YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.68 | b | 57.05 | 57.86 | j | |
1980 | 57.97 | a | 60.26 | 58.27 | a | 63.34 | b | 62.29 | 70.57 | 77.18 | 76.12 | b | 72.77 | 67.75 | a | 60.20 | 58.79 | b | 65.46 | |||||||
1981 | 57.95 | a | 60.16 | 58.80 | a | 64.12 | 67.56 | ----- | z | 77.53 | a | 78.85 | 75.25 | 65.37 | 60.77 | 57.02 | a | 65.76 | a | |||||||
1982 | 54.05 | b | 58.35 | d | 57.75 | c | 62.42 | 65.96 | d | 67.13 | c | 74.98 | b | 77.67 | b | 74.52 | d | 67.57 | a | 57.65 | ----- | z | 65.28 | a | ||
1983 | 56.69 | 57.17 | d | 59.03 | b | 59.52 | a | 66.36 | b | 69.20 | c | 74.26 | 78.72 | a | 77.52 | b | 69.77 | c | 58.41 | b | 55.07 | a | 65.14 | |||
1984 | 55.90 | a | 57.12 | a | 61.20 | a | 61.93 | c | 68.94 | e | 69.55 | b | 79.38 | c | 77.14 | b | 79.86 | e | 65.93 | d | 57.73 | b | 52.77 | g | 66.79 | a |
1985 | 52.84 | b | 54.54 | b | 56.50 | e | 64.44 | d | 65.00 | e | 71.70 | e | 78.11 | d | 75.26 | d | 70.02 | g | 67.89 | c | 57.17 | d | 55.82 | 63.57 | a | |
1986 | 59.22 | d | ----- | z | 60.77 | c | 62.90 | e | 65.87 | d | 71.33 | 73.72 | d | 77.20 | c | 68.59 | b | 66.15 | d | 61.11 | b | 54.68 | c | 65.59 | a | |
1987 | 52.38 | c | 55.59 | a | 57.91 | b | 64.71 | f | 66.29 | b | 69.50 | d | 70.02 | g | 73.20 | f | 73.58 | d | 70.89 | d | ----- | z | 50.45 | c | 62.07 | d |
1988 | 53.81 | d | 58.72 | d | 59.96 | e | 62.30 | j | 65.90 | f | 67.63 | d | 74.63 | d | 74.62 | a | 72.77 | h | 69.00 | f | 59.63 | d | 54.22 | b | 62.90 | d |
1989 | 53.05 | c | 56.50 | k | 61.16 | i | 69.06 | l | 65.77 | c | 69.97 | k | 74.74 | f | 74.04 | c | 73.05 | i | 66.97 | b | 61.77 | b | 55.00 | h | 64.32 | g |
1990 | 54.28 | d | 53.86 | g | 59.21 | c | 63.94 | c | 65.50 | e | 72.42 | f | 77.07 | d | 75.28 | b | 74.28 | e | 69.29 | c | 61.14 | a | 52.57 | c | 65.26 | b |
1991 | 55.22 | h | 59.91 | e | 55.17 | e | 61.50 | d | 63.50 | d | 67.23 | d | 71.81 | 74.18 | c | ----- | z | 71.70 | h | 62.27 | d | 55.36 | c | 63.44 | c | |
1992 | 54.82 | c | 59.83 | e | 58.56 | d | ----- | z | 69.43 | d | ----- | z | 75.74 | d | 79.07 | c | 75.97 | a | ----- | z | 59.62 | a | 51.89 | d | 64.99 | c |
1993 | 56.43 | d | 56.71 | b | 62.02 | a | 64.85 | d | 68.26 | f | 72.37 | d | 72.80 | a | 74.11 | d | 73.22 | e | 68.04 | e | 60.28 | c | 54.97 | b | 65.07 | a |
1994 | 56.20 | c | 54.85 | b | ----- | z | 62.82 | 63.91 | c | ----- | z | 73.89 | c | 78.85 | ----- | z | 66.13 | a | 55.03 | a | 53.97 | 62.85 | c | |||
