YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1977 | ----- | z | 77.68 | 74.55 | 89.83 | 87.65 | 106.27 | 109.03 | 105.35 | 100.23 | 93.16 | 81.58 | k | 77.15 | r | 93.75 | c | |||||||||
1978 | 65.37 | l | 71.18 | 80.19 | 82.09 | g | 96.11 | c | 108.17 | 110.61 | 106.77 | 99.63 | 94.19 | 73.77 | 63.06 | 90.37 | b | |||||||||
1979 | 60.29 | 70.61 | 76.74 | 87.17 | 93.81 | 105.80 | 108.52 | 103.73 | a | 106.30 | 92.10 | 74.90 | 71.06 | 87.59 | ||||||||||||
1980 | ----- | z | 73.62 | 74.94 | 86.20 | 88.74 | 105.17 | 111.00 | 107.39 | 101.87 | 91.23 | 78.67 | 74.87 | 90.33 | a | |||||||||||
1981 | 72.74 | 75.32 | 77.65 | 90.63 | 94.39 | 109.23 | 109.42 | 109.71 | 103.07 | 86.13 | 80.17 | 71.42 | 89.99 | |||||||||||||
1982 | 67.03 | 74.85 | a | 75.77 | 85.67 | 94.39 | 101.07 | a | 107.16 | 106.26 | 98.79 | a | 86.48 | 72.66 | a | 64.13 | a | 86.19 | ||||||||
1983 | 69.80 | a | 71.82 | 75.87 | 80.83 | 95.55 | 102.67 | 108.87 | 103.28 | b | 101.38 | a | 89.26 | 76.77 | 68.77 | 87.07 | ||||||||||
1984 | 70.45 | 73.62 | 80.22 | m | 85.63 | c | 101.65 | 101.70 | 104.14 | b | 104.03 | 102.41 | a | 83.77 | 73.63 | 62.54 | c | 87.60 | a | |||||||
1985 | 64.83 | b | 69.75 | 76.00 | 89.97 | 95.97 | 106.63 | 107.96 | c | 107.55 | 93.64 | b | ----- | z | 71.87 | 67.61 | 86.53 | a | ||||||||
1986 | 73.43 | a | 74.57 | 82.90 | ----- | z | 95.68 | 105.90 | 105.41 | b | 106.81 | 93.63 | 86.19 | 76.77 | 66.52 | 87.98 | a | |||||||||
1987 | 65.61 | 71.68 | 76.24 | b | 91.83 | a | ----- | z | 105.83 | 105.97 | 105.45 | 100.67 | 92.23 | a | 73.20 | ----- | z | 88.87 | b | |||||||
1988 | 65.30 | a | 74.03 | 80.48 | 84.93 | a | 94.55 | 103.63 | 107.94 | 104.59 | b | 99.63 | 94.48 | 77.10 | a | 66.83 | b | 87.79 | ||||||||
1989 | 64.42 | 71.61 | 83.80 | a | 94.03 | 95.27 | a | 104.72 | a | 110.53 | a | 104.29 | 101.60 | 89.33 | a | 78.83 | 69.35 | 88.98 | ||||||||
1990 | 66.43 | c | 70.67 | a | 80.63 | a | 87.90 | 92.97 | a | 105.60 | 106.94 | 103.71 | 99.59 | a | 90.58 | 77.40 | 62.87 | 87.11 | ||||||||
1991 | 65.62 | b | 78.59 | a | 71.80 | a | 85.57 | 91.32 | 99.70 | 106.16 | 105.32 | 101.27 | 93.70 | a | 76.53 | 66.61 | 86.85 | |||||||||
1992 | 66.83 | a | 73.43 | a | 75.37 | a | 89.73 | 96.06 | 101.67 | 106.10 | 106.27 | a | 103.55 | a | 91.10 | 73.28 | a | 60.58 | 87.00 | |||||||
1993 | 63.70 | a | 67.89 | a | 80.90 | 89.00 | 95.90 | 103.23 | 106.07 | a | 105.37 | a | 102.13 | 89.71 | 72.97 | a | 67.03 | b | 86.99 | |||||||
1994 | 71.63 | a | 71.96 | 81.03 | 86.70 | 92.29 | c | 108.30 | 108.65 | 109.07 | c | 102.67 | 87.52 | 69.17 | 64.97 | a | 87.83 | |||||||||
1995 | 65.13 | 76.68 | 77.35 | 84.14 | a | 88.90 | a | 101.53 | 108.81 | 109.48 | 103.24 | a | 91.93 | a | 81.97 | a | 70.17 | a | 88.28 | |||||||
1996 | 71.03 | 75.59 | 80.87 | a | 90.07 | 97.17 | a | 106.47 | 109.48 | 108.27 | a | 98.38 | a | 89.57 | a | 77.50 | 68.63 | a | 89.42 | |||||||
1997 | 67.61 | 71.79 | 85.48 | 85.60 | 100.87 | 101.13 | 106.81 | 108.19 | 101.62 | a | 88.27 | a | 77.07 | 64.38 | b | 88.24 | ||||||||||
1998 | 67.57 | a | 67.37 | a | 76.07 | b | 81.72 | a | 88.52 | b | 99.40 | 109.90 | a | 109.26 | 99.30 | 87.40 | a | 76.03 | 67.37 | a | 85.83 | |||||
1999 | 70.87 | 74.11 | a | 78.87 | 79.89 | b | 94.16 | 102.03 | 105.32 | 107.07 | b | 102.31 | a | 94.90 | 81.31 | a | 69.41 | b | 88.36 | |||||||
2000 | 71.26 | 73.18 | a | 79.03 | 92.73 | 100.40 | a | 106.41 | a | 109.24 | b | 107.45 | b | 102.50 | 87.30 | a | ----- | z | 70.66 | b | 90.92 | a | ||||
