YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 108.29 | 107.81 | 103.27 | 89.06 | 73.10 | 63.61 | 90.86 | f | ||||||
1949 | 53.74 | 66.79 | 76.48 | 89.90 | a | 92.48 | 103.43 | 107.87 | 107.00 | 104.87 | 86.84 | 83.23 | 65.52 | 86.51 | ||||||||||||
1950 | 64.23 | 76.07 | 81.16 | 90.97 | 93.94 | 103.07 | 104.58 | 109.16 | 99.20 | 95.74 | 81.90 | 74.94 | 89.58 | |||||||||||||
1951 | 67.45 | 71.11 | 77.97 | 84.53 | 94.97 | 102.00 | 109.58 | 103.65 | e | 104.27 | 88.77 | 73.47 | 63.26 | 86.75 | ||||||||||||
1952 | 63.06 | 70.55 | 71.29 | 84.47 | 99.52 | 100.90 | 107.58 | 107.65 | 103.47 | 97.52 | 71.43 | 65.45 | 86.91 | |||||||||||||
1953 | 73.23 | 71.61 | 79.90 | 84.37 | 87.42 | 102.80 | 107.39 | 106.13 | 104.43 | 89.94 | 78.67 | 67.52 | 87.78 | |||||||||||||
1954 | 66.65 | 79.39 | 74.97 | 91.67 | 96.94 | 101.07 | 107.87 | 104.16 | 102.83 | 92.77 | 81.13 | 67.03 | 88.87 | |||||||||||||
1955 | 61.06 | 66.82 | 78.71 | 83.60 | 92.29 | 102.97 | 104.68 | 103.65 | 103.20 | 94.77 | 76.63 | 70.23 | 86.55 | |||||||||||||
1956 | 70.77 | 67.83 | 81.35 | 84.87 | 95.29 | 105.27 | 105.97 | 105.81 | 105.77 | 87.87 | 75.90 | 70.32 | 88.08 | |||||||||||||
1957 | 64.03 | 77.04 | 79.26 | 84.57 | 89.90 | 106.07 | 109.16 | 103.65 | 102.53 | 83.87 | 71.13 | 69.19 | 86.70 | |||||||||||||
1958 | 69.32 | 73.11 | a | 72.03 | 85.50 | 99.68 | 104.03 | 109.26 | 106.45 | 101.53 | 92.23 | 75.83 | 73.74 | 88.56 | ||||||||||||
1959 | 70.45 | 68.93 | 82.26 | 91.43 | 93.00 | 106.80 | 109.65 | 104.26 | 99.13 | 91.00 | 77.13 | 65.90 | 88.33 | |||||||||||||
1960 | 62.65 | 68.55 | 83.35 | 89.53 | 96.42 | 109.70 | 111.16 | 107.58 | 102.57 | 88.06 | 74.50 | 66.90 | 88.42 | |||||||||||||
1961 | 70.74 | 74.61 | 78.03 | 88.70 | 92.84 | 107.50 | 108.26 | 105.32 | 97.83 | 89.65 | 73.17 | 66.19 | 87.74 | |||||||||||||
1962 | 68.45 | 70.29 | 74.65 | 93.93 | 90.94 | 102.97 | 107.84 | 110.77 | 103.00 | 91.29 | 80.40 | 69.71 | 88.69 | |||||||||||||
1963 | 62.84 | 78.82 | 77.74 | 81.30 | 96.68 | 99.40 | 109.03 | 104.58 | 102.10 | 90.42 | 74.37 | 67.68 | 87.08 | |||||||||||||
1964 | 62.87 | 67.59 | 74.81 | 83.73 | 92.84 | 102.33 | 108.35 | 106.13 | 100.83 | 94.87 | 71.60 | 66.26 | 86.02 | |||||||||||||
1965 | 67.58 | 71.68 | 74.00 | 83.77 | 92.42 | 98.63 | 108.74 | 108.61 | 98.20 | 96.03 | 76.17 | 63.29 | 86.59 | |||||||||||||
1966 | 62.90 | 66.71 | 80.23 | 90.87 | 98.97 | 104.90 | 108.90 | 108.39 | 101.97 | 89.10 | 76.60 | 68.03 | 88.13 | |||||||||||||
1967 | 67.55 | 75.29 | 79.26 | 77.47 | 94.29 | 100.73 | 109.26 | 108.16 | 98.37 | 93.10 | 79.23 | 61.55 | 87.02 | |||||||||||||
1968 | 66.45 | 76.10 | 79.06 | 84.83 | 94.87 | 104.30 | 106.19 | 102.61 | 102.27 | 89.55 | 76.60 | 61.61 | 87.04 | |||||||||||||
