Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1990,1672,1654,2103,2495,2990,3344,3990,3975,3232,2630,2246,1744,2679,
1991,1612,1829,2018,2527,3047,3399,4340,4458,3473,2979,2313,2094,2848,
1992,1840,2067,2529,2779,3412,3611,4419,4421,3450,3027,2370,2145,3019,
1993,1759,1989,2285,2779,3372,3790,4415,4601,3930,3419,2697,2366,3124,
1994,2237,2219,2549,3122,3709,4103,4901,4819,4012,3458,2675,2445,3362,
1995,2349,2498,2689,3133,3794,4295,4959,4908,4177,3560,3005,2720,3507,
1996,2225,2401,2674,3209,3736,4287,5027,5090,4153,3538,2693,2403,3453,
1997,2227,2425,2515,2735,3405,4033,4980,5411,3895,2879,3109,2692,3359,
1998,2210,2572,2857,3408,3973,4311,5047,4999,4376,4122,3300,2735,3659,
1999,2605,2615,2989,3596,3982,4435,5223,5191,4294,3777,3279,2977,3747,
2000,2350,2719,2986,3487,3991,4409,5118,5132,4083,3647,3035,2641,3633,
2001,2271,2439,2897,3319,3985,4434,5291,5410,4354,3713,3233,2720,3672,
2002,2578,2808,3083,4019,4775,5145,5579,5682,4481,3957,3426,3094,4052,
2003,2861,3084,3324,3669,4348,4795,5649,5879,4547,4192,3215,3014,4048,
2004,2632,3126,3455,3970,4314,4872,5790,5577,4696,4096,3482,3326,4111,
2005,2783,3284,3437,3816,4382,4922,5722,5492,4493,3929,3514,3183,4080,
2006,3016,3175,3467,3805,4406,4766,5518,5441,4671,4181,3508,3280,4103,
2007,3079,3293,3662,4045,4590,5085,5765,5720,4741,4422,3832,3111,4279,
2008,2633,2981,3246,3514,4113,4355,5088,5050,4344,3827,3309,3118,3798,
2009,2862,2884,2932,3435,3891,4276,5092,4977,4348,3669,3205,2958,3711,
2010,2748,2945,3205,3300,3725,4176,5111,4983,4215,3649,2920,2748,3644,
2011,2520,2604,2884,3096,3528,3938,4811,4844,4030,3444,2790,2833,3444,
2012,2488,2660,2745,3083,3493,3753,4759,4798,3954,3360,2913,2649,3388,
2013,2411,2696,2894,3066,3649,4040,4993,4938,3979,3546,3009,2713,3495,
2014,2601,2602,3071,3288,3755,3909,4637,4670,3898,3531,2976,2781,3477,
2015,2474,2882,3030,3365,3840,4328,5066,4709,4195,3760,3215,2809,3639,
2016,2711,2994,3209,3587,4082,4572,5295,5191,4338,3724,3411,3018,3844,
2017,2775,2892,3264,3623,4324,4775,5651,5451,4513,4134,3325,3011,3978,
2018,2868,2893,3313,3654,4601,4953,5862,5523,4726,4209,3624,3258,4124,
2019,3123,2936,3289,3984,4040,4268,4975,4699,4911,4348,3806,3468,4008,
2020,3131,3533,3317,3306,4356,5026,6037,6070,5370,4719,3883,3690,4370,
2021,3786,3784,4387,4769,5418,6180,6888,6261,5641,5141,4395,3844,5041,
2022,3651,4007,4295,4581,5175,5707,6653,6483,5830,5167,4039,3489,4923,
2023,3866,3874,4155,4643,5516,6068,6987,6446,5831,5245,4470,4117,5101,
2024,3567,4009,4396, , , , , , , , , , ,