YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 84.86 | b | 84.81 | 83.87 | 85.70 | 86.65 | 84.07 | 83.90 | 84.84 | e | ||||||
1983 | 83.45 | 83.63 | a | 84.13 | 83.87 | 84.26 | 85.83 | 85.23 | 84.13 | a | 84.72 | a | 85.23 | 84.70 | 83.63 | d | 84.40 | |||||||||
1984 | 82.23 | 82.17 | 83.32 | f | 83.17 | 83.74 | 84.56 | e | 83.93 | a | 83.10 | 83.57 | 83.96 | c | 81.14 | b | 79.24 | b | 82.80 | a | ||||||
1985 | 81.52 | b | 81.76 | c | 80.79 | b | 80.82 | b | 82.10 | 84.68 | b | 82.87 | 84.68 | 85.62 | a | 83.06 | 81.52 | a | 79.74 | 82.43 | ||||||
1986 | 82.77 | 83.43 | 85.19 | 83.50 | 84.13 | a | 82.27 | 87.10 | b | 87.71 | 84.27 | 84.90 | 82.87 | 82.26 | 84.20 | |||||||||||
1987 | 81.93 | a | 81.14 | 81.06 | 81.47 | 80.35 | 83.00 | 84.06 | 84.81 | 85.03 | 83.74 | 84.27 | 81.34 | b | 82.68 | |||||||||||
1988 | 80.81 | 80.31 | 81.20 | a | 80.97 | 81.32 | 82.90 | 84.68 | 84.45 | 85.33 | 85.26 | 82.90 | 81.86 | c | 82.67 | |||||||||||
1989 | 79.58 | 79.68 | 81.35 | 81.30 | 82.23 | 83.00 | 83.10 | 83.81 | 83.87 | 83.29 | 82.60 | 82.16 | 82.16 | |||||||||||||
1990 | 80.06 | 79.39 | 79.77 | 81.50 | 83.60 | a | 83.33 | 85.32 | 86.65 | 86.57 | b | 85.97 | ----- | z | 81.57 | c | 83.07 | a | ||||||||
1991 | 81.50 | c | 81.96 | b | 80.29 | ----- | z | 82.10 | b | 82.13 | 82.03 | b | 83.26 | 83.47 | 82.13 | 81.30 | 79.93 | a | 81.83 | a | ||||||
1992 | 78.69 | b | 79.54 | a | 79.55 | 80.62 | a | 82.68 | 83.28 | a | 84.14 | b | 84.17 | a | 84.79 | a | 84.30 | a | 81.89 | b | 79.86 | b | 81.96 | |||
1993 | 80.18 | c | 78.61 | 79.87 | a | 80.34 | a | 80.17 | a | 81.21 | a | 82.84 | 83.48 | 84.46 | b | 82.21 | c | 81.70 | 79.21 | b | 81.19 | |||||
1994 | 77.43 | a | 79.18 | f | 78.85 | d | 80.07 | 80.97 | a | 81.96 | b | 84.33 | a | 83.70 | d | 83.45 | h | 82.85 | k | 80.17 | a | 79.52 | b | 80.78 | c | |
1995 | 79.55 | 80.11 | 81.67 | a | 80.78 | c | 81.90 | 83.00 | b | 84.20 | a | 84.32 | 84.86 | a | 84.68 | 82.59 | a | 82.13 | 82.48 | |||||||
1996 | 80.69 | e | 81.29 | v | 78.81 | e | 81.83 | 83.42 | 84.23 | 84.26 | 85.13 | a | 83.83 | 83.77 | a | 80.46 | b | 80.77 | 82.47 | a | ||||||
1997 | 81.43 | a | 80.60 | c | 79.53 | a | 80.60 | 82.06 | 83.30 | 83.47 | a | 83.97 | b | 84.20 | 84.29 | 82.62 | a | 79.97 | a | 82.17 | ||||||
1998 | 80.40 | a | 80.25 | 81.06 | 80.50 | b | 79.90 | 80.73 | 83.23 | 84.71 | 83.93 | a | 83.03 | 80.67 | 79.94 | 81.53 | ||||||||||
1999 | 78.71 | 78.14 | 78.32 | 79.67 | 80.03 | 80.63 | 82.27 | a | 83.87 | a | 83.24 | a | 81.79 | l | 81.00 | i | 78.95 | j | 80.54 | c | ||||||
2000 | 78.00 | i | 79.70 | i | 80.09 | i | 79.48 | i | 80.35 | h | 81.88 | d | 82.67 | j | 83.74 | h | 83.62 | i | 83.41 | i | 81.65 | m | 79.85 | k | 81.88 | k |
2001 | 80.32 | i | 78.62 | l | 78.86 | j | 79.10 | i | 79.80 | p | 81.26 | k | 83.29 | x | ----- | z | 85.11 | c | 84.23 | a | 83.03 | 82.57 | c | 83.74 | h | |
