YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1990,2662,2890,3345,3639,3914,4402,4062,4032,3934,4168,3390,2914,3616
1991,2685,3055,3404,3598,3993,4564,4721,4659,4266,4458,3845,3275,3882
1992,3087,3411,3740,3882,4035,4227
1993,,,,,,,4610,4724,4583,4778,4034,3660
1994,3515,3848,4156,4143,4551,4452,4725,4738,4676,4929,4161,4103,4337
1995,3826,4158,4382,4669,4920,5377,5189,5281,5188,5317,4516,4092,4743
1996,3719,4079,4580,4868,5185,5743,5384,5526,5327,5553,4741,4379,4924
1997,2596,4486,4734,4909,5191,5585,5750,5671,5329,5490,4749,4503,4916
1998,4038,4587,4852,5186,5204,5891,5690,5734,5664,5972,5150,4639,5217
1999,4506,4693,5170,5309,5600,6194,5933,5944,5985,5965,5232,4686,5435
2000,4288,4756,5031,5348,5590,6406,5750,5449,5627,5830,4873,4581,5294
2001,4219,4599,5016,5392,5850,6124,5857,5861,5907,6071,5358,4708,5414
2002,4594,4971,5161,5647,6118,6562,6016,6161,6104,6348,5436,4992,5676
2003,4747,5161,5345,5616,6147,6652,6115,6099,6186,6409,5448,5171,5758
2004,4710,5188,5698,6040,6191,6828,6424,6267,6301,6416,5493,5305,5905
2005,4815,5380,5741,5896,6238,6806,6452,6318,6057,6161,5484,5159,5876
2006,4940,5394,5596,5947,6263,6914,6396,6504,6459,6479,5718,5284,5991
2007,5065,5391,5894,6133,6438,6691,6305,6439,6625,6491,5651,4994,6010
2008,4729,5128,5364,5614,5985,6244,5953