Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
2005,,,,9337,9119,9630,9083,9511,8569,8539,7844,8171,,
2006,8100,8667,8776,8400,9437,9585,8617,9826,8545,,8500,7465,,
2007,8262,8407,8978,9497,10139,9358,,,9536,9274,8599,7990,,
2008,7322,8105,8421,,8756,8822,8239,,,,7520,,,
2009,7454,7731,7571,8416,8689,8926,8481,8738,8339,8164,,7369,,
2010,6921,7751,8085,,8292,9069,8514,8805,8158,8256,7563,7302,,
2011,7213,7434,7698,8422,8228,8717,8251,8644,8144,8243,7580,7542,8010,
2012,7071,7438,7729,8174,8370,8603,8055,8324,7676,7738,7528,7338,7837,
2013,6332,7397,7884,,8208,8682,8118,8307,8174,8330,7674,7251,,
2014,7026,7351,8019,8643,8424,8819,8284,8753,8466,8713,7524,7836,8155,
2015,7445,8272,8575,8905,8913,9238,9037,9288,9030,9171,8435,8149,8705,
2016,7985,8658,9003,9794,9840,10461,9604,10122,9669,9712,9149,8191,9349,
2017,7111,8700,9486,10172,10378,10927,10099,10906,10048,10241,9590,9418,9756,
2018,9002,9384,9933,10598,10896,11315,10669,11088,10722,10812,10062,9542,10335,
2019,9498,9398,10518,11248,11187,11803,11427,11475,11046,11224,10421,10104,10779,
2020,9807,10467,9290,8095,9927,11035,10819,11126,11212,11228,9924,9888,10235,
2021,10003,9824,11414,12066,12127,12929,12169,12576,12181,11923,11239,10505,11580,
2022,10041,11046,11537,12300,12398,12747,12100,12981,12461,12472,10836,10280,11766,
2023,10484,11113,11322,12476,12766,13382,12710,13249,12333,12311,11238,10821,12017,
2024,9566,11404,11847, , , , , , , , , , ,