YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
2006,,,,,,,20242,19595,18878,16863,17779,17992
2007,16646,18206,20419,20588,20602,21849,22635,22320,21112,19339,20188,17422,20111
2008,16862,17154,19410,20470,20653,21358,22963