1995 | 54.83 | a | 60.54 | 58.48 | a | 60.42 | 61.73 | 67.52 | a | 74.26 | b | 78.96 | h | 76.91 | b | 69.25 | a | 64.43 | 57.13 | 64.14 | a | |||||
1996 | ----- | z | 58.61 | b | 60.42 | a | 65.64 | a | 69.11 | d | 72.77 | d | 77.26 | b | 79.03 | k | 74.71 | m | 65.23 | g | 61.32 | b | 56.85 | e | 65.25 | d |
1997 | 56.41 | d | 56.04 | e | 63.54 | f | 63.15 | d | 72.31 | d | 71.67 | 74.47 | a | 77.97 | k | ----- | z | 70.02 | b | 63.35 | j | ----- | z | 66.30 | e | |
1998 | 56.02 | d | 55.25 | 58.73 | e | ----- | z | 63.97 | 68.98 | a | ----- | z | ----- | z | ----- | z | ----- | z | 60.00 | a | ----- | z | 60.49 | f | ||
1999 | 56.52 | c | 55.80 | 56.57 | d | 58.54 | f | 64.36 | b | 68.57 | b | 74.95 | a | 74.73 | c | 72.10 | a | 71.94 | e | 61.52 | e | 56.15 | e | 64.84 | a | |
2000 | 57.93 | b | 58.89 | b | 59.50 | a | 65.69 | c | 69.03 | 73.02 | a | 74.19 | d | 77.33 | d | 74.73 | 65.66 | c | 57.12 | b | 58.05 | c | 65.93 | |||
2001 | 52.46 | d | 54.43 | a | 60.05 | b | 61.13 | c | 69.20 | a | 72.36 | a | 74.05 | 76.52 | g | 74.47 | 69.50 | g | 61.96 | b | 52.20 | h | 64.46 | c | ||
2002 | 54.66 | 57.77 | b | 57.93 | a | 62.09 | c | 65.07 | c | 70.00 | e | 73.39 | d | 74.10 | k | 75.07 | h | 65.23 | e | 63.71 | b | 54.46 | d | 62.43 | b | |
2003 | 61.54 | d | 57.60 | m | 61.08 | f | 59.90 | d | 65.65 | d | 67.28 | e | 75.83 | b | 79.24 | b | 75.11 | c | 72.26 | h | 59.83 | d | 55.02 | g | 68.05 | d |
2004 | 56.42 | e | 55.16 | d | 64.40 | g | 67.22 | n | 70.15 | n | 69.00 | f | 76.00 | a | 75.33 | e | 75.69 | l | 65.61 | h | 58.08 | f | 56.27 | c | 63.84 | g |
2005 | 56.12 | c | 56.88 | d | 60.23 | a | 63.20 | c | 68.07 | b | 69.32 | 76.34 | 76.68 | a | 72.94 | e | 67.42 | f | 63.11 | c | 58.31 | 65.56 | a | |||
2006 | 56.18 | a | 58.58 | b | 55.04 | c | 62.60 | a | 67.16 | 75.11 | c | 80.85 | 76.77 | a | 75.31 | c | 66.21 | j | 64.79 | d | 56.24 | b | 66.24 | a | ||
2007 | 53.59 | d | 57.92 | c | 62.81 | 62.97 | 67.15 | d | 70.62 | 75.93 | c | 78.95 | j | 73.13 | g | 69.25 | g | 63.03 | 54.17 | a | 63.13 | c | ||||
2008 | 54.48 | b | 56.38 | c | 61.74 | n | 65.28 | a | 66.70 | a | 75.22 | a | 73.35 | e | 77.85 | d | 77.28 | c | 72.30 | f | 66.73 | 55.98 | a | 66.93 | b | |
2009 | 59.76 | 55.80 | a | 60.13 | a | 62.02 | e | 67.60 | a | 68.42 | 76.48 | 76.55 | 76.93 | 67.56 | 61.25 | 55.03 | 65.63 | |||||||||
2010 | 56.97 | 56.70 | a | 58.89 | 60.83 | d | 64.89 | 68.68 | 72.55 | a | 75.06 | 73.23 | 66.02 | 59.13 | 56.10 | 64.09 | ||||||||||
