Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
2011,,9086,9441,9920,10096,10539,10501,10955,10737,10638,9519,9220,,
2012,8576,9333,9551,10179,10751,10830,10637,11261,10998,10734,9738,9358,10162,
2013,8481,9448,10013,10364,11108,11144,10627,10977,11032,10785,9763,9226,10247,
2014,8664,9318,10085,10657,11056,11172,10834,11280,11345,11078,9641,9535,10389,
2015,9082,10050,10534,10946,11306,,10751,11006,11198,10962,10006,9441,,
2016,9074,9922,10420,11061,11627,11837,11200,11564,11783,11322,10633,9590,10836,
2017,8680,9959,10874,11506,11913,11860,11578,12267,11981,11817,10923,10350,11142,
2018,9825,10601,11779,12265,12436,12323,11881,12268,12421,12262,11224,10465,11646,
2019,10115,10535,11560,12430,13088,13165,12529,13118,13188,12872,11803,11166,12131,
2020,10795,11537,10673,9529,11704,12452,12306,12832,13474,13380,11597,11185,11789,
2021,11119,11545,13511,14175,14296,14390,13794,13071,13723,13873,13554,12967,13335,
2022,11452,12333,12940,13643,14091,13708,13167,13731,13995,14024,12282,11452,13068,
2023,11534,12204,12610,13746,14357,14256,13788,14527,14501,14270,13120,12333,13437,
2024,11213,12896,13601, , , , , , , , , , ,