YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1987 | ----- | z | ----- | z | ----- | z | ----- | z | 92.83 | b | 104.07 | a | 104.81 | d | 101.97 | a | 97.24 | e | 91.24 | b | 71.81 | d | 62.50 | g | 94.85 | e |
1988 | 63.92 | e | 73.16 | d | 78.33 | j | 83.07 | c | 94.27 | i | 104.38 | f | 105.37 | d | 102.37 | d | 97.39 | b | 92.75 | c | 75.52 | g | 65.81 | e | 85.48 | d |
1989 | 65.04 | e | 72.08 | c | 82.52 | d | 92.13 | 95.52 | 102.70 | 106.84 | 103.00 | a | 100.86 | a | 87.90 | a | 78.10 | 69.03 | b | 87.98 | ||||||
1990 | 67.13 | a | 67.59 | a | 77.10 | 86.54 | b | 91.39 | 105.69 | a | 102.90 | a | 100.07 | a | 97.39 | b | 90.37 | a | 77.40 | 62.43 | a | 85.50 | ||||
1991 | 64.81 | 76.18 | 68.03 | 81.86 | a | 91.32 | 98.50 | 104.23 | 103.83 | b | 97.70 | 90.68 | 73.63 | 63.70 | a | 84.54 | ||||||||||
1992 | 63.97 | a | 70.21 | 72.67 | a | 87.13 | 91.97 | 100.83 | 103.81 | 100.73 | a | 100.03 | a | 90.23 | a | 71.34 | a | 61.77 | a | 84.56 | ||||||
1993 | 64.65 | 65.81 | a | 75.67 | a | 85.00 | 96.40 | a | 102.90 | 103.71 | 102.94 | 99.79 | a | 87.90 | 72.62 | a | 68.50 | c | 85.49 | |||||||
1994 | 69.87 | 68.52 | a | 78.39 | 85.17 | a | 92.58 | 107.28 | a | 106.77 | a | 106.86 | b | 101.50 | 85.87 | 70.73 | 66.23 | 86.65 | ||||||||
1995 | 63.97 | 74.54 | 75.87 | 81.86 | a | 88.50 | a | 101.55 | a | 107.67 | a | 107.40 | a | 101.89 | b | 93.13 | 81.33 | 71.17 | a | 87.41 | ||||||
1996 | 70.45 | 73.86 | a | 77.87 | 87.47 | 96.65 | 105.62 | a | 106.84 | 104.58 | 93.48 | a | 86.84 | 76.37 | 68.68 | 87.39 | ||||||||||
1997 | 64.16 | 70.36 | 82.45 | 81.97 | 98.06 | 100.13 | 105.94 | 104.16 | 101.17 | 86.87 | 76.83 | a | 60.90 | b | 86.08 | |||||||||||
1998 | 67.48 | b | 62.56 | a | 72.03 | b | 78.17 | 89.55 | 99.10 | 106.23 | 105.81 | 98.80 | 86.74 | 76.13 | 66.23 | 84.07 | ||||||||||
1999 | 70.45 | 74.50 | 78.77 | 79.24 | a | 91.14 | c | 100.67 | 101.35 | 103.16 | 98.93 | 92.81 | 82.23 | 66.89 | c | 86.68 | ||||||||||
2000 | 70.29 | 74.14 | 76.00 | 89.07 | 98.57 | a | 102.80 | 105.77 | 102.48 | b | 100.93 | a | 82.31 | b | 65.62 | a | 68.39 | 86.36 | ||||||||
2001 | 62.65 | 67.00 | 75.94 | 82.07 | a | 99.00 | b | 104.07 | 103.32 | c | 103.23 | 102.18 | b | 89.00 | 76.79 | a | 63.71 | 85.75 | ||||||||
2002 | 66.00 | a | 73.21 | 77.32 | 88.28 | a | 94.23 | 105.43 | b | 105.40 | a | 104.03 | b | 98.41 | c | 84.23 | 76.25 | b | 63.87 | a | 86.39 | |||||
2003 | 74.07 | b | 67.07 | 74.29 | 82.29 | b | 94.23 | a | 103.83 | a | 107.07 | b | 104.40 | a | 100.38 | a | 93.21 | b | 71.83 | a | 66.82 | c | 86.62 | |||
2004 | 65.66 | b | 65.20 | d | 82.93 | d | 82.25 | b | 94.93 | b | 101.93 | 104.30 | d | 101.55 | b | 97.66 | a | 84.52 | b | 68.18 | b | 66.14 | c | 84.60 | ||
2005 | 65.48 | 65.32 | 72.55 | 84.52 | a | 93.87 | 101.00 | a | 107.43 | a | 101.71 | 99.03 | 87.71 | 77.90 | 68.57 | a | 85.42 | |||||||||
2006 | 69.94 | 73.68 | 72.31 | b | 84.23 | 96.55 | 105.21 | b | 105.23 | 100.90 | 94.87 | 85.39 | 78.28 | a | 65.22 | d | 85.98 | |||||||||
2007 | 62.94 | 71.11 | 80.45 | 84.34 | a | 95.17 | a | 103.41 | a | 104.65 | 104.03 | 98.50 | 89.28 | b | 81.38 | i | 62.64 | c | 86.96 | a | ||||||
