YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | 97.37 | l | 102.20 | 105.13 | 108.97 | 98.93 | 96.45 | 84.33 | 78.58 | 96.37 | e | |||||||
1951 | 71.61 | 73.82 | 80.13 | 85.80 | 95.52 | 101.60 | 108.10 | 104.97 | 105.27 | 91.61 | 77.37 | 67.13 | 88.58 | |||||||||||||
1952 | 65.06 | 72.28 | 72.48 | 84.70 | 99.87 | 99.93 | 108.35 | 108.19 | 104.20 | 99.32 | 74.80 | 68.45 | 88.14 | |||||||||||||
1953 | 76.03 | 75.68 | 80.61 | 84.00 | 87.81 | 100.57 | 107.77 | 106.19 | 104.83 | 92.03 | 81.10 | 72.42 | 89.09 | |||||||||||||
1954 | 70.19 | 83.00 | 75.97 | 92.03 | 95.45 | 99.93 | 106.61 | 103.45 | 101.57 | 93.29 | 83.27 | 72.39 | 89.76 | |||||||||||||
1955 | 64.06 | 70.93 | 80.19 | 84.43 | 90.84 | 101.33 | 103.32 | 103.55 | 102.13 | 94.52 | 78.63 | 71.81 | 87.15 | |||||||||||||
1956 | 73.77 | 69.55 | 82.42 | 84.90 | 93.39 | 103.80 | 105.45 | 104.87 | 106.60 | 88.81 | 81.80 | 74.19 | 89.13 | |||||||||||||
1957 | 65.94 | 78.64 | 80.10 | 85.87 | 89.81 | 105.50 | 109.94 | 104.26 | 102.93 | 85.35 | 75.27 | 73.52 | 88.09 | |||||||||||||
1958 | 73.90 | 73.86 | 72.16 | 86.23 | 98.81 | 103.07 | 107.71 | 106.19 | 103.80 | 95.16 | 79.87 | 78.03 | 89.90 | |||||||||||||
1959 | 73.48 | 71.50 | 84.58 | 91.47 | 91.55 | 105.90 | 108.71 | 103.97 | 98.33 | 92.35 | 81.83 | 69.97 | 89.47 | |||||||||||||
1960 | 65.65 | 70.24 | 83.97 | 88.93 | 94.58 | 107.07 | 108.90 | 106.03 | 103.40 | 90.58 | 78.17 | 71.58 | 89.09 | |||||||||||||
1961 | 75.26 | 78.18 | 79.13 | 89.97 | 92.03 | 105.70 | 106.13 | 105.32 | 98.27 | 89.35 | 75.20 | 70.26 | 88.73 | |||||||||||||
1962 | 71.10 | 71.61 | 75.42 | 93.67 | 90.65 | 101.60 | 106.68 | 109.10 | 102.33 | 91.71 | 82.57 | 73.90 | 89.19 | |||||||||||||
1963 | 66.87 | 82.29 | 78.29 | 82.13 | 94.65 | 98.13 | 106.29 | 103.87 | 101.93 | 91.13 | 78.07 | 74.32 | 88.16 | |||||||||||||
1964 | 68.55 | 72.62 | 76.77 | 84.07 | 92.06 | 100.10 | 106.87 | 105.00 | 100.30 | 94.97 | 74.97 | 69.81 | 87.17 | |||||||||||||
1965 | 71.74 | 75.71 | 76.39 | 84.30 | 91.74 | 95.50 | 106.74 | 105.58 | 96.57 | 96.03 | 77.47 | 67.52 | 87.11 | |||||||||||||
1966 | 68.03 | 70.57 | 81.81 | 90.43 | 96.26 | 101.93 | 106.35 | 106.06 | 101.53 | 91.39 | 79.73 | 72.90 | 88.92 | |||||||||||||
1967 | 71.65 | 78.18 | 79.13 | 76.57 | 93.29 | 98.33 | 107.06 | 107.61 | 98.67 | 93.87 | 81.50 | 66.71 | 87.71 | |||||||||||||
1968 | 71.42 | 80.07 | 81.13 | 86.03 | 94.39 | 102.87 | 104.90 | 101.81 | 101.17 | 90.61 | 80.23 | 67.35 | 88.50 | |||||||||||||
1969 | 70.35 | 70.14 | 79.19 | 86.70 | 96.06 | 97.97 | 106.94 | 110.29 | 103.30 | 87.23 | 78.97 | 71.71 | 88.24 | |||||||||||||
