YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
2005,,,,9337,9119,9630,9083,9511,8569,8539,7844,8171
2006,8100,8667,8776,8400,9437,9585,8617,9826,8545,,8500,7465
2007,8262,8407,8978,9497,10139,9358,,,9536,9274,8599,7990
2008,7322,8105,8421,,8756,8822,8239,,,,7520
2009,7454,7731,7571,8416,8689,8926,8481,8738,8339