Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1990,7021,7209,7732,7977,8098,8320,8323,8436,7879,7646,7228,6897,7733,
1991,7516,7466,7453,7860,7948,8124,8208,8283,8010,7956,7545,7219,7801,
1992,7400,7508,7727,8029,8248,8603,8330,8279,8309,8014,7532,7230,7956,
1993,7619,7850,8060,8469,8685,9032,8761,8727,8465,7860,7246,6956,8145,
1994,6888,7330,7677,7710,7766,8452,7707,8017,7777,7890,7274,7614,7677,
1995,7330,7500,7644,7893,8110,8333,8065,8339,8169,8008,7636,7652,7890,
1996,7616,8143,8187,8506,8454,8883,8728,8810,8583,8701,8118,8073,8400,
1997,7755,8360,8445,8708,8887,9276,8935,8952,8969,9064,8412,8355,8677,
1998,8203,8499,8773,9077,9096,9407,9690,9340,9094,9385,8825,8825,9018,
1999,8469,8664,9140,9213,9480,9833,9647,9433,9319,9645,8950,8788,9215,
2000,8436,9068,9027,9376,9407,9494,9297,9228,9153,9269,8658,8667,9090,
2001,8305,8631,8980,9334,9346,9627,9321,9419,9227,9326,8534,8252,9025,
2002,8302,8342,8789,9256,9458,9517,9450,9477,9106,9466,8792,8703,9055,
2003,8651,8721,8680,9241,9427,9621,9373,9134,9276,9661,8637,8536,9080,
2004,8424,8789,9263,9478,9372,9584,8818,7543,8128,,,7387,,
2005,7728,8331,8752,8955,9044,9509,9050,9225,9221,9245,8806,8584,8871,
2006,8591,9059,9322,7765,8808,9573,9114,9375,9623,9567,8943,8826,9047,
2007,8829,9164,9157,9423,10055,,,10048,9565,10092,9263,8771,,
2008,9137,9345,9372,9603,9777,9610,9481,8920,9064,9490,8727,8887,9284,
2009,8696,8921,9118,9705,10258,9876,9817,9700,9579,9887,8917,8794,9439,
2010,8342,8772,9098,9331,9145,9844,9466,9365,9467,9598,9057,8918,9200,
2011,8409,8632,8777,9044,9152,9461,8958,9348,,,,,8997,
2012,,,,,,,,,,,,10000,,
2013,10242,10574,10966,10991,11402,11567,10492,,,10582,9463,9288,,
2014,9030,9341,9783,9847,10028,10250,10171,10573,10266,10213,9340,9777,9885,
2015,9859,10438,10482,10888,10560,11106,10748,11148,11021,10885,9964,10039,10595,
2016,9970,10464,10859,11512,11643,12378,11414,11496,11290,11437,10740,10489,11141,
2017,10172,10655,11493,11801,11780,11989,11821,12579,11723,11705,10914,10677,11442,
2018,10566,10906,11280,11918,12053,12809,12222,12475,12115,11925,11154,10779,11683,
2019,10713,11069,11677,11949,11827,12210,11978,13276,12578,12267,11521,11111,11848,
2020,11017,11298,10660,9816,11358,12357,11910,12320,12646,12448,10929,11262,11502,
2021,11304,11582,12315,12700,12892,13455,13909,13998,13848,13275,12154,11864,12775,
2022,12032,12096,12289,12776,13104,13866,13172,13411,13817,13139,11705,11383,12732,
2023,11773,12271,12264,12733,12982,13147,12934,13339,13228,13350,11983,11691,12641,
2024,11381,12237,12461, , , , , , , , , , ,