1970 | 69.97 | 77.18 | 79.68 | 82.47 | 95.94 | 102.20 | 108.10 | 106.97 | 101.00 | 88.39 | 79.13 | 68.71 | 88.31 | |||||||||||||
1971 | 72.58 | 75.68 | 81.58 | 84.17 | 88.48 | 100.07 | 106.97 | 102.84 | 100.40 | 84.19 | 76.20 | 63.55 | 86.39 | |||||||||||||
1972 | 68.71 | 77.97 | 89.10 | 87.67 | 93.94 | 100.57 | 108.29 | 102.16 | 97.50 | 82.23 | 73.40 | 67.26 | 87.40 | |||||||||||||
1973 | 66.19 | 70.57 | 73.00 | 84.73 | 96.68 | 104.93 | 106.77 | 105.23 | 99.63 | 91.45 | 76.33 | 72.52 | 87.34 | |||||||||||||
1974 | 66.97 | 73.61 | 78.19 | 86.17 | 92.97 | 106.77 | 104.42 | 105.48 | 101.60 | 89.42 | 79.13 | 67.55 | 87.69 | |||||||||||||
1975 | 71.13 | 71.68 | 75.10 | 76.50 | 92.16 | 99.80 | 105.58 | 106.68 | 101.50 | 87.55 | 78.80 | 72.26 | 86.56 | |||||||||||||
1976 | 74.74 | 73.10 | 77.65 | 81.97 | 93.68 | 102.73 | 103.71 | 102.77 | 92.10 | 89.13 | 80.87 | 71.13 | 86.96 | |||||||||||||
1977 | 69.19 | 79.36 | 74.55 | 88.13 | 84.81 | 103.23 | 106.65 | 102.52 | 98.13 | 91.61 | 81.30 | 71.13 | 87.55 | |||||||||||||
1978 | 67.03 | 72.07 | 79.42 | 81.47 | 93.97 | 105.53 | 107.29 | 104.26 | 97.93 | 93.45 | 74.53 | 65.39 | 86.86 | |||||||||||||
1979 | 61.65 | 71.61 | 76.42 | 86.97 | 91.87 | 103.60 | 105.52 | 101.03 | 104.10 | 91.39 | 78.37 | 74.61 | 87.26 | |||||||||||||
1980 | 70.74 | 75.41 | 75.45 | 85.13 | 87.10 | 102.27 | 108.19 | 104.06 | 101.10 | 91.81 | 80.70 | 77.48 | 88.29 | |||||||||||||
1981 | 73.71 | 77.86 | 77.81 | 88.10 | 91.74 | 106.47 | 106.39 | 107.13 | 101.27 | 86.84 | 80.60 | 74.58 | 89.37 | |||||||||||||
1982 | 68.83 | a | 75.93 | 75.97 | 86.77 | 93.03 | 98.77 | 104.94 | 104.61 | 97.53 | 90.10 | 74.93 | 68.00 | 86.62 | ||||||||||||
1983 | 73.71 | 72.93 | 77.16 | 80.73 | 95.90 | 100.20 | 107.06 | 101.39 | 100.03 | 91.13 | 77.50 | 71.97 | 87.48 | |||||||||||||
1984 | 74.32 | 77.52 | 83.13 | 86.03 | 100.87 | 102.13 | 104.45 | 104.16 | 103.17 | 86.84 | 77.47 | 66.03 | 88.84 | |||||||||||||
1985 | 68.97 | 73.64 | 79.03 | 91.80 | 95.77 | 106.00 | b | 107.84 | 107.23 | 94.97 | 89.35 | 74.60 | 72.74 | 88.50 | ||||||||||||
1986 | 77.61 | 77.18 | 84.32 | 87.37 | 95.29 | 105.40 | 104.90 | 105.52 | 95.67 | 88.55 | 80.33 | 72.19 | 89.53 | |||||||||||||
1987 | 69.65 | 74.57 | 78.52 | 93.43 | 93.63 | a | 104.63 | 104.71 | 104.90 | 101.63 | 92.39 | 77.33 | 65.97 | 88.45 | ||||||||||||
1988 | 70.26 | 77.72 | 84.26 | 85.40 | 95.03 | 100.93 | 105.94 | 105.00 | 101.53 | 96.03 | 79.27 | 70.39 | 89.31 | |||||||||||||
1989 | 69.06 | 74.89 | 85.58 | 94.10 | 95.48 | 104.27 | 108.48 | ----- | z | 102.10 | ----- | z | 82.03 | ----- | z | 90.67 | c | |||||||||
