Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1995,,11857,12278,12849,13174,14447,15681,14154,14425,13257,12518,11844,,
1996,10863,12105,12738,13260,13098,14824,15840,14986,13989,12712,12029,11044,13124,
1997,10763,11922,12796,13441,13732,14612,15467,15832,14703,13529,12331,11899,13419,
1998,11426,12261,13157,13954,14277,15573,16805,16663,14346,14240,13080,12329,14009,
1999,11751,12764,14061,14429,14754,16255,17627,17206,15936,14709,12908,12531,14578,
2000,12232,13238,14163,14612,15098,15723,17269,16835,15377,14802,13172,12841,14614,
2001,12112,13010,14118,15057,15392,16556,17555,17159,15985,14939,13987,12566,14870,
2002,12462,13546,14503,15370,16139,17016,18463,18194,16862,16013,14669,13990,15602,
2003,13622,13971,14685,15827,16416,17647,18970,18453,16309,15568,14248,13822,15795,
2004,13003,14358,15945,16701,15881,17973,19391,18288,17433,16056,14881,14165,16173,
2005,13081,14982,16291,16271,16521,18151,19005,19337,,,15278,14573,,
2006,14000,15245,16438,17060,17434,18595,19444,18994,18488,17286,16441,15649,17090,
2007,15157,16364,17694,18218,18783,19967,20900,20611,19262,18172,17388,15251,18147,
2008,15553,15387,16165,17561,17869,18512,19532,18376,18317,17439,15740,14406,17071,
2009,14645,15756,15996,17636,18217,19933,21739,20436,20278,17982,16665,,,
2010,15007,16232,17318,18360,18738,20602,23031,20178,19765,18680,14809,15313,18169,
2011,14936,15587,16095,17232,17653,19231,20621,19322,19000,17668,16091,15668,17425,
2012,15165,15646,16158,17723,18205,19539,20898,19559,19306,17857,16327,15354,17645,
2013,14689,15294,17117,18131,18787,20341,21586,20393,19537,18035,16448,15468,17985,
2014,15299,16025,17228,18600,18994,20614,22141,20600,20070,19022,16757,16416,18480,
2015,16452,17826,18689,19855,20282,22706,24053,21723,21763,20286,18157,17149,19912,
2016,16965,18328,19426,20808,21603,23665,24768,22881,22385,21118,19446,17173,20714,
2017,17141,18634,20416,22324,23823,25340,26985,25133,23887,22317,20398,18960,22113,
2018,18823,19762,21102,22730,23878,25946,27415,25997,25381,23312,21531,21217,23091,
2019,20153,18806,22134,23753,24188,26605,27688,26137,25734,23737,21646,20635,23435,
2020,19484,20801,19588,16665,21214,25609,27550,25967,26041,23832,20194,19317,22188,
2021,19804,20590,22720,24842,26178,29375,30585,27986,28565,26814,24003,21026,25207,
2022,20592,22399,23059,25114,26420,28425,29037,27171,27606,26027,22335,20634,24902,
2023,21151,21723,22298,25458,27412,30039,32079,30217,29912,27478,24586,22522,26240,
2024,21284,23082,23915, , , , , , , , , , ,