Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg., 2004,,,,,5744,6056,6071,6052,5858,5746,5476,5443,, 2005,5089,5426,5680,5734,6089,6229,6489,7932,7629,5893,5778,5438,6117, 2006,5331,5504,5740,5766,6213,6292,6182,6354,6059,5984,5601,5469,5875, 2007,5314,5568,5863,5861,6194,7988,6228,6273,5945,6037,5620,5396,6024, 2008,5214,5438,5367,5604,6147,6007,6035,5988,5905,6035,5337,5368,5704, 2009,5320,5411,5302,5724,5958,5915,5942,6010,5697,5553,5160,5200,5599, 2010,4933,5207,5459,,2648,6094,6932,6656,6387,6482,6085,6072,, 2011,5819,6003,6246,6366,6762,7054,7340,7628,6570,6371,4479,4249,6241, 2012,5777,6235,6412,6686,7191,7169,7271,7145,6690,6567,6221,6158,6627, 2013,5839,6270,6453,6525,6889,7064,7216,7936,7197,6986,6497,6195,6755, 2014,6098,6146,6969,7012,7474,7792,8357,7988,7254,7062,6464,6508,7094, 2015,6230,6594,6769,7069,7403,7509,7684,7536,7233,7229,6701,6612,7047, 2016,6441,6823,7012,7174,7604,7924,8183,8420,8091,7811,7362,7134,7498, 2017,6643,6971,7289,7361,8740,10454,10980,10923,10421,10058,8628,6755,8769, 2018,6531,6744,6991,7148,7927,7906,8210,8058,7662,7385,6847,6745,7346, 2019,6446,6428,6775,7208,7596,7581,7573,7709,7410,7148,6701,6606,7098, 2020,6348,6710,6226,5207,6471,7103,7507,7389,7290,6993,6180,6216,6637, 2021,6191,6326,6984,7205,7768,8014,8149,7763,7566,7427,6916,6889,7267, 2022,6496,6957,7209,7280,7745,7816,8305,8173,7995,7747,6798,6623,7428, 2023,6775,6886,7095,7302,7949,7852,9616,9403,7443,6989,6748,6789,7570, 2024,6425,6923, , , , , , , , , , , ,