Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
2007,,,,,,,,,,,,18450,,
2008,18763,20617,21026,22293,21735,20850,20465,21985,20885,21333,19463,19751,20764,
2009,19369,20608,20668,21714,22017,23582,20635,20216,20965,20817,19874,19330,20816,
2010,19282,20897,21892,22111,21800,22204,21876,23476,22197,21985,20578,20374,21556,
2011,21112,21379,22020,22440,22707,22674,22016,23864,21705,21971,21103,20793,21982,
2012,20383,21568,22382,23651,24218,24036,23577,25568,23788,23335,22173,22054,23061,
2013,20178,23121,24070,24700,25202,24751,24098,25997,24592,24658,23334,24228,24077,
2014,23358,24049,24811,25368,24891,24891,23919,26426,24945,25747,23135,23612,24596,
2015,23216,25063,25206,25828,25750,26066,25057,26659,25089,24872,23274,22440,24877,
2016,22989,23966,24366,25186,25181,24483,22951,25284,23697,24218,23160,21879,23947,
2017,19524,23476,24518,25321,25253,25713,24445,26677,24863,25075,24107,23664,24386,
2018,23333,24336,25245,26206,26128,26476,24776,27085,25562,25139,24161,23876,25194,
2019,23962,24192,25511,26041,25741,26154,24816,27260,25718,25854,24475,23465,25266,
2020,24081,25196,19706,13696,18389,21214,20599,21662,22113,20963,19356,20312,20607,
2021,20318,21411,23337,24586,24937,25242,24283,26774,25371,25906,24694,24193,24254,
2022,22737,25078,26218,26784,27327,26691,25705,28062,26437,26525,24505,23870,25828,
2023,24590,25684,26047,27684,27766,27139,26157,28387,26609,26877,25706,25586,26519,
2024,23460,26722,27323, , , , , , , , , , ,