YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1990,2556,2718,3142,3516,3564,3926,4162,4235,3798,3650,3154,2559,3419
1991,2554,2830,3411,3421,3685,3967,4300,4617,3852,3756,3140,2992,3549
1992,2856,3070,3670,3701,3643,3932,4588,4468,3992,3893,3346,2914,3685
1993,2634,2858,3451,3974,3870,4190,4788,4803,4336,4129,3469,3182,3813
1994,3040,3181,3795,4025,3971,4321,4798,4345,4087,3965,3460,3036,3839
1995,3030,3252,3698,4019,4023,4348,4967,5023,4491,4303,3695,3312,4013
1996,2842,2980,3769,4033,4008,4506,5004,4946,4316,4410,3785,3382,3998
1997,3244,3509,4118,4105,4075,5157,5233,5271,4542,4566,4026,3689,4295
1998,3329,3565,4042,4541,4500,4954,5398,5545,4639,4592,4101,3559,4397
1999,3378,3653,4265,4508,4595,4937,5533,5484,4858,4724,4341,3837,4509
2000,3557,3811,4328,4480,4302,,5591,5581,4758,4712,4295,3781
2001,3568,3737,4341,4424,4485,5016,5596,5595,4850,4849,4529,3870,4572
2002,3575,3905,4402,4622,4729,5306,5784,5899,5053,5097,4460,4203,4753
2003,3864,3981,4446,4754,4962,5479,6038,6088,5248,5273,4621,4239,4916
2004,3708,3934,4617,5071,4905,5386,6030,5803,5252,5106,4572,4120,4875
2005,3587,4008,4703,4677,4785,5390,6058,5822,4967,4685,4463,4091,4770
2006,3853,4066,4665,4909,4881,5355,5798,5646,5044,4983,4578,4235,4834
2007,3880,4074,4794,4939,4936,5383,5860,5950,5203,5147,4785,4121,4923
2008,3696,3944,4697,4863,4927,5069,5523