2002 | 80.58 | g | 79.50 | b | 80.07 | b | 81.71 | b | 81.26 | 83.41 | a | 84.12 | e | 85.56 | d | 84.71 | b | 86.10 | b | 84.93 | b | 83.25 | c | 83.15 | a | |
2003 | 82.40 | a | 81.87 | e | 81.82 | c | 80.27 | d | 83.77 | a | 84.17 | 86.40 | a | 86.87 | a | 85.87 | g | 86.58 | e | 83.74 | k | 86.21 | l | 83.79 | c | |
2004 | 81.00 | j | 82.55 | i | 81.67 | g | 81.03 | a | 83.08 | e | 83.50 | n | 84.76 | n | 85.59 | i | 86.10 | j | 84.00 | b | 82.24 | i | 80.23 | e | 82.09 | h |
2005 | 81.57 | c | 79.96 | d | 81.96 | c | 81.81 | d | 83.52 | d | 83.11 | b | 83.80 | f | 85.18 | c | 87.22 | c | ----- | z | 81.79 | b | 81.42 | 82.75 | b | |
2006 | 79.39 | 79.61 | 76.19 | 79.90 | 80.61 | 82.81 | c | 84.23 | a | 84.93 | a | 83.62 | a | 83.07 | a | 82.52 | a | 79.90 | b | 81.40 | ||||||
2007 | 77.74 | 78.93 | 79.84 | 81.00 | 81.83 | a | 82.00 | a | 83.68 | 83.67 | a | 83.43 | 83.23 | 81.86 | b | 79.66 | b | 81.40 | ||||||||
2008 | 78.70 | a | 77.75 | a | 79.61 | 80.40 | 80.61 | 81.00 | 83.86 | b | 83.54 | c | 83.37 | 82.72 | b | 81.17 | a | 77.87 | a | 80.88 | ||||||
2009 | 78.15 | e | 78.00 | d | 76.48 | b | 77.43 | b | 81.96 | c | 83.56 | e | 84.17 | h | 85.58 | l | 84.75 | f | 85.13 | h | 83.77 | d | 83.50 | q | 79.91 | e |
2010 | 83.45 | k | 82.12 | l | 82.33 | s | 80.90 | t | 82.24 | j | 83.00 | q | 82.31 | r | 82.15 | e | 84.62 | q | 83.75 | k | 82.00 | k | 81.22 | h | 82.15 | k |
2011 | 80.07 | p | 82.18 | q | 81.65 | k | 81.40 | y | 81.26 | l | 83.67 | i | 84.18 | c | 84.50 | q | 82.95 | h | 83.13 | p | 81.85 | q | 79.89 | l | 84.18 | k |
2012 | 80.00 | q | 80.14 | o | 78.92 | e | 78.96 | d | 80.87 | a | 81.25 | b | 82.31 | b | 82.89 | d | 83.32 | b | 83.38 | b | 82.14 | b | 80.33 | d | 81.44 | b |
2013 | 79.93 | d | 79.96 | a | 80.76 | b | 81.67 | 82.33 | a | 82.55 | h | 84.38 | j | 86.40 | a | 86.77 | d | 86.45 | k | 85.69 | d | 83.90 | k | 82.94 | d | |
2014 | 83.00 | a | 83.26 | e | 85.89 | v | 84.36 | e | 84.27 | i | 85.89 | k | 85.20 | f | 86.64 | q | 87.22 | g | 86.69 | r | 86.32 | e | 85.69 | e | 84.53 | g |
2015 | 80.90 | u | 87.00 | w | 85.31 | r | 82.60 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 80.47 | 80.40 | 80.29 | 81.09 | 82.03 | 82.89 | 84.03 | 84.48 | 84.60 | 84.16 | 82.64 | 81.07 | 82.25 | |||||||||||||
S.D. | 1.69 | 1.69 | 1.97 | 1.47 | 1.33 | 1.33 | 1.19 | 1.29 | 1.13 | 1.29 | 1.60 | 1.78 | 1.03 | |||||||||||||
SKEW | -0.05 | 0.41 | 0.27 | 0.17 | 0.06 | 0.13 | 0.60 | 0.76 | 0.78 | 0.43 | 0.62 | 0.67 | 0.86 | |||||||||||||
MAX | 83.45 | 83.63 | 85.19 | 84.36 | 84.26 | 85.83 | 87.10 | 87.71 | 87.22 | 86.65 | 86.32 | 85.69 | 84.40 | |||||||||||||
MIN | 77.43 | 77.75 | 76.19 | 77.43 | 79.90 | 80.63 | 82.03 | 82.15 | 83.24 | 82.13 | 80.17 | 77.87 | 80.88 | |||||||||||||
YRS | 25 | 24 | 25 | 27 | 27 | 27 | 25 | 27 | 25 | 24 | 26 | 26 | 14 |