YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1978 | ----- | z | ----- | z | ----- | z | ----- | z | 81.88 | n | 93.27 | 99.48 | 97.29 | 86.40 | 82.90 | 60.13 | 50.19 | 81.38 | e | |||||||
1979 | 45.16 | 54.89 | 62.77 | 72.77 | 83.58 | 93.73 | 99.32 | 93.61 | 94.97 | 80.65 | 62.53 | 59.48 | 75.29 | |||||||||||||
1980 | 56.42 | 60.90 | 60.00 | 72.37 | 75.71 | 90.80 | 99.87 | 97.03 | 90.37 | 79.61 | 68.00 | 64.19 | 76.27 | |||||||||||||
1981 | 59.90 | 62.14 | 62.61 | 77.47 | 81.35 | 97.23 | 100.74 | 99.61 | 90.37 | 72.19 | 66.77 | 58.65 | 77.42 | |||||||||||||
1982 | 52.87 | 59.14 | 59.32 | 70.00 | 80.16 | 87.93 | 95.58 | 93.45 | 84.00 | 72.16 | 58.07 | 52.81 | 72.12 | |||||||||||||
1983 | 56.19 | 57.64 | 61.45 | 63.57 | 81.00 | 90.80 | 96.10 | 90.23 | 89.20 | 76.84 | 61.27 | 55.03 | 73.28 | |||||||||||||
1984 | 57.65 | 60.34 | 66.90 | 70.97 | 89.84 | 90.90 | 95.90 | 92.97 | 90.10 | 70.00 | a | 60.40 | 47.26 | 74.44 | ||||||||||||
1985 | 52.00 | 57.07 | 62.39 | 78.43 | 84.29 | 97.73 | 100.42 | 98.77 | 82.87 | 76.32 | 57.10 | 58.42 | 75.48 | |||||||||||||
1986 | 62.29 | 61.93 | 70.26 | 72.73 | 85.32 | 96.37 | 95.00 | 98.52 | 81.60 | 73.65 | 64.60 | 54.97 | 76.44 | |||||||||||||
1987 | 52.06 | 57.46 | 62.26 | 77.80 | 81.48 | 94.40 | 94.35 | 97.10 | 90.53 | 80.42 | 60.80 | 48.29 | 74.75 | |||||||||||||
1988 | 51.74 | 62.66 | 66.26 | 71.83 | 81.55 | 93.27 | 101.74 | 96.13 | 88.63 | 85.87 | 63.73 | 54.32 | 76.48 | |||||||||||||
1989 | 53.03 | 56.96 | 70.06 | 81.23 | 82.58 | 92.87 | 101.61 | 94.74 | 89.10 | 76.16 | 68.70 | 60.06 | 77.26 | |||||||||||||
1990 | 54.39 | 57.04 | 68.71 | 76.97 | 80.94 | 94.33 | 98.48 | 95.13 | 90.07 | 79.84 | 65.63 | 50.39 | 75.99 | |||||||||||||
1991 | 54.45 | 67.14 | 58.26 | 70.83 | 76.87 | 88.77 | 98.77 | 96.10 | 90.27 | 81.39 | 64.40 | 55.48 | 75.23 | |||||||||||||
1992 | 54.90 | 59.72 | 62.26 | 78.30 | 86.19 | 90.90 | 95.77 | 98.03 | 92.23 | 80.03 | 61.17 | 49.13 | 75.72 | |||||||||||||
1993 | 50.13 | 53.25 | 68.42 | 74.13 | 83.97 | 90.20 | 96.77 | 96.58 | 90.93 | 77.58 | 61.23 | 56.06 | 74.94 | |||||||||||||
1994 | 60.42 | 56.04 | 72.13 | 75.50 | 84.06 | 99.73 | 102.81 | 101.19 | d | 91.63 | 76.45 | 56.53 | 56.61 | 77.76 | ||||||||||||
