YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1981 | ----- | z | 76.15 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.15 | k |
1982 | 75.95 | 75.13 | e | 75.42 | 76.73 | 79.39 | c | 80.72 | 82.31 | 83.93 | a | 82.36 | a | 80.98 | 79.20 | 75.84 | 79.00 | |||||||||
1983 | 75.48 | 75.64 | 77.34 | 78.12 | 78.61 | 79.95 | 80.69 | 81.63 | 81.82 | 80.94 | 78.88 | 76.42 | 78.79 | |||||||||||||
1984 | 77.50 | a | 75.95 | 77.22 | a | 77.38 | 78.37 | 79.12 | 80.19 | 80.10 | a | 80.63 | 80.52 | c | 78.80 | 75.11 | 78.41 | |||||||||
1985 | 73.37 | 74.34 | 74.58 | 75.34 | e | 79.58 | 79.45 | 80.89 | 81.03 | 81.67 | 80.24 | 78.00 | ----- | z | 78.04 | a | ||||||||||
1986 | 75.32 | 76.18 | 79.27 | 78.57 | 80.52 | 81.52 | 82.74 | 83.69 | 83.03 | 82.52 | a | 80.22 | 76.10 | 79.97 | ||||||||||||
1987 | 74.97 | 74.16 | 75.66 | 76.43 | 76.88 | a | 80.57 | 81.81 | 82.23 | 83.55 | 81.69 | 79.40 | 76.79 | 78.68 | ||||||||||||
1988 | 75.11 | 76.29 | 76.74 | 77.70 | 79.27 | 79.77 | 80.24 | 80.78 | d | 80.88 | 80.35 | 80.12 | 76.95 | 78.68 | ||||||||||||
1989 | 75.60 | 74.48 | 76.08 | 76.57 | 78.87 | 80.08 | 80.40 | 80.81 | 80.28 | 80.69 | 78.45 | 75.31 | 78.14 | |||||||||||||
1990 | 74.00 | 73.43 | 74.10 | 77.03 | 78.15 | 79.20 | 80.82 | 81.61 | 81.52 | 80.42 | 78.08 | 74.93 | a | 77.77 | ||||||||||||
1991 | 73.94 | 75.38 | 75.24 | 76.41 | g | 77.15 | 78.00 | 79.44 | 80.58 | 80.37 | 78.71 | 78.12 | 75.74 | b | 77.51 | a | ||||||||||
1992 | 73.05 | a | 73.41 | 74.87 | 76.52 | 77.85 | 79.55 | 80.52 | 80.89 | 80.88 | b | 80.65 | a | 77.50 | c | 76.08 | 77.65 | |||||||||
1993 | 72.25 | a | 72.48 | 74.25 | a | 76.42 | 76.79 | 79.05 | 79.62 | c | 80.52 | 80.98 | 79.71 | 76.55 | 74.60 | 76.94 | ||||||||||
1994 | 73.06 | 74.04 | 75.08 | 76.20 | 78.00 | 78.48 | 80.26 | 81.11 | 81.35 | 79.89 | 77.62 | 74.23 | a | 77.44 | ||||||||||||
1995 | 73.12 | a | 73.15 | a | 75.85 | 76.21 | b | 77.73 | 78.79 | a | 80.47 | a | 80.35 | a | 80.47 | 79.24 | 78.83 | 76.37 | a | 77.55 | ||||||
1996 | 75.77 | 74.19 | 74.17 | a | 77.78 | 79.56 | 80.27 | 81.15 | 80.48 | 80.30 | 80.05 | 78.08 | 74.15 | a | 78.00 | |||||||||||
1997 | 73.58 | a | 74.86 | 74.76 | 76.67 | 78.02 | 79.42 | 80.06 | 80.35 | 80.92 | 79.35 | 76.98 | 74.13 | 77.43 | ||||||||||||
1998 | 73.05 | 73.46 | 74.66 | 75.53 | 74.98 | 76.73 | 78.21 | 79.29 | 78.68 | 77.97 | 76.58 | 74.08 | 76.10 | |||||||||||||
1999 | 73.19 | 72.89 | 74.23 | 74.62 | 77.02 | 76.87 | 77.77 | 78.21 | 77.83 | 76.73 | 75.98 | 74.07 | a | 75.78 | ||||||||||||
2000 | 72.60 | 72.78 | 74.68 | 74.50 | 77.18 | 78.07 | 79.34 | 79.90 | 79.19 | a | 78.73 | 75.88 | a | 73.85 | 76.39 | |||||||||||
2001 | 74.05 | 73.48 | a | 73.98 | a | 75.00 | 76.35 | 77.33 | a | 78.33 | a | 79.81 | 79.42 | 78.35 | 76.38 | 74.61 | 76.43 | |||||||||
