YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.62 | i | 70.29 | 70.29 | k | |
1978 | 62.94 | 68.39 | 77.19 | 81.50 | 93.58 | 108.77 | 111.94 | 109.07 | c | 99.77 | 93.32 | 71.86 | a | 59.74 | 86.51 | |||||||||||
1979 | 54.97 | 66.71 | 73.29 | 85.69 | a | 94.26 | 106.07 | 109.97 | a | 105.67 | a | 106.43 | 92.48 | 72.23 | 67.39 | 86.26 | ||||||||||
1980 | 64.52 | 70.24 | 72.23 | 83.34 | a | 88.84 | 104.57 | 111.90 | a | 109.03 | a | 102.17 | 90.84 | 77.33 | 72.41 | b | 87.28 | |||||||||
1981 | 70.27 | a | 72.00 | 74.68 | 89.60 | 94.65 | 109.60 | 112.23 | 111.32 | 103.00 | 85.45 | 78.23 | 67.97 | a | 89.08 | |||||||||||
1982 | 63.58 | 73.60 | c | 75.24 | b | 86.23 | d | 96.07 | b | 104.70 | c | 110.15 | e | 109.56 | d | 101.56 | c | 85.92 | e | 72.12 | e | 62.78 | d | 86.79 | ||
1983 | 68.18 | c | 70.83 | d | 76.96 | d | 81.46 | f | 97.90 | b | 105.07 | c | 110.46 | c | 106.41 | d | 103.68 | h | 89.07 | c | 73.76 | e | 66.30 | d | 86.49 | b |
1984 | 67.32 | c | 72.29 | a | 83.26 | 87.47 | 105.94 | 106.83 | 110.94 | 108.71 | 105.37 | c | 85.71 | 73.47 | 61.16 | 89.04 | ||||||||||
1985 | 63.27 | a | 70.81 | b | 77.77 | a | 93.40 | 99.16 | 110.69 | a | 113.71 | 111.71 | 97.53 | 88.68 | 72.78 | c | 67.43 | c | 88.91 | |||||||
1986 | 72.87 | 73.68 | 84.27 | a | 88.61 | b | 98.61 | 109.73 | 108.06 | 109.52 | 95.80 | 87.11 | c | 76.00 | 63.86 | c | 89.01 | |||||||||
1987 | 63.20 | a | 70.57 | 76.29 | 93.50 | 96.13 | 109.03 | 109.74 | 109.03 | 103.52 | a | 92.97 | a | 72.73 | 60.35 | 88.09 | ||||||||||
1988 | 63.83 | a | 72.89 | a | 80.34 | b | 86.10 | 97.81 | 108.23 | 113.94 | 108.40 | a | 102.67 | 97.03 | 76.83 | 66.10 | 89.51 | |||||||||
1989 | 62.74 | 71.32 | 86.16 | 96.00 | 99.39 | 108.23 | 115.06 | 108.81 | 103.47 | 90.10 | 78.07 | 68.32 | 90.64 | |||||||||||||
1990 | 64.71 | 69.25 | 81.57 | a | 90.47 | 95.77 | 109.20 | 110.97 | a | 106.84 | 102.77 | 92.19 | 76.00 | 61.00 | 88.39 | |||||||||||
1991 | 63.58 | 77.21 | 70.97 | 85.80 | 93.55 | 102.21 | a | 111.10 | 108.33 | a | 102.53 | 93.77 | 74.27 | 63.77 | 87.26 | |||||||||||
1992 | 63.32 | 71.28 | 74.37 | a | 90.73 | 99.39 | c | 106.37 | 110.68 | 110.74 | 104.97 | 91.94 | 71.20 | 59.13 | a | 87.84 | ||||||||||
1993 | 61.35 | 66.68 | 78.94 | 89.30 | 98.77 | 106.07 | 109.55 | 109.32 | 103.63 | 90.23 | 72.10 | 65.68 | 87.63 | |||||||||||||
1994 | 69.39 | 66.50 | 82.84 | 88.50 | 96.81 | 113.23 | 113.84 | 113.97 | 105.47 | 89.23 | 68.97 | 64.97 | 89.47 | |||||||||||||