1995 | 52.35 | 69.36 | 64.06 | 71.47 | 76.29 | 87.43 | 99.00 | 98.68 | 92.50 | 82.00 | q | ----- | z | 58.74 | 76.99 | b | ||||||||||
1996 | 57.68 | 61.41 | 69.94 | 78.93 | 86.39 | 98.03 | 104.26 | 102.45 | 90.17 | 76.94 | 64.63 | 56.52 | 78.95 | |||||||||||||
1997 | 54.42 | 61.29 | 75.16 | 74.40 | 90.58 | 90.93 | 96.39 | 97.90 | 87.30 | 74.81 | 63.40 | 52.61 | 76.60 | |||||||||||||
1998 | 55.68 | 52.75 | 62.55 | 66.77 | 73.23 | 85.27 | 99.48 | 98.74 | 85.70 | 73.81 | 63.80 | 57.68 | 72.95 | |||||||||||||
1999 | 60.58 | 60.96 | 68.19 | 66.50 | 81.81 | 92.50 | 95.81 | 96.23 | 89.50 | 82.29 | 69.57 | 58.32 | 76.85 | |||||||||||||
2000 | 57.90 | 58.72 | 65.48 | 78.73 | 88.71 | 97.20 | 100.39 | 97.74 | 90.67 | 74.77 | 59.17 | 59.23 | 77.39 | |||||||||||||
2001 | 53.00 | 54.57 | 68.74 | 71.30 | 91.29 | 96.47 | 98.16 | 101.68 | 94.07 | 82.13 | 65.17 | 52.77 | 77.45 | |||||||||||||
2002 | 54.61 | 62.93 | 64.61 | 77.07 | 84.32 | 97.20 | 103.32 | 99.23 | 91.20 | 75.68 | 65.90 | 54.45 | 77.54 | |||||||||||||
2003 | 64.45 | 57.21 | 66.84 | 68.00 | 85.55 | 97.03 | 104.53 | a | 97.74 | 94.30 | 85.58 | 57.63 | 53.32 | 77.68 | ||||||||||||
2004 | 55.48 | 53.17 | 74.61 | 74.77 | 85.68 | 96.00 | 100.68 | 96.74 | 88.53 | 72.77 | 59.67 | 55.19 | 76.11 | |||||||||||||
2005 | 55.84 | 56.68 | 65.42 | 71.16 | e | 84.39 | 91.10 | 103.42 | 97.29 | 87.97 | 76.61 | 67.03 | 57.06 | 76.16 | ||||||||||||
2006 | 57.48 | 63.07 | 59.48 | 72.50 | 87.87 | 98.03 | 102.77 | 98.48 | 89.77 | 74.80 | a | 66.53 | 55.55 | 77.20 | ||||||||||||
2007 | 54.45 | 61.86 | 73.19 | 77.47 | 87.32 | 96.67 | 103.39 | 95.00 | 84.57 | 75.77 | 67.97 | 49.90 | 77.30 | |||||||||||||
2008 | 50.61 | 60.17 | 68.64 | c | 74.87 | 81.00 | 95.87 | 100.90 | 100.77 | 92.60 | 79.45 | 68.33 | 51.55 | 77.06 | ||||||||||||
2009 | 59.87 | 57.07 | 66.52 | 73.97 | 90.13 | 89.13 | 102.55 | 97.84 | 94.23 | 74.84 | 67.07 | 51.39 | 77.05 | |||||||||||||
2010 | 55.00 | 57.50 | 64.29 | 69.97 | 77.52 | 94.53 | 102.26 | 97.60 | a | 94.72 | a | 75.94 | 61.97 | 55.35 | 75.55 | |||||||||||
2011 | 57.06 | 56.82 | 66.03 | 72.23 | 77.16 | 91.73 | 98.03 | 100.68 | 92.63 | 79.71 | 60.97 | 55.26 | 75.69 | |||||||||||||
2012 | 59.81 | 60.17 | 67.68 | 75.90 | 87.58 | 95.87 | 98.23 | 100.10 | 93.73 | 79.00 | 68.20 | 53.68 | 78.33 | |||||||||||||
