Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
2009,,,,,,,,8390,8338,8235,7906,7492,,
2010,7499,8025,8528,10540,9345,9038,8542,10756,8630,8648,7924,7945,8785,
2011,7748,8052,8273,8096,7750,8527,8059,7849,7945,8203,7670,7793,8011,
2012,7475,7919,8161,8552,8533,8645,8502,7866,8206,8166,7845,7716,8132,
2013,6959,7739,8307,8474,8734,8733,8494,8438,8272,8387,8186,8044,8231,
2014,7734,8200,8770,8958,9138,8985,9135,9101,8775,8668,8234,8681,8698,
2015,8357,9000,9308,9506,9767,9579,9409,9421,9240,9301,8939,9170,9250,
2016,8701,9186,9329,10019,9940,10059,9983,10071,10078,10006,9723,9186,9690,
2017,8363,9841,10759,10954,11249,10972,11102,12088,10620,10759,10537,10404,10637,
2018,10131,10566,11213,11801,11973,12571,11906,11777,11447,11333,9464,10303,11207,
2019,10195,10349,11571,11609,12027,12074,11852,11943,11854,11887,11294,11232,11491,
2020,10719,11483,10873,9883,11418,12073,11819,12264,12306,12142,11060,11328,11447,
2021,11100,11238,12648,13193,12994,12904,12456,12258,12085,12227,11662,10560,12110,
2022,10356,11535,12458,12923,13157,13056,13129,13322,12963,13211,12177,12016,12525,
2023,11902,12582,12746,13736,14063,13493,13306,13280,13124,13336,12709,12583,13072,
2024,11183,12741,13132, , , , , , , , , , ,