2011 | 56.84 | 53.23 | 58.23 | 62.92 | d | 64.55 | 67.73 | 74.11 | 75.18 | 72.87 | 67.33 | a | 58.80 | b | 52.74 | 63.71 | ||||||||||
2012 | 57.06 | 56.45 | 57.53 | 61.67 | 66.10 | 68.30 | 72.92 | 78.03 | 78.10 | 69.52 | 61.87 | 55.32 | 65.24 | |||||||||||||
2013 | 53.10 | 54.29 | 61.40 | 62.52 | 67.87 | 70.35 | 74.03 | 75.21 | 74.67 | 65.25 | a | 61.10 | 55.68 | 64.62 | ||||||||||||
2014 | 59.16 | 60.11 | 62.97 | 64.57 | 69.44 | 70.98 | 77.11 | 77.48 | 78.97 | a | 71.98 | 63.60 | 58.65 | 67.92 | ||||||||||||
2015 | 58.82 | 62.36 | 65.39 | 64.83 | 64.39 | 72.87 | 74.84 | 78.58 | 78.98 | 73.26 | 59.98 | 54.55 | 67.40 | |||||||||||||
2016 | 55.58 | 62.28 | 61.44 | 64.33 | 64.81 | 73.63 | 76.94 | 77.63 | 73.90 | 70.32 | 63.80 | 57.42 | 66.84 | |||||||||||||
2017 | 55.44 | 58.41 | 63.61 | 65.77 | 66.02 | 71.90 | 77.29 | 77.29 | 74.68 | 71.42 | 64.58 | 58.74 | 67.10 | |||||||||||||
2018 | 60.87 | 57.55 | 60.27 | 64.30 | 65.16 | 70.67 | 79.39 | 79.52 | 74.27 | 69.10 | 62.75 | 56.90 | 66.73 | |||||||||||||
2019 | 56.21 | 52.77 | 58.82 | 64.22 | 62.94 | 70.40 | 74.92 | 76.50 | 74.85 | 67.85 | 62.20 | 55.74 | 64.78 | |||||||||||||
2020 | 56.26 | 57.60 | 57.82 | 63.17 | 69.29 | 70.92 | 75.44 | 79.45 | 78.03 | 72.50 | 61.38 | 56.47 | 66.53 | |||||||||||||
2021 | 56.32 | 57.41 | 56.77 | 63.43 | 65.58 | 71.40 | 76.63 | 77.60 | 75.77 | 66.37 | 64.97 | 54.97 | 65.60 | |||||||||||||
2022 | 56.13 | 55.96 | 59.74 | 63.53 | 64.76 | 72.53 | 74.34 | 78.31 | 77.68 | 68.82 | 57.15 | 54.74 | 65.31 | |||||||||||||
2023 | 53.35 | 52.16 | 54.85 | 60.52 | 62.76 | 66.52 | 76.27 | 76.53 | 72.23 | 68.69 | 61.37 | 57.79 | 63.59 | |||||||||||||
2024 | 55.21 | 55.69 | 57.21 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.45 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 56.04 | 57.18 | 59.28 | 63.04 | 66.15 | 70.37 | 75.49 | 76.89 | 75.14 | 68.43 | 61.02 | 55.69 | 65.65 | |||||||||||||
S.D. | 2.17 | 2.39 | 2.33 | 1.64 | 2.28 | 2.23 | 1.98 | 1.65 | 2.39 | 2.28 | 2.51 | 1.89 | 1.25 | |||||||||||||
SKEW | 0.44 | 0.12 | 0.32 | -0.27 | 0.37 | 0.23 | 0.55 | -0.15 | -0.16 | 0.39 | -0.08 | -0.54 | 0.07 | |||||||||||||
MAX | 61.54 | 62.36 | 65.39 | 65.77 | 72.31 | 75.22 | 80.85 | 79.52 | 79.86 | 73.26 | 66.73 | 58.79 | 67.92 | |||||||||||||
MIN | 52.38 | 52.16 | 54.85 | 59.52 | 61.73 | 66.52 | 71.81 | 74.04 | 68.59 | 65.23 | 55.03 | 50.45 | 63.59 | |||||||||||||
YRS | 43 | 41 | 38 | 37 | 41 | 38 | 41 | 36 | 33 | 32 | 42 | 38 | 18 |