YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1982 | ----- | z | ----- | z | ----- | z | ----- | z | 90.75 | c | 99.17 | 100.77 | a | 99.13 | 95.03 | 86.28 | b | 71.14 | b | 64.10 | 88.30 | d | ||||
1983 | 67.29 | 66.65 | e | 71.72 | b | 78.24 | a | 92.14 | b | 99.28 | a | 102.43 | a | 97.45 | 96.52 | a | 82.48 | b | 74.14 | b | 69.54 | e | 83.16 | |||
1984 | 68.04 | d | 72.64 | a | 79.90 | a | 82.34 | a | 97.40 | a | 98.90 | a | 97.25 | c | 97.18 | n | 96.67 | c | 80.17 | a | 74.07 | b | 65.44 | d | 82.98 | a |
1985 | 63.08 | f | 68.80 | c | 75.96 | d | 87.90 | a | 93.93 | a | 103.27 | 102.39 | 101.68 | 93.20 | 84.53 | a | 72.13 | 68.10 | b | 86.54 | a | |||||
1986 | 74.81 | 69.75 | 78.57 | a | 84.07 | 93.58 | 101.67 | 98.19 | 98.13 | 93.63 | 83.42 | e | 73.30 | 65.29 | 84.53 | |||||||||||
1987 | 66.23 | 67.11 | 70.87 | 85.90 | 88.97 | 101.60 | 102.26 | 98.39 | 94.40 | 89.65 | 72.30 | 62.00 | 83.31 | |||||||||||||
1988 | 64.43 | a | 71.52 | 77.60 | a | 80.67 | 90.53 | a | 101.37 | 101.48 | 98.35 | 95.73 | 88.84 | 73.90 | 65.90 | 84.19 | ||||||||||
1989 | 62.73 | a | 72.39 | 81.58 | 91.38 | a | 93.58 | 102.07 | b | 102.97 | 98.97 | 97.90 | 84.65 | 76.73 | 67.42 | 86.03 | ||||||||||
1990 | 64.61 | 65.18 | 75.61 | 83.63 | 90.35 | 103.85 | c | 98.48 | 94.84 | 96.31 | a | 91.87 | h | 77.83 | 63.61 | 83.12 | a | |||||||||
1991 | 63.68 | 73.39 | 67.84 | 81.00 | 90.90 | 96.97 | 100.29 | 99.55 | 94.07 | 89.03 | 72.73 | 63.68 | 82.76 | |||||||||||||
1992 | 61.81 | 67.48 | 71.29 | 85.27 | 91.50 | a | 99.43 | 99.97 | 97.58 | 95.87 | 89.16 | 70.73 | 62.35 | 82.70 | ||||||||||||
1993 | 64.06 | 64.74 | a | 74.20 | a | 85.17 | 93.65 | 100.90 | 100.45 | 98.52 | 94.50 | ----- | z | 69.79 | k | 65.27 | a | 84.15 | b | |||||||
1994 | 68.25 | c | 67.42 | b | 74.26 | 83.18 | b | 90.00 | b | 104.18 | b | 103.52 | 100.87 | a | 95.37 | 82.45 | 68.20 | j | ----- | z | 86.95 | b | ||||
1995 | 63.64 | c | 72.33 | d | 75.28 | f | 78.67 | c | 85.16 | f | 98.22 | c | 102.73 | a | 100.93 | d | 97.91 | g | 89.29 | j | 77.70 | g | 73.81 | o | 86.09 | f |
1996 | 71.48 | f | 72.40 | d | 76.68 | i | 86.78 | l | 95.97 | b | 102.41 | a | 100.57 | c | 98.74 | d | 90.30 | c | 87.75 | o | 80.26 | k | 69.22 | d | 89.94 | e |
1997 | 62.92 | f | 69.04 | a | 79.18 | c | 80.08 | e | 94.36 | c | 99.50 | b | 102.54 | c | 98.69 | e | 97.96 | g | 85.66 | b | 77.13 | g | 60.26 | 85.48 | c | |
