| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.48 | 52.47 | 48.13 | 53.69 | ||||
| 1981 | 50.35 | 50.29 | 55.74 | 55.67 | 59.87 | 63.17 | 68.19 | 72.90 | 65.90 | 57.52 | 54.07 | 46.84 | 58.38 | |||||||||||||
| 1982 | 43.26 | 47.82 | 50.74 | 53.43 | 60.68 | 68.57 | 67.19 | 68.74 | 67.03 | 59.48 | 49.37 | 48.39 | 57.06 | |||||||||||||
| 1983 | 49.97 | 52.21 | 55.00 | 57.67 | 63.65 | 65.17 | 68.61 | 71.94 | 64.10 | 57.13 | 52.90 | 40.35 | 58.22 | |||||||||||||
| 1984 | 47.52 | 50.31 | 53.71 | 56.63 | 59.52 | 63.93 | 70.74 | 70.65 | 65.47 | 56.81 | 50.23 | 42.48 | 57.33 | |||||||||||||
| 1985 | 42.97 | 46.21 | 50.55 | 54.67 | 60.06 | 65.87 | 74.58 | 71.26 | 64.93 | 57.81 | 40.97 | 42.55 | 56.04 | |||||||||||||
| 1986 | 50.45 | 47.18 | 53.97 | 53.20 | 59.13 | 67.70 | 65.48 | 74.61 | 65.00 | 58.84 | 50.30 | 48.77 | 57.89 | |||||||||||||
| 1987 | 46.84 | 51.86 | 53.87 | 58.17 | 64.29 | 67.47 | 69.00 | 71.26 | 66.73 | 61.23 | 54.33 | 46.29 | 59.28 | |||||||||||||
| 1988 | 46.84 | 49.72 | 51.48 | 55.10 | 59.90 | 62.70 | 68.74 | 69.55 | 64.73 | 57.74 | 51.27 | 46.03 | 56.98 | |||||||||||||
| 1989 | 45.42 | 40.14 | 48.87 | 58.33 | 60.65 | 67.77 | 68.65 | 68.39 | 68.90 | 58.58 | 50.97 | 47.61 | 57.02 | |||||||||||||
| 1990 | 47.39 | 44.89 | 51.97 | 56.07 | 60.90 | 63.70 | 73.29 | 71.61 | 67.63 | 57.52 | 51.60 | 40.06 | 57.22 | |||||||||||||
| 1991 | 43.97 | 51.64 | 49.16 | 55.50 | 59.55 | 62.53 | 69.29 | 70.42 | 68.20 | 58.16 | 52.10 | 49.19 | 57.48 | |||||||||||||
| 1992 | 48.32 | 50.86 | 55.23 | 57.87 | 64.10 | 69.27 | 69.10 | 70.48 | 63.37 | 58.81 | 50.80 | 44.03 | 58.52 | |||||||||||||
| 1993 | 40.77 | 46.32 | 53.55 | 55.93 | 65.74 | 64.17 | 65.23 | 69.13 | 65.03 | 58.58 | 48.83 | 47.06 | 56.70 | |||||||||||||
| 1994 | 50.26 | 46.29 | 53.65 | 56.77 | 63.94 | 64.13 | 71.23 | 71.00 | 68.17 | 57.39 | 48.47 | 46.13 | 58.12 | |||||||||||||
| 1995 | 49.23 | 49.54 | 52.13 | 56.57 | 64.87 | 67.33 | 70.97 | 67.03 | 68.53 | 58.39 | 53.87 | 47.10 | 58.80 | |||||||||||||
| 1996 | 43.26 | 47.52 | 51.55 | 56.43 | 57.45 | 64.10 | 72.55 | ----- | z | 63.10 | 56.52 | 47.43 | 43.00 | 54.81 | ||||||||||||
| 1997 | 46.10 | 48.21 | 51.29 | 55.93 | 64.06 | 65.47 | 70.29 | 72.94 | 67.87 | 58.39 | 53.33 | 48.45 | 58.53 | |||||||||||||
| 1998 | 47.00 | 51.68 | 52.58 | 55.87 | 61.55 | 65.80 | 70.45 | 71.71 | 69.37 | 57.77 | 52.27 | 45.03 | 58.42 | |||||||||||||
| 1999 | 46.71 | 48.71 | 50.52 | 55.73 | 58.77 | 61.17 | 65.90 | 69.45 | 66.23 | 57.32 | 52.13 | 46.58 | 56.60 | |||||||||||||