1990 | ----- | z | 72.79 | 82.42 | 89.13 | 93.71 | 105.50 | 106.97 | 103.29 | 100.97 | 91.94 | 80.67 | 68.32 | 90.52 | a | |||||||||||
1991 | 69.39 | 81.75 | 72.77 | 86.47 | 91.61 | 98.37 | 104.29 | 104.32 | 100.87 | 94.52 | 79.33 | 69.52 | 87.77 | |||||||||||||
1992 | 72.45 | 76.17 | 76.97 | 90.63 | 94.94 | 100.60 | 104.74 | 104.68 | 102.07 | 92.55 | 78.07 | 65.81 | 88.31 | |||||||||||||
1993 | 65.58 | 72.29 | 85.29 | 91.47 | 95.71 | 103.83 | 103.39 | 103.84 | 101.83 | 92.45 | 77.10 | 72.90 | 88.81 | |||||||||||||
1994 | 75.55 | 71.79 | 83.68 | 89.33 | 93.03 | 106.67 | 107.65 | 107.32 | 101.67 | 88.71 | 70.40 | 66.55 | 88.53 | |||||||||||||
1995 | 66.94 | 80.43 | 80.19 | 86.50 | 89.55 | 101.27 | 109.35 | 109.87 | 104.90 | 94.35 | 85.47 | 74.52 | 90.28 | |||||||||||||
1996 | 74.68 | 77.72 | 84.35 | 92.23 | 98.48 | 105.27 | 108.58 | 107.77 | 99.73 | 91.19 | 80.53 | 71.94 | 91.04 | |||||||||||||
1997 | 71.68 | 76.75 | 88.19 | 88.33 | 101.45 | 101.77 | 106.00 | 107.71 | 101.93 | 89.16 | 80.23 | 68.74 | 90.16 | |||||||||||||
1998 | 72.10 | 69.68 | 79.26 | 84.37 | 88.58 | 99.50 | 109.48 | 108.90 | 101.00 | 90.55 | 79.70 | 71.94 | 87.92 | |||||||||||||
1999 | 75.61 | 76.89 | 79.90 | 82.20 | 95.06 | 101.93 | 107.29 | 107.10 | 102.90 | 98.65 | 84.93 | 74.19 | 90.56 | |||||||||||||
2000 | 75.77 | 76.14 | 81.45 | 93.70 | 100.39 | 105.97 | 109.10 | 105.52 | 101.03 | 85.58 | 73.37 | 73.42 | 90.12 | |||||||||||||
2001 | 66.87 | 68.57 | 80.74 | 84.00 | 100.61 | 104.73 | 105.58 | 106.35 | 103.80 | 92.42 | 80.57 | 67.90 | a | 88.51 | ||||||||||||
2002 | 69.42 | 76.93 | 78.10 | 86.30 | 93.84 | 105.03 | 106.94 | 104.77 | 103.23 | 88.32 | 81.80 | 69.55 | 88.69 | |||||||||||||
2003 | 79.77 | 71.86 | 81.26 | 82.40 | 95.16 | 101.93 | 108.68 | 106.32 | 104.33 | 97.03 | a | 72.63 | 69.32 | 89.23 | ||||||||||||
2004 | 70.84 | 70.04 | a | 88.77 | 87.53 | 96.48 | 101.41 | a | 106.77 | 105.35 | 99.97 | 86.29 | 72.07 | 68.87 | 87.87 | |||||||||||
2005 | 67.94 | 69.21 | 78.90 | 85.37 | 95.29 | 100.67 | 108.23 | 105.03 | a | 100.34 | a | 89.55 | 80.60 | 72.45 | 87.80 | |||||||||||
2006 | 72.52 | 77.29 | 73.71 | 83.53 | 97.03 | 106.30 | 109.32 | 105.71 | 100.43 | 88.39 | 81.96 | e | 70.29 | 88.87 | ||||||||||||
2007 | 67.52 | 75.14 | 85.10 | 87.33 | 96.42 | 104.07 | 106.42 | 106.84 | 100.20 | 90.65 | 82.60 | 65.06 | 88.95 | |||||||||||||
2008 | 67.03 | 74.41 | 83.77 | 89.47 | 92.87 | 107.93 | 107.35 | 105.55 | 104.37 | 93.61 | 83.27 | 67.19 | 89.74 | |||||||||||||
2009 | 75.10 | 72.89 | 81.77 | 86.50 | 100.06 | 98.13 | 110.03 | 106.65 | 103.23 | 87.84 | 79.97 | 66.74 | 89.08 | |||||||||||||
