YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.54 | g | ----- | z |
1988 | 64.90 | a | 73.54 | e | 78.60 | f | 84.41 | a | 95.23 | a | 105.24 | a | 105.35 | 101.73 | e | 97.41 | a | 90.87 | a | 75.48 | a | 66.77 | a | 87.36 | a | |
1989 | 63.57 | a | 73.82 | 83.65 | 94.60 | 97.67 | a | 104.17 | 107.13 | a | 102.45 | 100.83 | a | 86.90 | a | 77.57 | b | 67.25 | c | 88.30 | ||||||
1990 | 65.43 | a | 68.07 | 77.97 | a | 87.07 | a | 93.66 | b | 106.97 | 101.37 | a | 97.50 | a | 97.03 | 89.10 | b | 77.83 | a | 62.45 | b | 85.37 | ||||
1991 | 63.62 | b | 74.83 | e | 69.83 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.72 | l | 63.83 | a | 68.03 | h |
1992 | 63.42 | 69.31 | 72.14 | c | 87.97 | a | 93.44 | d | 102.73 | 104.52 | b | 101.41 | b | 99.93 | 90.20 | a | 71.66 | a | 61.43 | a | 84.85 | |||||
1993 | 64.37 | a | 66.46 | 75.93 | a | 86.73 | 96.70 | a | 104.54 | b | 103.93 | a | 100.19 | d | 98.07 | a | 88.57 | a | 72.50 | 66.52 | 85.38 | |||||
1994 | 68.90 | ----- | z | 78.76 | b | 86.90 | 93.80 | a | 107.81 | c | 107.29 | 106.17 | a | 100.00 | c | 85.10 | a | 70.83 | 64.81 | 88.22 | a | |||||
1995 | 63.52 | 73.82 | 76.19 | 83.72 | a | 90.50 | c | 102.63 | c | 107.43 | c | 105.13 | a | 100.34 | a | 92.23 | a | 79.90 | 69.11 | c | 87.04 | |||||
1996 | 70.83 | a | 73.55 | 78.14 | b | 89.07 | 99.00 | b | 106.34 | a | 106.40 | a | 104.47 | a | 94.00 | b | 87.89 | c | 77.79 | a | 69.11 | c | 88.05 | |||
1997 | 65.97 | 71.85 | a | 83.48 | 86.36 | e | 99.32 | 102.47 | 106.55 | 103.21 | c | 100.52 | a | 87.81 | 77.07 | 61.57 | a | 87.18 | ||||||||
1998 | 67.48 | 63.27 | b | 73.39 | 79.48 | a | 92.65 | 101.87 | 106.45 | 105.31 | b | 100.10 | 89.50 | a | 78.17 | a | 67.42 | 85.42 | ||||||||
1999 | 72.27 | a | 76.61 | 81.59 | b | 81.93 | b | 94.87 | 103.10 | 101.10 | a | 103.72 | b | 99.40 | 94.29 | c | 83.48 | a | 67.71 | 88.34 | ||||||
2000 | 72.33 | a | 75.75 | a | 76.90 | b | 91.66 | a | 101.20 | a | 104.64 | b | 107.30 | a | 102.67 | a | 102.62 | a | 84.45 | b | 66.27 | 69.26 | d | 87.92 | ||
2001 | 64.74 | 67.59 | a | 78.77 | 85.48 | a | 100.97 | 106.50 | 103.40 | k | 104.14 | b | 103.27 | 91.06 | 78.71 | b | 63.76 | b | 85.91 | a | ||||||
2002 | 67.48 | d | 75.00 | a | 79.82 | c | 90.83 | a | 96.72 | b | 108.31 | d | 105.79 | c | 104.93 | b | 99.71 | b | 85.31 | b | 78.28 | e | 64.50 | c | 88.06 | |
2003 | 73.37 | a | 68.93 | a | 76.34 | b | 84.60 | 96.77 | a | 104.55 | a | 107.25 | c | 102.93 | b | 100.34 | a | 93.81 | 73.17 | a | 67.97 | b | 87.50 | |||
2004 | 66.38 | b | 65.54 | c | 84.00 | b | 83.72 | a | 96.80 | a | 104.17 | 104.83 | b | 102.27 | a | 98.97 | 85.35 | 70.40 | 65.72 | b | 85.68 | |||||
2005 | 65.35 | 65.40 | c | 73.48 | b | 86.57 | 96.71 | 104.03 | a | 108.06 | 99.63 | a | 99.93 | 88.26 | 79.11 | c | 68.86 | b | 86.28 | |||||||
2006 | 70.55 | b | 74.64 | 73.94 | 86.07 | b | 98.17 | a | 105.64 | b | 104.27 | a | 99.00 | 94.33 | 86.87 | a | 79.37 | c | 65.83 | b | 86.56 | |||||
2007 | 63.27 | a | 72.59 | a | 81.39 | 86.00 | c | 96.69 | b | 104.55 | a | 104.19 | 103.71 | 98.89 | c | 90.33 | a | 81.28 | e | 61.83 | b | 87.06 | ||||
2008 | 63.77 | a | 69.41 | b | 80.96 | e | 88.81 | d | 91.94 | 106.24 | a | 102.38 | b | 100.97 | 99.20 | 89.86 | b | 77.86 | a | 63.68 | c | 86.26 | ||||
