YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1959 | ----- | z | 52.58 | c | 57.97 | a | 57.10 | 54.50 | 56.33 | 60.10 | 62.15 | 60.42 | 63.42 | 59.30 | 55.03 | 58.08 | a | |||||||||
1960 | 49.85 | 52.45 | 54.06 | 54.87 | 55.42 | 58.66 | a | 58.45 | 57.23 | 58.36 | a | 57.48 | 54.42 | 53.10 | 55.36 | |||||||||||
1961 | 55.02 | 54.30 | 52.77 | 54.78 | 53.85 | 56.93 | 58.76 | 60.58 | 59.48 | 59.77 | 54.28 | 52.77 | 56.11 | |||||||||||||
1962 | 52.89 | 51.14 | 51.42 | 55.25 | 53.82 | 55.50 | 56.63 | 59.76 | 57.78 | 59.50 | 56.72 | 53.44 | 55.32 | |||||||||||||
1963 | 51.23 | 59.16 | 51.85 | 53.57 | 56.21 | 57.73 | 57.89 | 59.66 | 62.42 | 62.06 | 56.80 | 53.24 | 56.82 | |||||||||||||
1964 | 52.13 | 52.33 | 50.74 | 53.40 | 52.94 | 56.42 | 57.82 | 58.63 | 58.74 | a | 59.27 | 53.65 | 53.31 | 54.95 | ||||||||||||
1965 | 52.94 | 50.77 | 52.65 | 54.67 | 52.23 | 55.43 | 57.48 | 59.85 | 60.00 | 64.98 | 57.02 | 50.18 | 55.68 | |||||||||||||
1966 | 49.77 | 50.02 | 52.66 | 57.23 | 55.90 | 57.35 | 57.37 | 58.87 | a | 60.83 | 61.65 | 57.13 | 51.76 | 55.88 | ||||||||||||
1967 | 51.74 | 53.39 | a | 51.67 | a | 50.18 | 55.59 | b | 57.12 | 60.27 | 60.58 | 63.17 | 64.60 | 60.98 | 53.32 | a | 56.88 | |||||||||
1968 | 54.19 | 57.50 | 56.44 | 55.10 | 55.44 | 57.67 | 59.24 | 60.97 | 61.68 | 59.66 | 58.20 | 50.97 | 57.25 | |||||||||||||
1969 | 54.16 | 51.05 | 52.68 | 53.87 | 55.77 | 59.47 | 59.61 | 58.95 | 59.22 | 60.27 | 60.75 | 55.10 | 56.74 | |||||||||||||
1970 | 55.18 | 56.27 | 55.47 | 52.20 | 56.13 | a | 56.63 | 58.71 | 57.97 | 61.25 | 58.82 | 58.05 | 52.69 | 56.61 | ||||||||||||
1971 | 54.00 | 53.32 | 52.26 | 53.15 | 54.63 | 56.53 | 58.63 | 61.73 | 62.05 | 56.78 | a | 55.25 | 49.19 | 55.63 | ||||||||||||
1972 | 52.11 | 54.93 | 55.76 | 55.12 | 55.37 | 59.57 | a | 60.98 | 61.32 | 63.42 | 63.58 | 57.07 | 51.81 | 57.59 | ||||||||||||
1973 | 51.42 | 56.05 | 51.85 | 54.35 | 55.92 | a | 58.27 | b | 58.76 | 58.82 | 61.47 | 60.35 | 54.83 | 53.94 | 56.34 | |||||||||||
1974 | 52.11 | 52.89 | 54.60 | 54.34 | a | 53.31 | 57.62 | 59.16 | 59.89 | 58.63 | 58.77 | 55.82 | 51.47 | 55.72 | ||||||||||||
1975 | 52.08 | a | 50.66 | 50.68 | a | 50.08 | 53.56 | 56.80 | 56.47 | a | 58.34 | 57.07 | 56.94 | 54.12 | a | 51.65 | 54.04 | |||||||||
1976 | 54.52 | 53.57 | 52.69 | 52.10 | 55.02 | 57.91 | c | 59.34 | 60.95 | a | 61.32 | 61.65 | a | 58.52 | 53.88 | a | 56.79 | |||||||||
1977 | 52.69 | 56.45 | 49.56 | 51.78 | 54.57 | d | 57.14 | a | 57.92 | a | 60.68 | 60.48 | 58.84 | 59.98 | 57.40 | 56.46 | ||||||||||
1978 | 54.79 | 54.05 | 58.34 | 54.15 | 55.98 | c | 56.05 | a | 56.61 | 58.73 | 62.90 | 58.11 | 54.18 | 49.85 | 56.15 | |||||||||||
1979 | 49.85 | 50.38 | 53.23 | 54.38 | 56.02 | b | 56.92 | 58.13 | a | 58.84 | 62.48 | 60.29 | 54.38 | 54.13 | 55.75 | |||||||||||
1980 | 55.23 | 55.93 | 53.52 | 55.57 | 54.08 | 56.05 | a | 58.82 | 59.58 | 58.82 | 58.23 | 58.78 | 56.85 | 56.79 | ||||||||||||
