Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1998,,,,,,,,,,,4150,5592,,
1999,4772,4914,5370,5494,5108,5106,4920,5204,5209,5419,4908,5643,5172,
2000,6050,3737,8521,7041,6323,6076,5838,4517,4219,4403,5252,5737,5643,
2001,4684,5204,5416,5342,5362,5350,4948,5781,5777,5979,5934,6299,5506,
2002,5588,5884,5843,5776,5645,5813,5640,6051,5928,6270,5885,6151,5873,
2003,4968,4988,4917,4878,,4092,4388,4542,5188,5448,5303,5881,,
2004,4876,5441,5400,5519,5371,5485,5258,5327,5612,5642,5664,6224,5485,
2005,5367,5508,5544,5606,5460,5581,5229,5674,5425,5390,5518,6010,5526,
2006,5162,5445,5548,5468,5495,5476,5047,5445,5418,5285,5442,5951,5432,
2007,5213,5449,5476,5259,5193,5110,4891,5227,5520,5615,5517,5799,5356,
2008,4846,5350,5265,5351,5275,4972,4868,5059,5083,5338,5053,5406,5156,
2009,4825,5128,4983,5117,4884,4866,4663,4934,4920,5034,4882,5324,4963,
2010,4666,5002,4992,4984,4888,4804,4706,4944,5043,5133,4914,5467,4962,
2011,4851,5086,5097,5071,4976,4885,4668,4943,4881,5043,4956,5527,4999,
2012,4637,5048,4994,5061,4913,4864,4672,4936,4844,4967,4892,5324,4929,
2013,4249,4902,4894,4914,4798,4721,4517,4775,4767,4795,4732,4923,4749,
2014,4418,4626,4434,4583,4641,4628,4519,4828,4778,4795,4506,5064,4652,
2015,4419,4786,4686,4925,4744,4876,4571,4701,4654,4865,4724,5063,4751,
2016,4338,4597,4636,4792,4682,4744,4564,4788,4730,4849,4807,4820,4696,
2017,3945,4546,4717,4824,4842,4920,4705,4886,4802,4810,4811,5033,4737,
2018,4472,4646,4906,5044,5056,4939,4824,5134,4964,5121,4965,4975,4921,
2019,4416,4507,4815,4671,4474,4243,4145,4670,4657,4632,4488,4961,4557,
2020,4448,4771,3275,1650,2701,3586,3327,3624,3706,3862,3543,3828,3527,
2021,3661,3815,4258,4337,4446,4481,4404,4545,4400,4341,4261,4487,4286,
2022,3882,4265,4364,4522,4368,4260,4098,4474,4368,4375,4181,4237,4283,
2023,4071,4239,4280,4346,4338,4271,4111,4416,4297,4287,4210,4300,4264,
2024,3679,4152,4115, , , , , , , , , , ,