1998 | 66.67 | d | 63.62 | g | 70.91 | h | 75.69 | a | 88.83 | g | 98.38 | f | 100.11 | m | 99.39 | c | 97.69 | d | 89.64 | i | 76.34 | a | 67.96 | g | 83.16 | g |
1999 | 71.68 | i | 72.30 | h | 78.54 | g | 75.86 | b | 91.84 | 99.47 | 97.21 | b | 99.03 | 96.50 | 92.42 | 83.86 | a | 67.63 | a | 89.31 | c | |||||
2000 | 72.53 | a | 74.19 | b | 73.97 | 87.17 | ----- | z | 99.86 | b | 103.16 | 98.97 | 99.30 | 81.33 | a | 65.36 | b | 69.48 | b | 84.12 | a | |||||
2001 | 62.07 | a | 66.18 | 74.47 | a | 81.70 | 96.83 | a | 102.34 | a | 99.94 | 99.03 | a | 100.37 | 89.71 | 78.10 | a | 63.31 | b | 84.50 | ||||||
2002 | 67.10 | b | 71.86 | 76.55 | b | 88.19 | c | 93.37 | a | 105.29 | b | 101.77 | a | 100.70 | a | 97.17 | a | 84.32 | 77.27 | 64.61 | c | 85.68 | ||||
2003 | 73.65 | 68.25 | 72.60 | a | 81.77 | 93.90 | a | 101.67 | 104.54 | c | 99.79 | b | 96.77 | d | 90.74 | 72.48 | a | 68.27 | a | 85.37 | ||||||
2004 | 65.87 | a | 65.57 | a | 80.63 | a | 81.14 | b | 95.03 | b | 101.38 | a | 101.36 | c | 99.03 | 94.76 | a | 83.67 | a | 68.97 | 65.58 | e | 83.58 | |||
2005 | 66.37 | a | 64.82 | 72.59 | b | 82.82 | b | 92.83 | b | 100.64 | b | 105.48 | 94.83 | a | 98.26 | c | 87.41 | b | 78.18 | b | 69.86 | b | 84.51 | |||
2006 | 69.61 | c | 73.59 | a | 73.73 | a | 84.96 | e | 95.62 | e | 103.78 | c | 101.29 | 95.76 | b | 91.58 | d | 85.34 | b | ----- | z | 64.75 | c | 85.46 | a | |
2007 | 61.00 | 70.86 | 77.86 | c | 84.11 | b | 94.52 | b | 101.71 | b | 101.03 | 97.32 | c | 96.36 | b | 88.00 | a | 81.17 | a | 61.82 | c | 84.65 | ||||
2008 | 64.13 | 67.04 | a | 76.46 | c | 84.04 | d | 89.10 | b | 103.60 | 97.65 | 99.10 | a | 97.20 | 89.73 | a | 78.03 | a | 67.14 | c | 84.44 | |||||
2009 | 69.55 | 71.50 | b | 79.71 | c | 82.33 | 96.52 | f | 97.50 | d | 103.93 | d | 102.86 | b | 98.22 | c | 85.20 | f | ----- | z | ----- | z | 88.20 | d | ||
2010 | 65.68 | c | ----- | z | 71.04 | c | 79.12 | f | 89.52 | d | 101.80 | 102.06 | 99.93 | b | 99.34 | a | 86.45 | b | 73.29 | b | 69.86 | b | 85.90 | b | ||
2011 | 64.93 | b | 67.52 | c | 80.00 | b | 84.86 | h | 89.22 | h | 104.96 | d | 103.21 | c | 103.56 | d | 99.12 | e | 87.48 | f | 72.93 | a | 59.19 | d | 83.94 | c |
2012 | 69.56 | d | 71.54 | e | 74.80 | f | 86.78 | g | 96.14 | c | ----- | z | 99.30 | d | 101.65 | 95.45 | a | 89.50 | a | 79.97 | a | 66.23 | i | 87.89 | d | |
