YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.67 | m | 68.05 | a | 66.63 | 64.52 | 61.55 | 65.19 | h | |||
1979 | 59.47 | 60.41 | 59.77 | 61.40 | 62.84 | 64.33 | 65.74 | 67.27 | 67.52 | 67.39 | 64.50 | 63.55 | 63.68 | |||||||||||||
1980 | 61.11 | 61.97 | 63.00 | 63.07 | 64.92 | 65.17 | 66.50 | 66.79 | 67.85 | 66.78 | a | 64.75 | f | 64.56 | 64.70 | a | ||||||||||
1981 | 62.82 | 62.34 | 61.87 | 63.22 | 64.03 | a | 66.63 | 66.55 | 66.39 | 66.80 | 65.58 | 63.32 | 61.35 | 64.24 | ||||||||||||
1982 | 60.27 | 60.07 | 59.84 | 61.08 | 62.29 | 65.88 | ----- | z | 67.65 | a | 66.90 | a | 65.53 | 63.70 | 60.67 | a | 63.08 | a | ||||||||
1983 | 60.12 | a | 59.76 | a | 60.61 | 61.08 | 61.89 | 64.62 | 65.06 | 65.39 | 65.72 | a | 64.90 | 64.14 | a | 63.08 | 63.03 | |||||||||
1984 | 61.97 | 60.52 | 62.77 | a | 63.05 | 64.02 | a | 64.85 | 66.35 | 67.00 | a | 66.50 | 67.23 | 65.46 | b | 61.65 | 64.28 | |||||||||
1985 | 60.13 | a | 60.82 | 60.60 | 61.72 | 62.47 | 64.57 | 66.92 | 67.72 | b | 66.57 | 65.40 | b | 63.77 | 62.10 | a | 63.56 | |||||||||
1986 | 61.34 | b | 61.66 | 63.55 | 63.77 | 64.34 | 66.12 | a | 67.24 | 68.53 | 69.02 | 67.07 | a | 66.07 | 62.00 | 65.06 | ||||||||||
1987 | 60.73 | a | 59.14 | 59.92 | a | 61.07 | 61.10 | a | 65.32 | 66.73 | 67.45 | 68.71 | a | 66.38 | a | 64.80 | 64.11 | 63.79 | ||||||||
1988 | 61.71 | b | 61.91 | 62.48 | b | 62.55 | b | 64.60 | 66.02 | 67.02 | 67.02 | 67.05 | 66.47 | 65.30 | 62.87 | a | 64.58 | |||||||||
1989 | 61.73 | 61.45 | 62.13 | 62.17 | 63.63 | 65.30 | 66.48 | 66.34 | 65.75 | 66.13 | 63.50 | 60.55 | 63.76 | |||||||||||||
1990 | 61.10 | 59.36 | 59.90 | 62.42 | 63.56 | 64.87 | 65.71 | 67.48 | 68.03 | 66.32 | 65.23 | 61.85 | 63.82 | |||||||||||||
1991 | 60.40 | j | 61.47 | i | 60.39 | 62.02 | 63.27 | 64.37 | 66.58 | 67.75 | a | 67.17 | 66.89 | 65.92 | 61.79 | 64.61 | b | |||||||||
1992 | 59.77 | 59.53 | 60.29 | 62.78 | 65.06 | 66.08 | 66.50 | 67.32 | 68.23 | 66.84 | 64.78 | 63.16 | 64.20 | |||||||||||||
1993 | 58.18 | 58.50 | 59.69 | 62.35 | 63.55 | 65.05 | a | 66.82 | 67.74 | 67.12 | a | 65.82 | 63.43 | 60.79 | 63.25 | |||||||||||
1994 | 60.03 | 61.25 | 61.18 | 61.68 | 63.33 | b | 64.63 | d | 67.12 | b | 68.08 | a | 68.00 | a | 65.92 | a | 64.31 | c | 60.75 | c | 63.86 | |||||
