Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg., 1990,21516,22252,26118,27984,29896,33400,36462,37109,30788,27322,25391,22982,28475, 1991,21566,24977,26555,28885,30875,35751,41933,43238,34778,30376,27308,27774,31213, 1992,25196,27777,29991,31638,33849,37338,41573,42467,34194,34036,30675,28562,33224, 1993,27471,30479,32719,36729,37637,41662,45445,48324,39613,37011,32851,33322,36983, 1994,30275,31347,34860,37000,38178,42254,46760,47628,38751,32883,30882,31746,36922, 1995,29906,31912,34046,35943,38204,40786,44433,45378,38992,36040,33313,,, 1996,26327,33692,36210,39215,40891,45745,,49601,42071,39115,32437,32080,, 1997,32059,35276,37294,39535,41605,45399,49317,50853,43106,40293,37801,37209,40812, 1998,33053,37440,39962,41633,44106,47495,49695,51146,44622,41626,38403,38727,42326, 1999,33826,36931,40543,42340,43341,47510,51125,51112,45308,42395,36565,38691,42474, 2000,34394,38086,40922,42111,42822,47555,,,,40835,37912,36656,, 2001,34816,37038,40500,40737,43195,47480,52315,53510,45575,42742,40118,38073,43008, 2002,36338,38997,39538,43268,45760,49474,54140,54551,46311,44727,41533,41107,44645, 2003,38173,40814,40052,43697,46543,50989,54799,55634,47981,46559,40358,40768,45531, 2004,37215,41981,44933,46695,45463,52889,56930,55803,49493,46715,44353,43871,47195, 2005,39413,44580,46638,47612,49934,54615,57386,58609,50371,47929,44993,44444,48877, 2006,42967,45604,48279,49628,51537,56022,58544,59274,52795,50811,46258,45659,50615, 2007,42894,45826,48166,49447,52477,56142,59513,60918,52375,49946,47628,44082,50785, 2008,39679,44228,46594,48235,50576,52786,55936,56474,50036,48242,44106,38462,47946, 2009,40583,44142,44917,48093,50546,54132,58629,57640,50472,46974,43165,43948,48603, 2010,41453,45059,47412,48253,44387,53159,58638,58984,51579,48205,42881,42810,48568, 2011,41424,43029,46139,47706,49408,54083,57929,57505,51817,49077,,45070,49243, 2012,40720,43506,45607,,49481,53456,58634,59913,51536,48489,44966,44123,49482, 2013,41100,45453,47697,48927,50461,56142,60118,59930,51939,49200,47526,45033,50294, 2014,43088,44438,49467,50984,53706,57378,61509,62435,54434,52681,49110,48803,52336, 2015,45619,51422,53358,53937,54304,61141,64539,63902,57940,55696,51478,49530,55239, 2016,48661,53283,55224,58238,59607,64975,68112,68385,60980,57655,54517,50534,58348, 2017,47948,51309,56670,59078,62294,66629,70036,68974,60991,60073,55917,52765,59390, 2018,51904,53807,58298,60178,63795,67518,71615,67939,61103,58435,55610,54555,60396, 2019,52560, ,57289,56855,60064,65744,68068,69084,63748,59825,58040,56971,60137, 2020,52132,57450,47465,39167,52841,64333,67406,68869,64531,64418,54341,55918,57406, 2021,57172,56615,63380,65826,68922,74230,76671,74290,,65895,61369,57612,65670, 2022,54316,61159,65045,65100,67498,71095,74173,73392,67497,65132,56122,54414,64579, 2023,56803,58753,61515,64563,68543,72816,74613,73060,67024,64434,59656,58529,65026, 2024,53092,58512, , , , , , , , , , , ,