| 2000 | 45.16 | 48.52 | 50.45 | 55.47 | 58.32 | 66.47 | 70.03 | 68.65 | 64.27 | 58.61 | 48.93 | 46.26 | 56.76 | |||||||||||||
| 2001 | 48.42 | 47.32 | 51.81 | 54.33 | 61.16 | 63.37 | 65.42 | 66.87 | 62.53 | 56.16 | 51.80 | 46.00 | 56.27 | |||||||||||||
| 2002 | 45.81 | 44.61 | j | 47.65 | 56.03 | 59.39 | 67.70 | 70.29 | 71.55 | 67.10 | 56.65 | 53.13 | 47.90 | 58.47 | ||||||||||||
| 2003 | 50.45 | 48.68 | 52.81 | 55.30 | 60.29 | 70.03 | 73.35 | 73.10 | 69.23 | 58.87 | 48.80 | 47.03 | 59.00 | |||||||||||||
| 2004 | 46.13 | 51.10 | 53.81 | 61.67 | 62.19 | 68.83 | 72.48 | 71.10 | 64.40 | 58.23 | 50.57 | 47.84 | 59.03 | |||||||||||||
| 2005 | 46.55 | 48.39 | 55.23 | 57.23 | 64.68 | 63.70 | 71.19 | 70.97 | 65.70 | 58.94 | 47.97 | 48.06 | 58.22 | |||||||||||||
| 2006 | 49.23 | 47.50 | 52.35 | 55.90 | 62.06 | 67.63 | 71.58 | 69.58 | 66.23 | 57.84 | 49.67 | 46.35 | 57.99 | |||||||||||||
| 2007 | 45.55 | 48.50 | 51.90 | 54.67 | 60.71 | 63.77 | 70.97 | 69.65 | 63.93 | 56.48 | 49.30 | 45.42 | 56.74 | |||||||||||||
| 2008 | 44.19 | 48.07 | 48.48 | 50.87 | 59.39 | 62.03 | 67.97 | 69.52 | 65.37 | 57.19 | 53.83 | 41.74 | 55.72 | |||||||||||||
| 2009 | 43.06 | 46.43 | 48.29 | 56.07 | 61.35 | 67.77 | 72.68 | 69.71 | 66.47 | 57.68 | 50.97 | 43.48 | 57.00 | |||||||||||||
| 2010 | 49.97 | 51.50 | 52.39 | 56.20 | 58.42 | 62.93 | 70.06 | 68.26 | 63.23 | 58.29 | 48.33 | 47.52 | 57.26 | |||||||||||||
| 2011 | 45.68 | 44.68 | 51.26 | 51.47 | 57.52 | 63.40 | 66.84 | 69.90 | 68.00 | 56.61 | 48.83 | 44.61 | 55.73 | |||||||||||||
| 2012 | 44.71 | 48.48 | 49.23 | 55.33 | 60.23 | 61.77 | 66.65 | 71.58 | 66.93 | 57.19 | 51.30 | 45.68 | 56.59 | |||||||||||||
| 2013 | 43.39 | 48.07 | 51.35 | 55.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.60 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 46.51 | 48.40 | 51.90 | 55.81 | 61.07 | 65.29 | 69.66 | 70.43 | 66.05 | 57.98 | 50.64 | 45.82 | 57.50 | |||||||||||||
| S.D. | 2.60 | 2.53 | 2.12 | 1.97 | 2.28 | 2.45 | 2.49 | 1.76 | 1.92 | 1.12 | 2.60 | 2.41 | 1.01 | |||||||||||||
| SKEW | -0.08 | -0.91 | -0.13 | 0.02 | 0.44 | 0.23 | -0.10 | 0.08 | 0.01 | 0.87 | -1.42 | -0.86 | 0.10 | |||||||||||||
| MAX | 50.45 | 52.21 | 55.74 | 61.67 | 65.74 | 70.03 | 74.58 | 74.61 | 69.37 | 61.23 | 54.33 | 49.19 | 59.28 | |||||||||||||
| MIN | 40.77 | 40.14 | 47.65 | 50.87 | 57.45 | 61.17 | 65.23 | 66.87 | 62.53 | 56.16 | 40.97 | 40.06 | 55.72 | |||||||||||||
| NO YRS | 33 | 32 | 33 | 32 | 32 | 32 | 32 | 31 | 32 | 33 | 33 | 33 | 30 | |||||||||||||