1969 | 66.81 | 66.79 | 76.48 | 87.37 | 98.45 | 100.63 | 108.26 | 111.26 | 102.93 | 84.68 | 75.07 | 67.68 | 87.20 | |||||||||||||
1970 | 64.97 | 74.14 | 75.77 | 80.77 | 97.23 | 104.73 | 110.03 | 106.94 | 97.80 | 84.52 | 74.37 | 61.68 | 86.08 | |||||||||||||
1971 | 64.77 | 71.00 | 80.55 | 83.67 | 87.71 | 103.87 | 110.06 | 102.77 | 98.90 | 79.84 | 69.40 | 58.55 | 84.26 | |||||||||||||
1972 | 61.97 | 72.59 | 84.35 | 86.40 | 95.81 | 106.43 | 111.74 | 106.35 | 101.47 | 82.65 | 71.63 | 63.65 | 87.09 | |||||||||||||
1973 | 63.84 | 68.89 | 71.16 | 84.67 | 98.61 | 107.07 | 109.65 | 107.32 | 101.40 | 91.23 | 74.50 | 69.55 | 87.32 | |||||||||||||
1974 | 64.10 | 71.86 | 79.10 | 86.80 | 95.84 | 109.63 | 106.90 | 107.45 | 102.13 | 88.87 | 76.00 | 62.94 | 87.63 | |||||||||||||
1975 | 66.61 | 69.46 | 73.23 | 75.30 | 91.81 | 102.17 | 107.13 | 107.68 | 100.63 | 86.81 | 75.03 | 67.90 | 85.31 | |||||||||||||
1976 | 70.16 | 71.03 | 75.06 | 80.77 | 95.23 | 103.57 | 104.23 | 103.90 | 91.37 | 84.58 | 77.77 | 68.00 | 85.47 | |||||||||||||
1977 | 66.39 | 77.57 | 73.42 | 88.63 | 86.61 | 105.93 | 108.84 | 104.39 | 99.63 | 91.84 | 78.63 | 69.35 | 87.60 | |||||||||||||
1978 | 63.61 | 69.79 | 79.29 | 82.70 | 94.19 | 108.07 | 109.48 | 106.00 | 97.20 | 91.90 | 70.20 | 58.52 | 85.91 | |||||||||||||
1979 | 56.06 | 69.68 | 74.97 | 86.40 | 93.74 | 105.83 | 108.65 | 103.19 | 104.77 | 90.35 | 71.30 | 68.42 | 86.11 | |||||||||||||
1980 | 68.74 | 73.07 | 74.81 | 85.57 | 89.74 | 106.43 | 112.71 | 109.03 | 103.40 | 92.55 | 80.13 | 75.68 | 89.32 | |||||||||||||
1981 | 74.23 | 77.29 | 79.26 | 92.73 | 96.35 | 111.10 | 111.10 | 109.65 | 101.40 | ----- | z | ----- | z | 70.97 | 92.41 | b | ||||||||||
1982 | 67.52 | 74.21 | 76.00 | 85.90 | 94.90 | 101.57 | 107.13 | 105.84 | 99.20 | 87.06 | 72.70 | 63.39 | 86.28 | |||||||||||||
1983 | 69.39 | 71.61 | 75.87 | 81.33 | 96.94 | 102.97 | 109.03 | 104.48 | 102.87 | 90.23 | 76.33 | 68.06 | 87.43 | |||||||||||||
1984 | 69.42 | 72.76 | 82.48 | 85.97 | 102.32 | 102.21 | a | 105.26 | 104.87 | 102.97 | 85.06 | 74.10 | 61.97 | 87.45 | ||||||||||||
1985 | 64.68 | 70.36 | 77.23 | 91.80 | 97.61 | 109.00 | 110.65 | 109.19 | 95.20 | 87.74 | 72.27 | 67.19 | 87.74 | |||||||||||||
1986 | 73.45 | 75.32 | 84.71 | 87.33 | 97.87 | 107.97 | 106.39 | 108.29 | 94.80 | 87.39 | 76.80 | 67.00 | 88.94 | |||||||||||||
1987 | 65.74 | 72.96 | 77.74 | 94.00 | 96.26 | 108.00 | 107.58 | 107.58 | 103.90 | 94.35 | 74.97 | 63.73 | a | 88.90 | ||||||||||||
1988 | 66.35 | 75.90 | 82.06 | 84.97 | 94.52 | 104.30 | 108.00 | 104.81 | 100.13 | 94.23 | 75.93 | 66.42 | 88.13 | |||||||||||||
