| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.70 | 68.15 | 57.02 | 47.85 | 61.18 | |||||
| 1992 | 46.40 | 56.24 | 57.39 | 63.45 | 69.08 | 69.07 | 72.84 | 74.34 | 71.07 | 67.92 | 56.37 | 47.65 | 62.65 | |||||||||||||
| 1993 | 47.35 | 50.91 | 58.69 | 59.97 | 65.77 | 72.38 | 72.23 | 73.55 | 71.50 | 66.05 | 54.20 | 47.48 | 61.67 | |||||||||||||
| 1994 | 49.16 | 50.41 | 57.81 | 60.83 | 64.68 | 70.20 | 71.29 | 73.08 | 70.45 | 64.47 | 49.95 | 46.21 | 60.71 | |||||||||||||
| 1995 | 52.74 | 54.34 | 54.27 | 58.95 | 62.73 | 68.77 | 73.87 | 74.60 | 72.15 | 67.02 | 60.33 | 53.81 | 62.80 | |||||||||||||
| 1996 | 50.50 | 55.34 | 57.61 | 61.80 | 66.87 | 71.83 | 75.24 | 75.26 | 69.62 | 64.76 | 56.50 | 53.11 | 63.20 | |||||||||||||
| 1997 | 50.02 | 54.12 | 58.95 | 62.30 | 70.58 | 71.10 | 73.68 | 73.24 | 73.80 | 64.06 | 57.60 | 48.37 | 63.15 | |||||||||||||
| 1998 | 51.13 | 51.64 | 56.39 | 58.20 | 59.42 | 66.32 | ----- | z | 75.24 | 71.87 | 62.77 | 54.97 | 46.24 | 59.47 | ||||||||||||
| 1999 | 48.05 | 50.89 | 52.76 | 59.18 | 62.03 | a | 68.21 | a | 71.19 | 72.26 | 70.52 | a | 66.76 | 58.18 | 50.56 | 60.88 | ||||||||||
| 2000 | 52.47 | 53.86 | a | 57.32 | 61.90 | ----- | z | 70.68 | 70.18 | 72.44 | 71.88 | 63.13 | a | 51.88 | 50.24 | 61.45 | ||||||||||
| 2001 | 47.71 | 51.32 | 58.95 | 57.38 | 70.92 | 72.75 | 70.87 | 72.24 | 69.27 | 66.74 | 57.33 | 50.10 | a | 62.13 | ||||||||||||
| 2002 | 47.53 | 53.14 | 54.50 | 59.57 | 63.65 | 70.23 | 72.81 | 71.23 | 71.27 | 64.26 | 56.98 | 51.45 | 61.38 | |||||||||||||
| 2003 | 52.26 | 52.39 | 58.06 | 55.93 | 64.69 | 69.85 | 75.11 | 72.89 | 72.77 | 67.77 | 53.48 | 50.74 | 62.16 | |||||||||||||
| 2004 | 49.39 | 52.59 | 62.21 | 62.78 | 66.15 | 70.08 | 71.98 | 74.03 | 72.73 | 63.18 | 54.45 | 49.79 | 62.45 | |||||||||||||
| 2005 | 47.53 | 54.82 | 58.42 | 59.12 | 65.00 | 67.52 | 75.29 | 73.02 | 68.08 | 64.76 | 57.57 | 52.48 | 61.97 | |||||||||||||
| 2006 | 51.37 | 54.11 | 51.89 | 58.63 | 65.95 | 72.27 | 76.90 | 71.11 | 69.27 | 62.92 | 56.08 | 49.18 | 61.64 | |||||||||||||
| 2007 | 47.42 | 53.04 | 59.34 | 61.35 | 65.68 | 70.47 | 72.50 | 74.05 | 69.40 | 62.24 | 56.67 | 48.21 | 61.70 | |||||||||||||
| 2008 | 47.87 | 52.12 | 55.79 | 59.25 | 65.73 | 71.52 | 73.18 | 74.24 | 70.83 | c | 66.00 | 57.37 | 47.77 | 61.81 | ||||||||||||
| 2009 | 49.87 | 51.32 | 56.06 | 60.17 | 66.27 | 68.25 | b | 71.92 | 73.19 | b | 73.73 | 62.71 | 54.72 | 47.27 | 61.29 | |||||||||||
| 2010 | 49.45 | 54.09 | 56.11 | 56.88 | 61.92 | 70.12 | a | 70.29 | 70.32 | 72.38 | 64.45 | 55.28 | 51.42 | 61.06 | ||||||||||||
| 2011 | 48.15 | 50.38 | 54.80 | a | 59.43 | 62.10 | a | 68.37 | c | 72.02 | a | 71.83 | b | 73.38 | 65.20 | a | 53.67 | 49.35 | a | 60.72 | ||||||
| 2012 | 50.42 | a | 53.41 | a | 54.79 | 60.65 | 66.42 | 70.46 | d | 72.40 | e | 73.18 | l | 68.57 | i | 64.37 | 55.72 | 48.50 | 59.71 | |||||||
| 2013 | 44.65 | 49.61 | 56.15 | 59.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.50 | z | 50.13 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 49.16 | 52.73 | 56.74 | 59.89 | 65.28 | 70.02 | 72.79 | 73.11 | 71.32 | 64.99 | 55.74 | 49.45 | 61.85 | |||||||||||||
| S.D. | 2.10 | 1.78 | 2.37 | 1.95 | 2.88 | 1.69 | 1.79 | 1.36 | 1.58 | 1.82 | 2.27 | 2.13 | 0.78 | |||||||||||||
| SKEW | -0.02 | 0.08 | 0.00 | -0.08 | 0.14 | -0.29 | 0.57 | -0.22 | -0.20 | 0.28 | -0.59 | 0.39 | -0.07 | |||||||||||||
| MAX | 52.74 | 56.24 | 62.21 | 63.45 | 70.92 | 72.75 | 76.90 | 75.26 | 73.80 | 68.15 | 60.33 | 53.81 | 63.20 | |||||||||||||
| MIN | 44.65 | 49.61 | 51.89 | 55.93 | 59.42 | 66.32 | 70.18 | 70.32 | 68.08 | 62.24 | 49.95 | 46.21 | 60.71 | |||||||||||||
| NO YRS | 22 | 22 | 22 | 21 | 20 | 21 | 20 | 20 | 21 | 22 | 22 | 22 | 18 | |||||||||||||