Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1995,4540,4808,5150,5382,5471,5212,5381,5297,5373,5336,4864,4680,5125,
1996,4530,4873,5327,5523,5751,6107,5991,6426,6232,5907,5513,4927,5592,
1997,4881,5495,6144,6334,6462,6474,6464,6255,5957,6367,5553,5294,5973,
1998,4834,5542,5923,6153,6251,6406,6235,6140,6361,6472,6255,6104,6056,
1999,5926,6134,6732,6796,6953,7143,7087,7198,6919,7008,6688,6214,6733,
2000,6155,6589,6884,6892,7115,7179,6915,7248,6906,6803,6245,6086,6751,
2001,5760,6198,6730,6952,6972,6868,6888,7266,6850,6909,6493,6039,6660,
2002,5929,6463,6698,7069,7113,6978,7144,7582,7037,7301,6540,6104,6830,
2003,6140,6463,6670,6951,7228,7330,7242,7384,7216,7236,6383,6565,6901,
2004,5927,6570,7660,7831,7490,7600,7497,7608,7487,7288,6875,7096,7244,
2005,6863,7714,8222,8454,8513,8706,8622,8818,8241,8256,7767,7019,8100,
2006,7184,,8440,8967,9398,9498,8818,9269,8964,9054,8679,7526,,
2007,6930,7326,7718,7702,7832,7865,8933,9378,8670,8684,7498,6462,7917,
2008,6418,7761,8460,8923,7724,7273,7204,7487,7566,7737,7027,6597,7515,
2009,6549,6838,7530,7827,7947,7852,7869,7999,8059,7755,7235,6806,7522,
2010,6740,7354,7818,8254,8265,8328,7959,7930,8184,8131,7613,7015,7799,
2011,7309,7614,7820,8250,8346,8162,7656,7844,7762,7852,7305,7117,7753,
2012,7096,7440,7691,8318,8506,8285,8195,8225,7916,8187,7455,7126,7870,
2013,6852,7660,8437,8477,8876,9238,8411,8605,8892,9004,8229,7570,8354,
2014,7487,7967,8459,9203,9075,9067,9159,9397,9440,9538,8447,8761,8833,
2015,8106,9142,9730,9943,9829,10090,9909,10244,10006,9945,9114,8601,9555,
2016,8541,9277,9897,10398,10598,10627,10397,10800,10378,10645,9966,8888,10034,
2017,8120,10899,10756,10584,10127,12363,11339,11780,12712,12913,10749,9993,11028,
2018,9679,10588,11104,11794,11923,11816,11506,11849,11824,12056,11031,10778,11329,
2019,10665,10616,11877,12422,12311,12627,12393,13012,12575,12248,12230,10895,11989,
2020,10579,11303,10383,9079,10643,11838,11371,12577,12461,12411,11464,10857,11247,
2021,10680,11128,12345,12815,13341,13645,13755,15904,15277,15274,15753,12658,13548,
2022,11391,12215,13460,14880,13751,13830,16021,14842,14352, , , ,13935,
2023, , , , , , , , , , , , , ,
2024, , , , , , , , , , , , , ,