2002 | 73.71 | 72.91 | 74.27 | 76.88 | 77.37 | 78.37 | 79.60 | 79.67 | a | 78.57 | a | 77.74 | 76.47 | a | 74.84 | 76.70 | ||||||||||
2003 | 73.56 | 73.07 | 74.81 | 75.85 | 77.11 | 77.90 | 78.91 | i | 80.65 | k | 76.38 | v | 78.91 | n | 76.72 | l | 75.55 | i | 75.38 | f | ||||||
2004 | 73.95 | k | 76.03 | j | 75.41 | i | 76.22 | j | 77.88 | k | 78.68 | p | 79.05 | k | 80.26 | l | 79.90 | j | 79.17 | k | 77.78 | l | 75.40 | p | ----- | z |
2005 | 73.83 | k | 73.47 | j | 75.45 | k | 77.60 | i | 77.88 | j | 78.67 | i | 79.35 | k | 80.14 | i | 80.12 | i | 77.81 | j | 76.65 | j | 74.98 | j | ----- | z |
2006 | 73.80 | k | 72.84 | i | 74.30 | i | 74.87 | k | 75.34 | i | 77.71 | i | 78.17 | k | 79.86 | i | 78.90 | j | 78.41 | i | 77.03 | k | 73.35 | k | ----- | z |
2007 | 72.00 | j | 70.79 | i | 72.43 | j | 73.03 | j | 73.93 | i | 75.39 | k | 75.74 | j | 75.93 | i | 75.95 | k | 75.26 | h | 73.22 | j | 71.20 | k | ----- | z |
2008 | 69.21 | j | 69.80 | i | 71.71 | l | 72.41 | h | 72.45 | k | 73.67 | j | 74.93 | i | 74.78 | k | 74.21 | i | 74.32 | i | 72.50 | o | 71.05 | j | ----- | z |
2009 | 69.08 | k | 69.89 | i | 68.71 | l | 70.60 | i | 73.42 | k | 75.24 | i | 75.30 | i | 76.22 | m | 75.48 | i | 75.62 | j | 72.83 | l | 70.84 | i | ----- | z |
2010 | 70.89 | l | 70.67 | j | 70.50 | i | 71.05 | i | 72.83 | k | 73.10 | j | 74.83 | j | 78.81 | j | 79.05 | k | 79.30 | k | 77.89 | l | 76.17 | j | ----- | z |
2011 | 74.60 | k | 75.79 | i | 76.68 | i | 77.24 | k | 77.88 | j | 78.38 | i | 77.90 | k | 79.30 | k | 79.26 | k | 78.50 | j | 76.91 | n | 74.81 | m | ----- | z |
2012 | 74.08 | m | 74.04 | q | 74.82 | l | 75.84 | k | 76.50 | j | 77.64 | l | 78.40 | j | 79.40 | k | 78.81 | l | 79.35 | k | 76.61 | l | 75.17 | m | ----- | z |
2013 | 73.18 | l | 72.80 | w | 74.59 | t | 76.57 | h | 78.86 | i | 79.28 | l | 80.30 | i | 80.55 | k | 80.70 | j | 79.67 | j | 77.88 | m | 76.67 | m | ----- | z |
2014 | 74.19 | j | 75.65 | k | 76.33 | k | 77.80 | o | 78.95 | j | 79.35 | m | 80.70 | k | 81.07 | p | 81.50 | o | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 74.19 | 74.25 | 75.33 | 76.48 | 77.94 | 79.05 | 80.23 | 80.81 | 80.70 | 79.78 | 77.91 | 75.21 | 77.68 | |||||||||||||
S.D. | 1.33 | 1.22 | 1.32 | 1.09 | 1.28 | 1.25 | 1.25 | 1.32 | 1.43 | 1.39 | 1.30 | 1.00 | 1.11 | |||||||||||||
SKEW | 0.71 | 0.34 | 1.45 | -0.06 | -0.07 | -0.13 | -0.04 | 0.75 | -0.06 | -0.30 | 0.07 | 0.26 | 0.10 | |||||||||||||
MAX | 77.50 | 76.29 | 79.27 | 78.57 | 80.52 | 81.52 | 82.74 | 83.93 | 83.55 | 82.52 | 80.22 | 76.95 | 79.97 | |||||||||||||
MIN | 72.25 | 72.48 | 73.98 | 74.50 | 74.98 | 76.73 | 77.77 | 78.21 | 77.83 | 76.73 | 75.88 | 73.85 | 75.78 | |||||||||||||
YRS | 22 | 23 | 22 | 21 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 20 | 19 |