1995 | 59.48 | d | 60.36 | 61.53 | a | 62.73 | 63.35 | 65.28 | 67.13 | 67.75 | a | 67.18 | 66.11 | 65.70 | 64.69 | b | 64.28 | |||||||||
1996 | 62.68 | a | 60.17 | 59.45 | c | 63.79 | b | 64.34 | 66.80 | 67.74 | 68.32 | 67.02 | 67.13 | a | 64.25 | 60.90 | a | 64.38 | ||||||||
1997 | 62.40 | 61.57 | a | 61.50 | a | 62.62 | 63.69 | 66.12 | 66.83 | a | 67.60 | 67.22 | a | 66.90 | a | 63.97 | a | 60.71 | 64.26 | |||||||
1998 | 60.32 | 60.48 | a | 61.40 | 61.50 | 61.66 | 63.52 | 65.42 | 67.02 | 65.93 | 65.42 | 63.57 | 61.80 | c | 63.17 | |||||||||||
1999 | 60.75 | a | 60.30 | a | 61.08 | 61.73 | 62.98 | 64.13 | 65.65 | 66.05 | b | 65.48 | 65.05 | 63.08 | 61.81 | 63.17 | ||||||||||
2000 | 59.15 | 60.97 | 61.74 | 61.84 | a | 63.71 | 65.40 | 66.69 | 67.24 | 66.72 | 66.18 | 63.84 | a | 62.10 | 63.80 | |||||||||||
2001 | 62.05 | 61.24 | e | 61.02 | 62.57 | 62.92 | 64.97 | 66.63 | 68.18 | 66.90 | 66.35 | 64.65 | 62.97 | 64.20 | ||||||||||||
2002 | 61.32 | 59.43 | 61.32 | 63.02 | a | 64.35 | 65.48 | 66.81 | 67.58 | 66.25 | 66.35 | 63.85 | 62.00 | 63.98 | ||||||||||||
2003 | 60.21 | 59.86 | 62.98 | 62.98 | 64.95 | 65.40 | 67.48 | 68.08 | 67.42 | 67.03 | 64.78 | 62.68 | 64.49 | |||||||||||||
2004 | 61.92 | 62.91 | 62.13 | a | 62.53 | 64.94 | 65.95 | 66.87 | 68.58 | 68.23 | 67.42 | a | 64.67 | 62.44 | 64.88 | |||||||||||
2005 | 62.31 | 60.64 | 60.76 | 62.70 | 64.82 | 65.93 | 66.79 | 66.89 | 68.13 | 65.53 | 64.47 | 61.95 | 64.24 | |||||||||||||
2006 | 61.97 | 59.86 | 62.85 | 61.57 | 62.06 | 64.77 | 66.37 | 67.23 | 66.48 | 66.15 | a | 64.50 | 61.60 | 63.78 | ||||||||||||
2007 | 61.23 | 60.05 | 61.98 | 61.73 | 63.55 | 65.32 | 66.63 | 66.56 | 66.38 | 66.03 | 64.23 | 62.43 | b | 63.84 | ||||||||||||
2008 | 59.13 | 60.16 | 61.39 | 62.47 | 62.82 | 65.02 | 66.58 | 66.06 | 65.43 | 65.16 | 63.43 | 62.03 | 63.31 | |||||||||||||
2009 | 59.81 | 59.20 | 59.42 | 60.83 | 63.45 | 65.59 | c | 66.65 | 67.58 | 66.80 | 67.42 | 64.30 | 61.89 | 63.58 | ||||||||||||
2010 | 61.58 | 59.82 | 60.79 | 61.57 | 63.47 | 64.68 | 65.39 | 65.55 | 65.53 | 65.52 | 64.00 | 62.68 | 63.38 | |||||||||||||
2011 | 60.44 | 61.45 | 62.13 | 62.48 | 64.06 | 64.28 | 65.06 | 65.90 | 65.48 | 64.56 | 63.25 | 61.45 | 63.38 | |||||||||||||
2012 | 61.60 | 60.43 | a | 60.89 | 61.38 | 62.73 | 63.53 | 64.42 | 65.89 | 64.42 | 65.15 | 63.28 | 62.50 | 63.02 | ||||||||||||
