Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
2001,,,,,,,,,,15838,15393,13756,,
2002,12941,14638,16079,16225,17177,18914,19339,19969,17295,16674,15702,15075,16669,
2003,13687,14303,15605,16030,17092,18849,19627,20259,17518,17052,15799,14238,16672,
2004,13088,14214,16570,16893,16929,18427,19282,19365,17525,16812,16014,15291,16701,
2005,13297,15207,16817,16643,16949,19014,19858,19609,17287,16597,16224,15191,16891,
2006,14021,15248,16736,17412,17516,19433,19488,19767,18267,17393,16916,15762,17330,
2007,14433,15723,17460,17504,17735,19409,20056,20525,18414,17676,17280,15093,17609,
2008,13662,14838,16723,16552,17179,17999,19091,19195,16513,16562,16341,14431,16591,
2009,13908,14741,16372,16640,17684,18845,20382,19966,18430,17292,16514,15005,17148,
2010,13871,15294,16848,16506,17114,18514,20159,19989,18515,17837,15864,15186,17141,
2011,14342,15233,16845,17006,17557,19189,20137,19465,17552,17327,16394,15589,17220,
2012,14056,15228,16603,16972,17456,19600,20307,20584,18482,18005,17038,15495,17486,
2013,13934,15330,17723,17602,18373,19946,20649,20888,18540,18269,16973,15971,17850,
2014,14826,15468,18367,18100,18892,20549,21369,21392,19325,18933,17420,16940,18465,
2015,15904,17358,19528,19353,20042,22495,23190,22786,21285,20338,19000,17536,19901,
2016,16314,18152,20357,20349,21380,23587,24226,23835,22072,21279,20193,16665,20701,
2017,14484,17336,21013,21637,22194,,24965,,,,,,,
2018, , , , , , , , , ,20953,21559,18566, ,
2019,17533,17403,21547,22144,22959,25156,26208,25706,23860,22930,20971,19672,22174,
2020,17897,19329,18941,14876,19597,23824,25301,25481,24961,23520,20426,19633,21149,
2021,19136,19042,23358,24229,25427,27839,29214,28053,25942,24747,23979,20814,24315,
2022,19046,21486,23418,23939,25402,27184,26912,26647,25625,24784,22780,20158,23948,
2023,19170,20486,22371,23508,25104,26851,26945,24936,24487,24677,22795,20528,23488,
2024,17986,21358,22698, , , , , , , , , , ,