Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
2001,,,,,26346,27558,26027,27203,25786,26286,25289,23234,,
2002,22473,25815,25319,28165,27747,27505,25318,26898,25407,26718,24516,25224,25925,
2003,25494,25827,25125,26912,26172,27556,25839,25966,26301,26685,23413,23581,25739,
2004,23120,24906,26279,26822,25099,25758,24722,25328,25643,25057,24147,24485,25114,
2005,23262,25307,26104,26571,25142,26633,24946,26817,25351,25104,24269,23312,25235,
2006,23776,25628,26313,25893,26148,26475,24481,27512,26056,26305,24631,22917,25511,
2007,24009,25544,26099,26245,25878,25704,24780,26612,25211,26305,24293,22145,25235,
2008,22601,24625,24079,25712,24761,24101,23503,23890,24403,24974,22200,21961,23901,
2009,21793,23871,23640,25197,23619,24466,23378,20956,23814,23720,22154,21676,23190,
2010,21325,23808,24571,24935,23946,24498,23978,25008,25096,24515,23063,21956,23892,
2011,22841,24082,24475,25026,24583,24534,23770,24980,24428,24439,22764,22183,24009,
2012,22297,23978,23929,25049,24728,24305,23457,24521,24224,24518,23215,22068,23857,
2013,21157,24099,24490,25414,25230,24974,23868,24476,24423,24678,22956,21758,23960,
2014,22025,23511,24237,25492,24938,25023,23988,25318,24981,25393,22728,22891,24210,
2015,22818,24857,25238,26271,25412,25775,24976,25368,25338,24995,22827,21969,24654,
2016,22783,23535,24069,25367,24852,24876,21787,0,25168,25387,23607,21928,24144,
2017,20923,24556,25612,26640,26468,26936,25310,26716,26354,25975,24591,23852,25328,
2018,24185,25891,26585,28936,28212,28192,27248,28317,27830,27770,25885,24353,26950,
2019,25032,25769,27025,27963,27226,27785,26321,27689,27315,26800,24889,24043,26488,
2020,24108,25881,19424,13111,17431,20615,20078,21282,21068,20940,18334,17880,20013,
2021,18393,19734,21731,23061,23268,24131,23068,24051,23413,23157,21678,20967,22221,
2022,20419,22822,23811,24723,24347,24187,23438,25068,24780,24452,22047,21117,23434,
2023,22101,23381,23313,25179,25099,24665,23750,24896,25316,25355,23629,22485,24097,
2024,21293,24234,24505, , , , , , , , , , ,