2013 | 62.07 | c | 63.64 | c | 79.59 | b | 83.89 | c | 92.80 | a | 105.87 | 99.87 | a | 101.13 | 97.90 | a | 87.43 | q | 75.29 | b | 64.72 | b | 84.25 | a | ||
2014 | 70.79 | b | 75.04 | b | 77.30 | d | 87.52 | a | 93.39 | c | 104.80 | 102.04 | e | 96.23 | 96.03 | a | 89.07 | c | 77.17 | 66.50 | c | 86.32 | ||||
2015 | 67.84 | 75.00 | e | 79.80 | a | 84.46 | d | 87.96 | g | 103.66 | a | 99.50 | a | 103.19 | 93.21 | a | 85.87 | 72.60 | 65.62 | b | 84.61 | a | ||||
2016 | 64.39 | c | 79.96 | b | 80.62 | b | 81.78 | c | 89.52 | 102.86 | a | 101.83 | b | 96.63 | d | 93.44 | c | 92.14 | b | 78.81 | d | 66.56 | f | 87.45 | a | |
2017 | 62.70 | a | 72.33 | d | 82.22 | d | 86.26 | c | 89.82 | c | 105.14 | b | 99.30 | a | 100.17 | b | 95.52 | c | 91.03 | 82.14 | a | 71.59 | i | 87.88 | a | |
2018 | 75.00 | p | 71.15 | b | 76.10 | j | 90.31 | d | 95.65 | e | 103.92 | d | 102.10 | b | 98.17 | b | 98.42 | d | 80.07 | b | 74.24 | e | ----- | z | 90.45 | c |
2019 | ----- | z | 63.00 | d | 75.96 | h | 89.17 | f | 87.07 | c | 102.97 | a | 105.29 | 103.86 | b | 96.57 | 86.73 | a | 77.00 | d | 65.71 | c | 87.58 | c | ||
2020 | 66.64 | c | 66.16 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.40 | j |
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 96.40 | j | 87.39 | h | 84.05 | j | 74.93 | p | ----- | z |
2022 | 67.96 | f | 69.00 | j | 77.85 | e | 88.71 | p | 96.77 | e | 102.71 | i | 100.65 | h | 94.95 | k | 98.40 | e | 85.79 | g | 73.43 | b | 65.61 | c | 82.41 | g |
2023 | 64.00 | c | 66.86 | f | 72.28 | f | 85.35 | d | 92.14 | c | 99.36 | b | 107.57 | a | 101.20 | a | 97.92 | f | 91.33 | d | 78.93 | a | 70.03 | 87.77 | c | |
2024 | 64.50 | m | 67.93 | 73.03 | a | 74.50 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.48 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 66.26 | 69.67 | 76.21 | 83.54 | 92.75 | 101.77 | 101.47 | 99.30 | 96.14 | 86.81 | 75.29 | 65.68 | 84.38 | |||||||||||||
S.D. | 3.44 | 3.79 | 3.68 | 3.63 | 2.63 | 2.32 | 2.31 | 2.20 | 2.23 | 3.50 | 3.90 | 2.83 | 1.14 | |||||||||||||
SKEW | 0.73 | 0.34 | -0.28 | -0.12 | -0.10 | -0.17 | 0.24 | 0.08 | -0.45 | -0.28 | -0.05 | -0.27 | 0.12 | |||||||||||||
MAX | 74.81 | 79.96 | 82.22 | 91.38 | 97.40 | 105.87 | 107.57 | 103.86 | 100.37 | 92.42 | 83.86 | 70.03 | 86.32 | |||||||||||||
MIN | 61.00 | 63.00 | 67.84 | 75.69 | 87.07 | 96.97 | 97.21 | 94.83 | 90.30 | 80.07 | 65.36 | 59.19 | 82.70 | |||||||||||||
YRS | 33 | 36 | 32 | 33 | 34 | 37 | 38 | 38 | 37 | 31 | 33 | 32 | 15 |