YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.03 | 67.87 | 70.52 | 69.77 | 64.03 | 57.93 | 49.53 | a | 63.53 | e | ||||||
1984 | 54.29 | 56.17 | 57.74 | 55.67 | 61.03 | 63.03 | 67.74 | 69.26 | 70.00 | a | 61.03 | a | 55.87 | 48.94 | 60.06 | |||||||||||
1985 | 51.52 | 52.59 | a | 52.65 | 57.33 | 61.39 | 65.34 | a | 69.10 | 67.10 | 65.47 | 63.63 | a | 49.13 | 52.19 | 58.95 | ||||||||||
1986 | 55.94 | 54.29 | 59.84 | 57.00 | 60.42 | 66.13 | 67.16 | 66.81 | 65.00 | 62.39 | 58.23 | 53.97 | 60.60 | |||||||||||||
1987 | 52.94 | 56.14 | 57.19 | 61.13 | 63.23 | 65.57 | 65.58 | 68.23 | a | 67.57 | 67.35 | 58.27 | 49.48 | 61.06 | ||||||||||||
1988 | 51.48 | 55.10 | 56.00 | 57.67 | 60.45 | 64.10 | 68.96 | c | 68.61 | 69.67 | 65.29 | 56.40 | 52.65 | 60.53 | ||||||||||||
1989 | 50.32 | 47.78 | a | 53.74 | 61.60 | 61.03 | 64.18 | b | 67.29 | 68.94 | 70.37 | 64.03 | 58.57 | 53.68 | 60.13 | |||||||||||
1990 | 53.00 | 52.21 | 56.65 | 59.20 | 60.70 | a | 64.97 | 70.26 | 70.55 | 70.67 | 63.39 | 56.77 | 45.94 | 60.36 | ||||||||||||
1991 | 52.19 | 59.86 | 53.77 | 55.53 | 57.71 | 62.40 | 70.23 | 68.13 | 73.07 | 67.81 | 58.23 | 52.23 | a | 60.93 | ||||||||||||
1992 | 54.50 | a | 60.28 | 61.03 | 62.45 | a | 66.43 | a | 67.43 | 69.29 | 71.17 | a | 67.70 | 65.65 | 56.20 | 50.55 | 62.72 | |||||||||
1993 | 48.03 | 53.25 | 57.29 | 58.57 | 64.13 | 66.20 | 67.58 | 69.77 | a | 67.59 | c | 64.20 | a | 54.40 | 51.42 | 60.20 | ||||||||||
1994 | 55.33 | a | 52.21 | 59.06 | 58.63 | 63.03 | 64.40 | 68.42 | 71.58 | 69.70 | 63.81 | 52.13 | 52.42 | 60.89 | ||||||||||||
1995 | 53.87 | a | 57.37 | a | 56.61 | 58.07 | 61.45 | 65.48 | a | 70.48 | 70.11 | d | 72.24 | i | 66.00 | i | 60.27 | h | 54.95 | j | 61.68 | d | ||||
1996 | 53.00 | h | 55.83 | e | 58.00 | j | 59.45 | h | 60.30 | h | 66.25 | j | 69.74 | h | 70.05 | i | 70.24 | i | 64.65 | h | 58.33 | i | 54.59 | i | 55.83 | k |
1997 | 52.69 | e | 54.60 | h | 55.96 | h | 57.86 | h | 66.83 | h | 66.52 | i | 71.48 | h | 73.86 | j | 71.45 | h | 63.74 | h | 58.60 | j | 52.68 | f | 52.69 | k |
1998 | 53.68 | f | 55.20 | h | 56.73 | i | 57.95 | i | 59.60 | k | 63.10 | i | ----- | z | 71.90 | j | 70.39 | g | 65.46 | g | 56.81 | i | 50.61 | h | ----- | z |
1999 | 51.91 | i | 50.73 | f | 52.90 | b | 56.38 | a | 58.58 | 63.87 | 66.45 | 68.35 | 68.87 | 62.77 | 58.30 | 53.55 | b | 61.00 | b | |||||||
2000 | 51.80 | f | 54.50 | i | 55.11 | l | 61.60 | j | 61.65 | h | 65.68 | h | 68.62 | j | 69.57 | h | 71.43 | i | 64.05 | i | 55.30 | j | 54.81 | j | ----- | z |
2001 | 53.83 | h | 54.15 | h | 57.27 | i | 56.70 | j | 63.96 | h | 65.30 | j | 67.58 | l | 68.09 | h | 69.45 | j | 65.45 | i | 60.10 | j | 52.57 | j | ----- | z |
2002 | 52.04 | h | 56.65 | h | 55.38 | j | 58.45 | h | 59.87 | h | 66.26 | k | 70.52 | j | 71.24 | j | 71.76 | i | 63.61 | h | 61.11 | k | 55.77 | i | ----- | z |
2003 | 58.83 | h | 56.00 | h | 57.00 | j | 57.95 | j | 64.95 | j | 67.95 | k | 71.83 | h | 72.48 | j | 72.00 | k | 66.65 | h | 53.71 | m | 54.15 | k | ----- | z |
