Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1998,,,,,,,,3480,3617,4004,3356,2944,,
1999,2913,2940,3207,3412,3487,3671,3496,3654,3746,4175,3774,3307,3482,
2000,2972,3200,3468,3693,3758,3909,3692,3901,3835,4034,3731,3305,3625,
2001,3036,3051,3396,3550,3678,3820,3706,3763,3864,4171,3869,3293,3600,
2002,3063,3229,3509,3771,3901,3933,3824,3984,3917,4292,3956,3505,3740,
2003,3290,3474,3474,3742,3950,4066,3953,3945,4076,4300,3661,3425,3780,
2004,3114,3301,3638,3839,3761,3844,3758,3846,3929,4107,3915,3665,3726,
2005,3138,3463,3646,3735,3746,3998,3871,3956,3932,3825,3352,3068,3644,
2006,3199,3474,3581,3775,3959,4111,3930,4102,4165,3989,3591,3302,3765,
2007,3323,3549,3725,3795,3929,4057,4192,4002,4124,4099,3581,3176,3796,
2008,2953,3202,3477,3681,3729,3726,3727,3683,3817,3892,3371,3037,3525,
2009,2983,3357,3466,3841,3894,4017,3870,4047,4075,3813,3440,3116,3660,
2010,2995,3364,3587,3781,3786,4021,3887,3996,4172,3957,3573,3152,3689,
2011,3061,3368,3383,3634,3696,3908,3699,3853,3973,3945,3445,3212,3598,
2012,3100,3326,3389,3704,3854,3890,3833,3813,4007,3900,3480,3203,3625,
2013,3012,3383,3674,3912,4004,4073,3864,4027,4079,4119,3572,3297,3751,
2014,3085,3310,3676,3941,4071,4181,3919,4113,4191,4118,3445,3377,3786,
2015,3281,3657,3861,4089,4011,4078,4016,4059,4263,4161,3589,3362,3869,
2016,3265,3662,3883,4236,4280,4464,4240,4369,4536,4277,3899,3225,4028,
2017,2927,3669,4124,4347,4409,3948,3944,4178,4244,4332,3757,3602,3957,
2018,3611,3915,4213,4542,4872,4920,4549,4763,5019,4784,4325,3967,4457,
2019,3945,3984,4472,4852,4902,4988,4708,4826,5015,4995,4554,4116,4613,
2020,4071,4395,4301,4101,4722,4977,4975,5144,4871,5321,4647,4306,4653,
2021,4313,4400,5050,5461,5564,5680,5417,6024,5499,5413,4943,4418,5182,
2022,4273,4623,4957,5320,5418,5343,5118,5424,5574,5489,4707,4218,5039,
2023,4398,4687,4852,5469,5580,5571,5517,5584,5773,5645,5066,4624,5231,
2024,4132,4840,5129, , , , , , , , , , ,