2013 | 53.97 | 59.25 | 71.71 | 78.03 | 84.77 | 98.67 | 101.90 | 97.32 | 88.73 | 74.26 | 64.33 | 56.10 | 77.42 | |||||||||||||
2014 | 63.45 | 64.29 | 69.61 | 76.57 | 85.39 | 96.77 | 101.55 | 94.61 | 91.93 | 82.90 | 67.10 | 54.45 | 79.05 | |||||||||||||
2015 | 60.90 | 68.61 | 74.10 | 75.70 | 80.97 | 98.70 | 95.84 | 99.90 | 94.17 | 77.71 | 60.27 | 52.74 | 78.30 | |||||||||||||
2016 | 53.97 | 66.21 | 69.32 | 75.07 | 80.28 | f | 100.00 | 102.10 | 99.42 | 89.97 | 79.03 | 66.87 | 54.03 | 77.82 | a | |||||||||||
2017 | 52.94 | 60.54 | 72.81 | 76.27 | 85.68 | 99.40 | 103.74 | 99.19 | 88.23 | 80.50 | a | 70.07 | 61.94 | 79.27 | ||||||||||||
2018 | 61.81 | 60.39 | 64.97 | 78.77 | 84.61 | 98.47 | 103.90 | 101.29 | 94.47 | 76.81 | 65.17 | 55.58 | 78.85 | |||||||||||||
2019 | 55.77 | 52.21 | 63.65 | 76.80 | 76.35 | 94.30 | 100.48 | 101.65 | 89.97 | 75.61 | 67.20 | 52.03 | 75.50 | |||||||||||||
2020 | 58.26 | 62.86 | 62.03 | 74.03 | 87.84 | 95.10 | 102.71 | 103.48 | 95.60 | 85.52 | 66.97 | 58.37 | d | 79.40 | ||||||||||||
2021 | 56.58 | 61.18 | 64.52 | 79.17 | 86.29 | 100.83 | 102.55 | 101.00 | 94.07 | 74.81 | 72.33 | 54.55 | 78.99 | |||||||||||||
2022 | 58.32 | 62.07 | 70.16 | 77.40 | 85.07 | a | 96.53 | 101.23 | 99.81 | 94.07 | 81.84 | 59.10 | 56.35 | 78.50 | ||||||||||||
2023 | 51.32 | 55.57 | 57.94 | 75.37 | 84.32 | 89.50 | 105.45 | 96.65 | 88.80 | 79.44 | d | 65.07 | 60.00 | q | 77.22 | a | ||||||||||
2024 | 55.81 | 57.38 | 63.48 | 74.05 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.89 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 55.93 | 59.58 | 66.30 | 74.31 | 83.57 | 94.40 | 100.17 | 97.95 | 90.38 | 77.90 | 64.06 | 55.02 | 76.67 | |||||||||||||
S.D. | 3.82 | 3.96 | 4.47 | 3.82 | 4.27 | 3.78 | 2.95 | 2.69 | 3.28 | 3.75 | 3.83 | 3.54 | 1.71 | |||||||||||||
SKEW | -0.01 | 0.36 | 0.11 | -0.68 | -0.43 | -0.40 | -0.30 | -0.41 | -0.64 | 0.27 | -0.14 | 0.07 | -0.56 | |||||||||||||
MAX | 64.45 | 69.36 | 75.16 | 81.23 | 91.29 | 100.83 | 105.45 | 103.48 | 95.60 | 85.87 | 72.33 | 64.19 | 79.40 | |||||||||||||
MIN | 45.16 | 52.21 | 57.94 | 63.57 | 73.23 | 85.27 | 94.35 | 90.23 | 81.60 | 70.00 | 56.53 | 47.26 | 72.12 | |||||||||||||
YRS | 46 | 46 | 46 | 45 | 44 | 46 | 46 | 46 | 46 | 45 | 45 | 45 | 42 |