1989 | 63.61 | 70.86 | 83.39 | 93.70 | 95.29 | 104.90 | 109.87 | 103.81 | 101.50 | 88.55 | 78.17 | 68.65 | 88.52 | |||||||||||||
1990 | 65.48 | 69.68 | 79.84 | 87.53 | 92.32 | 105.97 | 107.13 | 103.97 | 100.00 | 90.23 | 75.60 | ----- | z | 88.89 | a | |||||||||||
1991 | ----- | z | 77.21 | 69.39 | 83.93 | 90.97 | 99.47 | 105.35 | 105.06 | 100.67 | 93.39 | 76.33 | 66.81 | 88.05 | a | |||||||||||
1992 | 66.94 | 73.21 | 74.55 | 91.23 | 96.84 | 102.87 | 106.68 | 106.39 | 103.83 | 91.45 | 73.10 | 60.61 | 87.31 | |||||||||||||
1993 | 63.42 | 67.68 | 81.23 | 90.33 | 97.03 | 104.63 | 106.65 | 106.35 | 103.07 | 90.35 | 72.57 | 68.55 | 87.65 | |||||||||||||
1994 | 71.39 | 69.14 | 80.68 | 88.23 | 93.06 | 109.47 | 109.45 | 109.39 | 103.57 | 87.61 | 69.30 | 64.87 | 88.01 | |||||||||||||
1995 | 64.74 | 76.50 | 77.68 | 84.93 | ----- | z | 101.57 | 109.97 | 110.35 | 104.80 | 92.65 | 82.93 | 70.23 | 88.76 | a | |||||||||||
1996 | 70.68 | 76.17 | 81.42 | 90.53 | 98.03 | 106.93 | 109.68 | 108.58 | 98.80 | 89.32 | 77.87 | 69.32 | 89.78 | |||||||||||||
1997 | 68.71 | 73.71 | 87.32 | 86.93 | 103.03 | 102.57 | 108.10 | 109.42 | 102.47 | 88.68 | 77.83 | 64.68 | 89.45 | |||||||||||||
1998 | 68.94 | 67.07 | 76.10 | 82.57 | 89.61 | 100.07 | 110.48 | 109.94 | 100.60 | 89.00 | 76.70 | 67.77 | 86.57 | |||||||||||||
1999 | 71.87 | 74.36 | 79.42 | 80.37 | 94.74 | 103.00 | 105.52 | 107.39 | 102.17 | 95.35 | 81.97 | 69.97 | 88.84 | |||||||||||||
2000 | 72.00 | 74.07 | 79.13 | 92.30 | 100.45 | 106.27 | 109.42 | 106.48 | 102.20 | 85.77 | 71.00 | b | 70.65 | 89.14 | ||||||||||||
2001 | 64.52 | 68.57 | 80.06 | 84.67 | 102.32 | 106.17 | 107.16 | 107.50 | c | 105.13 | 92.42 | 78.63 | 64.97 | 88.51 | ||||||||||||
2002 | 67.06 | 74.46 | 77.26 | 88.50 | 95.00 | 107.63 | 109.16 | 107.90 | 101.97 | 87.23 | 78.73 | 66.71 | 88.47 | |||||||||||||
2003 | 75.35 | 69.93 | 79.23 | 82.30 | 96.42 | 104.20 | 109.48 | 106.13 | 104.10 | 96.29 | 71.90 | 67.58 | 88.58 | |||||||||||||
2004 | 69.16 | 68.10 | 87.39 | 86.77 | 97.58 | 103.80 | 108.32 | 105.87 | 100.17 | 84.90 | 69.80 | 66.10 | 87.33 | |||||||||||||
2005 | 66.61 | 67.29 | 77.13 | 85.50 | 96.71 | 102.87 | 110.97 | 105.35 | 100.27 | 88.71 | 78.10 | 68.71 | 87.35 | |||||||||||||
2006 | 70.19 | 75.57 | 73.00 | 84.93 | 99.10 | 108.10 | 109.68 | 106.90 | 99.03 | 86.87 | 79.17 | 66.74 | 88.27 | |||||||||||||
2007 | 64.77 | 73.86 | 82.87 | 87.53 | 96.90 | 105.83 | 107.87 | 108.48 | 99.47 | 89.29 | 80.47 | 62.65 | 88.33 | |||||||||||||
2008 | 63.42 | 71.83 | 81.10 | 88.27 | 91.94 | 107.80 | 108.00 | 106.77 | 103.53 | 92.10 | 80.40 | 64.52 | 88.31 | |||||||||||||
2009 | 71.32 | 71.25 | 80.23 | 85.73 | 101.29 | 99.60 | 111.06 | 108.58 | 104.03 | 86.94 | 78.47 | 64.48 | 88.58 | |||||||||||||