2008 | 63.22 | d | 66.81 | m | 77.39 | c | 89.88 | v | 89.23 | i | 104.00 | e | 103.31 | e | 101.79 | b | 98.92 | f | 89.00 | a | 78.15 | c | 64.86 | c | 85.22 | d |
2009 | 67.79 | c | 70.82 | 78.83 | a | 83.27 | 96.13 | 98.31 | a | 107.19 | 105.45 | 99.79 | a | 84.81 | 78.72 | a | 61.18 | c | 86.02 | |||||||
2010 | 65.21 | b | 66.80 | c | 72.71 | 82.34 | a | 90.33 | a | 102.11 | b | 104.84 | 103.74 | 101.82 | b | 87.16 | 72.50 | 69.40 | a | 84.91 | ||||||
2011 | 66.37 | a | 65.96 | 79.43 | a | 86.21 | a | 90.38 | b | 102.79 | b | 104.90 | b | 107.13 | 101.24 | a | 90.27 | a | 72.66 | a | 61.38 | b | 85.73 | |||
2012 | 68.68 | 70.79 | a | 77.87 | 87.28 | a | 95.75 | c | 104.50 | 102.90 | a | 104.47 | a | 97.93 | a | 89.29 | 79.27 | 65.57 | c | 87.02 | ||||||
2013 | 64.07 | a | 66.29 | 80.57 | a | 86.36 | b | 93.33 | a | 105.14 | a | 104.10 | a | 103.13 | 97.21 | a | 85.26 | 75.00 | a | 64.96 | c | 85.45 | ||||
2014 | 70.73 | a | 74.00 | a | 79.00 | 85.97 | 93.55 | 103.43 | 104.32 | 100.39 | 98.00 | b | 88.39 | 75.57 | 65.00 | a | 86.53 | |||||||||
2015 | 66.33 | a | 75.84 | c | 82.33 | a | 85.03 | 88.68 | 103.67 | 102.83 | b | 105.42 | 98.50 | b | 87.77 | a | 71.67 | 63.40 | a | 85.96 | ||||||
2016 | 63.72 | b | 79.00 | b | 81.68 | 84.59 | a | 91.53 | a | 106.87 | 106.26 | 101.81 | 97.28 | a | 92.30 | a | 77.50 | b | 66.27 | a | 87.40 | |||||
2017 | 62.23 | 71.46 | b | 83.71 | 87.18 | b | 94.41 | b | 106.70 | 104.52 | 103.06 | 97.80 | 92.74 | 81.77 | 70.90 | b | 88.04 | |||||||||
2018 | 73.23 | 71.07 | a | 79.35 | 89.31 | a | 95.19 | 104.37 | 105.90 | 102.71 | 101.33 | 81.84 | 74.53 | 64.73 | a | 86.96 | ||||||||||
2019 | 64.84 | 62.33 | a | 75.32 | 86.77 | 86.77 | 101.60 | 107.13 | 106.45 | 97.80 | 86.03 | 75.00 | 62.58 | 84.39 | ||||||||||||
2020 | 65.70 | a | 69.57 | a | 73.61 | 85.28 | a | 97.86 | b | 103.47 | 107.68 | 109.55 | 102.37 | 93.94 | 79.20 | 66.71 | 87.91 | |||||||||
2021 | 66.68 | 71.89 | a | 75.26 | 88.13 | 95.26 | 107.04 | b | 102.80 | a | 101.42 | 98.47 | 86.23 | 81.55 | a | 70.48 | b | 87.10 | ||||||||
2022 | 67.10 | 69.46 | 78.61 | 89.00 | b | 96.55 | 104.80 | 105.45 | 101.26 | 100.07 | 85.52 | 70.67 | 63.65 | 86.01 | ||||||||||||
2023 | 61.16 | 66.11 | 70.03 | 86.63 | 93.61 | 100.13 | 110.81 | 106.29 | 100.43 | 92.44 | d | 76.63 | 69.07 | b | 86.11 | |||||||||||
2024 | 62.80 | a | 68.31 | 74.09 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.56 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 66.29 | 70.16 | 77.11 | 85.14 | 93.77 | 103.21 | 105.26 | 103.60 | 99.12 | 88.43 | 75.54 | 65.75 | 86.15 | |||||||||||||
S.D. | 3.11 | 3.96 | 3.86 | 2.98 | 3.02 | 2.38 | 1.86 | 2.20 | 2.04 | 3.21 | 3.92 | 2.85 | 1.07 | |||||||||||||
SKEW | 0.71 | -0.01 | -0.28 | -0.14 | -0.34 | -0.27 | 0.45 | 0.61 | -0.47 | -0.03 | -0.37 | 0.14 | -0.09 | |||||||||||||
MAX | 74.07 | 79.00 | 83.71 | 92.13 | 99.00 | 107.28 | 110.81 | 109.55 | 102.37 | 93.94 | 82.23 | 71.17 | 88.04 | |||||||||||||
MIN | 61.16 | 62.33 | 68.03 | 78.17 | 86.77 | 98.31 | 101.35 | 100.07 | 93.48 | 81.84 | 65.62 | 60.90 | 84.07 | |||||||||||||
YRS | 37 | 36 | 35 | 35 | 35 | 36 | 37 | 37 | 36 | 37 | 35 | 36 | 33 |