YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
2001,,,,,,,,,,23417,24844,23753
2002,23159,24348,25136,24823,25527,25402,25543,26018,24387,22576,24026,25092,24670
2003,23145,23981,23889,24876,25684,25632,25274,25416,20692,23949,22697,24406,24137
2004,22993,23055,24398,24458,23856,25036,24954,24518,23553,23589,23349,24768,24044
2005,21958,23577,23826,23619,23909,24552,24887,26374,23182,23022,22870,24793,23881
2006,22044,23305,24252,23855,24676,25040,24344,23920,19593,23449,23686,24694,23572
2007,22555,24098,25237,25000,25725,25844,25266,26422,24014,24895,24067,23946,24756
2008,22481,23423,24083,25027,26501,25759,,24708,24415,24917
2009,23916,24936,24496,26694,25486,24658,24810,25089,24254,23954,23342,25105,24728
2010,22753,24468,24665,25139,24602,25410,25308,25671,24744,24452,23302,25086,24633
2011,22966,24288,23766,24377,24563,25851,24602,25122,23869,24018