 | 89.11 | |||||||||||||
2013 | 62.29 | 68.50 | 83.48 | 89.07 | 96.84 | 110.17 | 109.06 | 106.58 | 98.53 | 85.39 | 74.97 | 64.42 | 87.44 | |||||||||||||
2014 | 71.77 | 77.07 | 82.00 | 88.77 | 97.71 | 107.83 | 109.71 | 104.13 | 102.13 | 92.61 | 77.13 | 64.32 | 89.60 | |||||||||||||
2015 | 68.42 | 78.39 | 84.84 | 87.13 | 91.03 | 109.00 | 107.16 | 110.81 | 104.43 | 90.71 | 72.00 | 63.55 | 88.96 | |||||||||||||
2016 | 64.16 | 77.90 | 83.61 | 85.83 | 93.45 | 111.14 | a | 112.19 | 108.26 | 100.43 | 91.27 | p | 79.17 | 64.74 | 89.17 | a | ||||||||||
2017 | 63.65 | 73.00 | 85.03 | 89.77 | 96.45 | 111.83 | 112.23 | 110.29 | 99.73 | 92.00 | 80.20 | 69.84 | 90.33 | |||||||||||||
2018 | 71.87 | 72.11 | 78.77 | 92.80 | 97.84 | 108.69 | a | 112.52 | 111.39 | 107.50 | 86.97 | 76.03 | 65.03 | 90.13 | ||||||||||||
2019 | 64.26 | 63.43 | 76.74 | 89.40 | 89.65 | 105.73 | 111.32 | 112.35 | 100.93 | 87.23 | a | 76.03 | 60.77 | 86.49 | ||||||||||||
2020 | 66.97 | 70.79 | 73.35 | 86.57 | 99.71 | 105.30 | 112.77 | 113.68 | 106.57 | 93.39 | 75.73 | 66.03 | 89.24 | |||||||||||||
2021 | 67.04 | c | 72.29 | 76.45 | 90.77 | 97.65 | 110.70 | 110.58 | 108.90 | a | 102.80 | 86.00 | f | 80.64 | e | 65.48 | 89.39 | a | ||||||||
2022 | 67.13 | 71.36 | 80.45 | 89.17 | 96.83 | a | 107.80 | 109.74 | 106.81 | 102.60 | 89.42 | 68.60 | 64.07 | a | 87.83 | |||||||||||
2023 | 61.81 | 66.18 | 70.03 | 87.40 | 94.52 | 100.20 | 114.81 | 107.84 | 99.40 | 90.48 | 75.07 | 68.13 | 86.32 | |||||||||||||
2024 | 64.90 | 69.17 | 75.03 | 85.65 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 69.70 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 64.24 | 69.77 | 76.64 | 85.16 | 94.50 | 104.37 | 109.11 | 107.02 | 101.03 | 88.14 | 73.56 | 64.01 | 86.41 | |||||||||||||
S.D. | 3.85 | 3.86 | 4.39 | 3.97 | 3.79 | 3.35 | 2.18 | 2.59 | 2.66 | 3.67 | 3.66 | 3.08 | 1.67 | |||||||||||||
SKEW | -0.63 | 0.10 | 0.16 | -0.25 | -0.16 | 0.09 | 0.09 | -0.00 | -0.44 | -0.23 | -0.10 | 0.20 | 0.18 | |||||||||||||
MAX | 72.16 | 78.39 | 86.68 | 93.23 | 102.03 | 111.83 | 114.81 | 113.68 | 107.50 | 95.03 | 81.13 | 71.97 | 90.33 | |||||||||||||
MIN | 48.42 | 61.89 | 67.26 | 75.40 | 85.29 | 96.50 | 104.19 | 101.42 | 93.30 | 79.84 | 65.53 | 58.29 | 82.63 | |||||||||||||
YRS | 83 | 83 | 83 | 82 | 83 | 82 | 83 | 81 | 82 | 79 | 83 | 82 | 75 |