1995 | 63.39 | 76.70 | a | 76.23 | 86.67 | 92.97 | 104.60 | 113.19 | 114.00 | 106.53 | 94.06 | 82.17 | 67.22 | d | 89.81 | |||||||||||
1996 | 70.39 | 75.45 | 82.61 | 92.27 | 101.23 | 110.87 | 115.10 | a | 113.26 | 102.10 | 92.55 | 76.90 | 66.90 | 91.63 | ||||||||||||
1997 | 65.77 | 71.29 | 85.74 | 88.03 | 103.81 | 105.87 | 110.68 | 111.23 | a | 102.80 | 89.94 | 76.60 | 63.42 | 89.60 | ||||||||||||
1998 | 67.61 | 66.04 | 77.23 | 82.43 | 91.35 | 103.23 | 114.00 | 112.45 | 102.76 | a | 88.45 | 76.27 | 67.03 | 87.40 | ||||||||||||
1999 | 70.10 | 73.52 | a | 82.27 | a | 82.93 | 96.87 | 106.48 | a | 108.52 | 110.63 | a | 104.27 | 95.13 | a | 80.07 | 69.87 | 90.05 | ||||||||
2000 | 68.86 | c | 73.81 | b | 77.73 | a | 94.11 | b | 103.42 | 109.73 | 112.37 | a | 109.87 | 104.47 | 87.97 | b | 69.96 | b | 69.69 | b | 90.17 | |||||
2001 | 64.07 | a | 68.78 | a | 79.35 | 87.45 | a | 104.97 | a | 111.00 | 111.13 | 111.70 | a | 106.90 | a | 92.58 | e | 78.34 | a | 63.03 | 89.94 | |||||
2002 | 65.62 | g | 73.21 | 78.70 | a | 92.57 | 98.84 | 111.54 | f | 115.10 | 111.23 | 105.13 | 88.00 | 76.43 | 65.33 | a | 90.45 | b | ||||||||
2003 | 73.77 | 68.78 | a | 77.87 | a | 82.85 | c | 99.33 | a | 105.86 | p | 114.87 | 110.77 | 107.52 | a | 99.65 | h | 70.73 | h | 67.32 | i | 91.97 | d | |||
2004 | 66.00 | b | 67.10 | i | 91.36 | i | 89.43 | g | 100.88 | o | 109.75 | j | 113.83 | y | 108.19 | e | 102.61 | g | 86.00 | d | 70.23 | d | 63.67 | d | 78.82 | g |
2005 | 63.46 | e | 67.41 | f | 72.00 | q | 88.52 | e | 98.08 | g | 103.79 | k | 114.33 | g | 108.89 | d | 102.50 | 91.24 | b | 79.90 | 67.71 | 86.03 | e | |||
2006 | 68.60 | a | 74.15 | b | 74.33 | a | 89.12 | d | 103.06 | 111.14 | a | 113.30 | a | 109.68 | 101.28 | a | 89.65 | h | 79.04 | f | 65.68 | 91.03 | b | |||
2007 | 63.97 | 74.52 | a | 84.83 | a | 90.69 | a | 100.67 | a | 109.76 | a | 113.13 | 112.32 | 104.13 | 90.39 | 79.97 | 65.52 | 90.82 | ||||||||
2008 | 65.35 | 72.74 | b | 84.00 | f | 89.48 | g | 94.74 | 110.77 | 113.13 | 110.62 | b | 105.55 | a | 93.03 | b | 79.87 | 64.84 | 91.06 | b | ||||||
2009 | 68.47 | a | 68.89 | 80.26 | 88.60 | 103.39 | 102.77 | 114.33 | a | 112.03 | a | 106.96 | b | 87.27 | a | 79.07 | c | 61.44 | d | 89.46 | ||||||
2010 | 65.00 | d | 69.00 | b | 76.29 | 85.96 | d | 91.74 | 106.77 | 113.50 | c | 110.10 | a | 106.73 | 88.11 | d | 74.15 | d | 67.26 | d | 87.88 | |||||
