Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1990,4932,4516,6660,7584,8679,10420,12149,12314,10091,7917,6592,5475,8134,
1991,5052,6024,6890,7493,8672,10564,12594,13057,10478,8488,6741,6875,8596,
1992,5965,6875,8082,8446,9711,11371,13149,13447,10880,9305,7487,6525,9306,
1993,5889,6653,7680,8744,10154,12004,14035,14421,11912,10066,7897,7755,9789,
1994,7045,7111,8459,9485,10940,12779,14551,14213,12032,10028,7798,7684,10199,
1995,7014,7625,8347,9392,10651,,14277,14864,12008,10072,8229,8121,,
1996,6747,7541,8609,9488,11164,13026,15050,14976,11927,10252,7578,6781,10262,
1997,6518,7555,8280,9107,10854,12581,14769,15300,11972,10287,8872,8201,10358,
1998,6953,8029,9052,10136,11484,13571,15418,15511,13066,11057,9223,8260,10980,
1999,7472,7876,9005,10145,11072,14392,15763,15861,12407,11028,9551,8513,11090,
2000,7366,8333,9566,9902,11343,13729,15894,15747,12407,10970,9078,8267,11050,
2001,7679,7993,9331,9911,11889,13519,15570,16079,13159,11101,9608,8548,11199,
2002,7632,8525,8969,10207,12050,14126,15971,16184,12877,11186,9463,8902,11341,
2003,8026,8645,9188,10261,12067,14129,16180,17245,12867,11608,8607,8333,11430,
2004,8209,9282,9961,11334,12195,14329,16572,16493,12138,11559,9675,8942,11724,
2005,7498,8753,9794,10237,10860,12383,14117,14909,12739,10925,9609,,,
2006,8724,8632,10366,10954,11734,13315,15649,15524,12588,11218,9111,9055,11406,
2007,7702,,9788,10678,11948,13629,16051,15706,12864,11403,9795,8677,,
2008,7491,8027,9399,9617,11284,12554,14526,14683,11779,10459,9026,7027,10489,
2009,7309,8341,8658,9747,11563,13156,16006,15381,13304,10704,9555,7992,10976,
2010,7797,8551,9511,10005,11312,13179,15827,15753,12885,10785,8616,8205,11036,
2011,7528,7970,9095,9737,10969,12712,15447,15628,12631,10579,8633,8054,10749,
2012,7370,8263,8874,9739,10680,13383,15988,16314,12549,10882,9223,8586,10988,
2013,7690,8159,8950,9603,12040,13832,16572,16290,12893,10909,9146,8897,11248,
2014,8160,8169,9141,10456,12088,14193,16760,16773,13535,11659,9624,8984,11628,
2015,8322,9583,10512,11483,13169,15280,17275,16293,14021,12092,10393,8992,12285,
2016,8869,9751,10882,11892,13584,15870,18263,17803,15078,12310,10970,9270,12878,
2017,8938,9136,10806,11714,13903,16387,18990,18350,14644,12657,10736,9568,12986,
2018,9265,9249,10910,11457,14260,16346,18798,17988,15132,12684,10972,10163,13102,
2019,9713,8548,10744,11746,14428,16670,19162,18284,14931,12270,10846,9787,13094,
2020,9189, ,9827,8341,11946,15506,18352,18169,16199,13050,10536,10542,12807,
2021,10655,10258,12648,13625,15526,18531,20459,18869,16795,14391,12439,10726,14577,
2022,10093,11352,12496,12841,14708,17088,18989, , , , , ,14286,
2023, , , , , , , , , , , , , ,
2024, , , , , , , , , , , , , ,