2010 | 68.77 | 72.32 | 77.52 | 82.00 | 90.90 | 101.30 | 106.74 | 105.45 | 103.13 | 87.35 | 76.50 | 71.03 | 86.92 | |||||||||||||
2011 | 71.03 | 69.14 | 80.97 | 86.17 | 89.97 | 101.47 | 105.68 | 108.81 | 102.03 | 93.07 | a | 74.80 | 67.52 | 87.55 | ||||||||||||
2012 | 75.39 | 75.71 | a | 80.45 | 89.30 | 99.39 | 105.27 | 105.61 | 107.32 | 103.90 | 92.94 | 80.83 | 69.71 | 90.49 | ||||||||||||
2013 | 68.77 | 73.50 | 86.71 | 90.23 | 96.58 | 106.13 | 106.35 | 105.03 | 101.07 | 87.06 | 78.50 | 71.26 | 89.27 | |||||||||||||
2014 | 77.42 | 78.64 | 84.94 | 89.63 | 97.39 | 106.00 | a | 108.58 | 104.23 | 102.70 | 94.10 | 79.53 | 69.48 | 91.05 | ||||||||||||
2015 | 73.61 | 82.29 | 87.48 | 88.30 | 89.58 | 105.17 | 104.48 | 109.03 | 102.30 | 93.58 | 75.97 | 68.90 | 90.06 | |||||||||||||
2016 | 69.03 | 83.21 | 85.26 | 88.63 | 92.84 | 107.00 | 108.97 | 107.55 | 99.43 | 92.84 | 81.63 | 69.10 | 90.46 | |||||||||||||
2017 | 67.13 | 74.32 | 87.19 | 91.17 | 95.48 | 107.20 | 108.90 | 108.58 | 98.70 | 94.16 | 82.90 | 74.55 | 90.86 | |||||||||||||
2018 | 78.00 | 77.75 | 82.97 | 94.53 | 97.26 | 107.03 | 111.58 | 110.06 | 107.23 | 91.13 | 81.93 | 71.52 | 92.58 | |||||||||||||
2019 | 70.71 | 68.07 | 81.52 | 92.80 | 91.27 | a | 105.33 | 110.52 | 111.65 | 101.50 | 90.87 | 80.67 | 66.87 | 89.31 | ||||||||||||
2020 | 72.55 | 76.03 | 75.13 | 87.00 | 99.94 | 103.53 | 110.87 | 111.61 | 107.00 | 97.03 | 82.00 | a | 71.71 | 91.20 | ||||||||||||
2021 | 72.52 | 77.07 | 79.06 | 92.70 | 96.90 | 108.33 | 108.84 | 107.87 | 102.63 | 88.03 | 85.17 | 69.81 | 90.74 | |||||||||||||
2022 | 73.58 | 76.57 | 83.61 | 90.63 | 96.00 | 106.13 | 107.77 | 106.61 | 100.63 | 91.35 | 74.03 | 67.74 | 89.56 | |||||||||||||
2023 | 67.13 | 70.25 | 74.26 | 89.83 | 92.77 | 98.63 | 111.97 | 108.28 | f | 98.55 | a | 92.58 | 78.77 | 71.90 | 86.06 | a | ||||||||||
2024 | 66.74 | h | 72.25 | a | 76.07 | a | 87.05 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.16 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 70.86 | 74.80 | 80.21 | 87.14 | 94.30 | 103.01 | 107.12 | 105.92 | 101.33 | 91.20 | 79.01 | 70.44 | 88.76 | |||||||||||||
S.D. | 3.65 | 3.68 | 4.13 | 3.85 | 3.45 | 2.92 | 1.89 | 2.29 | 2.67 | 3.33 | 3.25 | 3.13 | 1.29 | |||||||||||||
SKEW | 0.08 | 0.30 | 0.12 | -0.27 | -0.14 | -0.23 | 0.22 | 0.31 | -0.57 | -0.04 | -0.38 | 0.27 | 0.39 | |||||||||||||
MAX | 79.77 | 83.21 | 89.10 | 94.53 | 101.45 | 108.33 | 111.97 | 111.65 | 107.23 | 99.32 | 85.47 | 78.58 | 92.58 | |||||||||||||
MIN | 61.65 | 68.07 | 72.16 | 76.50 | 84.81 | 95.50 | 103.32 | 101.03 | 92.10 | 82.23 | 70.40 | 63.55 | 86.39 | |||||||||||||
YRS | 72 | 74 | 74 | 73 | 73 | 74 | 74 | 72 | 74 | 73 | 74 | 73 | 70 |