1981 | 54.13 | 54.41 | 54.08 | 55.41 | a | 55.13 | a | 59.30 | b | 59.03 | 58.89 | 58.88 | 56.83 | a | 56.13 | 53.29 | 56.29 | |||||||||
1982 | 49.95 | 54.06 | b | 52.71 | 55.22 | a | 54.88 | a | 57.17 | 57.35 | a | 59.10 | 61.19 | a | 59.83 | a | 55.62 | 52.45 | 55.79 | |||||||
1983 | 54.69 | 54.57 | a | 55.00 | 54.72 | a | 56.00 | 58.02 | b | 62.23 | 63.42 | 63.81 | a | 63.94 | f | 55.67 | 52.81 | 57.36 | a | |||||||
1984 | 52.65 | 52.48 | c | 56.12 | a | 52.45 | a | 57.37 | a | 56.78 | 61.22 | b | 63.50 | d | 67.92 | d | 59.77 | e | 54.84 | b | 50.73 | c | 57.15 | |||
1985 | 50.36 | f | 51.00 | g | 50.39 | d | 55.42 | d | 54.77 | c | 59.22 | n | 60.73 | c | 58.70 | c | 60.09 | b | 59.80 | f | 53.23 | j | 53.17 | a | 56.18 | e |
1986 | 54.88 | e | 54.17 | b | 54.11 | c | 54.50 | c | 53.02 | a | 56.20 | b | 57.80 | a | 58.28 | a | 57.52 | 57.85 | 57.87 | 49.34 | c | 55.46 | ||||
1987 | 45.37 | a | 49.58 | b | 51.53 | b | 54.82 | 54.98 | d | 56.33 | 57.79 | 59.23 | 58.78 | 60.28 | b | 55.31 | a | 48.69 | 54.39 | |||||||
1988 | 50.17 | b | 56.02 | 56.82 | a | 56.67 | 54.07 | a | 56.48 | 59.08 | 60.68 | 57.43 | a | 58.58 | a | 55.13 | 50.59 | b | 55.98 | |||||||
1989 | 49.32 | a | 49.06 | a | 53.85 | 57.02 | a | 53.32 | a | 56.95 | 56.74 | 56.97 | 56.67 | a | 58.77 | 57.50 | 52.58 | 54.90 | ||||||||
1990 | 50.97 | 48.77 | 51.90 | 54.72 | 54.28 | a | 56.70 | 59.03 | 60.29 | 59.64 | a | 59.35 | 56.76 | a | 48.43 | a | 55.07 | |||||||||
1991 | 51.06 | 53.86 | 49.45 | a | 52.13 | 50.56 | 52.98 | b | 57.71 | 57.12 | b | 56.75 | 55.81 | 56.62 | a | 50.73 | 53.73 | |||||||||
1992 | 50.60 | 54.24 | b | 53.69 | 56.25 | 56.97 | 56.67 | 57.45 | b | 56.55 | 56.52 | b | 57.90 | 54.90 | 47.24 | 54.91 | ||||||||||
1993 | 49.33 | b | 49.38 | 55.34 | b | 55.71 | b | 57.81 | b | 58.55 | b | 59.98 | a | 60.72 | b | 60.57 | b | 61.18 | a | 58.31 | c | 52.98 | a | 56.66 | ||
1994 | 53.88 | b | 52.21 | b | 56.33 | b | 54.77 | 55.07 | a | 55.35 | 57.26 | 59.47 | a | 59.15 | 58.81 | 51.72 | 51.13 | 55.43 | ||||||||
1995 | 54.06 | 57.63 | a | 56.44 | 54.52 | c | 55.65 | 56.53 | a | 59.95 | 59.55 | a | 59.57 | a | 61.29 | 58.91 | a | 53.63 | a | 57.31 | ||||||
1996 | 53.32 | a | 55.54 | a | 55.32 | 58.81 | a | 57.38 | a | 57.14 | a | 57.87 | 58.76 | 58.72 | 59.65 | a | 57.47 | 54.93 | a | 57.08 | ||||||
1997 | 53.42 | 53.57 | 55.20 | a | 53.43 | 59.78 | a | 58.30 | 59.60 | 63.57 | b | 65.16 | a | 62.95 | 59.37 | 52.88 | a | 58.10 | ||||||||
1998 | 53.39 | 55.96 | 54.15 | 53.10 | 55.90 | 58.85 | 59.39 | 61.00 | 61.33 | 58.22 | a | 55.18 | 50.45 | a | 56.41 | |||||||||||
1999 | 52.63 | 51.74 | a | 50.33 | a | 51.10 | 52.26 | 53.85 | 58.73 | 57.29 | 57.28 | 59.06 | 55.10 | 54.74 | 54.51 | |||||||||||
2000 | 52.45 | 53.35 | c | 53.97 | 55.52 | 55.31 | 57.63 | 57.63 | 58.41 | b | 60.93 | 57.73 | a | 53.22 | 54.44 | 55.88 | ||||||||||
