Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1990,2818,3026,3395,3719,4051,4442,4652,4696,4119,3942,3516,2836,3772,
1991,2833,3204,3479,3732,4104,4513,4753,4898,4224,4289,3492,3324,3909,
1992,3146,3443,3719,4096,4383,4711,5005,5107,4619,4534,3914,3552,4200,
1993,3227,3405,3808,4061,4345,4828,5228,5209,4549,4395,3609,3373,4175,
1994,3200,3223,3771,3966,4348,4621,4965,5108,4551,4153,3648,3563,4099,
1995,3290,3498,3706,4036,4587,,,,4803,4665,4048,3836,,
1996,3128,3611,4040,4294,4714,5092,5531,5551,5009,4736,4098,3461,4439,
1997,3494,3735,4061,4149,4706,5034,5574,5606,5059,4998,4426,4007,4571,
1998,3498,3869,4152,4418,4872,5239,5625,5687,5104,4960,4351,3991,4647,
1999,3754,3817,4273,4424,4974,5380,5780,5989,5370,5182,4589,4207,4812,
2000,3847,4142,4446,4760,5152,5622,5881,5933,5329,5140,4390,4022,4889,
2001,3884,4166,4661,4910,5213,,,,,4755,4447,3642,,
2002,3612,3933,4177,4476,5068,5281,5585,5711,5123,4962,4393,3820,4678,
2003,3833,3833,4070,4421,4902,5234,5756,5724,5243,5030,4140,3775,4663,
2004,3367,3604,4196,4451,4715,5035,5506,5418,5103,4805,4207,3823,4519,
2005,3285,3762,4093,4317,4612,5154,5473,5362,4832,4636,4154,3719,4450,
2006,3370,3644,3995,4262,4675,5006,5301,5260,4916,4715,4161,3748,4421,
2007,3546,3826,4191,4313,4655,5142,5462,5529,5233,5009,4422,3631,4580,
2008,3239,3501,3951,4171,4600,4802,5034,,4860,4602,4095,3626,,
2009,3485,3731,3868,4213,4725,5124,5586,5352,5100,4562,4051,3643,4453,
2010,3397,3623,3992,4196,4534,5068,5577,5449,5092,4705,3830,3607,4423,
2011,3453,3580,3754,4001,4438,5021,5398,5342,4943,4580,3856,3783,4346,
2012,3483,3560,3885,4226,4645,5079,5441,5431,4946,4569,4037,3524,4402,
2013,3312,3551,3969,4063,4688,5181,5508,5436,4945,4647,4097,3624,4418,
2014,3450,3524,3991,4199,4715,5220,5728,5429,4954,4723,3997,3726,4471,
2015,3621,3956,4175,4365,4818,5527,5974,5606,5284,4851,4264,3631,4673,
2016,3514,3902,4134,4468,5129,5817,6355,5825,5489,5126,4446,3722,4827,
2017,3249,3829,4247,4593,5302,5879,6183,6032,5452,5108,4507,4020,4867,
2018,3799,4037,4126,4618,5364,6022,6509,6161,5733,5217,4453,3918,4996,
2019,3713,3548,4268,4726,5356,6035,6521,6285,5751,5146,4433,3888,4972,
2020,3605,3823,3921,3649,4859,5667,6481,6216,6024,5346,4378,4044,4834,
2021,3990,3888,4538,4958,5780,6706,7127,6346,6086,5502,4815,4039,5315,
2022,3824,4206,4440,4798,5438,6352,6610,6360,6009,5577,4536,3787,5162,
2023,3663,3681,3995,4516,5557,6589,7106,6666,6268,5722,4959,4238,5247,
2024,3710,4201,4353, , , , , , , , , , ,