Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
2005,,,,,,,,,,,,36030,,
2006,37012,39200,39862,39668,38651,39000,37338,38543,37234,38041,35939,35315,37984,
2007,34915,36978,38215,38870,39528,39059,38220,39822,36766,37531,35919,35151,37581,
2008,33023,35676,36478,37737,38607,37795,37258,37239,35889,35946,33970,34196,36151,
2009,32583,34421,34528,37295,38133,38246,37367,37070,36345,35583,34435,34570,35881,
2010,32713,35059,36152,37085,37139,37969,37773,38215,36498,36136,34213,34853,36150,
2011,33982,36158,37416,37730,38074,38089,36480,37749,36214,36324,34126,35476,36485,
2012,32716,35457,35765,37429,37836,36346,34852,35197,33421,33737,32923,32881,34880,
2013,30029,33098,34216,35431,36090,36451,35671,36777,35385,35871,34492,33423,34745,
2014,32326,33372,35503,36973,37636,37782,36465,37456,35614,35825,33695,34668,35610,
2015,33038,35131,35522,36825,37471,37274,36385,37058,35929,36610,35583,34992,35985,
2016,34050,35949,36895,38578,39329,39483,38085,39058,37637,37764,36123,34172,37260,
2017,31329,35858,37392,38711,39476,39830,38526,39109,37974,38257,36987,36626,37506,
2018,35297,35643,37202,38995,39880,39446,38668,39599,38260,38304,37317,36624,37936,
2019,35767,36901,39361,40722,40769,40933,40191,41507,40086,40260,38819,38362,39473,
2020,36314,38659,32215,26825,35098,38659,37910,38828,38296,37854,34190,35055,35825,
2021,33950,34950,37414,39388,39539,40208,38910,39339,37642,38278,36443,35704,37647,
2022,33718,36152,36886,37737,38568,38145,37350,38707,37326,37612,35664,36662,37044,
2023, , , , , , , , , , , , , ,
2024, , , , , , , , , , , , , ,