Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1994,,,4438,4483,4763,6126,6873,6862,5543,4757,4147,4512,,
1995,3988,4118,4868,4935,5406,6494,6773,7005,6027,5407,5016,4619,5388,
1996,3615,4057,5124,5309,5670,6750,7325,7438,6161,5619,5228,4491,5566,
1997,4078,4431,5342,5395,5901,6953,7485,7639,6244,5757,5429,5108,5814,
1998,4303,4550,5373,5681,6056,7036,8096,8357,6467,6132,5417,4788,6021,
1999,4720,4993,5851,5881,6495,7546,8155,8251,6956,6385,5628,5473,6361,
2000,4648,4954,6042,6075,7014,7488,8014,8212,6597,6462,5849,5285,6387,
2001,4703,5157,6121,6371,6705,7584,8082,8166,7109,6128,6444,5303,6489,
2002,4663,5244,6086,6279,6699,8063,8360,8516,6867,6723,6130,5899,6627,
2003,5316,5227,6141,6346,6908,8030,8659,8752,7079,6838,6295,5715,6776,
2004,4914,5198,6512,6779,6921,7809,8475,8383,7250,6883,6466,6041,6803,
2005,5145,5757,6817,6798,7000,8125,8900,8498,7227,6971,6914,6333,7040,
2006,5765,6120,6914,7250,7545,8666,9111,8761,7738,7437,7053,6408,7397,
2007,5595,6045,7258,7262,7577,8585,9135,9183,7840,,7091,5959,,
2008,5148,5349,6850,6790,7226,7788,8403,8318,6986,6832,6685,5190,6797,
2009,5379,5661,6714,6796,7414,8337,9017,8661,7455,7063,6668,5856,7085,
2010,5406,5734,6617,7064,7222,8077,8929,8696,7798,7321,6377,5900,7095,
2011,5467,5686,6777,7079,7442,8471,9235,8750,7361,7213,6736,6238,7204,
2012,5513,5821,6879,7075,7627,8648,9307,9254,7783,7669,7199,6493,7439,
2013,5577,6070,7444,7380,7948,9287,9948,9481,8027,8104,7100,6633,7750,
2014,6049,6291,7786,7654,8150,9366,9979,9634,8332,8219,7420,6993,7989,
2015,6679,6974,8269,8284,8786,10238,10810,10452,9355,9003,8222,7342,8701,
2016,6922,7441,8793,8712,9345,10786,11383,10904,9690,9405,8667,7627,9140,
2017,6685,7676,9150,9258,9777,11250,12238,11770,10248,9841,9167,8192,9604,
2018,7445,7990,9689,9596,10275,11675,12413,11399,10221,9827,9684,,10019,
2019, , , , ,11798,12734,13472,12757,11364,10979,9784,9171,11507,
2020,8012,8629,9039,7222,9890,11669,13144,12887,12095,12514,9881,9189,10348,
2021,8939,8784,11050,11681,12480,13936,14716,13763,12652,12023,11547,9952,11793,
2022,9284,10079,11661,11844,12709,14073,13991,13488,12670,12050,11200,9642,11891,
2023,8933,9212,10703,11228,12512,14006,14512,13605,12340,12139,11531,10039,11730,
2024,8624,9873,11222, , , , , , , , , , ,