YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 103.40 | e | 110.42 | 103.38 | b | 99.03 | 79.46 | e | 72.25 | b | 67.39 | 90.76 | e | |||
1973 | 65.87 | 72.50 | 70.14 | b | 83.41 | c | 96.39 | 104.90 | 105.80 | a | 105.48 | b | 98.97 | 92.14 | i | 74.36 | h | 70.32 | 87.38 | b | ||||||
1974 | 66.37 | a | 73.68 | f | 80.48 | 86.86 | h | 93.42 | 105.21 | a | 103.90 | 105.33 | g | 99.50 | 89.39 | 76.17 | a | 64.16 | 86.51 | c | ||||||
1975 | 67.84 | 69.70 | a | 76.33 | d | 79.90 | 92.87 | ----- | z | 105.61 | c | 105.00 | f | 101.28 | e | 88.00 | d | 76.39 | b | 67.45 | 82.54 | b | ||||
1976 | 69.81 | 73.31 | 76.27 | a | 80.52 | e | 97.79 | g | 106.67 | f | 110.00 | h | 110.00 | f | 95.45 | a | 86.23 | e | 77.93 | 69.45 | 78.62 | d | ||||
1977 | 67.27 | a | 77.56 | a | 74.81 | 87.73 | 86.86 | c | 103.90 | a | 107.72 | b | 105.63 | a | 99.93 | 92.48 | 79.62 | a | 71.13 | 87.89 | ||||||
1978 | 67.26 | 70.86 | 79.67 | a | 84.68 | b | 94.55 | 106.33 | 108.52 | 104.84 | 97.43 | 91.80 | a | 72.73 | 62.35 | 86.75 | ||||||||||
1979 | 59.74 | 70.07 | 75.03 | 86.17 | 90.77 | 102.97 | 106.58 | 103.03 | a | 104.40 | 91.06 | 73.27 | 70.74 | 86.15 | ||||||||||||
1980 | 68.62 | b | 73.90 | 74.55 | 87.07 | 88.81 | 103.67 | 109.03 | 106.32 | 101.47 | 90.71 | 80.00 | b | 73.87 | 88.17 | |||||||||||
1981 | 70.77 | 75.64 | 77.84 | 88.75 | b | 92.90 | 106.96 | d | 107.13 | 107.77 | a | 99.63 | 84.84 | 78.76 | a | 70.26 | 88.44 | |||||||||
1982 | 66.06 | 73.57 | 75.93 | a | 86.23 | 95.04 | f | 101.44 | n | 105.42 | e | 104.24 | j | 99.00 | 87.17 | a | 72.63 | 65.23 | a | 81.25 | c | |||||
1983 | 68.90 | b | 70.50 | 75.82 | c | 81.04 | b | 95.86 | c | 101.89 | l | 106.06 | m | 100.68 | f | 101.11 | b | 88.36 | c | 75.75 | b | 70.54 | c | 80.87 | c | |
1984 | 72.46 | c | 75.79 | e | 83.00 | g | 88.14 | i | 99.32 | c | 99.00 | f | 102.11 | l | 103.48 | h | 101.79 | f | 84.96 | g | 76.75 | j | 64.68 | f | 82.53 | i |
1985 | 67.04 | h | 71.61 | e | 76.70 | k | 89.57 | i | 95.34 | b | 106.75 | f | ----- | z | 107.07 | p | 93.00 | l | 86.44 | f | 73.81 | d | 69.12 | f | 80.25 | i |
1986 | 75.72 | b | 77.75 | h | 81.79 | l | 86.55 | j | 95.60 | f | 103.54 | f | 101.96 | c | 105.11 | l | 94.46 | d | 87.00 | j | 77.24 | e | 70.38 | j | 87.35 | h |
1987 | 67.12 | e | 74.31 | o | 77.92 | g | 90.77 | d | ----- | z | 103.75 | b | 104.92 | s | 102.55 | i | 100.14 | i | 90.74 | h | 75.39 | b | 64.37 | a | 80.28 | g |
1988 | 66.29 | n | 77.80 | i | 79.50 | k | ----- | z | 99.58 | s | 104.05 | j | 108.17 | h | 107.00 | c | 101.44 | c | 96.80 | k | 76.40 | j | 68.29 | 92.24 | i | |
1989 | 65.70 | d | 73.14 | 83.66 | b | 93.48 | a | 96.48 | b | 102.37 | 107.50 | a | 102.90 | 102.47 | 91.61 | 80.80 | 70.74 | 89.24 | ||||||||
1990 | 67.03 | 69.26 | a | 82.41 | b | 88.34 | a | 92.57 | c | 104.69 | a | 104.72 | b | 103.90 | b | 100.87 | 93.77 | a | 80.40 | 65.93 | a | 87.82 | ||||
1991 | 68.45 | 80.48 | a | 73.48 | b | 85.86 | a | 91.10 | b | 99.00 | a | 104.55 | 104.48 | 101.64 | b | 94.84 | 80.34 | a | 70.30 | a | 87.88 | |||||
1992 | 68.52 | 74.21 | 75.90 | b | 91.40 | 95.67 | a | 101.07 | a | 103.94 | 105.25 | c | 103.50 | 93.13 | 76.10 | a | 63.58 | 87.69 | ||||||||
