YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1990,4981,5271,5379,5504,5610,5559,5453,5296,4940,5134,5172,4946,5270
1991,4664,5139,5231,5431,5646,5521,5363,5391,5587,5638,5184,5291,5341
1992,5071,5475,5542,5720,5838,5733,5455,5497,6658,5619,5271,5382,5618
1993,4729,5041,5424,5684,5929,6018,5701,5673,5792,5921,5711,5610,5605
1994,5500,5615,5657,6899,6416,6108,6557,5924,6022,5994,5863,5785,6030
1995,5654,5905,5929,6061,6272,6311,5919,6222,6148,6196,5928,6051,6050
1996,5546,5912,6133,6218,6200,6193,5789,5843,6030,6022,5921,5678,5957
1997,5740,6012,5823,6430,6130,5845,5850,5930,6084,5976,5798,5765,5949
1998,5486,5800,5883,5999,6031,5934,5771,5764,5741,5845,5640,5645,5795
1999,5455,5655,5879,5926,6128,6114,5744,5745,5940,6055,5856,5850,5862
2000,5533,5888,5973,6141,6185,6018,5607,5818,5934,5990,5373,5194,5805
2001,4928,5234,5417,5686,5819,5441,5052,5142,5258,5286,5201,4952,5285
2002,4956,5021,5197,5406,5639,5196,5108,5356,5154,5189,5024,5040,5191
2003,4900,5030,4935,5384,5443,5239,5053,5240,5713,6161,4743,4915,5230
2004,4496,4642,5143,5526,5550,5478,5144,5189,5267,5410,5267,5502,5218
2005,4688,5325,5429,5528,5565,5558,5137,5401,5380,5318,5225,5285,5320
2006,5026,5379,5443,5651,5727,5481,5117,5476,5519,5493,5296,5299,5409
2007,4993,5334,5400,5508,5663,5404,5172,5351,5182,5454,5174,5072,5309
2008,4904,5155,4976,5343,5394,5627,5677,5648,5905,5532,5124,5232,5376
2009,4906,5212,5119,5650,5813,5617,5325,5282,5319,5452,5097,5230,5335
2010,4922,5317,5369,5625,5521,5467,5336,5367,5463,5464,4926,5172,5329
2011,4785,5099,5046,5269,5357,5249,5058,5168,5179,5328