2004 | 53.67 | j | 56.50 | i | 60.48 | h | 63.86 | h | 62.95 | k | 66.68 | h | 71.91 | i | 71.57 | j | 69.35 | j | 64.29 | j | 57.15 | j | 54.75 | k | ----- | z |
2005 | 54.14 | j | 61.15 | h | 59.87 | h | 59.19 | i | 63.05 | k | 65.77 | h | 72.42 | l | 70.43 | h | 69.25 | j | 64.05 | l | 57.50 | j | 53.95 | k | ----- | z |
2006 | 55.10 | j | 55.00 | h | 53.87 | h | 60.00 | l | 64.81 | j | 67.14 | h | 70.48 | j | 68.39 | h | 71.70 | j | 65.86 | i | 56.14 | i | 54.58 | l | ----- | z |
2007 | 51.29 | n | 53.45 | h | 56.73 | i | 59.24 | i | 62.82 | i | 65.23 | h | 70.19 | j | 72.00 | h | 68.05 | i | 63.61 | h | 58.05 | j | 52.00 | l | ----- | z |
2008 | 49.29 | j | 53.67 | h | 54.10 | j | 55.50 | h | 59.35 | k | 62.52 | i | 68.22 | h | 69.05 | j | 68.50 | h | 63.48 | j | 58.75 | j | 50.43 | h | ----- | z |
2009 | 54.68 | i | 55.10 | h | 53.73 | i | 57.36 | h | 62.30 | k | 65.18 | h | 70.22 | h | 70.81 | j | 72.76 | i | 63.68 | i | 58.71 | i | 49.77 | i | ----- | z |
2010 | 56.15 | k | 56.74 | i | 57.17 | h | 56.91 | h | 59.29 | j | 63.50 | h | 66.61 | h | 69.77 | i | 70.14 | h | 66.52 | j | 55.71 | i | 53.91 | h | ----- | z |
2011 | 54.05 | j | 52.55 | h | 54.39 | h | 55.05 | i | 59.55 | i | 65.05 | h | 68.80 | k | 71.96 | h | 72.50 | h | 64.76 | j | 56.09 | h | 52.91 | i | ----- | z |
2012 | 54.32 | i | 54.05 | h | 52.64 | i | 57.90 | i | 61.13 | h | 65.29 | i | 67.50 | i | 70.04 | h | 68.00 | j | 64.30 | h | 58.57 | i | 51.82 | n | ----- | z |
2013 | 51.48 | j | 52.72 | j | 55.72 | m | 61.05 | k | 62.72 | m | 66.24 | m | 69.56 | m | 71.71 | n | 70.06 | n | 63.79 | l | 58.40 | o | 49.06 | o | ----- | z |
2014 | 55.63 | l | 55.06 | l | 60.06 | n | 61.83 | l | 67.76 | n | 67.00 | m | 72.29 | n | 72.06 | o | 73.41 | m | 67.56 | m | 60.67 | o | 56.31 | o | ----- | z |
2015 | 58.62 | o | 60.25 | l | 61.06 | m | 59.56 | l | 62.60 | p | 67.41 | m | 73.39 | m | 74.18 | n | 70.00 | m | 69.41 | n | 58.06 | n | 54.78 | m | ----- | z |
2016 | 55.62 | o | 60.06 | l | 58.53 | l | 64.86 | p | 66.06 | n | 68.39 | l | 70.67 | p | 71.67 | m | 72.31 | n | 63.18 | n | 60.76 | m | 49.00 | o | ----- | z |
2017 | 52.60 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 52.78 | 54.85 | 56.50 | 58.40 | 61.51 | 64.87 | 68.32 | 69.22 | 68.88 | 64.26 | 56.19 | 51.27 | 60.59 | |||||||||||||
S.D. | 2.14 | 3.38 | 2.65 | 2.20 | 2.29 | 1.33 | 1.48 | 1.46 | 2.19 | 1.89 | 2.82 | 2.31 | 0.91 | |||||||||||||
SKEW | -0.60 | -0.23 | 0.02 | 0.51 | 0.46 | -0.04 | -0.10 | -0.03 | -0.15 | 0.43 | -1.42 | -0.88 | 0.73 | |||||||||||||
MAX | 55.94 | 60.28 | 61.03 | 62.45 | 66.43 | 67.43 | 70.48 | 71.58 | 73.07 | 67.81 | 58.57 | 53.97 | 62.72 | |||||||||||||
MIN | 48.03 | 47.78 | 52.65 | 55.53 | 57.71 | 62.40 | 65.58 | 66.81 | 65.00 | 61.03 | 49.13 | 45.94 | 58.95 | |||||||||||||
YRS | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 11 |