Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1990,7180,7811,8903,9328,9498,10424,10460,10412,9504,9012,8567,7151,9026,
1991,7165,8128,9107,9376,9470,10778,11095,11223,10213,9713,9233,8325,9492,
1992,7889,8671,9412,9841,10149,10994,11223,11437,10776,10096,9636,8268,9895,
1993,7846,8646,9770,10236,10576,11366,11977,12013,10819,10552,9366,8826,10176,
1994,8387,8795,10470,10750,11557,12209,12531,12569,11335,11108,9494,8856,10684,
1995,8790,9405,,10617,11116,12028,12340,12436,11694,10838,10245,9606,,
1996,8348,9639,10875,11008,11448,12533,12774,12805,10514,,10487,9166,,
1997,9062,10046,11085,11402,12081,12439,12901,13306,12494,11763,11186,10133,11492,
1998,9569,10412,11420,12283,12449,13637,13854,14042,12943,12268,11560,10508,12079,
1999,9985,10530,11980,12272,12769,13876,13946,14053,13103,12461,11892,10691,12297,
2000,9930,10779,11730,12236,12645,13715,14121,14119,12790,12189,11090,10499,12154,
2001,9855,10487,11724,12323,12729,13769,13805,13842,12564,12072,11539,10042,12063,
2002,9893,10961,11870,12239,13083,13890,13837,14003,13024,12481,11530,10791,12300,
2003,10274,10753,11542,12003,12855,,13506,14165,12999,12229,11118,9812,,
2004,9657,10204,10323,12494,12451,13434,14023,13768,12977,12272,11435,10553,11966,
2005,8969,10822,12032,12495,12624,13123,13700,13790,12611,11873,11387,10256,11974,
2006,9850,10786,11587,12203,12570,13523,13628,13520,12887,12093,11515,10677,12070,
2007,9788,10881,12143,12284,12463,13583,13886,14131,12923,12383,11866,10249,12215,
2008,9629,10514,11405,11595,12122,12540,12777,12546,12164,11561,10932,9750,11461,
2009,9520,10117,10660,11826,12476,13255,13707,13471,12834,11956,11235,10097,11763,
2010,9415,10783,11605,11647,12163,13382,13821,13463,12976,12388,10884,10101,11886,
2011,9874,10337,11327,11904,12145,13188,13647,13506,12721,12103,11122,10526,11867,
2012,9865,10466,11267,11899,12358,13035,13489,13837,13019,12187,11496,10025,11912,
2013,9392,10268,11563,11742,12270,13023,13434,13426,12377,11882,11156,10158,11724,
2014,9746,10264,11661,12024,12315,13170,13677,13346,12630,12286,11175,10789,11923,
2015,10194,11215,12086,12483,13283,14358,14574,14357,13680,12945,11847,10824,12654,
2016,10313,11360,12588,12952,13638,14773,14802,14827,13993,13433,12811,10530,13002,
2017,9579,10573,12797,13386,14277,15184,15204,15146,13920,13625,12803,11386,13157,
2018,11009,11420,12968,13477,14155,15314,15568,15783,14748,14049,13123,11415,13586,
2019,11126,11133,13148,14010,14616,15790,16158,15877,14976,13962,13066,11704,13797,
2020,11084,11772,11432,9412,12127,14395,15289,15205,14949,13773,12013,11428,12740,
2021,11260,11357,13549,14260,15087,16887,17064,16341,15598,14587,13740,11798,14294,
2022,10713,11851,13132,13822,14592,15678,15465,15365,14921,14207,12741,10800,13607,
2023,11125,11604,12778,14080,15223,16218,16238,16064,15713,15262,14149,12518,14248,
2024,11238,13042,13372, , , , , , , , , , ,