YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | 92.60 | a | 98.68 | b | 97.63 | a | 96.93 | c | 96.46 | f | 87.42 | 75.97 | 67.16 | 88.06 | e | |||
1999 | 71.67 | a | 74.22 | a | 77.97 | 76.97 | 91.11 | c | 97.39 | b | 95.73 | a | 97.77 | 95.11 | c | 90.90 | 83.66 | a | 67.74 | 85.02 | ||||||
2000 | 72.77 | a | 73.66 | 74.41 | d | 85.50 | 96.93 | a | 98.97 | a | 100.50 | c | 97.80 | a | 97.90 | 81.80 | a | 66.24 | a | 70.58 | 84.75 | |||||
2001 | 62.35 | 66.59 | a | 73.58 | 81.23 | 94.74 | 100.07 | 96.94 | 97.71 | 97.37 | 87.84 | 77.33 | 63.77 | 83.29 | ||||||||||||
2002 | 67.00 | 71.25 | 75.45 | b | 86.87 | 92.26 | 103.63 | 99.10 | 98.06 | 95.45 | a | 83.61 | 76.63 | 64.07 | a | 84.45 | ||||||||||
2003 | 74.20 | a | 67.54 | b | 72.87 | 80.62 | a | 92.90 | b | 100.48 | c | 103.40 | a | 96.54 | c | 95.43 | 89.57 | a | 72.90 | 68.80 | a | 84.60 | ||||
2004 | 65.72 | b | 64.44 | b | 80.13 | a | 79.38 | a | 91.61 | 98.89 | b | 98.59 | b | 96.32 | 93.37 | 84.00 | a | 68.23 | 64.32 | c | 82.08 | |||||
2005 | 66.84 | 64.36 | 72.45 | 81.38 | a | 91.00 | a | 98.83 | 103.23 | 93.97 | 96.17 | 86.04 | c | 78.38 | a | 70.93 | a | 83.63 | ||||||||
2006 | 70.13 | 73.70 | a | 71.74 | 83.20 | 94.00 | b | 101.64 | b | 98.83 | b | 93.57 | a | 89.71 | b | 84.13 | 79.77 | 65.16 | 83.80 | |||||||
2007 | 61.06 | 69.36 | 77.45 | 82.30 | 91.89 | c | 100.33 | 98.84 | 96.81 | 93.93 | 86.60 | a | 79.87 | 62.10 | 83.38 | |||||||||||
2008 | 63.87 | 68.90 | 77.60 | a | 83.43 | 87.47 | a | 100.87 | 95.48 | 95.90 | 93.40 | 86.86 | c | 77.72 | a | 66.30 | a | 83.15 | ||||||||
2009 | 69.65 | 72.00 | 77.77 | 80.50 | 93.48 | 94.70 | 100.43 | a | 101.11 | c | 95.90 | 83.29 | 78.80 | 63.20 | a | 84.24 | ||||||||||
2010 | 65.58 | 65.00 | 70.90 | 81.22 | l | ----- | z | 100.30 | c | 99.00 | 96.65 | 96.53 | 85.37 | a | 72.87 | 71.67 | a | 82.39 | b | |||||||
2011 | 66.97 | a | 65.82 | 79.23 | 83.97 | a | 87.48 | 101.17 | 98.43 | a | 99.42 | 95.57 | 86.93 | a | 71.80 | 60.17 | a | 83.08 | ||||||||
2012 | 70.77 | 69.34 | 75.16 | 84.79 | a | 93.00 | b | 101.77 | 95.81 | 97.90 | a | 91.93 | a | 88.03 | 79.16 | e | 67.37 | a | 84.59 | |||||||
2013 | 62.35 | 63.50 | 78.68 | 82.10 | a | 90.81 | d | 102.15 | d | 96.35 | 96.59 | d | 93.10 | a | 84.45 | 75.21 | a | 65.90 | a | 82.60 | ||||||
