YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1981 | ----- | z | 85.26 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 85.26 | k |
1982 | 83.03 | 83.00 | e | 82.26 | 84.23 | 86.82 | c | 87.37 | 90.00 | 91.29 | 90.34 | a | 89.61 | 86.90 | 83.97 | 86.57 | ||||||||||
1983 | 84.32 | 84.86 | 86.42 | 87.13 | 87.39 | 89.07 | 89.39 | 89.90 | 90.10 | 89.84 | 87.90 | 85.03 | 87.61 | |||||||||||||
1984 | 87.57 | a | 84.76 | 85.00 | a | 85.03 | 85.81 | 87.10 | 87.97 | 87.90 | a | 88.60 | 88.07 | c | 87.20 | 83.55 | 86.55 | |||||||||
1985 | 81.81 | 82.18 | 82.55 | 82.40 | e | 87.26 | 87.33 | 88.84 | 89.13 | 90.07 | 87.84 | 86.07 | ----- | z | 85.95 | a | ||||||||||
1986 | 83.65 | 84.18 | 87.13 | 86.43 | 88.03 | 89.70 | 90.68 | 91.19 | 90.13 | 90.77 | a | 87.90 | 84.42 | 87.85 | ||||||||||||
1987 | 83.58 | 82.39 | 84.00 | 84.13 | 83.60 | a | 88.77 | 89.32 | 90.26 | 91.03 | 89.32 | 87.43 | 84.45 | 86.52 | ||||||||||||
1988 | 83.13 | 84.76 | 84.87 | 85.90 | 86.52 | 87.47 | 87.61 | 88.19 | 88.30 | 87.71 | 88.43 | 85.19 | 86.51 | |||||||||||||
1989 | 83.58 | 81.93 | 83.13 | 83.00 | 86.19 | 87.13 | 87.26 | 88.97 | 88.47 | 87.58 | 86.53 | 84.23 | 85.67 | |||||||||||||
1990 | 81.16 | 80.64 | 81.90 | 84.10 | 85.90 | 86.53 | 88.10 | 89.39 | 89.47 | 88.58 | 85.10 | 82.77 | a | 85.30 | ||||||||||||
1991 | 82.84 | 83.43 | 82.45 | 84.21 | b | 85.13 | 85.70 | 87.10 | 88.00 | 88.07 | 86.35 | 86.10 | 83.59 | b | 85.25 | |||||||||||
1992 | 81.60 | a | 81.17 | 82.90 | 84.10 | 84.55 | 86.73 | 87.84 | 88.23 | 87.86 | b | 88.00 | a | 84.48 | c | 83.42 | 85.07 | |||||||||
1993 | 80.07 | a | 81.21 | 82.23 | a | 83.87 | 83.81 | 86.10 | 86.47 | a | 87.45 | 88.03 | 86.77 | 84.57 | 82.45 | 84.42 | ||||||||||
1994 | 80.84 | 81.00 | 82.23 | 83.07 | 85.00 | 85.03 | 86.42 | 87.97 | 88.40 | 87.58 | 84.83 | 82.30 | a | 84.56 | ||||||||||||
1995 | 80.63 | a | 80.48 | a | 82.90 | 82.79 | b | 84.74 | 86.07 | a | 87.63 | a | 87.83 | a | 88.07 | 87.00 | 86.50 | 84.53 | a | 84.93 | ||||||
1996 | 82.74 | 81.17 | 81.67 | a | 85.10 | 86.52 | 87.17 | 88.26 | 87.68 | 87.60 | 87.55 | 84.37 | 80.67 | a | 85.04 | |||||||||||
1997 | 81.03 | a | 82.61 | 81.77 | 83.90 | 85.06 | 85.87 | 86.48 | 87.10 | 87.73 | 86.32 | 83.93 | 81.39 | 84.43 | ||||||||||||
1998 | 80.55 | 81.43 | 82.16 | 82.53 | 81.29 | 82.67 | 84.35 | 85.48 | 85.60 | 84.77 | 82.90 | 80.77 | 82.88 | |||||||||||||
1999 | 80.26 | 80.25 | 81.06 | 82.03 | 83.77 | 83.00 | 84.26 | 85.16 | 84.60 | 83.48 | 82.87 | 80.97 | a | 82.64 | ||||||||||||
2000 | 79.94 | 80.00 | 82.06 | 81.03 | 82.74 | 84.80 | 85.58 | 86.26 | 85.79 | a | 85.26 | 82.83 | a | 81.35 | 83.14 | |||||||||||
2001 | 81.19 | 79.96 | a | 80.90 | a | 81.33 | 82.74 | 83.03 | a | 84.10 | a | 85.45 | 85.93 | 85.06 | 82.83 | 81.00 | 82.80 | |||||||||
