Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg.,
1992,,,,,,,,,16368,18748,17638,17830,,
1993,16061,19376,20515,21236,15299,19552,20720,21507,23234,23282,23454,20880,20419,
1994,21853,23746,25012,24719,24160,25281,23719,25130,25928,25496,24586,23829,24453,
1995,23594,25547,26972,25415,,26514,24934,26270,26979,27288,26125,24655,,
1996,24739,26235,27358,27551,25882,26764,25004,26350,27382,26834,26433,23750,26190,
1997,24415,26779,26596,27940,26813,27192,25487,26693,27890,27530,26982,25721,26670,
1998,25144,27820,27760,28373,27067,28065,26044,27202,27486,27644,25816,25982,27034,
1999,26375,27827,28355,29207,27787,28088,26319,27754,28403,28912,27622,26329,27748,
2000,26212,28179,25123,25033,27505,27523,,27747,27541,27716,26244,26074,,
2001,25238,27734,28153,29194,28091,28744,27211,28818,29497,30310,29280,27132,28284,
2002,28606,30553,29988,32517,30691,29614,28882,30344,30949,31952,29885,29186,30264,
2003,30343,32491,31548,33543,31715,31742,30679,30873,32543,32389,29392,29822,31423,
2004,28500,31096,32309,32976,30456,30850,29081,30115,32218,30508,,28138,,
2005,29992,32044,32193,32730,30718,31609,29333,31917,31476,31717,31197,29851,31231,
2006,30140,32214,32699,32196,31717,31692,29267,31907,32271,32197,31438,29424,31430,
2007,30664,32179,32528,32989,31862,31154,29795,31931,31748,33928,,25876,,
2008,28757,32077,31097,33180,31331,29865,29245,29625,31631,32088,29233,28738,30572,
2009,28432,31779,30834,33045,30312,30353,29708,29667,32056,31905,30299,29360,30646,
2010,28568,31975,32592,32498,30997,31117,30316,31594,32850,32385,30344,29399,31220,
2011,30233,31814,31974,32575,30911,30896,29553,31136,31782,31937,29949,29554,31026,
2012,28825,31458,31216,32228,30638,30254,28740,30378,31569,32244,30590,29475,30635,
2013,27177,31537,32536,32745,31677,30973,29503,31060,32092,32135,30384,28352,30848,
2014,28532,30778,31855,32929,31594,31439,29654,30997,31833,32199,28815,29501,30844,
2015,29281,31646,31838,32676,31105,31273,30280,31126,32183,32369,31321,30745,31320,
2016,31009,33178,33149,34203,32475,32462,31115,32785,33676,34067,31823,28885,32402,
2017,27339,32532,33390,34625,33126,33417,31338,33328,33889,34052,32318,31080,32536,
2018,31825,33239,33801,35527,34016,33440,32790,34689,35011,34980,33682,31105,33675,
2019,31912,33103,34822,35869,34271,34316,32704,34672,35465,35463,33009,32066,33973,
2020,31922,34478,25587,15611,20637,25139,24103,26259,26916,27535,24294,23859,25531,
2021,25075,26420,29179,29978,30085,31111,30370,31602,31396,31599,30120,28819,29646,
2022,28295,31523,32241,33146,32070,31587,30309,32703,33198,33591,30168,30638,31622,
2023,31374,32424,32165,33038,33093,32516,30946,32611,33517,33691,31866,30102,32279,
2024,28401,32012,31484, , , , , , , , , , ,