2001 | 50.95 | 51.54 | 54.77 | 51.88 | 56.90 | a | 57.97 | 58.82 | a | 57.26 | 59.05 | a | 58.27 | a | 56.00 | 50.97 | 55.36 | |||||||||
2002 | 49.22 | a | 54.33 | a | 50.97 | 53.33 | 53.65 | 55.98 | 58.94 | e | 57.84 | 57.92 | 55.50 | 58.75 | 52.73 | a | 54.93 | |||||||||
2003 | 58.03 | 54.50 | 55.48 | 52.95 | 56.75 | a | 57.31 | a | 57.72 | b | 61.18 | a | 60.41 | a | 59.79 | 54.98 | 52.18 | 56.77 | ||||||||
2004 | 51.34 | 51.57 | 57.65 | 54.77 | 56.45 | 57.63 | 60.00 | 60.43 | a | 60.30 | 58.62 | a | 53.09 | c | 53.29 | e | 56.26 | |||||||||
2005 | 53.95 | b | 54.54 | c | 56.22 | b | 54.60 | 57.27 | 57.05 | 58.03 | 58.86 | b | 57.11 | b | 57.65 | a | 58.26 | a | 54.07 | b | 56.47 | |||||
2006 | 52.93 | a | 52.96 | d | 49.18 | c | 54.85 | c | 55.68 | 57.38 | 59.02 | 60.00 | b | 58.68 | 58.19 | 57.53 | 53.35 | 55.81 | ||||||||
2007 | 51.35 | r | 54.72 | a | 59.38 | a | 58.12 | a | 58.84 | 60.62 | f | 61.13 | 62.31 | 65.75 | p | 62.98 | c | 59.88 | 53.47 | o | 59.67 | d | ||||
2008 | 53.77 | ----- | z | 56.95 | a | 57.78 | 59.00 | 57.62 | v | 64.69 | 64.38 | g | 63.91 | b | 63.71 | l | 61.02 | 52.95 | 58.76 | d | ||||||
2009 | 58.48 | 55.25 | 56.23 | 56.48 | a | 59.42 | 63.04 | p | 61.69 | 62.92 | a | 63.26 | i | 63.32 | f | 56.93 | 53.40 | 57.87 | c | |||||||
2010 | 55.52 | 55.46 | 55.45 | j | 56.68 | 56.89 | 59.09 | c | 62.22 | f | 62.76 | f | 62.12 | d | 60.52 | f | 57.05 | a | 53.94 | 57.09 | d | |||||
2011 | 53.97 | a | 52.23 | 55.89 | 57.86 | a | 58.75 | a | 62.16 | a | 66.87 | 66.00 | 65.72 | 66.16 | 58.65 | ----- | z | 60.39 | a | |||||||
2012 | ----- | z | ----- | z | ----- | z | 60.58 | 60.58 | 63.43 | 66.48 | a | 66.34 | 64.62 | 66.68 | 61.83 | 55.79 | 62.93 | c | ||||||||
2013 | 54.02 | 54.87 | a | 58.68 | 59.38 | 61.56 | 62.38 | 65.81 | 65.61 | 65.03 | 62.34 | 59.85 | 54.44 | 60.33 | ||||||||||||
2014 | 58.58 | 58.98 | 60.69 | 60.72 | 62.88 | c | 63.35 | 68.68 | 68.39 | 65.80 | 68.66 | 62.13 | 58.21 | 63.09 | ||||||||||||
2015 | 59.47 | 60.84 | 62.94 | 60.47 | 61.23 | 64.95 | 70.65 | a | 69.26 | 72.17 | a | 69.77 | 59.20 | 52.98 | 63.66 | |||||||||||
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2020 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2024 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 52.91 | 53.73 | 54.27 | 54.98 | 55.91 | 57.67 | 59.68 | 60.40 | 60.78 | 60.26 | 56.98 | 52.70 | 56.39 | |||||||||||||
S.D. | 2.59 | 2.58 | 2.90 | 2.38 | 2.41 | 2.22 | 2.99 | 2.75 | 3.07 | 3.07 | 2.36 | 2.16 | 1.85 | |||||||||||||
SKEW | 0.11 | 0.30 | 0.51 | 0.43 | 0.73 | 1.34 | 1.96 | 1.38 | 1.20 | 1.22 | 0.16 | -0.07 | 2.35 | |||||||||||||
MAX | 59.47 | 60.84 | 62.94 | 60.72 | 62.88 | 64.95 | 70.65 | 69.26 | 72.17 | 69.77 | 62.13 | 58.21 | 63.66 | |||||||||||||
MIN | 45.37 | 48.77 | 49.18 | 50.08 | 50.56 | 52.98 | 56.47 | 56.55 | 56.52 | 55.50 | 51.72 | 47.24 | 53.73 | |||||||||||||
YRS | 53 | 54 | 55 | 57 | 57 | 53 | 56 | 55 | 55 | 52 | 56 | 55 | 48 |