2011 | 64.74 | h | 67.58 | d | 79.86 | c | 89.07 | b | 94.28 | b | 106.69 | a | 110.72 | b | 113.28 | f | 104.67 | c | 92.62 | j | 72.93 | 63.00 | d | 87.64 | c | |
2012 | 69.86 | b | 72.81 | b | 81.86 | c | 91.48 | a | 101.68 | c | 109.65 | g | 109.78 | d | 111.41 | d | 105.19 | c | 90.44 | d | 77.95 | k | 64.92 | f | 92.72 | c |
2013 | 63.08 | g | 69.94 | j | 85.39 | c | 92.04 | d | 100.42 | e | 111.96 | c | 112.78 | d | 109.44 | d | 99.57 | g | 87.36 | i | 78.79 | p | 65.59 | i | 102.01 | f |
2014 | 70.38 | j | 81.78 | j | 82.56 | m | 92.59 | h | 100.31 | o | 109.25 | n | 112.55 | k | 107.40 | k | 103.50 | l | 93.16 | l | 81.19 | n | 66.85 | r | ----- | z |
2015 | 69.35 | h | 76.94 | l | 86.08 | e | 89.04 | c | 93.74 | d | 110.68 | e | 108.89 | c | 112.59 | b | 106.00 | d | 92.76 | f | 74.45 | h | 63.00 | h | 101.00 | e |
2016 | 63.29 | 77.67 | b | 82.90 | 85.20 | 92.87 | 110.57 | 111.84 | 107.52 | 99.80 | 93.63 | a | 77.73 | 63.52 | 88.88 | |||||||||||
2017 | 63.00 | g | 72.39 | 84.68 | 91.30 | 96.16 | 111.33 | 112.29 | 109.52 | 99.93 | a | 90.35 | 80.67 | o | 68.71 | 93.67 | b | |||||||||
2018 | 70.73 | p | 70.43 | 77.48 | 92.53 | 100.54 | r | 108.89 | u | 116.80 | u | 111.62 | w | 108.71 | w | 86.62 | w | ----- | z | ----- | z | 80.15 | i | |||
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 | 86.11 | c | 80.78 | c | 71.47 | n | 83.44 | j |
2022 | 66.45 | b | 70.50 | 79.55 | 89.30 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.20 | a | 73.80 | g | |||
2023 | 60.19 | 67.79 | 68.19 | 84.60 | 93.45 | 98.27 | 114.26 | 106.68 | 100.67 | 90.03 | 74.97 | 67.23 | 85.53 | |||||||||||||
2024 | 63.16 | 67.03 | 73.68 | 79.61 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.96 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 65.62 | 71.21 | 78.99 | 88.54 | 97.52 | 107.75 | 112.03 | 110.01 | 103.42 | 90.31 | 75.55 | 65.34 | 88.68 | |||||||||||||
S.D. | 3.69 | 3.05 | 4.46 | 3.52 | 4.13 | 3.28 | 1.96 | 2.02 | 2.67 | 2.91 | 3.43 | 3.10 | 1.49 | |||||||||||||
SKEW | -0.08 | 0.18 | -0.20 | -0.09 | 0.16 | -0.71 | -0.14 | -0.02 | -0.77 | 0.11 | -0.03 | -0.03 | -0.19 | |||||||||||||
MAX | 73.77 | 77.67 | 86.16 | 96.00 | 105.94 | 113.23 | 115.10 | 114.00 | 107.52 | 97.03 | 82.17 | 72.41 | 91.63 | |||||||||||||
MIN | 54.97 | 66.04 | 68.19 | 81.50 | 88.84 | 98.27 | 108.06 | 105.67 | 95.80 | 85.45 | 68.97 | 59.13 | 85.53 | |||||||||||||
YRS | 37 | 39 | 40 | 39 | 38 | 35 | 38 | 39 | 37 | 36 | 35 | 38 | 28 |