Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1990,6382,6858,7776,8056,8245,9270,9401,9407,8297,7944,7606,6281,7966,
1991,6413,7188,8097,8318,8620,9573,9799,9938,8859,8448,7599,7274,8351,
1992,7006,7650,8349,8697,8935,9825,10021,10259,9555,8910,7882,7290,8725,
1993,6851,7709,8659,9185,9350,10404,10727,10837,9773,9179,8232,7665,9055,
1994,7697,7751,9207,9430,9579,10538,10950,11039,9991,9442,8644,8108,9375,
1995,7927,8464,9221,9565,9768,10787,11038,11236,10488,9889,9185,8534,9675,
1996,7580,8625,9795,10015,10230,11448,11328,11561,10323,9862,9216,7925,9826,
1997,7916,8740,9705,10082,10618,11009,11386,11793,11005,10336,9820,8830,10103,
1998,8336,9169,10051,10855,11067,12331,12419,12790,11661,10997,10304,9343,10777,
1999,8928,9357,10715,10996,11533,12864,12618,10430,11782,11336,10556,9506,10885,
2000,8979,9608,10673,11013,11403,12548,12750,12992,11729,11193,10148,9570,11051,
2001,9055,9659,10819,11210,11569,12755,13535,13880,11683,11206,10502,8917,11233,
2002,8793,9757,10536,10818,11458,12212,12111,12439,11528,11055,10281,9566,10880,
2003,9146,9550,10233,10678,11135,12158,12088,11744,11085,11119,10063,9098,10675,
2004,8496,9039,10714,11181,11203,12302,12725,12619,11797,11474,10305,9727,10965,
2005,8617,9933,11042,11194,11504,12389,12646,12740,11589,10800,10340,9286,11007,
2006,8837,9665,10550,10993,11462,12490,12413,12361,11778,10988,10492,9580,10967,
2007,9066,9757,10928,11214,11530,12461,12633,12779,11736,11330,10771,9229,11120,
2008,8811,9555,10341,10785,10985,11701,11873,11679,11344,10714,10029,8701,10543,
2009,8663,9424,10184,10851,11135,12079,12376,12107,11645,10722,10219,9131,10711,
2010,8821,9580,9941,10142,10585,11293,11669,11496,10935,10354,9590,9126,10294,
2011,8867,9262,10093,10370,10390,11618,12240,11926,11577,10993,10137,9445,10576,
2012,8870,9486,10198,10854,11255,,,,11697,11146,10438,9270,10357,
2013,8461,9349,10484,10633,11197,11832,12021,12080,11029,10543,10096,9112,10570,
2014,8844,9264,10543,11019,11321,12241,12654,,11861,11561,10501,9858,,
2015,9428,10202,11454,11816,12170,13346,13460,13204,12674,11941,11117,10184,11750,
2016,9548,10543,11769,12302,12878,14367,14450,14313,13404,12831,12189,9959,12379,
2017,9043,10117,12051,12755,13798,14866,14414,14336,13274,12830,12053,10586,12510,
2018,10296,10740,11821,12825,13529,14767,14815,15093,14117,13431,12434,10632,12875,
2019,10468,10502,12387,13419,14009,15169,15016,14841,14186,12926,12116,10918,12996,
2020,10291,11030,10617,8813,11265,13405,14299,14053,14136,12908,11141,10623,11882,
2021,10453,10605,12673,13396,14104,15722,15922,15372,15058,13922,13011,11096,13445,
2022,10335,11011,12315,13218,14175,15294,14999,14715,13983,13497,11954,10453,12996,
2023,10625,11090,11538,13169,14522,15298,15333,15026,14857,14236,13030,11390,13343,
2024,10291,11391,11829, , , , , , , , , , ,