2013 | 60.68 | 59.54 | 59.52 | 61.81 | a | 63.73 | 64.71 | a | 66.19 | 65.98 | 66.97 | 65.69 | 64.19 | d | 62.59 | b | 63.47 | |||||||||
2014 | 60.05 | 62.38 | 61.39 | 62.48 | 63.73 | 65.02 | a | 66.84 | 67.42 | 67.63 | d | 66.84 | 64.23 | 61.42 | a | 64.12 | ||||||||||
2015 | 59.43 | b | 61.36 | 60.23 | 63.58 | 62.55 | b | 65.33 | a | 67.87 | 69.94 | 69.22 | a | 67.42 | 66.14 | a | 62.73 | 64.65 | ||||||||
2016 | 61.06 | 60.53 | 61.37 | 63.38 | 63.97 | a | 65.76 | a | 67.10 | a | 68.07 | a | 67.28 | 66.03 | 63.90 | a | 62.28 | a | 64.23 | |||||||
2017 | 59.53 | 60.22 | c | 62.48 | 62.80 | 63.68 | 65.37 | 67.03 | 67.43 | a | 67.05 | 65.82 | a | 63.21 | b | 60.40 | 63.75 | |||||||||
2018 | 61.03 | 61.32 | 61.24 | 63.40 | 64.15 | 65.50 | 67.19 | 67.78 | a | 67.68 | b | 66.75 | a | 64.22 | 62.50 | 64.40 | ||||||||||
2019 | 60.10 | 59.04 | 58.94 | 62.71 | b | 63.85 | a | 66.34 | a | 67.85 | 68.53 | 69.03 | a | 67.34 | 66.21 | a | 64.06 | 64.50 | ||||||||
2020 | 62.28 | a | 60.19 | 61.55 | 62.55 | a | 63.90 | 65.58 | 66.61 | 67.18 | a | 66.80 | 66.74 | 65.40 | a | 63.68 | c | 64.37 | ||||||||
2021 | 62.42 | m | 60.00 | j | 61.08 | l | 61.55 | i | 63.27 | k | 65.24 | i | 66.50 | k | 66.53 | k | 66.25 | j | 65.24 | l | 64.59 | m | 61.87 | l | ----- | z |
2022 | 61.56 | m | 60.58 | j | 61.90 | j | 63.02 | j | 63.10 | j | 64.55 | i | 66.65 | k | 66.88 | j | 66.88 | i | 67.07 | j | 65.19 | l | 62.84 | l | ----- | z |
2023 | 60.73 | k | 61.53 | i | 62.36 | i | 63.03 | k | 63.05 | i | 64.64 | i | 66.62 | k | 67.39 | i | 66.55 | k | 66.30 | i | 65.29 | k | 62.55 | l | ----- | z |
2024 | 62.17 | k | 58.95 | i | 60.75 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 60.80 | 60.54 | 61.17 | 62.34 | 63.53 | 65.23 | 66.57 | 67.29 | 67.06 | 66.26 | 64.38 | 62.20 | 63.94 | |||||||||||||
S.D. | 1.11 | 1.01 | 1.13 | 0.78 | 0.93 | 0.74 | 0.75 | 0.93 | 1.07 | 0.77 | 0.85 | 1.06 | 0.52 | |||||||||||||
SKEW | -0.12 | 0.31 | 0.04 | -0.06 | -0.51 | -0.17 | -0.81 | 0.07 | -0.08 | -0.22 | 0.56 | 0.46 | 0.00 | |||||||||||||
MAX | 62.82 | 62.91 | 63.55 | 63.79 | 65.06 | 66.80 | 67.87 | 69.94 | 69.22 | 67.42 | 66.21 | 64.69 | 65.06 | |||||||||||||
MIN | 58.18 | 58.50 | 58.94 | 60.83 | 61.10 | 63.52 | 64.42 | 65.39 | 64.42 | 64.56 | 63.08 | 60.40 | 63.02 | |||||||||||||
YRS | 41 | 41 | 42 | 42 | 42 | 42 | 41 | 42 | 43 | 43 | 42 | 43 | 39 |