2001 | 65.33 | a | 69.93 | 80.62 | b | 86.25 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 79.17 | a | 65.18 | c | 74.41 | f | |
2002 | 67.26 | 74.86 | 77.70 | a | 89.07 | ----- | z | 107.31 | a | 108.74 | 107.68 | 102.04 | b | 87.06 | 78.39 | b | 66.57 | a | 87.88 | a | ||||||
2003 | 75.00 | 69.64 | 78.45 | 81.27 | 94.94 | 104.59 | a | 109.65 | 106.97 | 104.10 | a | 99.08 | r | ----- | z | 62.68 | l | 91.62 | c | |||||||
2004 | 67.16 | ----- | z | ----- | z | ----- | z | 87.13 | p | 104.50 | 108.03 | 106.06 | 100.30 | 86.42 | 69.87 | 65.62 | b | 88.50 | d | |||||||
2005 | 66.87 | 68.07 | a | 76.97 | ----- | z | 98.85 | e | 103.53 | 111.81 | 106.58 | 102.00 | 88.90 | 78.17 | 68.97 | 88.25 | a | |||||||||
2006 | 71.66 | b | 78.12 | b | 72.32 | 84.97 | ----- | z | 108.10 | ----- | z | 106.90 | ----- | z | ----- | z | ----- | z | 66.35 | 84.06 | e | |||||
2007 | ----- | z | ----- | z | 82.06 | ----- | z | 95.77 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 88.92 | j | ||
2008 | 63.00 | 70.34 | 80.45 | 87.73 | 92.65 | e | 107.23 | ----- | z | 106.10 | ----- | z | 92.86 | x | 81.50 | f | 71.90 | u | 86.79 | e | ||||||
2009 | ----- | z | ----- | z | ----- | z | 89.20 | t | 101.86 | j | 95.00 | y | 113.44 | v | ----- | z | 103.90 | 88.34 | b | 79.07 | 64.17 | a | 83.87 | h | ||
2010 | 67.70 | a | 69.93 | 76.48 | 81.96 | g | 91.14 | i | 103.17 | 108.97 | 107.10 | 103.70 | 87.71 | 75.60 | 68.23 | 86.86 | b | |||||||||
2011 | 67.80 | a | 66.86 | 78.55 | b | 87.10 | a | 91.06 | 103.13 | 106.19 | 110.58 | 102.57 | 91.00 | 73.77 | 63.65 | 86.86 | ||||||||||
2012 | 71.00 | 73.31 | 78.61 | 87.83 | 98.71 | 106.17 | 104.19 | 105.97 | 101.70 | 90.97 | a | 80.43 | 66.29 | 88.77 | ||||||||||||
2013 | 65.16 | 69.96 | 83.80 | a | 89.00 | 98.81 | j | 108.88 | m | 109.60 | u | 108.08 | s | 104.55 | s | 87.13 | p | 79.00 | m | 70.42 | s | 76.98 | h | |||
2014 | 77.00 | r | 80.80 | m | 87.27 | t | 92.62 | q | 102.75 | w | 107.53 | m | 110.67 | m | ----- | z | 108.00 | x | 95.38 | w | 81.38 | q | 68.19 | o | ----- | z |
2015 | 72.91 | t | 81.85 | o | 88.60 | u | 89.50 | r | 92.64 | t | ----- | z | ----- | z | ----- | z | 104.75 | r | 92.43 | q | 81.27 | s | 67.00 | r | ----- | z |
2016 | 67.09 | t | 80.62 | u | 81.60 | u | 91.83 | x | 95.57 | q | 108.00 | q | 111.71 | x | 112.67 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | 82.67 | y | ----- | z | ----- | z | 97.77 | i | 110.69 | a | 110.97 | 110.19 | 100.10 | 94.45 | 81.23 | 72.58 | 97.17 | e | ||||||
2018 | 75.32 | 76.05 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.32 | k | |
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 |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 68.03 | 72.43 | 78.49 | 87.10 | 94.63 | 104.73 | 108.08 | 106.73 | 101.21 | 89.85 | 76.36 | 67.08 | 87.73 | |||||||||||||
S.D. | 3.55 | 3.04 | 3.21 | 3.43 | 3.61 | 2.77 | 2.02 | 1.90 | 2.59 | 2.93 | 3.32 | 3.18 | 1.11 | |||||||||||||
SKEW | 0.24 | 0.17 | 0.08 | -0.23 | -0.09 | -0.02 | -0.21 | 0.15 | -1.26 | 0.07 | -0.30 | 0.27 | 0.30 | |||||||||||||
MAX | 75.32 | 78.59 | 85.48 | 94.03 | 101.65 | 110.69 | 111.81 | 110.58 | 106.30 | 94.90 | 81.97 | 74.87 | 89.99 | |||||||||||||
MIN | 60.29 | 66.86 | 71.80 | 79.89 | 87.65 | 99.40 | 104.14 | 103.28 | 93.63 | 83.77 | 69.17 | 60.58 | 85.83 | |||||||||||||
YRS | 33 | 34 | 34 | 30 | 29 | 34 | 32 | 34 | 33 | 31 | 31 | 32 | 18 |