2009 | 67.79 | b | 73.11 | a | 80.24 | f | 87.50 | l | 97.89 | d | 98.69 | a | 106.29 | 104.81 | 99.34 | a | 85.87 | a | 80.84 | e | 63.48 | f | 90.51 | c | ||
2010 | 66.45 | 68.26 | a | 74.10 | b | 83.77 | 91.53 | a | 103.66 | a | 104.80 | a | 102.97 | b | 101.24 | e | 88.42 | 76.18 | b | 70.86 | b | 86.02 | ||||
2011 | 66.52 | f | 68.25 | d | 81.28 | f | 86.22 | c | 91.59 | b | 103.70 | c | 104.17 | b | 105.00 | b | 100.44 | c | 89.92 | f | 74.81 | d | 62.00 | b | 88.47 | c |
2012 | 70.28 | f | 71.88 | c | 79.00 | b | 87.62 | d | 97.59 | d | 104.85 | c | 101.04 | d | 102.54 | c | 96.82 | b | 89.53 | a | 80.21 | b | 66.90 | b | 88.91 | a |
2013 | 63.86 | c | 66.36 | 80.72 | f | 86.28 | e | 94.17 | b | 107.00 | w | 101.83 | g | 103.75 | k | 96.77 | h | 86.81 | 75.69 | d | 65.46 | g | 78.86 | f | ||
2014 | 70.48 | 75.31 | b | 78.85 | e | 85.21 | a | 92.17 | g | 103.46 | d | 103.04 | d | 98.29 | c | 95.39 | b | 88.04 | d | 76.89 | b | 65.96 | c | 85.54 | a | |
2015 | 65.86 | b | 74.33 | d | 81.83 | g | 83.83 | 86.67 | d | 102.50 | h | 99.78 | d | 103.48 | b | 97.64 | b | 86.38 | e | 74.00 | e | 64.95 | i | 85.78 | c | |
2016 | 64.50 | k | 79.12 | e | 82.74 | d | 86.07 | c | 92.39 | c | 106.32 | e | 105.50 | e | 99.92 | e | 97.26 | c | 93.70 | d | 78.04 | f | 68.59 | d | 91.16 | b |
2017 | 63.88 | e | 73.76 | c | 84.93 | a | 87.52 | e | 93.03 | a | 106.28 | a | 103.31 | b | 102.87 | 97.93 | b | 93.82 | c | 82.71 | b | 70.63 | a | 88.39 | ||
2018 | 74.43 | a | 71.48 | a | 78.34 | b | 89.78 | l | 96.54 | g | 104.43 | g | 104.62 | b | 101.83 | b | 100.36 | b | 83.16 | 74.32 | b | 64.55 | b | 83.68 | c | |
2019 | 64.96 | d | 63.59 | a | 77.81 | d | 88.04 | d | 87.71 | c | 102.23 | d | 105.34 | b | 104.85 | d | 98.19 | d | 88.56 | d | 78.17 | a | 63.87 | 85.28 | ||
2020 | 66.38 | b | 70.68 | d | 75.74 | d | 85.70 | c | 98.88 | g | 103.40 | e | 107.04 | d | 107.97 | b | 102.15 | d | 95.21 | b | 82.18 | b | 68.45 | b | 87.72 | a |
2021 | 68.19 | d | 73.07 | 77.03 | a | 88.59 | a | 95.31 | b | 106.00 | a | 100.16 | 99.28 | b | 97.43 | 87.78 | d | 82.37 | 68.83 | b | 87.00 | |||||
2022 | 67.46 | c | 71.57 | 78.82 | c | 89.38 | a | 95.56 | d | 104.68 | e | 104.74 | 99.76 | b | 101.28 | e | 87.79 | b | 71.93 | c | 62.67 | a | 86.30 | |||
2023 | 64.71 | 68.36 | 72.71 | 87.30 | 94.43 | a | 99.86 | a | 109.65 | 105.57 | a | 101.10 | 93.00 | 79.73 | 70.23 | 87.22 | ||||||||||
2024 | 65.77 | 70.34 | 75.00 | 85.84 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.24 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 66.82 | 71.10 | 77.87 | 86.57 | 95.02 | 104.36 | 104.88 | 102.67 | 99.16 | 88.99 | 76.96 | 66.15 | 86.76 | |||||||||||||
S.D. | 3.14 | 3.83 | 3.75 | 2.78 | 3.40 | 2.10 | 2.38 | 2.46 | 2.16 | 3.06 | 3.97 | 2.83 | 1.11 | |||||||||||||
SKEW | 0.91 | -0.24 | 0.01 | 0.32 | -0.43 | -0.55 | -0.43 | -0.21 | -0.52 | 0.32 | -0.59 | -0.12 | -0.05 | |||||||||||||
MAX | 74.43 | 79.12 | 84.93 | 94.60 | 101.20 | 108.31 | 109.65 | 107.97 | 103.27 | 95.21 | 83.48 | 70.86 | 88.39 | |||||||||||||
MIN | 63.27 | 63.27 | 69.83 | 79.48 | 86.67 | 98.69 | 99.78 | 97.50 | 94.00 | 83.16 | 66.27 | 61.43 | 84.85 | |||||||||||||
YRS | 34 | 36 | 32 | 34 | 32 | 32 | 33 | 34 | 34 | 34 | 34 | 33 | 23 |