Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg., 2005,,8656,8688,9315,9155,8884,8550,9368,9191,9611,8315,7550,, 2006,7790,8321,8774,8969,9105,8999,8657,9403,9043,9059,8000,7397,8626, 2007,7282,8022,8475,8813,8944,8599,8566,9409,9075,9092,8186,7183,8471, 2008,6959,7712,8022,8692,8851,8527,8637,8992,9162,9028,8114,6885,8298, 2009,6954,8134,7909,8953,9092,8981,8912,9518,9094,9194,8028,7356,8510, 2010,7378,8168,8459,8820,8853,9109,8759,9390,9231,9055,8930,6927,8590, 2011,7267,7481,7973,8424,8560,8290,8285,9212,9016,8738,7621,7252,8176, 2012,6786,7727,7837,8427,8457,8180,8211,9082,8654,8590,7692,6950,8049, 2013,6839,7657,8109,8575,8720,8364,8198,9351,8960,8843,7963,7230,8234, 2014,7330,7575,8432,8848,8980,8856,8590,9272,9045,8867,7888,7394,8423, 2015,7379,8260,8433,8857,9019,8826,8658,9209,9218,9172,8247,7455,8561, 2016,7619,8493,8754,9409,9337,9160,8721,9412,9387,9187,8514,7329,8777, 2017,7239,8037,8493,9151,9372,9107,8941,9456,9211,9520,8461,7662,8721, 2018,7915,8231,8796,9389,9443,9339,9105,9739,9425,9514,8712,7803,8951, 2019,7942,7413,8627,9526,9666,9408,9118,9759,9655,9524,8557,8029,8935, 2020,7469,8361,7286,6057,7652,8715,8457,9526,9101,8809,7855,7334,8052, 2021,7772,7550,8885,9382,9530,9533,9293,9937,9664,9760,8816,7809,8994, 2022,7946,8695,9183,9376,9711,9655,9066,10379,10397,10251,9183,7894,9311, 2023,8874,9192,9151,9813,10062,9593, , , ,10683,9476,8859,9439, 2024,8431,9450, , , , , , , , , , , ,