2010 | 67.55 | 70.32 | 76.16 | 82.63 | 91.52 | 104.60 | 109.45 | 107.58 | 104.43 | 87.71 | 75.43 | 68.23 | 87.13 | |||||||||||||
2011 | 68.61 | 67.50 | 80.42 | 86.70 | 91.84 | 104.38 | a | 107.13 | 110.84 | 103.10 | 91.68 | 73.63 | 63.35 | 87.43 | ||||||||||||
2012 | 71.29 | 73.52 | 79.48 | 88.67 | 99.19 | 106.47 | 104.55 | 106.06 | 102.07 | 90.94 | 79.77 | 66.61 | 89.05 | |||||||||||||
2013 | 64.74 | 69.96 | 84.48 | 89.47 | 96.45 | 108.17 | 107.06 | 105.55 | 99.70 | 86.23 | 76.53 | 66.83 | b | 87.93 | ||||||||||||
2014 | 73.68 | 77.25 | 82.68 | 88.47 | 96.68 | 105.87 | 108.50 | e | 104.70 | d | 101.47 | 92.58 | 77.93 | 66.35 | 89.68 | |||||||||||
2015 | 69.55 | 79.25 | 85.06 | 87.13 | 89.29 | 106.93 | 105.29 | 109.58 | 102.73 | 91.23 | 73.93 | 65.29 | 88.77 | |||||||||||||
2016 | 66.48 | 80.00 | 84.06 | 87.07 | 92.35 | 108.23 | 110.68 | 107.45 | 98.63 | 92.94 | 79.53 | 66.13 | 89.46 | |||||||||||||
2017 | 64.61 | 73.29 | 84.52 | 90.07 | 94.55 | 108.37 | 109.45 | 108.32 | 98.57 | 92.84 | 80.40 | 71.10 | 89.67 | |||||||||||||
2018 | 73.52 | 72.75 | 79.26 | 91.73 | 95.81 | 105.83 | 109.45 | 108.52 | d | 105.59 | c | 86.24 | b | 76.77 | 65.39 | 89.24 | ||||||||||
2019 | 65.87 | 65.25 | 78.10 | 89.47 | 88.87 | 104.13 | 109.10 | 110.52 | 100.33 | 88.19 | 77.93 | 63.19 | 86.75 | |||||||||||||
2020 | 69.00 | 73.45 | 73.81 | 86.60 | 99.90 | 104.67 | 111.81 | 112.68 | 106.33 | 95.23 | 79.23 | 68.52 | 90.10 | |||||||||||||
2021 | 68.39 | 73.68 | 77.10 | 91.30 | 96.94 | 109.67 | 108.77 | 107.79 | b | 103.17 | 87.19 | 83.17 | 68.32 | 89.62 | ||||||||||||
2022 | 70.16 | 73.57 | 82.13 | 90.13 | 97.53 | a | 107.40 | 109.29 | 105.42 | 102.23 | 89.97 | 71.83 | 66.03 | 88.81 | ||||||||||||
2023 | 64.94 | 68.89 | 73.81 | 89.30 | 94.55 | 100.27 | 113.65 | 109.10 | 99.72 | a | 92.39 | 77.87 | 69.90 | 87.86 | ||||||||||||
2024 | 66.29 | 70.97 | 76.03 | 86.71 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.10 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 67.06 | 72.18 | 78.63 | 86.78 | 95.16 | 104.79 | 108.51 | 106.94 | 101.49 | 89.88 | 76.16 | 66.64 | 87.83 | |||||||||||||
S.D. | 3.87 | 3.52 | 3.85 | 3.79 | 3.57 | 2.88 | 1.92 | 2.21 | 2.67 | 3.48 | 3.46 | 3.28 | 1.21 | |||||||||||||
SKEW | -0.47 | 0.21 | 0.01 | -0.34 | -0.18 | -0.08 | -0.10 | 0.13 | -0.97 | -0.16 | -0.02 | 0.03 | -0.38 | |||||||||||||
MAX | 75.35 | 80.00 | 87.39 | 94.00 | 103.03 | 111.10 | 113.65 | 112.68 | 106.33 | 97.52 | 83.23 | 75.68 | 90.10 | |||||||||||||
MIN | 53.74 | 65.25 | 69.39 | 75.30 | 86.61 | 98.63 | 104.23 | 102.61 | 91.37 | 79.84 | 69.30 | 58.52 | 84.26 | |||||||||||||
YRS | 75 | 76 | 76 | 75 | 74 | 75 | 76 | 76 | 76 | 75 | 75 | 75 | 71 |