1993 | 65.16 | 67.86 | 81.48 | 89.30 | 95.90 | 101.20 | 103.81 | 103.58 | 101.90 | a | 93.36 | c | 74.30 | 68.61 | 87.20 | |||||||||||
1994 | 71.67 | a | 71.59 | a | 81.48 | 90.33 | 91.52 | h | 105.50 | 106.80 | a | 106.52 | 102.37 | 91.23 | 79.73 | 69.60 | a | 88.80 | a | |||||||
1995 | 68.52 | 79.68 | 81.73 | a | 84.97 | a | 90.07 | a | 101.27 | 108.13 | 108.33 | a | 103.57 | 93.77 | a | 84.43 | 74.32 | 89.90 | ||||||||
1996 | 73.06 | 77.14 | 81.58 | 91.63 | 97.97 | 107.73 | 108.32 | 107.20 | a | 98.77 | 91.03 | a | 80.93 | 72.29 | 90.64 | |||||||||||
1997 | 70.19 | 73.64 | 86.68 | 85.62 | a | 99.50 | a | 100.07 | 106.40 | a | 106.80 | a | 100.93 | b | 89.77 | 79.87 | 67.03 | 88.88 | ||||||||
1998 | 71.32 | 67.70 | a | 77.38 | b | 82.04 | b | 89.73 | a | 100.62 | f | 109.32 | 108.87 | a | 102.87 | 89.55 | 78.97 | 71.28 | f | 87.77 | b | |||||
1999 | 73.58 | 77.23 | b | 81.26 | 82.30 | c | 94.45 | 102.07 | a | 102.65 | e | 105.20 | a | 103.14 | a | 96.63 | a | 85.07 | a | 70.07 | a | 89.47 | ||||
2000 | 75.45 | 76.86 | 78.63 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.98 | i | ||
2001 | ----- | z | ----- | z | 81.35 | h | 86.28 | e | 103.14 | b | 107.56 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 98.99 | i |
2002 | ----- | z | ----- | z | ----- | z | 92.37 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.61 | m | 92.37 | k | |
2003 | 76.25 | k | 69.74 | e | 79.65 | k | 82.57 | i | 97.65 | k | 103.91 | h | 108.65 | h | 105.45 | k | 101.70 | g | 95.70 | h | 72.33 | i | 68.41 | i | 69.74 | k |
2004 | 69.71 | j | 70.57 | h | 88.46 | g | 89.48 | i | 96.65 | 103.73 | 106.52 | 105.61 | 100.13 | 85.26 | 69.07 | 66.10 | 91.63 | d | ||||||||
2005 | 66.71 | 67.79 | 76.23 | 85.80 | 96.06 | ----- | z | 109.87 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.74 | f | |||||
2006 | 71.39 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.39 | k | |
2007 | ----- | z | ----- | z | 83.32 | 86.77 | 96.29 | 105.20 | 107.03 | 107.35 | 101.20 | 90.13 | 81.87 | 63.19 | 92.24 | b | ||||||||||
2008 | 65.26 | 71.28 | 81.03 | 87.93 | 91.19 | 106.97 | 106.23 | 104.97 | 103.17 | 92.13 | 80.17 | ----- | z | 90.03 | a | |||||||||||
2009 | 72.03 | 73.46 | 80.13 | 85.00 | 99.65 | 98.73 | 109.68 | 107.55 | ----- | z | 87.63 | a | 80.00 | 66.42 | 87.30 | a | ||||||||||
2010 | 69.71 | 70.04 | 75.13 | 83.10 | 90.45 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.69 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 68.95 | 72.97 | 78.51 | 86.51 | 94.43 | 103.68 | 106.58 | 105.74 | 100.70 | 90.13 | 77.72 | 68.29 | 88.29 | |||||||||||||
S.D. | 3.37 | 3.49 | 3.73 | 3.61 | 3.76 | 2.59 | 2.23 | 1.72 | 2.35 | 3.65 | 3.78 | 3.22 | 1.23 | |||||||||||||
SKEW | -0.13 | 0.39 | 0.01 | 0.04 | 0.10 | -0.24 | -0.20 | -0.02 | -0.86 | -0.86 | -0.24 | -0.10 | 0.19 | |||||||||||||
MAX | 75.72 | 80.48 | 86.68 | 93.48 | 103.14 | 107.73 | 110.42 | 108.87 | 104.40 | 96.63 | 85.07 | 74.32 | 90.64 | |||||||||||||
MIN | 59.74 | 67.70 | 70.14 | 79.90 | 86.86 | 98.73 | 101.96 | 102.90 | 94.46 | 79.46 | 69.07 | 62.35 | 86.15 | |||||||||||||
YRS | 31 | 29 | 28 | 29 | 28 | 24 | 27 | 23 | 28 | 26 | 29 | 27 | 14 |