Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1994,,,4129,4116,,4444,4202,4413,4310,1184,3217,4107,,
1995,4349,4528,4637,4835,4720,4893,4744,4868,4812,4859,4703,4416,4697,
1996,4451,4714,4991,5216,5249,5395,5103,5321,5201,5092,5113,4733,5048,
1997,4718,5128,5475,5584,5701,5871,5729,6021,6051,6110,5962,5932,5690,
1998,5631,6117,6437,6764,6623,6798,6720,7018,6910,7084,6532,6856,6624,
1999,6886,7249,7445,7278,7216,7946,7813,7585,7859,7888,7601,7638,7534,
2000,7264,7746,7977,8286,8443,8632,8354,8659,8514,8640,7242,4625,7865,
2001,4343,,,,,,,,8430,8934,7792,8662,,
2002,8582,9163,9444,10244,9031,9436,8703,9725,10020,10353,10053,9973,9561,
2003,9890,10380,10373,10925,11191,11411,10873,11070,11236,11253,10683,10917,10850,
2004,10450,11603,12400,12293,11680,11669,11591,11752,11869,11452,11169,11860,11649,
2005,11317,12190,12287,12609,12692,11998,11963,12978,12995,13001,12779,12740,12462,
2006,12562,13552,13878,14245,14455,10794,10561,13954,13920,14313,13576,13781,13299,
2007,13152,13900,14191,14163,13682,13377,13206,14740,14020,14516,13733,13328,13834,
2008,12323,13329,13558,14038,14170,13290,12882,13224,13047,13364,12788,12865,13240,
2009,12569,13235,13102,13842,13685,12596,13322,12960,13318,13560,12973,12996,13180,
2010,12676,13535,13489,,12157,13032,13809,,,12997,12959,13169,,
2011,12759,13168,12339,12525,11253,11836,11959,12603,12674,12847,12219,12396,12382,
2012,11966,12664,12798,13301,13395,13134,12720,11170,12614,12635,12349,12222,12581,
2013,11362,12360,12746,13065,13281,13138,12564,12613,12774,13204,13026,12896,12752,
2014,12586,13360,13887,14270,14388,14191,14115,13906,13488,13326,12884,13435,13653,
2015,13139,13700,14393,15196,15111,14960,14082,14352,14108,14492,13880,14109,14293,
2016,13880,14996,15255,16097,16142,15881,15543,16106,15974,16032,15454,15264,15552,
2017,13925,16194,16846,17250,17471,17120,16529,16253,16665,16956,16958,16589,16563,
2018,16179,17236,17902,18154,18850,19054,18954,17772,17226,17386,16719,16459,17658,
2019,16510,17269,18361,19511,19671,19506,18736,19515,19925,19976,18589,18836,18867,
2020,18086,19320,17444,16065,18551,19949,19242,19991,19499,20250,17760,18140,18691,
2021,17458,18689,20430,21831,21906,21484,20560,20534,20230,21270,19438,18705,20211,
2022,18650,19990,21081,21746,22344,21264,21324,21826,21687,22799,21057,19326,21091,
2023,19555,20803,20751,22472,22647,20947,20173,20677,21269,21344,19826,19418,20824,
2024,18150,20229,20585, , , , , , , , , , ,