2002 | 80.71 | 80.54 | 81.32 | 83.30 | 83.19 | 85.13 | 85.77 | 85.84 | 85.13 | 83.77 | 83.17 | a | 82.06 | 83.33 | ||||||||||||
2003 | 80.16 | 80.04 | 81.39 | 82.43 | 83.48 | 84.10 | 85.64 | i | 87.45 | k | 87.65 | j | 86.26 | h | 83.44 | l | 82.36 | i | 81.93 | f | ||||||
2004 | 80.65 | k | 82.47 | j | 81.91 | i | 82.80 | j | 83.80 | k | 84.40 | o | 85.19 | j | 86.79 | l | 86.60 | j | 86.25 | k | 84.17 | l | 82.47 | p | ----- | z |
2005 | 80.60 | k | 81.06 | j | 83.00 | k | 84.43 | i | 84.57 | j | 84.90 | i | 85.95 | k | 86.91 | i | 86.67 | i | 84.19 | j | 83.10 | j | 82.24 | j | ----- | z |
2006 | 80.85 | k | 79.84 | i | 80.27 | i | 81.58 | k | 82.14 | i | 83.71 | i | 84.40 | k | 85.82 | i | 84.85 | j | 84.50 | i | 83.47 | k | 80.60 | k | ----- | z |
2007 | 78.76 | j | 77.68 | i | 79.00 | j | 79.70 | j | 80.14 | i | 81.37 | k | 81.52 | j | 81.95 | i | 82.11 | k | 81.26 | h | 79.65 | j | 77.00 | k | ----- | z |
2008 | 76.52 | j | 76.70 | i | 78.21 | l | 78.23 | h | 78.29 | j | 79.45 | j | 80.91 | i | 81.10 | k | 80.57 | i | 80.50 | i | 79.33 | o | 77.52 | j | ----- | z |
2009 | 76.40 | k | 77.21 | i | 75.11 | l | 76.67 | i | 79.40 | k | 81.00 | i | 80.95 | i | 82.22 | m | 81.95 | i | 81.81 | j | 79.22 | l | 78.55 | i | ----- | z |
2010 | 78.00 | l | 78.28 | j | 77.59 | i | 77.14 | i | 78.30 | k | 79.05 | j | 81.14 | j | 85.52 | j | 85.79 | k | 85.80 | k | 84.72 | l | 83.29 | j | ----- | z |
2011 | 82.55 | k | 83.00 | i | 83.41 | i | 83.79 | k | 83.71 | j | 83.81 | i | 84.00 | k | 85.45 | k | 85.74 | k | 85.19 | j | 83.31 | n | 81.83 | m | ----- | z |
2012 | 81.56 | m | 81.33 | q | 81.26 | l | 82.21 | k | 83.10 | j | 83.39 | l | 84.81 | j | 86.00 | k | 85.44 | l | 85.55 | k | 83.50 | l | 82.17 | m | ----- | z |
2013 | 79.68 | l | 79.20 | w | 81.09 | t | 83.59 | h | 85.41 | i | 85.33 | l | 86.41 | i | 86.45 | k | 87.20 | j | 86.00 | j | 84.71 | m | 83.89 | m | ----- | z |
2014 | 81.48 | j | 82.59 | k | 83.70 | k | 84.53 | o | 85.48 | j | 86.41 | m | 87.15 | k | 87.47 | p | 88.27 | o | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 82.02 | 82.05 | 82.83 | 83.73 | 84.98 | 86.18 | 87.31 | 88.03 | 88.06 | 87.20 | 85.37 | 82.91 | 85.05 | |||||||||||||
S.D. | 1.85 | 1.74 | 1.67 | 1.56 | 1.77 | 1.91 | 1.84 | 1.79 | 1.81 | 1.95 | 1.88 | 1.52 | 1.57 | |||||||||||||
SKEW | 1.23 | 0.54 | 1.27 | 0.37 | -0.15 | -0.19 | -0.14 | 0.12 | -0.32 | -0.23 | 0.02 | -0.09 | 0.05 | |||||||||||||
MAX | 87.57 | 85.26 | 87.13 | 87.13 | 88.03 | 89.70 | 90.68 | 91.29 | 91.03 | 90.77 | 88.43 | 85.19 | 87.85 | |||||||||||||
MIN | 79.94 | 79.96 | 80.90 | 81.03 | 81.29 | 82.67 | 84.10 | 85.16 | 84.60 | 83.48 | 82.83 | 80.67 | 82.64 | |||||||||||||
YRS | 22 | 23 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 20 | 20 |