2014 | 71.41 | b | 74.07 | 76.83 | a | 82.42 | d | 89.94 | 101.13 | 97.90 | b | 94.28 | b | 92.31 | a | 87.97 | a | 75.50 | b | 66.33 | a | 84.17 | ||||
2015 | 66.70 | a | 74.61 | 78.23 | 82.40 | 85.61 | 101.27 | 97.23 | i | 99.34 | b | 92.18 | b | 85.32 | c | 70.71 | f | 66.07 | c | 83.17 | b | |||||
2016 | 65.68 | 77.67 | e | 79.85 | d | 82.15 | d | 87.73 | a | 100.66 | a | 101.30 | k | 95.03 | b | 91.41 | c | 91.14 | b | 77.18 | b | 69.91 | h | 84.85 | b | |
2017 | 64.22 | d | 72.43 | 82.43 | a | 86.38 | a | 89.80 | f | 103.27 | h | 97.46 | g | 96.80 | a | 94.21 | b | 91.80 | a | 83.79 | b | 68.90 | b | 82.33 | c | |
2018 | 73.23 | 69.36 | c | 75.26 | 86.93 | c | 93.40 | a | 100.82 | b | 98.52 | b | 95.79 | c | 95.17 | a | 79.97 | 73.67 | 64.94 | 83.92 | ||||||
2019 | 64.94 | 63.20 | c | 75.53 | a | 82.37 | 83.23 | 98.03 | 101.32 | 99.90 | a | 94.00 | 86.32 | 75.23 | 64.81 | 82.41 | ||||||||||
2020 | 67.32 | 68.07 | 72.52 | 82.73 | 94.90 | b | 100.57 | 101.29 | 103.94 | 97.23 | 91.43 | a | 80.17 | 67.32 | 85.62 | |||||||||||
2021 | 66.39 | 71.43 | 72.13 | 84.36 | e | 92.71 | c | 101.66 | a | 94.61 | 97.11 | m | 93.93 | 85.33 | a | 81.97 | 70.66 | b | 83.20 | a | ||||||
2022 | 68.94 | 68.93 | a | 77.79 | b | 86.93 | a | 94.19 | 100.97 | 98.81 | 94.76 | b | 94.55 | a | 83.20 | a | 71.18 | b | 65.84 | 83.84 | ||||||
2023 | 64.23 | 64.79 | 71.84 | 84.68 | b | 91.61 | c | 97.47 | 105.94 | 101.17 | a | 97.77 | 90.00 | 78.00 | 70.40 | f | 86.13 | a | ||||||||
2024 | 64.67 | a | 69.28 | 70.93 | a | 77.40 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.29 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 67.26 | 69.37 | 75.72 | 83.07 | 91.44 | 100.10 | 98.99 | 97.36 | 94.55 | 86.51 | 76.45 | 66.42 | 83.82 | |||||||||||||
S.D. | 3.56 | 3.95 | 3.20 | 2.49 | 3.18 | 1.88 | 2.76 | 2.45 | 2.09 | 3.08 | 4.35 | 2.88 | 0.93 | |||||||||||||
SKEW | 0.31 | 0.15 | 0.12 | -0.26 | -0.86 | -0.91 | 0.67 | 0.76 | -0.29 | 0.01 | -0.45 | 0.01 | -0.09 | |||||||||||||
MAX | 74.20 | 77.67 | 82.43 | 86.93 | 96.93 | 103.63 | 105.94 | 103.94 | 97.90 | 91.80 | 83.79 | 71.67 | 85.62 | |||||||||||||
MIN | 61.06 | 63.20 | 70.90 | 76.97 | 83.23 | 94.70 | 94.61 | 93.57 | 89.71 | 79.97 | 66.24 | 60.17 | 82.08 | |||||||||||||
YRS | 26 | 26 | 26 | 24 | 24 | 25 | 23 | 25 | 25 | 26 | 25 | 24 | 19 |