Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1990,20890,23168,24160,23881,27278,28179,26716,27360,24416,23790,23910,23222,24757,
1991,21033,23219,24664,25755,27724,27589,27982,27945,24871,24125,24247,26495,25488,
1992,24004,25407,27569,30341,32768,29722,29602,29964,28022,28409,27974,29224,28675,
1993,25248,26038,28026,30882,30791,27463,27353,27685,26024,30858,28310,31299,28352,
1994,25827,26601,30398,33057,33684,35999,34827,34980,29965,31386,28794,31834,31480,
1995,,,,,,,,,,,,,,
1996,,,31792,33842,34754,36179,35191,35796,32431,28741,31367,31850,,
1997,29287,30970,31869,32791,34075,33970,33914,35161,33044,33441,32840,34094,32955,
1998,31764,34733,36498,37681,38674,39072,37360,37581,35002,34903,33291,33710,35856,
1999,31705,32395,35252,37164,37970,37950,36304,36929,34703,34462,33004,33592,35119,
2000,30831,32659,33926,35431,35953,36246,34645,35620,33694,33476,31897,32872,33938,
2001,29802,31877,33656,34855,35898,36582,35403,36574,33881,34310,33100,32835,34064,
2002,30947,32698,33450,35539,36445,35542,34077,36811,35284,35693,34334,35022,34654,
2003,33148,34872,35389,37530,39549,37657,37859,38774,38141,38194,35789,36712,36968,
2004,33112,35335,37617,39063,38570,39060,38753,38897,37169,36766,35551,37035,37244,
2005,33935,36081,37540,38558,38742,39829,38449,40295,37770,37622,36379,37180,37698,
2006,35236,37206,38045,39362,40783,40843,39014,40975,38692,38302,37169,37408,38586,
2007,35202,36974,39125,39756,39077,,,,38457,38051,36592,36205,,
2008,33316,35913,36675,38574,39254,37796,37101,37345,35935,36003,34371,34871,36430,
2009,33183,34832,35071,36756,32469,34028,34511,35302,34617,34478,33508,34219,34415,
2010,31850,33814,35356,36330,36575,36431,35799,37131,35332,34955,33418,34087,35090,
2011,32585,33762,34635,35889,36889,36267,35561,37434,35186,35261,34062,35325,35238,
2012,32642,34420,34865,37053,38602,37139,36446,37817,36307,36457,35462,35976,36099,
2013,32071,35361,36911,38170,39498,38250,37030,38338,36867,36467,35182,34488,36553,
2014,33013,34591,36357,38288,39034,38449,37156,38106,36524,36637,33392,35240,36399,
2015,33296,35821,36872,38565,39146,38974,37564,38485,37031,36917,35187,35628,36957,
2016,34145,36111,37097,39165,39823,39231,37618,39053,37290,37333,36026,34387,37273,
2017,29682,34189,36476,37775,38737,38182,37341,38911,37163,37659,36441,36683,36603,
2018,34863,36956,38907,42481,42776,42596,41027,42245,40581,40407,38467,37759,39922,
2019,36600,36892,39216,40907,40723,40697,39359,40944,39498,39078,37402,37311,39052,
2020,35648,37311,31661,25556,32841,36640,35622,36522,36125,36486,33608,33852,34323,
2021,32271,33337,36572,38822,39509,39643,38423,39356,37453,37477,35827,35785,37039,
2022,33104,35798,36952,38138,38702,38258,37327,39252,37587,37717,35271,34620,36894,
2023,34766,36020,36339,38596,39684,39259,38377,38376, , , , ,37677,
2024, , , , , , , , , , , , , ,